Measurement of the relative width difference of the $$ {B}^0\hbox{-} {\overline{B}}^0 $$ system with the ATLAS detector
Journal Article
·
· Journal of High Energy Physics (Online)
This study presents the measurement of the relative width difference ΔΓ d /Γ d of the $$ {B}^0\hbox{-} {\overline{B}}^0 $$ 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 ΔΓ d /Γ d is obtained by comparing the decay-time distributions of B 0 → J/ψK S and B 0 → J/ψK *0(892) decays. The result is ΔΓ d /Γ d = (-0.1±1.1 (stat.)± 0.9 (syst.)) × 10-2. Currently, this is the most precise single measurement of ΔΓ d /Γ d . Finally, it agrees with the Standard Model prediction and the measurements by other experiments.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- The ATLAS collaboration
- Grant/Contract Number:
- AC02-76SF00515; AC02-05CH11231
- OSTI ID:
- 1261151
- Alternate ID(s):
- OSTI ID: 1379377
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2016, Issue 6; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 7 works
Citation information provided by
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