Log in

Relevant bibliographies by topics / Minimal Supergravity (mSUGRA) Model / Journal articles

To see the other types of publications on this topic, follow the link: Minimal Supergravity (mSUGRA) Model.

Journal articles on the topic 'Minimal Supergravity (mSUGRA) Model'

Author: Grafiati

Published: 7 September 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Minimal Supergravity (mSUGRA) Model.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

ZOU, WENJUAN, та ZHENJUN XIAO. "B→Kπ DECAYS IN THE GENERAL AND THE CONSTRAINED MINIMAL SUPERGRAVITY MODEL". Modern Physics Letters A 22, № 05 (2007): 355–66. http://dx.doi.org/10.1142/s0217732307021184.

Full text

Abstract:

In this paper, we calculated the supersymmetric contributions to the branching ratios and CP-violating asymmetries of the four B→Kπ decays in both the general and the constrained minimal supergravity (mSUGRA) model. Within the considered parameter space, we found that (a) the phase ϕμin the general mSUGRA model is strongly constrained by the data of the electron and neutron electric dipole moment and the data of B→Xsγ decay: ϕμ<0.1 (<10-3) for the case of small (large) tan β, but no limit on the phase ϕAcan be derived from the above data; (b) in both the general and the constrained mSUGRA model, the SUSY contributions are not large enough to explain the observed B→Kπ puzzle.

APA, Harvard, Vancouver, ISO, and other styles

2

Xiao, Zhen-Jun, and Wenjuan Zou. "B → M1M2 DECAYS AND NEW PHYSICS EFFECTS IN THE mSUGRA MODEL." International Journal of Modern Physics A 22, no. 31 (2007): 5997–6010. http://dx.doi.org/10.1142/s0217751x07039183.

Full text

Abstract:

By employing the QCD factorization approach, we calculated the new physics contributions to the two-body charmless hadronic decays B → M1M2 (Mi refers to light pseudo-scalar or vector light mesons) in the minimal supergravity (mSUGRA) model. In this talk we present the major numerical results and phenomenological discussions about these eighty decay channels.

APA, Harvard, Vancouver, ISO, and other styles

3

Wang, Fei, Wenyu Wang, Jinmin Yang, Yang Zhang, and Bin Zhu. "Low Energy Supersymmetry Confronted with Current Experiments: An Overview." Universe 8, no. 3 (2022): 178. http://dx.doi.org/10.3390/universe8030178.

Full text

Abstract:

This study provides a brief overview of low energy supersymmetry (SUSY) in light of current experimental constraints, such as collider searches, dark matter searches, and muon g−2 measurements. In addition, we survey a variety of low energy supersymmetric models: the phenomenological minimal supersymmetric model (MSSM); the supersymmetric models with cut-off-scale boundary conditions, i.e., the minimal supergravity (mSUGRA) or the constrained MSSM (CMSSM), the gauge mediation of SUSY breaking (GMSB), and the anomaly mediation of SUSY breaking (AMSB), as well as their extensions. The conclusion is that the low energy SUSY can survive all current experimental constraints and remains compelling, albeit suffering from a slight fine-tuning problem. The advanced models such as mSUGRA, GMSB, and AMSB need to be extended if the muon g−2 anomaly comes from new physics.

APA, Harvard, Vancouver, ISO, and other styles

4

Núñez, Darío, Jesús Zavala, Lukas Nellen, Roberto A. Sussman, Luis G. Cabral-Rosetti, and Myriam Mondragón. "Constraining the mSUGRA (minimal supergravity) parameter space using the entropy of dark matter halos." Journal of Cosmology and Astroparticle Physics 2008, no. 05 (2008): 003. http://dx.doi.org/10.1088/1475-7516/2008/05/003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

MAXIN, JAMES, VAN E. MAYES, and D. V. NANOPOULOS. "THE ONE-PARAMETER MODEL AT LHC." Modern Physics Letters A 26, no. 02 (2011): 87–100. http://dx.doi.org/10.1142/s0217732311034645.

Full text

Abstract:

No-scale supergravity is a framework where it is possible to naturally explain radiative electroweak symmetry breaking and correlate it with the effective SUSY breaking scale. Many string compactifications have a classical no-scale structure, resulting in a one-parameter model (OPM) for the supersymmetry breaking soft terms, which results in a highly constrained subset of mSUGRA. We investigate the allowed supersymmetry parameter space for a generic one-parameter model taking into account the most recent experimental constraints. We also survey the possible signatures which may be observable at the Large Hadron Collider (LHC). Finally, we compare collider signatures of OPM to those from a model with non-universal soft terms, in particular those of an intersecting D6-brane model.

APA, Harvard, Vancouver, ISO, and other styles

6

Gunion, J. F., Douglas W. McKay, and H. Pois. "Minimal four-family supergravity model." Physical Review D 53, no. 3 (1996): 1616–47. http://dx.doi.org/10.1103/physrevd.53.1616.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Djouadi, Abdelhak, Manuel Drees, and Jean-Loic Kneur. "Updated constraints on the minimal supergravity model." Journal of High Energy Physics 2006, no. 03 (2006): 033. http://dx.doi.org/10.1088/1126-6708/2006/03/033.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Baer, Howard, Csaba Balázs, Alexander Belyaev, J. Kenichi Mizukoshi, Xerxes Tata, and Yili Wang. "Updated Constraints on the Minimal Supergravity Model." Journal of High Energy Physics 2002, no. 07 (2002): 050. http://dx.doi.org/10.1088/1126-6708/2002/07/050.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Goto, Toru, Yasuhiro Okada, Yasuhiro Shimizu, and Minoru Tanaka. "b→sll¯in the minimal supergravity model." Physical Review D 55, no. 7 (1997): 4273–89. http://dx.doi.org/10.1103/physrevd.55.4273.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Baer, Howard, та Michal Brhlik. "QCD-improvedb→sγconstraints on the minimal supergravity model". Physical Review D 55, № 5 (1997): 3201–8. http://dx.doi.org/10.1103/physrevd.55.3201.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Barger, Vernon, and Chung Kao. "Neutralino relic density in the minimal supergravity model." Physics Reports 307, no. 1-4 (1998): 207–14. http://dx.doi.org/10.1016/s0370-1573(98)00062-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Majerotto, W., and B. M�sslacher. "On the parameters of the minimal supergravity model." Zeitschrift f�r Physik C Particles and Fields 48, no. 2 (1990): 273–78. http://dx.doi.org/10.1007/bf01554475.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Lopez, Jorge L., D. V. Nanopoulos, and A. Zichichi. "Troubles with the minimal SU(5) supergravity model." Physics Letters B 291, no. 3 (1992): 255–62. http://dx.doi.org/10.1016/0370-2693(92)91041-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Baer, Howard, Michal Brhlik, and Diego Castaño. "Constraints on the minimal supergravity model from nonstandard vacua." Physical Review D 54, no. 11 (1996): 6944–56. http://dx.doi.org/10.1103/physrevd.54.6944.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Brax, Philippe, and Jérôme Martin. "The supergravity quintessence model coupled to the minimal supersymmetric standard model." Journal of Cosmology and Astroparticle Physics 2006, no. 11 (2006): 008. http://dx.doi.org/10.1088/1475-7516/2006/11/008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

BECCARIA, M., G. MACORINI, E. MIRABELLA, L. PANIZZI, F. M. RENARD, and C. VERZEGNASSI. "ONE-LOOP ELECTROWEAK EFFECTS ON STOP-CHARGINO PRODUCTION AT LHC." International Journal of Modern Physics A 24, no. 30 (2009): 5539–59. http://dx.doi.org/10.1142/s0217751x09047454.

Full text

Abstract:

The process of stop-chargino production at LHC has been calculated in the Minimal Supersymmetric Standard Model at the complete electroweak one-loop level, assuming a mSUGRA symmetry breaking scheme. Several properties of the angular and invariant mass distributions of the basic [Formula: see text] amplitudes have been derived. For a meaningful collection of different benchmark points the overall electroweak one-loop effects are at most of the order of a few percent. At the realistically expected LHC accuracy, the main supersymmetric electroweak features of the process can be therefore essentially derived in this theoretical scheme from the simple Born level expressions.

APA, Harvard, Vancouver, ISO, and other styles

17

Baer, Howard, Andrew D. Box, and Heaya Summy. "Mainly axion cold dark matter in the minimal supergravity model." Journal of High Energy Physics 2009, no. 08 (2009): 080. http://dx.doi.org/10.1088/1126-6708/2009/08/080.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Goto, Toru, Takeshi Nihei та Yasuhiro Okada. "Erratum:B0−B¯0mixing and theεKparameter in the minimal supergravity model". Physical Review D 54, № 9 (1996): 5904. http://dx.doi.org/10.1103/physrevd.54.5904.3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Paucar, M. G. "Long-lived charged sleptons in the minimal supergravity standard model." Physics of Atomic Nuclei 71, no. 4 (2008): 695–700. http://dx.doi.org/10.1134/s1063778808040091.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Wu, Jizhi, Richard Arnowitt та Pran Nath. "Constraints on the minimal supergravity model from theb→sγ decay". Physical Review D 51, № 3 (1995): 1371–76. http://dx.doi.org/10.1103/physrevd.51.1371.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Goto, Toru, Takeshi Nihei та Yasuhiro Okada. "B0-B¯0mixing and theεKparameter in the minimal supergravity model". Physical Review D 53, № 9 (1996): 5233–43. http://dx.doi.org/10.1103/physrevd.53.5233.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Quirós, M., G. L. Kane, and H. E. Haber. "A non-minimal supergravity model consistent with all experimental constraints." Nuclear Physics B 273, no. 2 (1986): 333–65. http://dx.doi.org/10.1016/0550-3213(86)90250-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

AYDIN, C. "THE ANAPOLE MOMENT OF DIRAC NEUTRINOS IN LEFT–RIGHT SYMMETRIC MODEL AND IN MINIMAL SUPERSYMMETRIC MODEL." Modern Physics Letters A 16, no. 28 (2001): 1823–28. http://dx.doi.org/10.1142/s0217732301005114.

Full text

Abstract:

The static parity-violating coupling of Dirac neutrino to an external electromagnetic field is calculated in the SU (2) L × SU (2) R × U (1) left–right model and in the N=1 broken supergravity model (MSSM).

APA, Harvard, Vancouver, ISO, and other styles

24

JOAQUIM, F. R., I. MASINA, and A. RIOTTO. "OBSERVABLE ELECTRON EDM AND LEPTOGENESIS." International Journal of Modern Physics A 22, no. 32 (2007): 6253–78. http://dx.doi.org/10.1142/s0217751x0703844x.

Full text

Abstract:

In the context of the minimal supersymmetric seesaw model, the CP-violating neutrino Yukawa couplings might induce an electron electric dipole moment (EDM). The same interactions may also be responsible for the generation of the observed baryon asymmetry of the universe via leptogenesis. In the framework of mSUGRA, we identify in a model-independent way those patterns within the seesaw models which predict, barring unnatural cancelations, an electron EDM at a level probed by planned laboratory experiments and show that negative searches on τ→eγ decay may provide the strongest upper bound on the electron EDM. We also conclude that a possible future detection of the electron EDM is incompatible with thermal leptogenesis, even when flavor effects are accounted for.

APA, Harvard, Vancouver, ISO, and other styles

25

Ozkan, Mehmet, and Yi Pang. "R n extension of the Starobinsky model in old minimal supergravity." Classical and Quantum Gravity 31, no. 20 (2014): 205004. http://dx.doi.org/10.1088/0264-9381/31/20/205004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

AKULA, SUJEET, DANIEL FELDMAN, ZUOWEI LIU, PRAN NATH, and GREGORY PEIM. "NEW CONSTRAINTS ON DARK MATTER FROM CMS AND ATLAS DATA." Modern Physics Letters A 26, no. 21 (2011): 1521–35. http://dx.doi.org/10.1142/s0217732311036292.

Full text

Abstract:

Constraints on dark matter from the first CMS and ATLAS SUSY searches are investigated. It is shown that within the minimal supergravity model, the early search for supersymmetry at the LHC has depleted a large portion of the signature space in dark matter direct detection experiments. In particular, the prospects for detecting signals of dark matter in the XENON and CDMS experiments are significantly affected in the low neutralino mass region. Here the relic density of dark matter typically arises from slepton coannihilations in the early universe. In contrast, it is found that the CMS and ATLAS analyses leave untouched the Higgs pole and the Hyperbolic Branch/Focus Point regions, which are now being probed by the most recent XENON results. Analysis is also done for supergravity models with non-universal soft breaking where one finds that a part of the dark matter signature space depleted by the CMS and ATLAS cuts in the minimal SUGRA case is repopulated. Thus, observation of dark matter in the LHC depleted region of minimal supergravity may indicate non-universalities in soft breaking.

APA, Harvard, Vancouver, ISO, and other styles

27

Nath, Pran, Jizhi Wu, and Richard Arnowitt. "Landau pole effects and the parameter space of the minimal supergravity model." Physical Review D 52, no. 7 (1995): 4169–77. http://dx.doi.org/10.1103/physrevd.52.4169.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Klemm, A. O., and M. G. Schmidt. "The neutralinos of theSU(N,1) minimal supergravity model and standard cosmology." Zeitschrift für Physik C Particles and Fields 40, no. 4 (1988): 591–98. http://dx.doi.org/10.1007/bf01560230.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Lopez, Jorge L., D. V. Nanopoulos, and H. Pois. "Proton decay and cosmology strongly constrain the minimal SU(5) supergravity model." Physical Review D 47, no. 6 (1993): 2468–73. http://dx.doi.org/10.1103/physrevd.47.2468.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

CREUTZIG, THOMAS, YASUAKI HIKIDA, and PETER B. RØNNE. "HIGHER SPIN AdS3 SUPERGRAVITY AND ITS CFT DUAL." International Journal of Modern Physics: Conference Series 21 (January 2013): 163–64. http://dx.doi.org/10.1142/s2010194513009628.

Full text

Abstract:

Gravity, itself a gauge theory of a spin 2 field, can be extended to a higher spin gauge theory on AdS spaces. Recently, Gaberdiel and Gopakumar conjectured that a large N limit of a 2d minimal model is dual to a bosonic subsector of a higher spin supergravity theory on 3d AdS space. We propose and test the untruncated supersymmetric version of this conjecture where the dual CFT is a large N limit of the [Formula: see text] CP N Kazama-Suzuki model.

APA, Harvard, Vancouver, ISO, and other styles

31

ALVAREZ-GAUMÉ, L., H. ITOYAMA, J. L. MAÑES, and A. ZADRA. "SUPERLOOP EQUATIONS AND TWO-DIMENSIONAL SUPERGRAVITY." International Journal of Modern Physics A 07, no. 21 (1992): 5337–67. http://dx.doi.org/10.1142/s0217751x92002441.

Full text

Abstract:

We propose a discrete model whose continuum limit reproduces the string susceptibility and the scaling dimensions of (2, 4m) minimal superconformal models coupled to 2D supergravity. The basic assumption in our presentation is a set of super-Virasoro constraints imposed on the partition function. We recover the Neveu-Schwarz and Ramond sectors of the theory, and we are also able to evaluate all planar loop correlation functions in the continuum limit. We find evidence to identify the integrable hierarchy of nonlinear equations describing the double scaling limit as a supersymmetric generalization of KP studied by Rabin.

APA, Harvard, Vancouver, ISO, and other styles

32

Baer, Howard, and Csaba Bal zs. "2analysis of the minimal supergravity model including WMAP, (g 2) andb s constraints." Journal of Cosmology and Astroparticle Physics 2003, no. 05 (2003): 006. http://dx.doi.org/10.1088/1475-7516/2003/05/006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Jung, Dong-Won, Sin Kyu Kang, Jong Dae Park, and Eung Jin Chun. "Neutrino Oscillations and Collider Test of the R-parity Violating Minimal Supergravity Model." Journal of High Energy Physics 2004, no. 08 (2004): 017. http://dx.doi.org/10.1088/1126-6708/2004/08/017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Moultaka, Gilbert, Michel Rausch de Traubenberg, and Damien Tant. "Low energy supergravity revisited (I)." International Journal of Modern Physics A 34, no. 01 (2019): 1950004. http://dx.doi.org/10.1142/s0217751x19500040.

Full text

Abstract:

General forms of the Kähler and superpotenials that lead to consistent low energy broken Supersymmetry originating from N[Formula: see text]=[Formula: see text]1 Supergravity have been classified and used for model building since more than three decades. We point out the incompleteness of this classification when hidden sector vacuum expectation values are of the order of the Planck mass. Focusing in this paper mainly on the case of minimal Kähler potential, we adopt a rigorous approach that retrieves on the one hand the known forms, and demonstrate on the other hand the existence of a whole set of new forms for the superpotential of which we give a complete classification. The latter forms involve a new type of chiral superfields having the unusual property of belonging neither to the hidden sector nor to the conventional observable sector. Comparing the obtained forms with the conventional ones, we argue how new possibilities for model building can arise, and discuss the gravity mediation of soft as well as additional hard (but parametrically small) Supersymmetry breaking, in the presence of the new type of chiral superfields. In the simplest case, we study the vacuum structure, characterize the masses and couplings of the scalar components to the hidden and observable sectors and discuss briefly the physical role they could play. In the generic case, we estimate the magnitude and possible consequences of the hard breaking of Supersymmetry in terms of the interplay between hidden and visible sector mass scales.

APA, Harvard, Vancouver, ISO, and other styles

35

BAJC, BORUT. "SUSY BREAKING IN GUTS." International Journal of Modern Physics A 22, no. 31 (2007): 5831–40. http://dx.doi.org/10.1142/s0217751x07039055.

Full text

Abstract:

I will describe a minimal supersymmetric SU(5) model, in which the adjoint multiplet breaks spontaneously both gauge and supersymmetry. This inevitably leads to intermediate scales, which in turn increase the GUT scale. The dimension 6 proton decay is thus suppressed, while soft terms coming from supergravity typically dominate.

APA, Harvard, Vancouver, ISO, and other styles

36

LOPEZ, JORGE L., and D. V. NANOPOULOS. "NEW BOUNDS ON THE HIGGS SECTOR OF MINIMAL SUSY." Modern Physics Letters A 05, no. 16 (1990): 1259–64. http://dx.doi.org/10.1142/s0217732390001426.

Full text

Abstract:

We examine the Higgs sector of the minimal supersymmetric extension of the standard model. The requirement of perturbative unification combined with the recent LEP data on Higgs boson searches, excludes substantial regions of parameter space. We find that only 0.42 ≤ tan β≲0.76 and tan β≳1.30 are the allowed values for tan β=υ2/υ1. We also determine the absolute lower bound on the lightest Higgs mass to be ≈8 GeV. We conclude that improved lower bounds on the top quark mass and/or the standard model Higgs boson mass will impose yet more stringent constraints on the model. These results clearly favor tan β>1, in agreement with N=1 supergravity or superstring-inspired models.

APA, Harvard, Vancouver, ISO, and other styles

37

Baer, Howard, Alexander Belyaev, Tadas Krupovnickas, and Jorge O Farrill. "Indirect, direct and collider detection of neutralino dark matter in the minimal supergravity model." Journal of Cosmology and Astroparticle Physics 2004, no. 08 (2004): 005. http://dx.doi.org/10.1088/1475-7516/2004/08/005.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Díaz, Marco Aurelio. "Chargino Production in Different Supergravity Models and the Effect of the Tadpoles." Modern Physics Letters A 12, no. 05 (1997): 307–13. http://dx.doi.org/10.1142/s0217732397000303.

Full text

Abstract:

If the lightest chargino is discovered at LEP2, the measurement of its mass and cross-section together with the mass of the lightest neutralino, enables the determination of the parameters that define the theory and the entire supersymmetric and Higgs spectrum. Within this context, we: (i) study the effect of the one-loop tadpoles in the minimization condition of the Higgs potential, by comparing the RGE-improved Higgs potential approximation with the calculation of the minimum including the effect of the one-loop tadpoles, and (ii) compare the prediction of two different supergravity models, namely, the model based on B=2m0 and motivated by the solution of the μ-problem, and the minimal supergravity model, based on A=B-m0.

APA, Harvard, Vancouver, ISO, and other styles

39

Sarkar, Arunoday, Chitrak Sarkar та Buddhadeb Ghosh. "A novel way of constraining the α-attractor chaotic inflation through Planck data". Journal of Cosmology and Astroparticle Physics 2021, № 11 (2021): 029. http://dx.doi.org/10.1088/1475-7516/2021/11/029.

Full text

Abstract:

Abstract Defining a scale of k-modes of the quantum fluctuations during inflation through the dynamical horizon crossing condition k = aH we go from the physical t variable to k variable and solve the equations of cosmological first-order perturbations self consistently, with the chaotic α-attractor type potentials. This enables us to study the behaviour of ns , r, nt and N in the k-space. Comparison of our results in the low-k regime with the Planck data puts constraints on the values of the α parameter through microscopic calculations. Recent studies had already put model-dependent constraints on the values of α through the hyperbolic geometry of a Poincaré disk: consistent with both the maximal supergravity model 𝒩 = 8 and the minimal supergravity model 𝒩 = 1, the constraints on the values of α are 1/3, 2/3, 1, 4/3, 5/3, 2, 7/3. The minimal 𝒩 = 1 supersymmetric cosmological models with B-mode targets, derived from these supergravity models, predicted the values of r between 10-2 and 10-3. Both in the E-model and the T-model potentials, we have obtained, in our calculations, the values of r in this range for all the constrained values of α stated above, within 68% CL. Moreover, we have calculated r for some other possible values of α both in low-α limit, using the formula r = 12α/N 2, and in the high-α limit, using the formula r = 4n/N, for n = 2 and 4. With all such values of α, our calculated results match with the Planck-2018 data with 68% or near 95% CL.

APA, Harvard, Vancouver, ISO, and other styles

40

DERIGLAZOV, A. A., and A. V. GALAJINSKY. "LOCAL SYMMETRIES STRUCTURE OF THE SUPERPARTICLE AND SUPERGRAVITY BACKGROUNDS." Modern Physics Letters A 10, no. 37 (1995): 2819–29. http://dx.doi.org/10.1142/s0217732395002969.

Full text

Abstract:

The classical (1,0) superparticle in a curved superspace is considered. The minimal set of constraints to be imposed on the background for correct inclusion of interaction is found. The most general form of Siegel-type local fermionic symmetry is presented. Gauge algebra of the model is shown to be closed off-shell (by means of adding one trivial symmetry) and deformed as compared to the flat one. The form and algebraic structure of local symmetries of the theory are shown not to be deformed (in comparing with the flat case) in the (1,0) supergravity background only.

APA, Harvard, Vancouver, ISO, and other styles

41

ROYCHOWDHURY, RAJU. "ATTRACTOR FLOWS IN st2 BLACK HOLES." International Journal of Geometric Methods in Modern Physics 08, no. 05 (2011): 1031–77. http://dx.doi.org/10.1142/s0219887811005531.

Full text

Abstract:

Following the same treatment of Bellucci et al. we obtain, the hitherto unknown general solutions of the radial attractor flow equations for extremal black holes, both for non-BPS with non-vanishing and vanishing central charge Z for the so-called st2 model, the minimal rank-two [Formula: see text] symmetric supergravity in d = 4 space-time dimensions. We also make useful comparisons with results that already exist in literature, and introduce the fake supergravity (first-order) formalism to be used in our analysis. An analysis of the BPS bound all along the non-BPS attractor flows and of the marginal stability of corresponding D-brane charge configurations has also been presented.

APA, Harvard, Vancouver, ISO, and other styles

42

Ketov, Sergei. "Multi-Field versus Single-Field in the Supergravity Models of Inflation and Primordial Black Holes." Universe 7, no. 5 (2021): 115. http://dx.doi.org/10.3390/universe7050115.

Full text

Abstract:

We review the models unifying inflation and Primordial Black Hole (PBH) formation, which are based on the modified (Starobinsky-type) supergravity. We begin with the basic (Starobinsky) inflationary model of modified gravity and its alpha-attractor-type generalizations for PBH production, and recall how all those single-field models can be embedded into the minimal supergravity. Then, we focus on the effective two-field models arising from the modified (Starobinsky-type) supergravity and compare them to the single-field models under review. Those two-field models describe double inflation whose first stage is driven by Starobinsky’s scalaron and whose second stage is driven by another scalar belonging to the supergravity multiplet. The power spectra are numerically computed, and it is found that the ultra-slow-roll regime gives rise to the enhancement (peak) in the scalar power spectrum leading to an efficient PBH formation. The resulting PBH masses and their density fraction (as part of dark matter) are found to be in agreement with cosmological observations. The PBH-induced gravitational waves, if any, are shown to be detectable by the ground-based and space-based gravitational interferometers under construction.

APA, Harvard, Vancouver, ISO, and other styles

43

Fabiano, Nikola. "Supersymmetry." Vojnotehnicki glasnik 71, no. 2 (2023): 439–51. http://dx.doi.org/10.5937/vojtehg71-40268.

Full text

Abstract:

Introduction/purpose: Supersymmetry is a symmetry of the Lagrangian that goes beyond Lie groups. It allows the exchange of bosons and fermions. The most important model is the Minimal Supersymmetric Standard Model, or MSSM. Methods: Supercharge algebra, superfields, Grassmann numbers, Berezin integral. Results: Supersymmetric transformations are global, they do not depend on spacetime coordinates. In the case of Supergravity, they are local. Conclusion: Supersymmetric models, and MSSM in particular, could describe more physics and more particles beyond the Standard Model.

APA, Harvard, Vancouver, ISO, and other styles

44

Goto, T., and Y. Okada. "Charged Higgs Mass Bound from the b->s Process in the Minimal Supergravity Model." Progress of Theoretical Physics 94, no. 3 (1995): 407–15. http://dx.doi.org/10.1143/ptp.94.407.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Nihei, T. "Effect of SUSY Phases on the B0d - B 0d Mixing in the Minimal Supergravity Model." Progress of Theoretical Physics 98, no. 5 (1997): 1157–63. http://dx.doi.org/10.1143/ptp.98.1157.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Buchbinder, I. L., S. M. Kuzenko, and O. A. Soloviev. "One-loop counterterms of Wess-Zumino model in the N = 1 non-minimal supergravity background." Nuclear Physics B 322, no. 1 (1989): 277–300. http://dx.doi.org/10.1016/0550-3213(89)90494-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Gunion, J. F., and H. Pois. "Exploring the yukawa unified minimal supergravity model at the tevatron, LEP II and the LHC." Physics Letters B 329, no. 1 (1994): 136–42. http://dx.doi.org/10.1016/0370-2693(94)90529-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

MAJUMDAR, PARTHASARATHI. "COVARIANTLY QUANTIZED D=4, N=1 GREEN-SCHWARZ SIGMA MODELS." International Journal of Modern Physics A 06, no. 04 (1991): 599–611. http://dx.doi.org/10.1142/s0217751x91000356.

Full text

Abstract:

The Batalin-Vilkovisky quantization technique is used to provide a manifestly Lorentz covariant quantization of the σ-model describing the D=4 heterotic Green-Schwarz superstring propagating in a background superpsace consisting of minimal supergravity “entangled” with a tensor multiplet. The ultraviolet finiteness properties of the one-loop effective action are shown to be identical to those obtained earlier using a manifestly non-covariant gauge-fixing condition.

APA, Harvard, Vancouver, ISO, and other styles

49

BANDO, MASAKO, TAICHIRO KUGO, NOBUHIRO MAEKAWA, and HIROAKI NAKANO. "WHY IS TOP HEAVIER THAN BOTTOM? YUKAWA AND MASS UNIFICATION IN SUSY MODEL." Modern Physics Letters A 07, no. 36 (1992): 3379–90. http://dx.doi.org/10.1142/s0217732392002779.

Full text

Abstract:

We examine whether the unification constraints on the Yukawa couplings and on the Higgs masses in the minimal supersymmetric Standard Model can be consistent with the observed mass pattern of the third generation fermions. The effects of the QCD interaction and the SU(2)R breaking owing to the U(1) Y gauge interaction and the absence of ντR are crucial. We observe that the parameter choice of “no-scale” supergravity is favored and the SUSY breaking scale has a lower bound, in order for the top quark to be much heavier than the bottom quark.

APA, Harvard, Vancouver, ISO, and other styles

50

WELLS, JAMES D. "THE IMPORTANCE OF TAU LEPTONS FOR SUPERSYMMETRY SEARCHES AT THE TEVATRON." Modern Physics Letters A 13, no. 24 (1998): 1923–30. http://dx.doi.org/10.1142/s0217732398002035.

Full text

Abstract:

Supersymmetry is perhaps most effectively probed at the Tevatron through production and decay of weak gauginos. Most of the analyses of weak gaugino observables require electrons or muons in the final state. However it is possible that the gauginos will decay primarily to τ leptons, thus complicating the search for supersymmetry. The motivating reasons for high τ multiplicity final states are discussed in three approaches to supersymmetry model building: minimal supergravity, minimal gauge mediated supersymmetry, and more minimal supersymmetry. The concept of "e/μ/τ candidate" is introduced, and an observable with three e/μ/τ candidates is defined in analog to the trilepton observable. The maximum mass reach for supersymmetry is then estimated when gaugino decays to τ leptons have full branching fraction.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!