Abstract
The supersymmetric contributions to the muon anomalous magnetic moment a μ and to the decay μ → eγ are given by very similar Feynman diagrams. Previous works reported correlations in specific scenarios, in particular if a μ is dominated by a single diagram. In this work we give an extensive survey of the possible correlations. We discuss examples of single-diagram domination with particularly strong correlations, and provide corresponding benchmark parameter points. We show how the correlations are weakened by significant cancellations between diagrams in large parts of the MSSM parameter space. Nevertheless, the order of magnitude of BR(μ → eγ) for a fixed flavor-violating parameter can often be predicted. We summarize the behavior by plotting the correlations as well as resulting bounds on the flavor-violating parameters under various assumptions on the MSSM spectrum.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
M. Graesser and S.D. Thomas, Supersymmetric relations among electromagnetic dipole operators, Phys. Rev. D 65 (2002) 075012 [hep-ph/0104254] [INSPIRE].
Z. Chacko and G.D. Kribs, Constraints on lepton flavor violation in the MSSM from the muon anomalous magnetic moment measurement, Phys. Rev. D 64 (2001) 075015 [hep-ph/0104317] [INSPIRE].
G. Isidori, F. Mescia, P. Paradisi and D. Temes, Flavour physics at large tan β with a binolike lightest supersymmetric particle, Phys. Rev. D 75 (2007) 115019 [hep-ph/0703035] [INSPIRE].
Muon G-2 collaboration, G.W. Bennett et al., Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL, Phys. Rev. D 73 (2006) 072003 [hep-ex/0602035] [INSPIRE].
M. Davier, A. Hoecker, B. Malaescu and Z. Zhang, Reevaluation of the Hadronic Contributions to the Muon g − 2 and to α(M 2 Z ), Eur. Phys. J. C 71 (2011) 1515 [Erratum ibid. C 72 (2012) 1874] [arXiv:1010.4180] [INSPIRE].
T. Aoyama, M. Hayakawa, T. Kinoshita and M. Nio, Complete Tenth-Order QED Contribution to the Muon g − 2, Phys. Rev. Lett. 109 (2012) 111808 [arXiv:1205.5370] [INSPIRE].
C. Gnendiger, D. Stöckinger and H. Stöckinger-Kim, The electroweak contributions to (g − 2) μ after the Higgs boson mass measurement, Phys. Rev. D 88 (2013) 053005 [arXiv:1306.5546] [INSPIRE].
K. Hagiwara, R. Liao, A.D. Martin, D. Nomura and T. Teubner, (g − 2) μ and α(M 2 Z ) re-evaluated using new precise data, J. Phys. G 38 (2011) 085003 [arXiv:1105.3149] [INSPIRE].
M. Benayoun, P. David, L. DelBuono and F. Jegerlehner, An Update of the HLS Estimate of the Muon g-2, Eur. Phys. J. C 73 (2013) 2453 [arXiv:1210.7184] [INSPIRE].
New (g − 2) collaboration, R.M. Carey et al., The New (g − 2) Experiment: A Proposal to Measure the Muon Anomalous Magnetic Moment to ±0.14 ppm Precision, FERMILAB-PROPOSAL-0989, FNAL (2009), http://inspirehep.net/record/818866/files/fermilab-proposal-0989.PDF.
B.L. Roberts, Status of the Fermilab Muon (g − 2) Experiment, Chin. Phys. C 34 (2010) 741 [arXiv:1001.2898] [INSPIRE].
J-PARC New g-2/EDM experiment collaboration, H. Iinuma, New approach to the muon g-2 and EDM experiment at J-PARC, J. Phys. Conf. Ser. 295 (2011) 012032 [INSPIRE].
MEG collaboration, J. Adam et al., New constraint on the existence of the μ + → e + γ decay, Phys. Rev. Lett. 110 (2013) 201801 [arXiv:1303.0754] [INSPIRE].
A.M. Baldini, F. Cei, C. Cerri, S. Dussoni, L. Galli et al., MEG Upgrade Proposal, arXiv:1301.7225 [INSPIRE].
J. Hisano, T. Moroi, K. Tobe and M. Yamaguchi, Lepton flavor violation via right-handed neutrino Yukawa couplings in supersymmetric standard model, Phys. Rev. D 53 (1996) 2442 [hep-ph/9510309] [INSPIRE].
BayesFITS Group collaboration, A. Fowlie, K. Kowalska, L. Roszkowski, E.M. Sessolo and Y.-L.S. Tsai, Dark matter and collider signatures of the MSSM, Phys. Rev. D 88 (2013) 055012 [arXiv:1306.1567] [INSPIRE].
M. Cahill-Rowley, J.L. Hewett, A. Ismail and T.G. Rizzo, pMSSM Studies at the 7, 8 and 14 TeV LHC, arXiv:1307.8444 [INSPIRE].
S. Henrot-Versillé, R. Lafaye, T. Plehn, M. Rauch, D. Zerwas et al., Constraining Supersymmetry using the relic density and the Higgs boson, Phys. Rev. D 89 (2014) 055017 [arXiv:1309.6958] [INSPIRE].
L. Calibbi, J.M. Lindert, T. Ota and Y. Takanishi, Cornering light Neutralino Dark Matter at the LHC, JHEP 10 (2013) 132 [arXiv:1307.4119] [INSPIRE].
G. Bélanger, G. Drieu La Rochelle, B. Dumont, R.M. Godbole, S. Kraml et al., LHC constraints on light neutralino dark matter in the MSSM, Phys. Lett. B 726 (2013) 773 [arXiv:1308.3735] [INSPIRE].
M. Endo, K. Hamaguchi, S. Iwamoto and T. Yoshinaga, Muon g − 2 vs LHC in Supersymmetric Models, JHEP 01 (2014) 123 [arXiv:1303.4256] [INSPIRE].
H.G. Fargnoli, C. Gnendiger, S. Paßehr, D. Stöckinger and H. Stöckinger-Kim, Non-decoupling two-loop corrections to (g − 2) μ from fermion/sfermion loops in the MSSM, Phys. Lett. B 726 (2013) 717 [arXiv:1309.0980] [INSPIRE].
H. Fargnoli, C. Gnendiger, S. Paßehr, D. Stöckinger and H. Stöckinger-Kim, Two-loop corrections to the muon magnetic moment from fermion/sfermion loops in the MSSM: detailed results, JHEP 02 (2014) 070 [arXiv:1311.1775] [INSPIRE].
T. Moroi, The Muon anomalous magnetic dipole moment in the minimal supersymmetric standard model, Phys. Rev. D 53 (1996) 6565 [Erratum ibid. D 56 (1997) 4424] [hep-ph/9512396] [INSPIRE].
D. Stöckinger, The Muon Magnetic Moment and Supersymmetry, J. Phys. G 34 (2007) R45 [hep-ph/0609168] [INSPIRE].
M. Endo, K. Hamaguchi, T. Kitahara and T. Yoshinaga, Probing Bino contribution to muon g − 2, JHEP 11 (2013) 013 [arXiv:1309.3065] [INSPIRE].
P. Grothaus, M. Lindner and Y. Takanishi, Naturalness of Neutralino Dark Matter, JHEP 07 (2013) 094 [arXiv:1207.4434] [INSPIRE].
J.F. Gunion and H.E. Haber, Two-body Decays of Neutralinos and Charginos, Phys. Rev. D 37 (1988) 2515 [INSPIRE].
I. Masina and C.A. Savoy, Sleptonarium: Constraints on the CP and flavor pattern of scalar lepton masses, Nucl. Phys. B 661 (2003) 365 [hep-ph/0211283] [INSPIRE].
P. Paradisi, Constraints on SUSY lepton flavor violation by rare processes, JHEP 10 (2005) 006 [hep-ph/0505046] [INSPIRE].
Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1405.2972
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Kersten, J., Park, Jh., Stöckinger, D. et al. Understanding the correlation between (g − 2) μ and μ → eγ in the MSSM. J. High Energ. Phys. 2014, 118 (2014). https://doi.org/10.1007/JHEP08(2014)118
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP08(2014)118