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Explaining the Flavor Anomalies with a Vector Leptoquark (Moriond 2019 update)


Saturnino, Francesco; Crivellin, Andreas (2019). Explaining the Flavor Anomalies with a Vector Leptoquark (Moriond 2019 update). In: XXVII International Workshop on Deep-Inelastic Scattering and Related Subjects, Torino, Italy, 8 April 2019 - 12 April 2019.

Abstract

Several experiments revealed intriguing hints for lepton flavor universality (LFU) violating new physics (NP) in semi-leptonic B meson decays, mainly in b→cτν and b→sℓ+ℓ− transitions at the 3−5σ level. Leptoquarks (LQ) are prime candidates to address these anomalies as they contribute to semi-leptonic decays already at tree level while effects in other flavor observables, agreeing with the standard model (SM), are loop suppressed. In these proceedings we review the vector leptoquark SU(2)L singlet, contained in the famous Pati-Salam model, which is able to address both b→cτν and b→sμ+μ− data simultaneously. Due to the large couplings to tau leptons needed to account for the b→cτν data, sizable loop effects arise which we include in our phenomenological analysis. Updating our previous result with the recent measurements of LHCb and BELLE we find an even better fit to data than before.

Abstract

Several experiments revealed intriguing hints for lepton flavor universality (LFU) violating new physics (NP) in semi-leptonic B meson decays, mainly in b→cτν and b→sℓ+ℓ− transitions at the 3−5σ level. Leptoquarks (LQ) are prime candidates to address these anomalies as they contribute to semi-leptonic decays already at tree level while effects in other flavor observables, agreeing with the standard model (SM), are loop suppressed. In these proceedings we review the vector leptoquark SU(2)L singlet, contained in the famous Pati-Salam model, which is able to address both b→cτν and b→sμ+μ− data simultaneously. Due to the large couplings to tau leptons needed to account for the b→cτν data, sizable loop effects arise which we include in our phenomenological analysis. Updating our previous result with the recent measurements of LHCb and BELLE we find an even better fit to data than before.

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Additional indexing

Item Type:Conference or Workshop Item (Paper), not_refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Event End Date:12 April 2019
Deposited On:11 Dec 2019 15:00
Last Modified:14 Dec 2019 03:05
Publisher:SISSA
Series Name:PoS - Proceedings of Science
ISSN:1824-8039
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.22323/1.352.0163

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