INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Measurement of the relative width difference of the B0-B¯0 system with the ATLAS detector
Autor/es:
F. MONTICELLI; ATLAS
Revista:
JOURNAL OF HIGH ENERGY PHYSICS
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2016
ISSN:
1126-6708
Resumen:
This paper presents the measurement of the relative width difference ΔΓd /Γd of the B0-B¯¯¯¯0 system using the data collected by the ATLAS experiment at the LHC in pp collisions at s√=7 TeV and s√=8 TeV and corresponding to an integrated luminosity of 25.2 fb−1. The value of ΔΓd /Γd is obtained by comparing the decay-time distributions of B0 → J/ψKS and B0 → J/ψK∗0(892) decays. The result is ΔΓd /Γd = (−0.1±1.1 (stat.)± 0.9 (syst.)) × 10−2. Currently, this is the most precise single measurement of ΔΓd /Γd . It agrees with the Standard Model prediction and the measurements by other experiments.