High precision electroweak tests, such as deviations from the Standard Model expectations of the Lepton Flavor Universality (LFU) breaking in K -> lv(l) (with l = e or mu), represent a powerful tool to test the Standard Model and, hence, to constrain or obtain indirect hints of New Physics beyond it. We explore such a possibility within Supersymmetric theories. Interestingly enough, a process that in itself does not need lepton flavor violation to occur, i.e. the violation of mu - e non-universality in K. -> lv(l) proves to be quite effective in constraining not only relevant regions of SUSY models where lepton flavor is conserved, but even those where specific lepton flavor violating contributions arise. Indeed, a comparison with analogous bounds coming from tau lepton flavor violating decays shows the relevance of the measurement of R-K(e/mu) = Gamma(K -> ev)/Gamma (K ->mu v) to probe Lepton Flavor Violation in SUSY. We outline the role and the interplay of the direct New Physics searches at the LHC with the indirect searches performed by LFU tests.

Masiero, A., Paradisi, P., Petronzio, R. (2008). Anatomy and phenomenology of the lepton flavor universality in SUSY theories. JOURNAL OF HIGH ENERGY PHYSICS, 2008(11) [10.1088/1126-6708/2008/11/042].

Anatomy and phenomenology of the lepton flavor universality in SUSY theories

PETRONZIO, ROBERTO
2008-01-01

Abstract

High precision electroweak tests, such as deviations from the Standard Model expectations of the Lepton Flavor Universality (LFU) breaking in K -> lv(l) (with l = e or mu), represent a powerful tool to test the Standard Model and, hence, to constrain or obtain indirect hints of New Physics beyond it. We explore such a possibility within Supersymmetric theories. Interestingly enough, a process that in itself does not need lepton flavor violation to occur, i.e. the violation of mu - e non-universality in K. -> lv(l) proves to be quite effective in constraining not only relevant regions of SUSY models where lepton flavor is conserved, but even those where specific lepton flavor violating contributions arise. Indeed, a comparison with analogous bounds coming from tau lepton flavor violating decays shows the relevance of the measurement of R-K(e/mu) = Gamma(K -> ev)/Gamma (K ->mu v) to probe Lepton Flavor Violation in SUSY. We outline the role and the interplay of the direct New Physics searches at the LHC with the indirect searches performed by LFU tests.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
English
Con Impact Factor ISI
Supersymmetry Phenomenology
Masiero, A., Paradisi, P., Petronzio, R. (2008). Anatomy and phenomenology of the lepton flavor universality in SUSY theories. JOURNAL OF HIGH ENERGY PHYSICS, 2008(11) [10.1088/1126-6708/2008/11/042].
Masiero, A; Paradisi, P; Petronzio, R
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/33943
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