Lepton flavour violation in the MSSM: exact diagonalization vs mass expansion

被引:15
作者
Crivellin, Andreas [1 ]
Fabisiewicz, Zofia [2 ]
Materkowska, Weronika [2 ]
Nierste, Ulrich [3 ]
Pokorski, Stefan [2 ]
Rosiek, Janusz [2 ]
机构
[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
[2] Univ Warsaw, Fac Phys, Pasteura 5, PL-02093 Warsaw, Poland
[3] Karlsruhe Inst Technol, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany
来源
JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 06期
基金
瑞士国家科学基金会;
关键词
Supersymmetry Phenomenology; 2-LOOP CONTRIBUTIONS; E-GAMMA; SEARCH; FCNC; MU; CP; ELECTRON; DECAYS; TAU; PHENOMENOLOGY;
D O I
10.1007/JHEP06(2018)003
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
The forthcoming precision data on lepton flavour violating (LFV) decays require precise and efficient calculations in New Physics models. In this article lepton flavour violating processes within the Minimal Supersymmetric Standard Model (MSSM) are calculated using the method based on the Flavour Expansion Theorem, a recently developed technique performing a purely algebraic mass-insertion expansion of the amplitudes. The expansion in both flavour-violating and flavour-conserving off-diagonal terms of sfermion and supersymmetric fermion mass matrices is considered. In this way the relevant processes are expressed directly in terms of the parameters of the MSSM Lagrangian. We also study the decoupling properties of the amplitudes. The results are compared to the corresponding calculations in the mass eigenbasis (i.e. using the exact diagonalization of the mass matrices). Using these methods, we consider the following processes: l -> l'gamma, l -> 3l', l -> 2l'l'', h -> ll' conversion in nuclei. In the numerical analysis we update the bounds on the flavour changing parameters of the MSSM and examine the sensitivity to the forthcoming experimental results. We find that flavour violating muon decays provide the most stringent bounds on supersymmetric effects and will continue to do so in the future. Radiative l -> l'gamma decays and leptonic three-body decays l -> 3l' show an interesting complementarity in eliminating "blind spots" in the parameter space. In our analysis we also include the effects of non-holomorphic A-terms which are important for the study of LFV Higgs decays.
引用
收藏
页数:58
相关论文
共 117 条
[1]   Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC [J].
Aad, G. ;
Abajyan, T. ;
Abbott, B. ;
Abdallah, J. ;
Khalek, S. Abdel ;
Abdelalim, A. A. ;
Abdinov, O. ;
Aben, R. ;
Abi, B. ;
Abolins, M. ;
AbouZeid, U. S. ;
Abramowicz, H. ;
Abreu, H. ;
Acharya, B. S. ;
Adamczyk, L. ;
Adams, D. L. ;
Addy, T. N. ;
Adelman, J. ;
Adomeit, S. ;
Adragna, P. ;
Adye, T. ;
Aefsky, S. ;
Aguilar-Saavedra, J. A. ;
Agustoni, M. ;
Aharrouche, M. ;
Ahlen, S. P. ;
Ahles, F. ;
Ahmad, A. ;
Ahsan, M. ;
Aielli, G. ;
Akdogan, T. ;
Akesson, T. P. A. ;
Akimoto, G. ;
Akimov, A. V. ;
Alam, M. S. ;
Alam, M. A. ;
Albert, J. ;
Albrand, S. ;
Aleksa, M. ;
Aleksandrov, I. N. ;
Alessandria, F. ;
Alexa, C. ;
Alexander, G. ;
Alexandre, G. ;
Alexopoulos, T. ;
Alhroob, M. ;
Aliev, M. ;
Alimonti, G. ;
Alison, J. ;
Allbrooke, B. M. M. .
PHYSICS LETTERS B, 2012, 716 (01) :1-29
[2]   Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions [J].
Abada, A. ;
Krauss, M. E. ;
Porod, W. ;
Staub, F. ;
Vicente, A. ;
Weiland, C. .
JOURNAL OF HIGH ENERGY PHYSICS, 2014, (11)
[3]   Gauge invariant Barr-Zee type contributions to fermionic EDMs in the two-Higgs doublet models [J].
Abe, Tomohiro ;
Hisano, Junji ;
Kitahara, Teppei ;
Tobioka, Kohsaku .
JOURNAL OF HIGH ENERGY PHYSICS, 2016, (04)
[4]   Gauge invariant Barr-Zee type contributions to fermionic EDMs in the two-Higgs doublet models [J].
Abe, Tomohiro ;
Hisano, Junji ;
Kitahara, Teppei ;
Tobioka, Kohsaku .
JOURNAL OF HIGH ENERGY PHYSICS, 2014, (01)
[5]   Fluctuation and fractality study of target residue in S-32-AgBr interaction at 200 a GeV [J].
Ghosh, D ;
Chattopadhyay, R ;
Sarkar, S ;
Jafry, AK ;
Lahiri, M ;
Das, S ;
Purkait, K ;
Roychoudhury, J ;
Biswas, B ;
Deb, A .
ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1997, 73 (02) :269-273
[6]   New Constraint on the Existence of the μ+ → e+ γ Decay [J].
Adam, J. ;
Bai, X. ;
Baldini, A. M. ;
Baracchini, E. ;
Bemporad, C. ;
Boca, G. ;
Cattaneo, P. W. ;
Cavoto, G. ;
Cei, F. ;
Cerri, C. ;
de Bari, A. ;
De Gerone, M. ;
Doke, T. ;
Dussoni, S. ;
Egger, J. ;
Fujii, Y. ;
Galli, L. ;
Gatti, F. ;
Golden, B. ;
Grassi, M. ;
Graziosi, A. ;
Grigoriev, D. N. ;
Haruyama, T. ;
Hildebrandt, M. ;
Hisamatsu, Y. ;
Ignatov, F. ;
Iwamoto, T. ;
Kaneko, D. ;
Kettle, P. -R. ;
Khazin, B. I. ;
Khomotov, N. ;
Kiselev, O. ;
Korenchenko, A. ;
Kravchuk, N. ;
Lim, G. ;
Maki, A. ;
Mihara, S. ;
Molzon, W. ;
Mori, T. ;
Mzavia, D. ;
Nardo, R. ;
Natori, H. ;
Nicolo, D. ;
Nishiguchi, H. ;
Nishimura, Y. ;
Ootani, W. ;
Panareo, M. ;
Papa, A. ;
Piredda, G. ;
Popov, A. .
PHYSICAL REVIEW LETTERS, 2013, 110 (20)
[7]   The strangeness content of the nucleon from effective field theory and phenomenology [J].
Alarcon, J. M. ;
Geng, L. S. ;
Camalich, J. Martin ;
Oller, J. A. .
PHYSICS LETTERS B, 2014, 730 :342-346
[8]   Chiral representation of the πN scattering amplitude and the pion-nucleon sigma term [J].
Alarcon, J. M. ;
Camalich, J. Martin ;
Oller, J. A. .
PHYSICAL REVIEW D, 2012, 85 (05)
[9]   SUSY Les Houches Accord 2 [J].
Allanach, B. C. ;
Balazs, C. ;
Belanger, G. ;
Bernhardt, M. ;
Boudjema, F. ;
Choudhury, D. ;
Desch, K. ;
Ellwanger, U. ;
Gambino, P. ;
Godbole, R. ;
Goto, T. ;
Guasch, J. ;
Guchait, M. ;
Hahn, T. ;
Heinemeyer, S. ;
Hugonie, C. ;
Hurth, T. ;
Kraml, S. ;
Kreiss, S. ;
Lykken, J. ;
Moortgat, F. ;
Moretti, S. ;
Penaranda, S. ;
Plehn, T. ;
Porod, W. ;
Pukhov, A. ;
Richardson, P. ;
Schumacher, M. ;
Silvestrini, L. ;
Skands, P. ;
Slavich, P. ;
Spira, M. ;
Weiglein, G. ;
Wienemann, P. .
COMPUTER PHYSICS COMMUNICATIONS, 2009, 180 (01) :8-25
[10]   Large BR(h → τμ) in the MSSM? [J].
Aloni, Daniel ;
Nir, Yoself ;
Stamou, Emmanuel .
JOURNAL OF HIGH ENERGY PHYSICS, 2016, (04)