28–31 Aug 2018
EPFL
Europe/Zurich timezone

【303】 Tests of Lepton flavour universality in bs+ decays at LHCb

29 Aug 2018, 14:00
15m
CE 3 (EPFL)

CE 3

EPFL

Talk Nuclear, Particle- and Astrophysics (TASK) Nuclear, Particle- & Astrophysics (TASK)

Speaker

Elena Graverini (Universitaet Zuerich (CH))

Description

One of the fundamental properties of the Standard Model (SM) is lepton flavour universality (LFU): particles couple equally to the three lepton generations. Rare decays governed by the bs+, which are loop- and CKM-suppressed, are extremely sensitive to New Physics scenarios introducing particles preferentially coupling to the second or third generations, and they have been thoroughly studied at LHCb. In particular, measurement of ratios of branching fractions of BX decays, with X being a system containing a strange meson and either a muon or electron pair, indicate significant deviation from theory expectations, hinting at possible LFU violation. This talk will review past and ongoing LHCb analyses aimed at elucidating the nature of this phenomenon.

Primary author

Elena Graverini (Universitaet Zuerich (CH))

Presentation materials