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B Meson Anomalies in a Pati-Salam Model within the Randall-Sundrum Background

Blanke, Monika; Crivellin, Andreas

Lepton number as a fourth color is the intriguing theoretical idea of the famous Pati-Salam (PS) model. While in conventional PS models, the symmetry breaking scale and the mass of the resulting vector leptoquark are stringently constrained by KL→μe and K→πμe, the scale can be lowered to a few TeV by adding vectorlike fermions. Furthermore, in this case, the intriguing hints for lepton flavor universality violation in b→sμ+μ− and b→cτν processes can be addressed. Such a setup is naturally achieved by implementing the PS gauge group in the five-dimensional Randall-Sundrum background. The PS symmetry is broken by boundary conditions on the fifth dimension, and the resulting massive vector leptoquark automatically has the same mass scale as the vectorlike fermions and all other resonances. We consider the phenomenology of this model in the context of the hints for lepton flavor universality violation in semileptonic B decays. Assuming flavor alignment in the down sector, we find that in b→sℓ+ℓ− transitions, the observed deviations from the standard model predictions [including R(K) and R(K∗)] can be explained with natural values for the free parameters of the model. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000084373
Veröffentlicht am 10.07.2018
DOI: 10.1103/PhysRevLett.121.011801
Zitationen: 109
Web of Science
Zitationen: 93
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Kernphysik (IKP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 0031-9007, 1079-7114
KITopen-ID: 1000084373
HGF-Programm 51.01.01 (POF III, LK 01) Teilchenphysik
Erschienen in Physical review letters
Verlag American Physical Society (APS)
Band 121
Heft 1
Seiten Artikel 011801
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 03.07.2018
Nachgewiesen in Scopus
Web of Science
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