Lucia Grillo (Manchester): A new piece of the |V(u,c)b| long-standing puzzle

Wednesday 13 Jan 2021, 15:30 → 16:30 Europe/London

Abstract:
Semileptonic b-hadron decays proceed via charged-current interactions and provide powerful probes for testing the Standard Model of particle physics and for searching for New Physics effects. The large branching fractions, coupled with excellent particle identification capability and accurate reconstruction of decay vertices, enable the LHCb experiment to perform high-precision measurements of many key quantities, such as Cabibbo-Kobayashi-Maskawa (CKM) matrix elements, b-hadron properties, and Lepton Universality.
The recent first observation of the suppressed Bs → Kμν decay is presented. These decays, together with Bs→ Dsμν decays, and theory inputs, are used to measure the ratio of the CKM matrix elements |Vub|/|Vcb|, improving upon the current experimental precisions. The branching fraction ratios measured in two momentum transfer regions provide new inputs to understand the hadronic effects.

Connection via Zoom:

Topic: Liverpool HEP Seminar
https://liverpool-ac-uk.zoom.us/j/99542014031?pwd=eXBxUVJkWEZKN0NWcEpJMTRHYmxDZz09

Meeting ID: 995 4201 4031
Password: 6R$m5uB#

 

VubSeminar_lgrillo.pdf