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Artykuły w czasopismach na temat „CP Higgs”

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Data publikacji: 6 września 2023

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1

JOSHIPURA, ANJAN S. "NEUTRAL HIGGS AND CP VIOLATION". Modern Physics Letters A 06, nr 18 (14.06.1991): 1693–700. http://dx.doi.org/10.1142/s0217732391001834.

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An extended SU (2) × U (1) model with two-Higgs doublets and a discrete symmetry is considered. The latter is chosen to naturally obtain suppressed and hierarchical flavor-changing neutral currents induced by Higgs bosons. As a consequence, Higgs as light as 10 GeV is consistent with the observed KL – KS mass difference and problems with perturbative unitarity are avoided. In this model, the neutral Higgs can generate CP violation in K0 − K0 system and the consequences of a scheme where these exchanges provide the only source of CP violation are worked out.

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2

Ouhammou, M., M. Ouali, S. Taj, R. Benbrik, B. Manaut i E. Hrour. "Laser-assisted CP-odd and CP-even Higgs bosons production in THDM". Laser Physics Letters 19, nr 11 (6.10.2022): 116002. http://dx.doi.org/10.1088/1612-202x/ac9528.

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Abstract In this paper, we have theoretically studied the neutral Higgs pair production in Two Higgs Doublet Model (THDM) in the presence of a circularly polarized laser field. The laser-assisted differential partial cross section is derived in the centre of mass frame at the leading order including Z diagram. The total cross section is computed numerically by integrating the differential cross section over the solid angle d Ω . Two benchmark points are discussed for the THDM parameters. In the first step, we have analysed the total cross section of e + e − → h 0 A 0 by considering H 0 as the standard model (SM)-like Higgs boson. Then, the process e + e − → H 0 A 0 is studied by taking h 0 as the Higgs boson of the SM. For both benchmark points, the laser-assisted total cross section of the studied processes depends on the produced neutral Higgs masses, the centre of mass energy and the laser field parameters. In addition, the maximum cross section occurs at high centre of mass energy for the process e + e − → H 0 A 0 as compared to that of e + e − → h 0 A 0 .

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3

HE, XIAO-GANG, J. P. MA i BRUCE McKELLAR. "CP VIOLATION IN HIGGS DECAYS". Modern Physics Letters A 09, nr 03 (30.01.1994): 205–10. http://dx.doi.org/10.1142/s0217732394000228.

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We study CP violation in fermion pair decays of Higgs boson. We identify some CP odd observables related to the tree level decay amplitude. We find that a few thousands Higgs boson decay events can already provide important information about CP violation. If the Higgs boson is produced, such an analysis could be carried out at the SSC, LHC and NLC.

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4

LAVOURA, L. "MAXIMAL CP VIOLATION VIA HIGGS-BOSON EXCHANGE". International Journal of Modern Physics A 08, nr 02 (20.01.1993): 375–89. http://dx.doi.org/10.1142/s0217751x93000151.

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The unitarity of the mixing matrix of the charged Higgs bosons, and the orthogonality of the mixing matrix of the neutral Higgs bosons, are used to derive upper bounds on the values of general CP-violating expressions. The bounds are independent of the total number of Higgs fields in any specific model. They allow us to relax the usual assumption of only one Higgs boson being light. It is natural that the CP violation in the exchange of neutral Higgs bosons between bottom quarks be particularly large.

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5

FÉLIX-BELTRÁN, OLGA. "HIGGS MASSES AND COUPLING WITHIN AN EXTENSION OF THE MSSM WITH HIGGS TRIPLETS". International Journal of Modern Physics A 17, nr 04 (10.02.2002): 465–86. http://dx.doi.org/10.1142/s0217751x02005955.

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We study the properties of the Higgs sector in an extended SUSY model that includes a complex (Y=0) Higgs triplet. In particular, we evaluate the Higgs masses and their couplings to gauge bosons, including the leading radiative corrections using the one-loop effective potential. The mass difference between the CP-even and CP-odd neutral scalars, which can mimic a CP-violating Higgs signature of the MSSM, is also studied. Then, we study the range of parameters that are bounded from the LEP2 search for neutral Higgs bosons, as well as the corresponding region where at least one of the neutral CP-even Higgs boson can be detected at a future e+e- collider with a c.m. energy of 500 GeV.

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6

CHENG, HAI-YANG. "ON THE WEINBERG MODEL OF CP VIOLATION". International Journal of Modern Physics A 07, nr 06 (10.03.1992): 1059–95. http://dx.doi.org/10.1142/s0217751x92000478.

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The Weinberg three-Higgs-doublet model of CP violation and its phenomenological implications are reviewed. CP violation which arises solely from charged-Higgs-boson exchange can be accommodated in the kaon system, but it is not compatible with the constraints inferred from the neutron electric dipole moment dn and from B physics. Therefore, charged-Higgs-boson exchange cannot be the dominant source of CP violation observed in KL decays. Limits on CP violation mediated by neutral-Higgs-boson exchange are derived from the dn induced by the mechanism of Barr and Zee.

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7

LAVOURA, L. "MODELS OF CP VIOLATION EXCLUSIVELY VIA NEUTRAL-SCALAR EXCHANGE". International Journal of Modern Physics A 09, nr 11 (30.04.1994): 1873–88. http://dx.doi.org/10.1142/s0217751x94000807.

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I suggest a two-Higgs-doublet model in which CP violation is mediated only by the neutral Higgs bosons, via the mechanism of scalar-pseudoscalar mixing. In this model there is no CP violation in the exchange of either W bosons or charged Higgs bosons. The model has only two basic CP-violating quantities. I remark that other models of this kind, but with more than two Higgs doublets, may also be built.

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8

PILAFTSIS, A., i M. NOWAKOWSKI. "CP-ODD NEUTRAL HIGGS EFFECTS IN $t\bar t$ PRODUCTION". International Journal of Modern Physics A 09, nr 07 (20.03.1994): 1097–114. http://dx.doi.org/10.1142/s0217751x94000509.

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We study CP violation in the process [Formula: see text] at an e+e− TeV collider. As the source of CP violation we assume a two-Higgs doublet model with an explicitly CP- noninvariant Higgs potential. The finite width effects of the neutral Higgs boson in the subprocess reaction, [Formula: see text], give rise to CP-odd observables which can have sizeable values. CPT constraints due to final (initial) state interactions are also taken into account. Numerical estimates of the expected CP asymmetry are given.

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9

BOZ, MÜGE. "THE HIGGS MASSES AND EXPLICIT CP VIOLATION IN THE GLUINO–AXION MODEL". Modern Physics Letters A 17, nr 04 (10.02.2002): 215–30. http://dx.doi.org/10.1142/s0217732302006552.

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In this work, we address the phenomenological consequences of explicit CP violation on direct Higgs–boson searches at high energy colliders. Having a restricted parameter space, we concentrate on the recently proposed gluino–axion model, and investigate the CP violation capability of the model subject to the recent experimental data. It is shown that the Higgs masses as well as their CP compositions are quite sensitive to the supersymmetric CP phases. The lightest Higgs is found to be nearly CP even to a good approximation whilst the remaining two heavy scalars do not have definite CP parities.

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10

FERREIRA, P. M., HOWARD E. HABER, M. MANIATIS, O. NACHTMANN i JOÃO P. SILVA. "THE GEOMETRIC PICTURE OF GENERALIZED-CP AND HIGGS-FAMILY TRANSFORMATIONS IN THE TWO-HIGGS-DOUBLET MODEL". International Journal of Modern Physics A 26, nr 05 (20.02.2011): 769–808. http://dx.doi.org/10.1142/s0217751x11051494.

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In the two-Higgs-doublet model (THDM), generalized-CP transformations ([Formula: see text] where X is unitary) and unitary Higgs-family transformations (φi→Uijφj) have recently been examined in a series of papers. In terms of gauge-invariant bilinear functions of the Higgs fields φi, the Higgs-family transformations and the generalized-CP transformations possess a simple geometric description. Namely, these transformations correspond in the space of scalar-field bilinears to proper and improper rotations, respectively. In this formalism, recent results relating generalized CP transformations with Higgs-family transformations have a clear geometric interpretation. We will review what is known regarding THDM symmetries, as well as derive new results concerning those symmetries, namely how they can be interpreted geometrically as applications of several CP transformations.

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11

HE, XIAO-GANG. "CP VIOLATION". International Journal of Modern Physics A 22, nr 27 (30.10.2007): 4989–97. http://dx.doi.org/10.1142/s0217751x07038347.

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In this contribution to the Festschrift in honor of Bruce McKellar and Girish Joshi, I discuss a model proposed recently1 in which the CP violating phase in the CKM matrix is identical to the phase in the Higgs potential resulting from spontaneous CP violation.

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12

ASATRIAN, H. M., i G. K. YEGHIYAN. "HIGGS BOSON MASSES IN NMSSM WITH SPONTANEOUS CP-VIOLATION". Modern Physics Letters A 11, nr 35 (20.11.1996): 2771–85. http://dx.doi.org/10.1142/s0217732396002769.

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The Higgs boson mass problem is considered in the next-to-minimal supersymmetric standard model for the case of spontaneous CP-violation. The renormalization group equations for the gauge, Yukawa and scalar coupling constants, the effective Higgs potential and lower experimental bounds on Higgs boson and chargino masses are analyzed. The restrictions on the Higgs boson masses are found.

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13

BOZ, MÜGE. "THE HIGGS SECTOR AND ELECTRON ELECTRIC DIPOLE MOMENT IN NEXT-TO-MINIMAL SUPERSYMMETRY WITH EXPLICIT CP VIOLATION". Modern Physics Letters A 21, nr 03 (30.01.2006): 243–64. http://dx.doi.org/10.1142/s021773230601855x.

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We study the explicit CP violation of the Higgs sector in the next-to-minimal supersymmetric model with a gauge singlet Higgs field. Our numerical predictions show that electric dipole moment of electron lies around the present experimental upper limits. The mass of the lightest Higgs boson is quite sensitive to the CP violating phases in the theory. It is observed that as the vacuum expectation value of the singlet gets higher values, CP violation increases.

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14

Bian, Ligong, Ning Chen i Yun Jiang. "Higgs pair production in the CP-violating two-Higgs-doublet model". International Journal of Modern Physics A 32, nr 34 (10.12.2017): 1746002. http://dx.doi.org/10.1142/s0217751x17460022.

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The SM-like Higgs pair production is discussed in the framework of the general CP-violating two-Higgs-doublet model, where we find that the CP-violating mixing angles can be related to the Higgs self-couplings. Therefore, the future experimental searches for Higgs boson pairs can be constrained by the improved precision of the electric dipole moment measurements. Based on a series of constraints of the SM-like Higgs boson signal fits, the perturbative unitarity and stability bounds to the Higgs potential, and the most recent LHC searches for heavy Higgs bosons, we suggest a set of benchmark models for the future high-energy collider searches for Higgs pair production. The [Formula: see text] colliders operating at [Formula: see text] are capable of measuring the Higgs cubic self-couplings of the benchmark models directly. We also estimate the cross sections of the resonance contributions to the Higgs pair productions for the benchmark models at the future LHC and SppC/FCC-hh runs.

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15

Usman, Muhammad, i Asghar Qadir. "The extra scalar degrees of freedom from the two-Higgs doublet model for dark energy". International Journal of Modern Physics D 26, nr 05 (kwiecień 2017): 1741003. http://dx.doi.org/10.1142/s0218271817410036.

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In principle, a minimal extension of the standard model of Particle Physics, the two-Higgs doublet model (2HDM), can be invoked to explain the scalar field responsible for dark energy. The two doublets are in general mixed. After diagonalization, the lightest CP-even Higgs and CP-odd Higgs are jointly taken to be the dark energy candidate. The dark energy obtained from the Higgs fields in this case is indistinguishable from the cosmological constant.

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16

ZARRINKAMAR, S., H. HASSANABADI i A. A. RAJABI. "MASS TERMS IN CP-CONSERVING WEINBERG THREE-HIGGS-DOUBLET MODEL". International Journal of Modern Physics E 18, nr 08 (wrzesień 2009): 1781–84. http://dx.doi.org/10.1142/s021830130901383x.

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By applying two transformations on the vacuum expectations of the Higgs fields, we show that instead of considering three nonvanishing complex fields, one can easily work with the real parts of two fields while CP conservation is assumed. Using this result, we next obtain the mass terms of CP-conserving Weinberg three-Higgs-doublet model (3HDM) which are essential in study of the spontaneous symmetry breaking and the Higgs mechanism.

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17

DÍAZ-CRUZ, J. L., O. FÉLIX-BELTRÁN, A. ROSADO i S. ROSADO-NAVARRO. "ELECTROWEAK RIGHT-HANDED NEUTRINOS AND NEW HIGGS SIGNALS AT THE LHC". International Journal of Modern Physics A 26, nr 17 (10.07.2011): 2865–80. http://dx.doi.org/10.1142/s0217751x11053675.

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We explore some aspects of the phenomenology of the Higgs sector in a model that includes right-handed neutrinos, with a mass of the order of the electroweak scale. In this model all scales arise from spontaneous symmetry breaking, thus the Higgs sector includes an extra Higgs singlet, in addition to the Standard Model Higgs doublet. The scalar spectrum includes two neutral CP-even states (h and H, with mh < mH) and a neutral CP-odd state (σ) that can be identified as a pseudo-Majoron. The parameter of the Higgs potential are constrained using a perturbativity criteria, which amounts to solve the corresponding RGE. The relevant Higgs branching ratios and some cross-sections are discussed, with special emphasis on the detection of the invisible Higgs signal at the LHC.

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18

Heng, Zhaoxia, Lin Guo, Pengqiang Sun i Wei Wei. "Charged Higgs bosons in the NMSSM under current LHC constraints". Modern Physics Letters A 34, nr 28 (13.09.2019): 1950230. http://dx.doi.org/10.1142/s0217732319502304.

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Charged Higgs boson is a crucial prediction of new physics beyond the SM. In this work, we perform a comprehensive scan over the parameter space of NMSSM considering various experimental constraints including the direct search limits from the 13 TeV LHC, and consider the scenario that the next-to-lightest CP-even Higgs boson is SM-like. We find that the masses of charged Higgs bosons can be as light as 350 GeV, the lightest CP-even Higgs boson [Formula: see text] is predominantly singlet and can be as light as 48 GeV, and the lightest CP-odd Higgs boson [Formula: see text] is also singlet-dominated and can be as light as 82 GeV. The charged Higgs bosons mainly decay to [Formula: see text] or [Formula: see text], but the branching ratio of the exotic decays [Formula: see text] and [Formula: see text] can maximally reach 20% and 11%, respectively, which can be used to distinguish the NMSSM from MSSM. Such a heavy charged Higgs boson is inaccessible at the 13 TeV LHC with a luminosity of 36.1 fb[Formula: see text] and its detection needs higher energy and/or higher luminosity.

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19

Hollik, W. "Precision calculations for supersymmetric Higgs bosons". International Journal of Modern Physics A 30, nr 14 (14.05.2015): 1530040. http://dx.doi.org/10.1142/s0217751x15300409.

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Recent progress is presented on higher-order calculations for the mass spectrum of Higgs particles in the CP-conserving and CP-violating MSSM, covering diagrammatic two-loop calculations for neutral and charged Higgs bosons as well as all-order resummation of large logarithms arising from the strong and Yukawa coupling sectors.

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20

Bar-Shalom, S., D. Atwood i A. Soni. "Two Higgs doublet models and CP violating Higgs exchange in". Physics Letters B 419, nr 1-4 (luty 1998): 340–47. http://dx.doi.org/10.1016/s0370-2693(97)01039-3.

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21

Gurskaya, Albina, Mikhail Dolgopolov i Elza Rykova. "Restrictions on the parameters of the Minimal Supersymmetric Standard Model with CP-violation". EPJ Web of Conferences 222 (2019): 04005. http://dx.doi.org/10.1051/epjconf/201922204005.

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The minimal supersymmetric extension of the standard model with CP-violation is considered in this paper. The main area of the model parameters, which is attractive for researchers, corresponds to small values of the tangent mixing angle of two doublets Higgs fields (tanβ). The authors discuss the possibilities of the model in correlation with the data on the search for the lightest stable supersymmetric particle. The masses of neutral Higgs bosons in the basis of CP-violationwas calculated.The results are presented as dependencies neutral CP-odd Higgs boson mass mA on tanβ. At small values tgβ the mass of the lightest stable particle must be more than ∼ 250 GeV.

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22

Dick, Rainer. "Direct signals from electroweak singlets through the Higgs portal". International Journal of Modern Physics D 27, nr 16 (grudzień 2018): 1830008. http://dx.doi.org/10.1142/s0218271818300082.

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We review predictions and constraints for nuclear recoil signals from Higgs portal dark matter under the assumption of standard thermal creation from freeze-out. Thermally created scalar and vector Higgs portal dark matter masses are constrained to be in the resonance region near half the Higgs mass, [Formula: see text], or above several TeV. The resonance region for these models will be tested by XENONnT and LZ. The full mass range up to the unitarity limit can be tested by DarkSide-20k and DARWIN. Fermionic Higgs portal dark matter with a pure CP odd coupling is constrained by the Higgs decay width, but has strongly suppressed recoil cross sections which cannot be tested with upcoming experiments. Fermionic Higgs portal dark matter with a combination of CP even and odd Higgs couplings can be constrained by the direct search experiments.

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23

Demir, D. A. "Supersymmetric CP violation: higgs and flavor". Nuclear Physics B - Proceedings Supplements 101, nr 1-3 (sierpień 2001): 431–35. http://dx.doi.org/10.1016/s0920-5632(01)01529-8.

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24

Rebelo, M. N. "Multi-Higgs models and CP violation". Fortschritte der Physik 59, nr 11-12 (22.08.2011): 1050–54. http://dx.doi.org/10.1002/prop.201100077.

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25

LEE, JAE SIK. "PROBING HIGGS-SECTOR CP VIOLATION AT A PHOTON COLLIDER". Modern Physics Letters A 22, nr 17 (7.06.2007): 1191–208. http://dx.doi.org/10.1142/s0217732307023717.

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In this review we demonstrate physics potential of a photon linear collider by studying the neutral Higgs–boson sector of the MSSM in which interesting CP-violating Higgs mixing could arise via radiative corrections.

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26

Hou, George Wei-Shu. "CP Violation for the Heavens and the Earth". Universe 8, nr 4 (11.04.2022): 234. http://dx.doi.org/10.3390/universe8040234.

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Electroweak baryogenesis can be driven by the top quark in a general two Higgs doublet model with extra Yukawa couplings. Higgs quartics provide the first order phase transition, while extra top Yukawa coupling ρtt can fuel the cosmic baryon asymmetry through the λtImρtt product, with flavor-changing ρtc coupling as backup. The impressive ACME 2018 bound on the electron electric dipole moment calls for an extra electron coupling ρee for exquisite cancellation among dangerous diagrams, broadening the baryogenesis solution space. The mechanism suggests that extra Yukawa couplings echo the hierarchical structure of standard Yukawa couplings. Phenomenological consequences in the Higgs search and flavor physics are discussed, with μ and τ EDM touched upon.

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27

KIM, JIHN E., HANS PETER NILLES i MIN-SEOK SEO. "SINGLET SUPERFIELD EXTENSION OF THE MINIMAL SUPERSYMMETRIC STANDARD MODEL WITH PECCEI–QUINN SYMMETRY AND A LIGHT PSEUDOSCALAR HIGGS BOSON AT THE LHC". Modern Physics Letters A 27, nr 29 (17.09.2012): 1250166. http://dx.doi.org/10.1142/s0217732312501660.

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Motivated by the μ-problem and the axion solution to the strong CP-problem, we extend the MSSM with one more chiral singlet field X ew . The underlying PQ-symmetry allows only one more renormalizable term X ew Hu Hd in the superpotential. The spectrum of the Higgs system includes a light pseudoscalar aX (in addition to the standard CP-even Higgs boson), predominantly decaying to two photons: aX →γγ. Both Higgs bosons might be in the range accessible to current LHC experiments.

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Almarashi, Mosleh M. "Review of a Light NMSSM Pseudoscalar Higgs-State Production at the LHC". Universe 7, nr 11 (20.10.2021): 392. http://dx.doi.org/10.3390/universe7110392.

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In this paper, we briefly review the LHC discovery potential of a light pseudoscalar Higgs boson of the NMSSM, a1, produced in the gluon fusion gg→a1, bottom-quark fusion bb¯→a1 and bottom-gluon fusion bg→ba1. We also review the LHC discovery potential of the next-to-lightest CP-even Higgs boson h2 being the non-SM-like Higgs, decaying either into two light CP-odd Higgs bosons a1 or into a light a1 and the Z gauge boson through the gluon fusion gg→h2 in the 4τ final state. We find that the light a1 can be detected at the LHC in a variety of production processes including the gluon fusion, bottom-quark fusion and bottom-gluon fusion. The latter two processes require high luminosity of the LHC and large values of tanβ. We also find that the LHC has the potential to discover the non-SM-like Higgs state, h2, decaying into a pair of light CP-odd Higgses a1’s, allowing the distinguishing of the NMSSM Higgs sector from the MSSM one as such a light a1, is impossible in the latter scenario.

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29

Sun, Yi, Xian-Fu Wang i Dao-Neng Gao. "CP mixed property of the Higgs-like particle in the decay channel h→Z Z*→4l". International Journal of Modern Physics A 29, nr 15 (30.05.2014): 1450086. http://dx.doi.org/10.1142/s0217751x14500869.

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Current experiments do not support, as ATLAS and CMS Collaborations at the Large Hadron Collider reported, that the Higgs-like resonance discovered in July 2012 is a pure CP-odd state. We examine a general hZZ vertex which contains CP-even and CP-odd couplings, by studying the process [Formula: see text] with l1, l2 = e or μ, to explore the CP mixed property of the Higgs-like particle. One momentum asymmetry and two angular asymmetries have been analyzed in order to reveal the difference from different CP-couplings. Our study shows that these asymmetries could be interesting observables in the future precise experiments.

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30

BOZ, MÜGE. "THE CONSTRAINTS ON CP VIOLATING PHASES IN MODELS WITH A DYNAMICAL GLUINO PHASE". Modern Physics Letters A 19, nr 06 (28.02.2004): 433–48. http://dx.doi.org/10.1142/s0217732304013027.

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We analyze the electric dipole moment and the Higgs mass constraints on the supersymmetric model which offers dynamical solutions to the μ and strong CP problems. The trilinear coupling phases, and tan β-|μ| are strongly correlated, particularly in the low-tan β regime. Certain values of the phases of the trilinear couplings are forbidden, whereas the CP violating phase from the chargino sector is imprisoned to lie near a CP conserving point, by the Higgs mass and electric dipole moment constraints.

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31

GLADYSHEV, A. V., i D. I. KAZAKOV. "RENORMALIZATION GROUP IMPROVED RADIATIVE CORRECTIONS TO THE SUPERSYMMETRIC HIGGS BOSON MASSES". Modern Physics Letters A 10, nr 40 (28.12.1995): 3129–37. http://dx.doi.org/10.1142/s0217732395003288.

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The one-loop radiative corrections to the Higgs boson potential in the MSSM, originating from the top quark and squark loops, are summed in the leading log approximation using the renormalization group (RG). The RG improved effective potential is minimized and the corrections to the CP-odd and CP-even Higgs boson masses are calculated. The resulting masses exhibit smoother top mass dependence than those calculated without RG summation. We have also found that for preferable values of the top mass the light Higgs mass does not exceed 100 GeV.

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32

Song, You, Qi-Shu Yan i Xiao-Ran Zhao. "Cubic and Quartic Higgs Couplings of Higgs Potentials and CP Phases". Communications in Theoretical Physics 65, nr 6 (1.06.2016): 753–60. http://dx.doi.org/10.1088/0253-6102/65/6/753.

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33

Gröber, R., M. Mühlleitner i M. Spira. "Higgs pair production at NLO QCD for CP-violating Higgs sectors". Nuclear Physics B 925 (grudzień 2017): 1–27. http://dx.doi.org/10.1016/j.nuclphysb.2017.10.002.

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34

FROGGATT, C. D., R. NEVZOROV, H. B. NIELSEN i D. THOMPSON. "ON THE ORIGIN OF APPROXIMATE CUSTODIAL SYMMETRY IN THE TWO-HIGGS DOUBLET MODEL". International Journal of Modern Physics A 24, nr 30 (10.12.2009): 5587–637. http://dx.doi.org/10.1142/s0217751x09047442.

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We argue that the consistent implementation of the multiple point principle (MPP) in the general nonsupersymmetric two-Higgs doublet model (2HDM) can lead to a set of approximate global custodial symmetries that ensure CP conservation in the Higgs sector and the absence of flavor changing neutral currents (FCNC) in the considered model. In particular, the existence of a large set of degenerate vacua at some high energy scale Λ caused by the MPP can result in approximate U(1) and Z2 symmetries that suppress FCNC and CP-violating interactions in the 2HDM. We explore the renormalization group (RG) flow of the Yukawa and Higgs couplings within the MPP inspired 2HDM with approximate custodial symmetries and show that the solutions to the RG equations are focused near quasifixed points at low energies if the MPP scale Λ is relatively high. We study the Higgs spectrum and couplings near the quasifixed point at moderate values of tan β and compute a theoretical upper bound on the lightest Higgs boson mass. If Λ ≳ 1010 GeV the lightest CP-even Higgs boson is always lighter than 125 GeV. When the MPP scale is low, the mass of the lightest Higgs particle can reach 180–220 GeV while its coupling to the top quark can be significantly larger than in the SM, resulting in the enhanced production of Higgs bosons at the LHC. Other possible scenarios that appear as a result of the implementation of the MPP in the 2HDM are also discussed.

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35

Moretti, Stefano, i Shoaib Munir. "Two Higgs Bosons near 125 GeV in the Complex NMSSM and the LHC Run I Data". Advances in High Energy Physics 2015 (2015): 1–16. http://dx.doi.org/10.1155/2015/509847.

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We analyse the impact of explicit CP-violation in the Higgs sector of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) on its consistency with the Higgs boson data from the Large Hadron Collider (LHC). Through detailed scans of the parameter space of the complex NMSSM for certain fixed values of one of its CP-violating (CPV) phases, we obtain a large number of points corresponding to five phenomenologically relevant scenarios containing ∼125 GeV Higgs boson(s). We focus, in particular, on the scenarios where the visible peaks in the experimental samples can actually be explained by two nearly mass-degenerate neutral Higgs boson states. We find that some points corresponding to these scenarios give an overall slightly improved fit to the data, more so for nonzero values of the CPV phase, compared to the scenarios containing a single Higgs boson near 125 GeV.

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36

Dubinin, M. N., i E. Yu Petrova. "Scenarios with low mass Higgs bosons in the heavy supersymmetry". International Journal of Modern Physics A 33, nr 25 (10.09.2018): 1850150. http://dx.doi.org/10.1142/s0217751x18501506.

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Possible realistic scenarios are investigated in the minimal supersymmetric standard model (MSSM) Higgs sector extended by dimension-six effective operators. The CP-odd Higgs boson with low mass around 30–90 GeV could be consistently introduced in the regime of large threshold corrections to the effective MSSM two-doublet Higgs potential.

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ASATRIAN, H. M., i G. K. EGUIAN. "HIGGS BOSON MASSES IN NONMINIMAL SUPERSYMMETRY". Modern Physics Letters A 10, nr 38 (14.12.1995): 2943–54. http://dx.doi.org/10.1142/s0217732395003082.

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The Higgs boson mass problem is considered in the next-to-minimal supersymmetric standard model. The Higgs potential and the renormalization group equations for the gauge, Yukawa and scalar coupling constants are analyzed. The restrictions on the Higgs boson masses are found for the cases of presence and absence of spontaneous CP-violation.

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38

Lebedev, Oleg. "CP violation with Higgs-dependent Yukawa couplings". Physics Letters B 697, nr 1 (luty 2011): 58–62. http://dx.doi.org/10.1016/j.physletb.2011.01.048.

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Masip, Manuel, i Andrija Rašin. "CP violation in multi-Higgs supersymmetric models". Nuclear Physics B 460, nr 3 (luty 1996): 449–69. http://dx.doi.org/10.1016/0550-3213(95)00600-1.

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Skjold, Arild, i Per Osland. "Signals of CP violation in Higgs decay". Physics Letters B 329, nr 2-3 (czerwiec 1994): 305–11. http://dx.doi.org/10.1016/0370-2693(94)90777-3.

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Inagaki, T. "Dynamical CP violation in composite Higgs models". Nuclear Physics B - Proceedings Supplements 37, nr 1 (sierpień 1994): 197–202. http://dx.doi.org/10.1016/0920-5632(94)90750-1.

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GHOSAL, AMBAR, ASIM K. RAY i SASWATI SARKAR. "SPONTANEOUS CP VIOLATION IN A TWO-GENERATION LEFT-RIGHT SYMMETRIC MODEL WITH TWO HIGGS BI-DOUBLETS". Modern Physics Letters A 07, nr 34 (10.11.1992): 3179–86. http://dx.doi.org/10.1142/s0217732392002561.

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We discuss a two-generation left-right symmetric model with two Higgs bi-doublets and a discrete symmetry to show that spontaneous CP violation arises as a result of soft breaking of the discrete symmetry. The contributions to the CP violation parameter ε in the [Formula: see text] transition come from the box diagrams due to WL-WR exchanges as well as from the mixing of the real and imaginary parts of the flavor changing neutral Higgs at the tree level and both contributions depend on the relative phase difference between the vacuum expectation values (vevs) of the relevant neutral Higgs scalars. Other CP violating effects in the model are consistent with their experimental values for the appropriate choice of the model parameters. The extension of the model to the realistic case of three generations of fermions does not appreciably change the phenomenology of the model.

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NAUMANN, N. AXEL. "A SEARCH FOR NEUTRAL HIGGS BOSONS AT HIGH tan β WITH THE DØ DETECTOR". International Journal of Modern Physics A 20, nr 15 (20.06.2005): 3311–13. http://dx.doi.org/10.1142/s0217751x0502642x.

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Many models of Electro-Weak symmetry breaking predict two Higgs doublets, and thus five Higgs bosons, three of which are neutral (h, H, A). The Minimal Supersymmetric extension of the Standard Model (MSSM) predicts the coupling of the bottom quark to the CP-odd scalar A to vary as tan β. The sum of the production of the CP-even scalars, h and H, is also proportional to tan 2 β. After searching for neutral Higgs bosons in multi-jet events containing three or more bottom-quark jets collected at the Tevatron by the DØ detector during Run II, we can exclude tan β > 80 – 120 for 90 GeV < mA < 150 GeV.

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44

Rong, Li, i Zhang Ying. "Combined Analysis of CP Properties of Higgs Boson in Effective Higgs Lagrangian". Communications in Theoretical Physics 65, nr 1 (1.01.2016): 46–52. http://dx.doi.org/10.1088/0253-6102/65/1/46.

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Hung, Ha Thanh, Le Tho Hue, Nguyen Thi Thu Hang i Pham Ngoc Thu. "Mass of the Lightest Neutral CP-even Higgs in the Supersymmetric Minimal Reduced 3-3-1 Mode". Communications in Physics 24, nr 3 (9.07.2014): 201. http://dx.doi.org/10.15625/0868-3166/24/3/3817.

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We calculate the mass of the lightest neutral CP-even Higgs in the frame work of the supersymmetric reduced minimal 3-3-1 model (SUSYRM331) at one-loop level. Like MSSM, at tree level this value of mass is smaller than that of \(m_Z=92\) GeV, inconsistent with value of 125 GeV measured by recent experiment. In this work we prove that the mass of the lightest neutral CP-even Higgs will get the consistent value if loop corrections are included.

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46

Asakawa, E., A. Sugamoto i I. Watanabe. "Production of CP-even and CP-odd Higgs bosons at muon colliders". European Physical Journal C 17, nr 2 (październik 2000): 279–84. http://dx.doi.org/10.1007/s100520000454.

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MACHET, B. "MASS MATRICES AND EIGENSTATES FOR SCALARS/PSEUDOSCALARS: INDIRECT CP VIOLATION, MASS HIERARCHIES AND SYMMETRY BREAKING". International Journal of Modern Physics A 17, nr 27 (30.10.2002): 3839–74. http://dx.doi.org/10.1142/s0217751x02009965.

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I study indirect CP violation for neutral kaons, and extend it to large values of the CP-violating parameter (taken to be real). I show how and at which condition there can exist a continuous set of basis in which the kinetic and mass terms in the Lagrangian can be diagonalized simultaneously. An ambiguity results for the mass spectrum, which then depends on the basis. In particular, for fixed (positive) (mass)2 of the CP eigenstates [Formula: see text], and for certain ranges of values of the CP-violating parameter, a negative (mass)2 can arise in the CP-violating basis. Under certain conditions, even a small perturbation, lifting the ambiguity, can drastically affect the pattern of masses. These investigations extend in a natural way to indirect CP violation among a set of Higgs-like doublets. The C-odd commutator [Formula: see text], or its equivalent for Higgs multiplets, plays an important role. The condition for its vanishing and its consequences are among the main concerns of this work.

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Zhao, Shu-Min, Xi Wang, Xing-Xing Dong, Hai-Bin Zhang i Tai-Fu Feng. "A Study of the Higgs Mass with the Effective Potential and Higgs Decays in the U(1)XSSM". Symmetry 14, nr 10 (14.10.2022): 2153. http://dx.doi.org/10.3390/sym14102153.

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As the U(1) extension of the minimal supersymmetric standard model, the U(1)XSSM has new superfields, such as right-handed neutrinos, and three Higgs singlets. In the U(1)XSSM, the lightest CP-even Higgs mass mh0 is studied by using the Higgs effective potential with one-loop corrections. We also calculate the Higgs decays h0→γγ, h0→VV(V=W,Z), h0→ll¯Z, and h0→νν¯Z. The obtained results are reasonable, and they are in favor of the study of the Higgs characteristic and the phenomenology of the U(1)XSSM.

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RIOTTO, ANTONIO. "MORE ABOUT ELECTROWEAK BARYOGENESIS IN THE MINIMAL SUPERSYMMETRIC STANDARD MODEL". International Journal of Modern Physics D 07, nr 05 (październik 1998): 815–23. http://dx.doi.org/10.1142/s0218271898000541.

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We compute the baryon asymmetry generated at the electroweak phase transition by the Higgs scalar sector of the minimal supersymmetric standard model. Because of large enhancement effects from low momentum modes, Higgs particles may be responsible for the observed baryon asymmetry even though CP-violation in the Higgs sector only appears at the one-loop level. We also discuss the approximations made in the analysis and suggest possible improvements.

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50

WU, YUE-LIANG, i YU-FENG ZHOU. "A TWO HIGGS BI-DOUBLET LEFT-RIGHT MODEL WITH SPONTANEOUS CP VIOLATION". International Journal of Modern Physics A 23, nr 21 (20.08.2008): 3304–8. http://dx.doi.org/10.1142/s0217751x0804202x.

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We discuss a left-right symmetric model with two Higgs bi-doublet and spontaneous P and CP violation. The flavor changing neutral currents is suppressed by assuming approximate global U(1) family symmetry. We calculate the constraints from neural K meson mass difference ΔmK and demonstrate that a right-handed gauge boson W2 contribution in box-diagrams with mass around 600 GeV is allowed due to a negative interference with a light charged Higgs boson around 150 ~ 300 GeV. The W2 contribution to ɛK is suppressed from appropriate choice of additional CP phases appearing in the right-handed Cabbibo-Kobayashi-Maskawa(CKM) matrix. The model is found fully consistent with B0 mass difference and the mixing-induced CP asymmetry measurements.

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