August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【305】A new approach in the search for New Physics in b→sl+l- decays

Aug 31, 2021, 2:30 PM
Room B

Room B

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


Michele Atzeni (Universitaet Zuerich (CH))


Recent studies of rare semileptonic decays of beauty mesons reported some intriguing discrepancies with the SM predictions, which seem to form a coherent pattern. Of particular interest are the angular observable P5' of the B→Kμ+μ- decay and the suppression of the muon channel in the ratios of branching fractions of B+→K+μ+μ− to B+→K+e+e− transitions.
The proposed research aims to perform an unbinned likelihood amplitude fit of B→ K
l+l- decays with the full LHCb run-I/II dataset, simultaneously to the muon and electron channel. This approach intends to disentangle the hadronic-dependent part from a q2-independent New Physics(NP) contribution in a theoretically accurate and experimentally sensitive manner, establishing eventually an evidence of NP.

Primary authors

Andrea Mauri (Nikhef National institute for subatomic physics (NL)) Zhenzi Wang (Universitaet Zuerich (CH)) Rafael Silva Coutinho (Universitaet Zuerich (CH)) Nicola Serra (Universitaet Zuerich (CH)) Renato Quagliani (Centre National de la Recherche Scientifique (FR)) Jonas Eschle (Universitaet Zuerich (CH)) Michele Atzeni (Universitaet Zuerich (CH))

Presentation materials