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Статті в журналах з теми "Mono-Higgs"

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Автор: Grafiati

Опубліковано: 6 вересня 2023

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1

Basso, Lorenzo. "Resonant mono Higgs at the LHC." Journal of High Energy Physics 2016, no. 4 (April 2016): 1–20. http://dx.doi.org/10.1007/jhep04(2016)087.

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2

Antusch, Stefan, Eros Cazzato, and Oliver Fischer. "Higgs production through sterile neutrinos." International Journal of Modern Physics A 31, no. 33 (November 22, 2016): 1644007. http://dx.doi.org/10.1142/s0217751x16440073.

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Анотація:

In scenarios with sterile (right-handed) neutrinos with an approximate “lepton-number-like” symmetry, the heavy neutrinos (the mass eigenstates) can have masses around the electroweak scale and couple to the Higgs boson with, in principle, unsuppressed Yukawa couplings, while the smallness of the light neutrinos’ masses is guaranteed by the approximate symmetry. The on-shell production of the heavy neutrinos at lepton colliders, together with their subsequent decays into a light neutrino and a Higgs boson, constitutes a resonant contribution to the Higgs production mechanism. This resonant mono-Higgs production mechanism can contribute significantly to the mono-Higgs observables at future lepton colliders. A dedicated search for the heavy neutrinos in this channel exhibits sensitivities for the electron neutrino Yukawa coupling as small as [Formula: see text]. Furthermore, the sensitivity is enhanced for higher center-of-mass energies, when identical integrated luminosities are considered.

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3

Ghorbani, Karim, and Leila Khalkhali. "Mono-Higgs signature in a fermionic dark matter model." Journal of Physics G: Nuclear and Particle Physics 44, no. 10 (August 30, 2017): 105004. http://dx.doi.org/10.1088/1361-6471/aa823a.

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4

Petrov, Alexey A., and William Shepherd. "Searching for dark matter at LHC with mono-Higgs production." Physics Letters B 730 (March 2014): 178–83. http://dx.doi.org/10.1016/j.physletb.2014.01.051.

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5

Bernreuther, Elias, Jan Horak, Tilman Plehn, and Anja Butter. "Actual Physics behind Mono-X." SciPost Physics 5, no. 4 (October 17, 2018). http://dx.doi.org/10.21468/scipostphys.5.4.034.

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Mono-X searches are standard dark matter search strategies at the LHC. First, we show how in the case of initial state radiation they essentially collapse to mono-jet searches. Second, we systematically study mono-X signatures from decays of heavier dark matter states. Direct detection constraints strongly limit our MSSM expectations, but largely vanish for mono-Z and mono-Higgs signals once we include light NMSSM mediators. Finally, the decay topology motivates mono-W-pair and mono-Higgs-pair searches, strengthening and complementing their mono-X counterparts.

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6

Bhowmik, Debabrata, Jayita Lahiri, Satyaki Bhattacharya, Biswarup Mukhopadhyaya, and Ritesh K. Singh. "The mono-Higgs + MET signal at the Large Hadron Collider: a study on the $$\gamma \gamma $$ and $$b\bar{b}$$ final states." European Physical Journal C 82, no. 10 (October 14, 2022). http://dx.doi.org/10.1140/epjc/s10052-022-10828-6.

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AbstractWe investigate the potential of the channel mono-Higgs + missing transverse energy (MET) in yielding signals of dark matter at the high-luminosity Large Hadron Collider (LHC). As illustration, a Higgs-portal scenario has been chosen, where an extension of the Standard Model with a real scalar gauge-singlet which serves as a dark matter candidate. The phenomenological viability of this scenario has been ensured by postulating the existence of dimension-6 operators that enable cancellation in certain amplitudes for elastic scattering of dark matter in direct search experiments. These operators are found to have non-negligible contribution to the mono-Higgs signal. Thereafter, we carry out a detailed analysis of this signal, with the accompanying MET providing a useful handle in suppressing backgrounds. Signals for the Higgs decaying into both the diphoton and $$b{\bar{b}}$$ b b ¯ channels have been studied. A cut-based simulation is presented first, optimizing over various event selection criteria. This is followed by a demonstration of how the statistical significance can be improved through analyses based on boosted decision trees and artificial neural networks.

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7

Berlin, Asher, Tongyan Lin, and Lian-Tao Wang. "Mono-Higgs detection of dark matter at the LHC." Journal of High Energy Physics 2014, no. 6 (June 2014). http://dx.doi.org/10.1007/jhep06(2014)078.

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8

Baum, Sebastian, Katherine Freese, Nausheen R. Shah, and Bibhushan Shakya. "NMSSM Higgs boson search strategies at the LHC and the mono-Higgs signature in particular." Physical Review D 95, no. 11 (June 29, 2017). http://dx.doi.org/10.1103/physrevd.95.115036.

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9

Carpenter, Linda, Anthony DiFranzo, Michael Mulhearn, Chase Shimmin, Sean Tulin, and Daniel Whiteson. "Mono-Higgs-boson: A new collider probe of dark matter." Physical Review D 89, no. 7 (April 29, 2014). http://dx.doi.org/10.1103/physrevd.89.075017.

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10

Jueid, Adil, Salah Nasri, and Rachik Soualah. "Searching for GeV-scale Majorana Dark Matter: inter spem et metum." Journal of High Energy Physics 2021, no. 4 (April 2021). http://dx.doi.org/10.1007/jhep04(2021)012.

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Abstract We suggest a minimal model for GeV-scale Majorana Dark Matter (DM) coupled to the standard model lepton sector via a charged scalar singlet. We show that there is an anti-correlation between the spin-independent DM-Nucleus scattering cross section (σSI) and the DM relic density for parameters values allowed by various theoretical and experimental constraints. Moreover, we find that even when DM couplings are of order unity, σSI is below the current experimental bound but above the neutrino floor. Furthermore, we show that the considered model can be probed at high energy lepton colliders using e.g. the mono-Higgs production and same-sign charged Higgs pair production.

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11

Ahriche, Amine, Abdesslam Arhrib, Adil Jueid, Salah Nasri, and Alejandro de la Puente. "Mono-Higgs signature in the scotogenic model with Majorana dark matter." Physical Review D 101, no. 3 (February 27, 2020). http://dx.doi.org/10.1103/physrevd.101.035038.

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12

No, Jose Miguel. "Looking through the pseudoscalar portal into dark matter: Novel mono-Higgs and mono-Zsignatures at the LHC." Physical Review D 93, no. 3 (February 5, 2016). http://dx.doi.org/10.1103/physrevd.93.031701.

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13

Bahl, Henning, Victor Martin Lozano, and Georg Weiglein. "Simplified models for resonant neutral scalar production with missing transverse energy final states." Journal of High Energy Physics 2022, no. 11 (November 9, 2022). http://dx.doi.org/10.1007/jhep11(2022)042.

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Abstract Additional Higgs bosons appear in many extensions of the Standard Model (SM). While most existing searches for additional Higgs bosons concentrate on final states consisting of SM particles, final states containing beyond the SM (BSM) particles play an important role in many BSM models. In order to facilitate future searches for such final states, we develop a simplified model framework for heavy Higgs boson decays to a massive SM boson as well as one or more invisible particles. Allowing one kind of BSM mediator in each decay chain, we classify the possible decay topologies for each final state, taking into account all different possibilities for the spin of the mediator and the invisible particles. Our comparison of the kinematic distributions for each possible model realization reveals that the distributions corresponding to the different simplified model topologies are only mildly affected by the different spin hypotheses, while there is significant sensitivity for distinguishing between the different decay topologies. As a consequence, we point out that expressing the results of experimental searches in terms of the proposed simplified model topologies will allow one to constrain wide classes of different BSM models. The application of the proposed simplified model framework is explicitly demonstrated for the example of a mono-Higgs search. For each of the simplified models that are proposed in this paper we provide all necessary ingredients for performing Monte-Carlo simulations such that they can readily be applied in experimental analyses.

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14

Hammad, A., S. Khalil, and S. Moretti. "Search for mono-Higgs signals in bb¯ final states using deep neural networks." Physical Review D 107, no. 7 (April 24, 2023). http://dx.doi.org/10.1103/physrevd.107.075027.

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15

Banerjee, Shankha, Geneviève Bélanger, Disha Bhatia, Benjamin Fuks, and Sreerup Raychaudhuri. "Phenomenological analysis of multi-pseudoscalar mediated dark matter models." Journal of High Energy Physics 2022, no. 7 (July 2022). http://dx.doi.org/10.1007/jhep07(2022)111.

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Abstract Non-minimal simplified extensions of the Standard Model have gained considerable currency in the context of dark matter searches at the LHC, since they predict enhanced mono-Higgs and mono-W/Z signatures over large parts of the parameter space. However, these non-minimal models obviously lack the simplicity and directness of the original simplified models, and are more heavily dependent on the model assumptions. We propose to classify these models generically on the basis of additional mediator(s) and dark matter particles. As an example, we take up a scenario involving multiple pseudoscalar mediators, and a single Dirac dark matter particle, the latter being a popular introduction to ensure ultraviolet completion of theories with multiple pseudoscalar fields. In the chosen scenario, we discuss the viable channels and signatures of relevance at the future runs of the LHC. These are then compared with the minimal simplified scenarios and distinguishing features are pinpointed.

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16

Abdallah, W., A. Hammad, S. Khalil, and S. Moretti. "Search for mono-Higgs signals at the LHC in the B−L supersymmetric standard model." Physical Review D 95, no. 5 (March 21, 2017). http://dx.doi.org/10.1103/physrevd.95.055019.

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17

Chakraborty, Indrani, Dilip Kumar Ghosh, Nivedita Ghosh, and Santosh Kumar Rai. "Dark Matter and Collider Searches in $$S_3$$-Symmetric 2HDM with Vector Like Lepton." European Physical Journal C 81, no. 7 (July 2021). http://dx.doi.org/10.1140/epjc/s10052-021-09446-5.

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AbstractWe study the $$S_3$$ S 3 -symmetric two Higgs doublet model by adding two generations of vector like leptons (VLL) which are odd under a discrete $$Z_2$$ Z 2 -symmetry. The lightest neutral component of the VLL acts as a dark matter (DM) whereas the full VLL set belongs to a dark sector with no mixings allowed with the standard model fermions. We analyse the model in light of dark matter and collider searches. We show that the DM is compatible with the current relic density data as well as satisfying all direct and indirect dark matter search constraints. We choose some representative points in the model parameter space allowed by all aforementioned dark matter constraints and present a detailed collider analysis of multi-lepton signals viz. the mono-lepton, di-lepton, tri-lepton and four-lepton along with missing transverse energy in the final state using both the cut-based analysis and multivariate analysis respectively at the high luminosity 14 TeV LHC run.

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18

Ávila, Ivania M., Valentina De Romeri, Laura Duarte, and José W. F. Valle. "Phenomenology of scotogenic scalar dark matter." European Physical Journal C 80, no. 10 (October 2020). http://dx.doi.org/10.1140/epjc/s10052-020-08480-z.

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AbstractWe reexamine the minimal Singlet $$+$$ + Triplet Scotogenic Model, where dark matter is the mediator of neutrino mass generation. We assume it to be a scalar WIMP, whose stability follows from the same $${\mathbb {Z}}_{2}$$ Z 2 symmetry that leads to the radiative origin of neutrino masses. The scheme is the minimal one that allows for solar and atmospheric mass scales to be generated. We perform a full numerical analysis of the signatures expected at dark matter as well as collider experiments. We identify parameter regions where dark matter predictions agree with theoretical and experimental constraints, such as neutrino oscillations, Higgs data, dark matter relic abundance and direct detection searches. We also present forecasts for near future direct and indirect detection experiments. These will further probe the parameter space. Finally, we explore collider signatures associated with the mono-jet channel at the LHC, highlighting the existence of a viable light dark matter mass range.

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19

Chakraborty, Indrani, Dilip Kumar Ghosh, Nivedita Ghosh, and Santosh Kumar Rai. "Signals for vector-like leptons in an $$S_3$$-symmetric 2HDM at ILC." European Physical Journal C 82, no. 6 (June 2022). http://dx.doi.org/10.1140/epjc/s10052-022-10477-9.

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AbstractIn this work, we explore the signals of an $$S_3$$ S 3 -symmetric two Higgs doublet model with two generations of vector-like leptons (VLLs) at the proposed International Linear Collider (ILC). The lightest neutral component of the VLL in this model provides a viable dark matter (DM) candidate satisfying the current relic density data as well as circumventing all direct and indirect DM search constraints. Some representative benchmark points have been selected with low, medium and high DM masses, satisfying all theoretical and experimental constraints of the model and constraints coming from the DM sector. The VLLs (both neutral and charged) will be produced in pair leading to multi-lepton and multi-jet final states. We show that the ILC will prove to be a much more efficient and useful machine to hunt for such signals compared to LHC. Using traditional cut-based analysis as well as sophisticated multivariate analysis, we perform a detailed analysis of some promising channels containing mono-lepton plus di-jet, di-lepton, four-lepton and four jets along with missing transverse energy in the final state at 1 TeV ILC.

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20

Jangid, Shilpa, and Priyotosh Bandyopadhyay. "Distinguishing inert Higgs doublet and inert triplet scenarios." European Physical Journal C 80, no. 8 (August 2020). http://dx.doi.org/10.1140/epjc/s10052-020-8271-5.

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Abstract In this article we consider a comparative study between Type-I 2HDM and $$Y=0$$Y=0, SU(2) triplet extensions having one $$Z_2$$Z2-odd doublet and triplet that render the desired dark matter(DM). For the inert doublet model (IDM) either a neutral scalar or pseudoscalar can be the DM, whereas for inert triplet model (ITM) it is a CP-even scalar. The bounds from perturbativity and vacuum stability are studied for both the scenarios by calculating the two-loop beta functions. While the quartic couplings are restricted to $$0.1-0.2$$0.1-0.2 for a Planck scale perturbativity for IDM, these are much relaxed (0.8 ) for ITM. The RG-improved potentials by Coleman-Weinberg show the regions of stability, meta-stability and instability of the electroweak vacuum. The constraints coming from DM relic, the direct and indirect experiments like XENON1T, LUX and H.E.S.S., Fermi-LAT allow the DM mass $$\gtrsim 700, \,1176$$≳700,1176 GeV for IDM, ITM respectively. Though mass-splitting among $$Z_2$$Z2-odd particles in IDM is a possibility for ITM we have to rely on loop-corrections. The phenomenological signatures at the LHC show that the mono-lepton plus missing energy with prompt and displaced decays in the case of IDM and ITM can distinguish such scenarios at the LHC along with other complementary modes.

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