Precision measurement of the B0 oscillation frequency by LHCb

by Basem Khanji (Universita & INFN, Milano-Bicocca (IT))

Tuesday 22 Mar 2016, 11:00 → 11:50 Europe/Zurich

500/1-001 - Main Auditorium (CERN)

LHCb has recently measured the oscillation frequency of B⁰ mesons, Delta m_d, with unprecedented precision. The measurement is performed using the semi-leptonic decays B⁰ to D^- μ⁺ν_μ, with D^- to K⁺ π^- π^-, and B⁰ to D^*- μ⁺ν_μ, with D^*- to Dbar⁰ (K⁺π^-) π^-.

The result is Delta m_d = (505.0 ± 2.1 ± 1.0) ns^-1. This is the most precise measurement of Delta m_d to date, with an overall uncertainty that is smaller than that of the current world average. The details of the measurement will be discussed in this seminar, notably including flavour tagging, which is one of the key aspects of the analysis.

CERNLHCSeminar2.22.03.2016.pdf

LHC_Seminar_BKhanji.pdf