Abstract
Electroweak baryogenesis is an attractive scenario for the generation of the baryon asymmetry of the universe as its realization depends on the presence at the weak scale of new particles which may be searched for at high energy colliders. In the MSSM it may only be realized in the presence of light stops, and with moderate or small mixing between the left- and right-handed components. Consistency with the observed Higgs mass around 125 GeV demands the heavier stop mass to be much larger than the weak scale. Moreover the lighter stop leads to an increase of the gluon-gluon fusion Higgs production cross section which seems to be in contradiction with indications from current LHC data. We show that this tension may be considerably relaxed in the presence of a light neutralino with a mass lower than about 60 GeV, satisfying all present experimental constraints. In such a case the Higgs may have a significant invisible decay width and the stop decays through a three or four body decay channel, including a bottom quark and the lightest neutralino in the final state. All these properties make this scenario testable at a high luminosity LHC.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
A. Sakharov, Violation of CP invariance, c asymmetry and baryon asymmetry of the universe, Pisma Zh. Eksp. Teor. Fiz. 5 (1967) 32 [INSPIRE].
A.G. Cohen, D. Kaplan and A. Nelson, Progress in electroweak baryogenesis, Ann. Rev. Nucl. Part. Sci. 43 (1993) 27 [hep-ph/9302210] [INSPIRE].
M. Quirós, Field theory at finite temperature and phase transitions, Helv. Phys. Acta 67 (1994)451 [INSPIRE].
M. Quirós, Finite temperature field theory and phase transitions, hep-ph/9901312 [INSPIRE].
V. Rubakov and M. Shaposhnikov, Electroweak baryon number nonconservation in the early universe and in high-energy collisions, Usp. Fiz. Nauk 166 (1996) 493 [hep-ph/9603208] [INSPIRE].
M.S. Carena and C. Wagner, Electroweak baryogenesis and Higgs physics, hep-ph/9704347 [INSPIRE].
K. Kajantie, K. Rummukainen and M.E. Shaposhnikov, A lattice Monte Carlo study of the hot electroweak phase transition, Nucl. Phys. B 407 (1993) 356 [hep-ph/9305345] [INSPIRE].
Z. Fodor, J. Hein, K. Jansen, A. Jaster and I. Montvay, Simulating the electroweak phase transition in the SU(2) Higgs model, Nucl. Phys. B 439 (1995) 147 [hep-lat/9409017] [INSPIRE].
K. Kajantie, M. Laine, K. Rummukainen and M.E. Shaposhnikov, The electroweak phase transition: a nonperturbative analysis, Nucl. Phys. B 466 (1996) 189 [hep-lat/9510020] [INSPIRE].
K. Jansen, Status of the finite temperature electroweak phase transition on the lattice, Nucl. Phys. Proc. Suppl. 47 (1996) 196 [hep-lat/9509018] [INSPIRE].
G.R. Farrar and M. Shaposhnikov, Baryon asymmetry of the universe in the minimal standard model, Phys. Rev. Lett. 70 (1993) 2833 [Erratum ibid. 71 (1993) 210] [hep-ph/9305274] [INSPIRE].
M. Gavela, P. Hernández, J. Orloff and O. Pene, Standard model CP-violation and baryon asymmetry, Mod. Phys. Lett. A 9 (1994) 795 [hep-ph/9312215] [INSPIRE].
M. Gavela, P. Hernández, J. Orloff, O. Pene and C. Quimbay, Standard model CP-violation and baryon asymmetry. Part 2: finite temperature, Nucl. Phys. B 430 (1994) 382 [hep-ph/9406289] [INSPIRE].
P. Huet and E. Sather, Electroweak baryogenesis and standard model CP-violation, Phys. Rev. D 51 (1995) 379 [hep-ph/9404302] [INSPIRE].
M.S. Carena, M. Quirós and C. Wagner, Opening the window for electroweak baryogenesis, Phys. Lett. B 380 (1996) 81 [hep-ph/9603420] [INSPIRE].
D. Delepine, J. Gerard, R. Gonzalez Felipe and J. Weyers, A light stop and electroweak baryogenesis, Phys. Lett. B 386 (1996) 183 [hep-ph/9604440] [INSPIRE].
J.M. Cline and K. Kainulainen, Supersymmetric electroweak phase transition: beyond perturbation theory, Nucl. Phys. B 482 (1996) 73 [hep-ph/9605235] [INSPIRE].
J.M. Cline and K. Kainulainen, Supersymmetric electroweak phase transition: dimensional reduction versus effective potential, Nucl. Phys. B 510 (1998) 88 [hep-ph/9705201] [INSPIRE].
M. Laine and K. Rummukainen, The MSSM electroweak phase transition on the lattice, Nucl. Phys. B 535 (1998) 423 [hep-lat/9804019] [INSPIRE].
M. Laine and K. Rummukainen, A strong electroweak phase transition up to m H is about 105 GeV, Phys. Rev. Lett. 80 (1998) 5259 [hep-ph/9804255] [INSPIRE].
M. Laine, Effective theories of MSSM at high temperature, Nucl. Phys. B 481 (1996) 43 [Erratum ibid. B 548 (1999) 637–638] [hep-ph/9605283] [INSPIRE].
M. Losada, High temperature dimensional reduction of the MSSM and other multiscalar models, Phys. Rev. D 56 (1997) 2893 [hep-ph/9605266] [INSPIRE].
M. Losada, The electroweak phase transition in the minimal supersymmetric standard model, hep-ph/9612337 [INSPIRE].
G.R. Farrar and M. Losada, SUSY and the electroweak phase transition, Phys. Lett. B 406 (1997) 60 [hep-ph/9612346] [INSPIRE].
J. Espinosa, Dominant two loop corrections to the MSSM finite temperature effective potential, Nucl. Phys. B 475 (1996) 273 [hep-ph/9604320] [INSPIRE].
B. de Carlos and J. Espinosa, The baryogenesis window in the MSSM, Nucl. Phys. B 503 (1997) 24 [hep-ph/9703212] [INSPIRE].
M.S. Carena, M. Quirós, A. Riotto, I. Vilja and C. Wagner, Electroweak baryogenesis and low-energy supersymmetry, Nucl. Phys. B 503 (1997) 387 [hep-ph/9702409] [INSPIRE].
M.S. Carena, M. Quirós and C. Wagner, Electroweak baryogenesis and Higgs and stop searches at LEP and the Tevatron, Nucl. Phys. B 524 (1998) 3 [hep-ph/9710401] [INSPIRE].
J.M. Cline, M. Joyce and K. Kainulainen, Supersymmetric electroweak baryogenesis in the WKB approximation, Phys. Lett. B 417 (1998) 79 [Erratum ibid. B 448 (1999) 321] [hep-ph/9708393] [INSPIRE].
T. Multamaki and I. Vilja, CP violation and baryogenesis in the low-energy minimal supersymmetric standard model, Phys. Lett. B 411 (1997) 301 [hep-ph/9705469] [INSPIRE].
A. Riotto, More about electroweak baryogenesis in the minimal supersymmetric standard model, Int. J. Mod. Phys. D 7 (1998) 815 [hep-ph/9709286] [INSPIRE].
M.P. Worah, Supersymmetric baryogenesis at the electroweak phase transition, Phys. Rev. D 56 (1997) 2010 [hep-ph/9702423] [INSPIRE].
D. Bödeker, P. John, M. Laine and M. Schmidt, The two loop MSSM finite temperature effective potential with stop condensation, Nucl. Phys. B 497 (1997) 387 [hep-ph/9612364] [INSPIRE].
J.M. Cline and G.D. Moore, Supersymmetric electroweak phase transition: baryogenesis versus experimental constraints, Phys. Rev. Lett. 81 (1998) 3315 [hep-ph/9806354] [INSPIRE].
J.M. Cline and K. Kainulainen, A new source for electroweak baryogenesis in the MSSM, Phys. Rev. Lett. 85 (2000) 5519 [hep-ph/0002272] [INSPIRE].
J.M. Cline, M. Joyce and K. Kainulainen, Supersymmetric electroweak baryogenesis, JHEP 07 (2000) 018 [hep-ph/0006119] [INSPIRE].
M.S. Carena, J. Moreno, M. Quirós, M. Seco and C. Wagner, Supersymmetric CP-violating currents and electroweak baryogenesis, Nucl. Phys. B 599 (2001) 158 [hep-ph/0011055] [INSPIRE].
M.S. Carena, M. Quirós, M. Seco and C. Wagner, Improved results in supersymmetric electroweak baryogenesis, Nucl. Phys. B 650 (2003) 24 [hep-ph/0208043] [INSPIRE].
T. Konstandin, T. Prokopec, M.G. Schmidt and M. Seco, MSSM electroweak baryogenesis and flavor mixing in transport equations, Nucl. Phys. B 738 (2006) 1 [hep-ph/0505103] [INSPIRE].
V. Cirigliano, S. Profumo and M.J. Ramsey-Musolf, Baryogenesis, electric dipole moments and dark matter in the MSSM, JHEP 07 (2006) 002 [hep-ph/0603246] [INSPIRE].
M. Carena, G. Nardini, M. Quirós and C. Wagner, The baryogenesis window in the MSSM, Nucl. Phys. B 812 (2009) 243 [arXiv:0809.3760] [INSPIRE].
ATLAS collaboration, Observation of an excess of events in the search for the standard model Higgs boson with the ATLAS detector at the LHC, ATLAS-CONF-2012-093 (2012).
J. Incandela, Update on the standard model Higgs searches in CMS, CERN Seminar, July 4, 2012.
ATLAS collaboration, Search for the standard model Higgs boson in the diphoton decay channel with 4.9 fb −1 of pp collisions at \( \sqrt{s}=7 \) TeV with ATLAS, Phys. Rev. Lett. 108 (2012) 111803 [arXiv:1202.1414] [INSPIRE].
CMS collaboration, Search for the standard model Higgs boson decaying into two photons in pp collisions at \( \sqrt{s}=7 \) TeV, Phys. Lett. B 710 (2012) 403 [arXiv:1202.1487] [INSPIRE].
ATLAS collaboration, Observation of an excess of events in the search for the standard model Higgs boson in the γ-γ channel with the ATLAS detector, ATLAS-CONF-2012-091 (2012).
CMS collaboration, Evidence for a new state decaying into two photons in the search for the standard model Higgs boson in pp collisions, HIG-12-015 (2012).
O. Arnaez, Searches for the SM scalar boson in the WW decay channel with the ATLAS experiment, talk given at the Higgs Hunting 2012 Conference, Orsay, France, July 18, 2012.
M. Carena, G. Nardini, M. Quirós and C.E. Wagner, The effective theory of the light stop scenario, JHEP 10 (2008) 062 [arXiv:0806.4297] [INSPIRE].
A. Djouadi, The anatomy of electro-weak symmetry breaking. II. The Higgs bosons in the minimal supersymmetric model, Phys. Rept. 459 (2008) 1 [hep-ph/0503173] [INSPIRE].
A. Menon and D.E. Morrissey, Higgs boson signatures of MSSM electroweak baryogenesis, Phys. Rev. D 79 (2009) 115020 [arXiv:0903.3038] [INSPIRE].
T. Cohen, D.E. Morrissey and A. Pierce, Electroweak baryogenesis and Higgs signatures, Phys. Rev. D 86 (2012) 013009 [arXiv:1203.2924] [INSPIRE].
D. Curtin, P. Jaiswal and P. Meade, Excluding electroweak baryogenesis in the MSSM, JHEP 08 (2012) 005 [arXiv:1203.2932] [INSPIRE].
A. Delgado, G. Nardini and M. Quirós, The light stop scenario from gauge mediation, JHEP 04 (2012) 137 [arXiv:1201.5164] [INSPIRE].
R. Essig, E. Izaguirre, J. Kaplan and J.G. Wacker, Heavy flavor simplified models at the LHC, JHEP 01 (2012) 074 [arXiv:1110.6443] [INSPIRE].
Y. Kats, P. Meade, M. Reece and D. Shih, The status of GMSB after 1/fb at the LHC, JHEP 02 (2012) 115 [arXiv:1110.6444] [INSPIRE].
M. Papucci, J.T. Ruderman and A. Weiler, Natural SUSY endures, JHEP 09 (2012) 035 [arXiv:1110.6926] [INSPIRE].
X.-J. Bi, Q.-S. Yan and P.-F. Yin, Probing light stop pairs at the LHC, Phys. Rev. D 85 (2012) 035005 [arXiv:1111.2250] [INSPIRE].
C. Brust, A. Katz, S. Lawrence and R. Sundrum, SUSY, the third generation and the LHC, JHEP 03 (2012) 103 [arXiv:1110.6670] [INSPIRE].
N. Desai and B. Mukhopadhyaya, Constraints on supersymmetry with light third family from LHC data, JHEP 05 (2012) 057 [arXiv:1111.2830] [INSPIRE].
A. Choudhury and A. Datta, New limits on top squark NLSP from LHC 4.7 fb −1 data, Mod. Phys. Lett. A 27 (2012) 1250188 [arXiv:1207.1846] [INSPIRE].
CDF collaboration, T. Aaltonen et al., Search for pair production of supersymmetric top quarks in dilepton events from \( p\overline{p} \) collisions at \( \sqrt{s}=1.96 \) TeV, Phys. Rev. Lett. 104 (2010) 251801 [arXiv:0912.1308] [INSPIRE].
ATLAS collaboration, Search for light scalar top quark pair production in final states with two leptons with the ATLAS detector in \( \sqrt{s}=7 \) TeV proton-proton collisions, Eur. Phys. J. C 72 (2012) 2237 [arXiv:1208.4305] [INSPIRE].
ATLAS collaboration, Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in \( \sqrt{s}=7 \) TeV proton-proton collisions, ATLAS-CONF-2012-070 (2012).
ATLAS collaboration, Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in \( \sqrt{s}=7 \) TeV proton-proton collisions, ATLAS-CONF-2012-070 (2012).
CDF and D0 collaborations, P. Calfayan, Search for scalar top and bottom quarks at the Tevatron, AIP Conf. Proc. 1078 (2009) 262 [INSPIRE].
M. Carena, S. Gori, N.R. Shah and C.E. Wagner, A 125 GeV SM-like Higgs in the MSSM and the γγ rate, JHEP 03 (2012) 014 [arXiv:1112.3336] [INSPIRE].
M. Carena, S. Gori, N.R. Shah, C.E. Wagner and L.-T. Wang, Light Stau phenomenology and the Higgs γγ rate, JHEP 07 (2012) 175 [arXiv:1205.5842] [INSPIRE].
J. Kozaczuk, S. Profumo, M.J. Ramsey-Musolf and C.L. Wainwright, Supersymmetric electroweak baryogenesis via resonant sfermion sources, Phys. Rev. D 86 (2012) 096001 [arXiv:1206.4100] [INSPIRE].
ALEPH collaboration, A. Heister et al., Search for scalar quarks in e+e− collisions at \( \sqrt{s} \) up to 209 GeV, Phys. Lett. B 537 (2002) 5 [hep-ex/0204036] [INSPIRE].
K.-i. Hikasa and M. Kobayashi, Light scalar top at e+e− colliders, Phys. Rev. D 36 (1987) 724 [INSPIRE].
C. Boehm, A. Djouadi and Y. Mambrini, Decays of the lightest top squark, Phys. Rev. D 61 (2000) 095006 [hep-ph/9907428] [INSPIRE].
M. Muhlleitner and E. Popenda, Light stop decay in the MSSM with minimal flavour violation, JHEP 04 (2011) 095 [arXiv:1102.5712] [INSPIRE].
M. Hosch, R. Oakes, K. Whisnant, J.M. Yang, B.-l. Young, et al., Probing top quark decay into light stop in the supersymmetric standard model at the upgraded Tevatron, Phys. Rev. D 58 (1998) 034002 [hep-ph/9711234] [INSPIRE].
CDF Collaboration, D0 collaboration, V. Shary, Studies of top quark properties at the Tevatron, arXiv:1205.3771 [INSPIRE].
Particle Data Group collaboration, K. Nakamura et al., Review of particle physics, J. Phys. G 37 (2010) 075021 [INSPIRE].
H.K. Dreiner, S. Heinemeyer, O. Kittel, U. Langenfeld, A.M. Weber, et al., Mass bounds on a very light neutralino, Eur. Phys. J. C 62 (2009) 547 [arXiv:0901.3485] [INSPIRE].
ATLAS collaboration, Search for new phenomena in monojet plus missing transverse momentum final states using 1 fb −1 of pp collisions at \( \sqrt{s}=7 \) TeV with the ATLAS detector, ATLAS-CONF-2011-096 (2011).
C. Englert, J. Jaeckel, E. Re and M. Spannowsky, Evasive Higgs maneuvers at the LHC, Phys. Rev. D 85 (2012) 035008 [arXiv:1111.1719] [INSPIRE].
Y. Bai, P. Draper and J. Shelton, Measuring the invisible Higgs width at the 7 and 8 TeV LHC, JHEP 07 (2012) 192 [arXiv:1112.4496] [INSPIRE].
A. Djouadi, A. Falkowski, Y. Mambrini and J. Quevillon, Direct detection of Higgs-portal dark matter at the LHC, arXiv:1205.3169 [INSPIRE].
ATLAS collaboration, Coupling properties of the new Higgs-like boson observed with the ATLAS detector at the LHC, ATLAS-CONF-2012-127 (2012).
A. Menon, D. Morrissey and C. Wagner, Electroweak baryogenesis and dark matter in the NMSSM, Phys. Rev. D 70 (2004) 035005 [hep-ph/0404184] [INSPIRE].
J. Pradler and F.D. Steffen, Constraints on the reheating temperature in gravitino dark matter scenarios, Phys. Lett. B 648 (2007) 224 [hep-ph/0612291] [INSPIRE].
L. Covi, H.-B. Kim, J.E. Kim and L. Roszkowski, Axinos as dark matter, JHEP 05 (2001) 033 [hep-ph/0101009] [INSPIRE].
A. Brandenburg and F.D. Steffen, Axino dark matter from thermal production, JCAP 08 (2004) 008 [hep-ph/0405158] [INSPIRE].
E. Chun, J.E. Kim and H.P. Nilles, Axino mass, Phys. Lett. B 287 (1992) 123 [hep-ph/9205229] [INSPIRE].
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1207.6330
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
About this article
Cite this article
Carena, M., Nardini, G., Quirós, M. et al. MSSM electroweak baryogenesis and LHC data. J. High Energ. Phys. 2013, 1 (2013). https://doi.org/10.1007/JHEP02(2013)001
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP02(2013)001