Abstract
It is pointed out that in a general class of flavour models one can identify certain universally present FCNC operators, induced by the exchange of heavy flavour messengers. Their coefficients depend on the rotation angles that connect flavour and fermion mass basis. The lower bounds on the messenger scale are derived using updated experimental constraints on the FCNC operators. The obtained bounds are different for different operators and in addition they depend on the chosen set of rotations. Given the sensitivity expected in the forthcoming experiments, the present analysis suggests interesting room for discovering new physics. As the highlights emerge the leptonic processes, μ → eγ, μ → eee and μ → e conversion in nuclei.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
G. D’Ambrosio, G. Giudice, G. Isidori and A. Strumia, Minimal flavor violation: an effective field theory approach, Nucl. Phys. B 645 (2002) 155 [hep-ph/0207036] [INSPIRE].
Z. Lalak, S. Pokorski and G.G. Ross, Beyond MFV in family symmetry theories of fermion masses, JHEP 08 (2010) 129 [arXiv:1006.2375] [INSPIRE].
A.J. Buras, C. Grojean, S. Pokorski and R. Ziegler, FCNC effects in a minimal theory of fermion masses, JHEP 08 (2011) 028 [arXiv:1105.3725] [INSPIRE].
L. Calibbi, Z. Lalak, S. Pokorski and R. Ziegler, The messenger sector of SUSY flavour models and radiative breaking of flavour universality, JHEP 06 (2012) 018 [arXiv:1203.1489] [INSPIRE].
B. Grinstein, M. Redi and G. Villadoro, Low scale flavor gauge symmetries, JHEP 11 (2010) 067 [arXiv:1009.2049] [INSPIRE].
A.J. Buras, M.V. Carlucci, L. Merlo and E. Stamou, Phenomenology of a gauged SU(3)3 flavour model, JHEP 03 (2012) 088 [arXiv:1112.4477] [INSPIRE].
C. Froggatt and H.B. Nielsen, Hierarchy of quark masses, Cabibbo angles and CP-violation, Nucl. Phys. B 147 (1979) 277 [INSPIRE].
M. Leurer, Y. Nir and N. Seiberg, Mass matrix models, Nucl. Phys. B 398 (1993) 319 [hep-ph/9212278] [INSPIRE].
M. Leurer, Y. Nir and N. Seiberg, Mass matrix models: the sequel, Nucl. Phys. B 420 (1994) 468 [hep-ph/9310320] [INSPIRE].
Z. Berezhiani and M.Y. Khlopov, The theory of broken gauge symmetry of families (in Russian), Sov. J. Nucl. Phys. 51 (1990) 739 [Yad. Fiz. 51 (1990) 1157] [INSPIRE].
S. King and G.G. Ross, Fermion masses and mixing angles from SU(3) family symmetry, Phys. Lett. B 520 (2001) 243 [hep-ph/0108112] [INSPIRE].
A. Pomarol and D. Tommasini, Horizontal symmetries for the supersymmetric flavor problem, Nucl. Phys. B 466 (1996) 3 [hep-ph/9507462] [INSPIRE].
R. Barbieri, G. Dvali and L.J. Hall, Predictions from a U(2) flavor symmetry in supersymmetric theories, Phys. Lett. B 377 (1996) 76 [hep-ph/9512388] [INSPIRE].
G. Altarelli and F. Feruglio, Discrete flavor symmetries and models of neutrino mixing, Rev. Mod. Phys. 82 (2010) 2701 [arXiv:1002.0211] [INSPIRE].
F. Feruglio, C. Hagedorn, Y. Lin and L. Merlo, Lepton flavour violation in models with A4 flavour symmetry, Nucl. Phys. B 809 (2009) 218 [arXiv:0807.3160] [INSPIRE].
F. Feruglio and A. Paris, Rare muon and τ decays in A4 models, Nucl. Phys. B 840 (2010) 405 [arXiv:1005.5526] [INSPIRE].
G. Isidori, Y. Nir and G. Perez, Flavor physics constraints for physics beyond the standard model, Ann. Rev. Nucl. Part. Sci. 60 (2010) 355 [arXiv:1002.0900] [INSPIRE].
O. Gedalia and G. Perez, TASI 2009 lectures — Flavor physics, arXiv:1005.3106 [INSPIRE].
Particle Data Group collaborationk, K. Nakamura et al., Review of particle physics, J. Phys. G 37 (2010) 075021 [INSPIRE].
UTfit collaboration, M. Bona et al., Model-independent constraints on ΔF = 2 operators and the scale of new physics, JHEP 03 (2008) 049 [arXiv:0707.0636] [INSPIRE].
G. Isidori, J.F. Kamenik, Z. Ligeti and G. Perez, Implications of the LHCb evidence for charm CP-violation, Phys. Lett. B 711 (2012) 46 [arXiv:1111.4987] [INSPIRE].
LHCb collaboration, R. Aaij et al., Measurement of the CP-violating phase ϕ s in the decay B s → J/ψϕ, Phys. Rev. Lett. 108 (2012) 101803 [arXiv:1112.3183] [INSPIRE].
Heavy Flavor Averaging Group collaboration, D. Asner et al., Averages of b-hadron, c-hadron and τ -lepton Properties, arXiv:1010.1589 [INSPIRE].
LHCb collaboration, Letter of Intent for the LHCb Upgrade, CERN-LHCC-2011-001 (2011).
MEG collaboration, J. Adam et al., New limit on the lepton-flavour violating decay μ + → e + γ, Phys. Rev. Lett. 107 (2011) 171801 [arXiv:1107.5547] [INSPIRE].
A. Schöning, S. Bachmann and R. Narayan, A novel experiment to search for the decay μ → eee, Phys. Proc. 17(2011)181 .
W. Altmannshofer, A.J. Buras, S. Gori, P. Paradisi and D.M. Straub, Anatomy and phenomenology of FCNC and CPV effects in SUSY theories, Nucl. Phys. B 830 (2010) 17 [arXiv:0909.1333] [INSPIRE].
H. Georgi and C. Jarlskog, A new lepton-quark mass relation in a unified theory, Phys. Lett. B 86 (1979) 297 [INSPIRE].
M. Carpentier and S. Davidson, Constraints on two-lepton, two quark operators, Eur. Phys. J. C 70 (2010) 1071 [arXiv:1008.0280] [INSPIRE].
LHCb collaboration, R. Aaij et al., Strong constraints on the rare decays B s → μ + μ − and B 0 → μ + μ −, Phys. Rev. Lett. 108 (2012) 231801 [arXiv:1203.4493] [INSPIRE].
T. Mori, Charged lepton flavour and dipole moments, PoS(EPS-HEP2011)028.
D. Binosi, J. Collins, C. Kaufhold and L. Theussl, JaxoDraw: a graphical user interface for drawing Feynman diagrams. Version 2.0 release notes, Comput. Phys. Commun. 180 (2009) 1709 [arXiv:0811.4113] [INSPIRE].
D. Binosi and L. Theussl, JaxoDraw: a graphical user interface for drawing Feynman diagrams, Comput. Phys. Commun. 161 (2004) 76 [hep-ph/0309015] [INSPIRE].
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1204.1275
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
Calibbi, L., Lalak, Z., Pokorski, S. et al. Universal constraints on low-energy flavour models. J. High Energ. Phys. 2012, 4 (2012). https://doi.org/10.1007/JHEP07(2012)004
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP07(2012)004