Measurement of the relative width difference of the B0-B¯¯¯¯0 system with the ATLAS detector

K Hara; S. H Kim; H Okawa; K Sato; F Ukegawa; ATLAS Collaboration

doi:10.1007/JHEP06(2016)081

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Measurement of the relative width difference of the B0-B¯¯¯¯0 system with the ATLAS detector

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Measurement of the relative width difference of the B0-B¯¯¯¯0 system with the ATLAS detector

K Hara, S. H Kim, H Okawa, K Sato, F Ukegawa and ATLAS Collaboration

Journal of high energy physics, Vol.2016(6), 81

06/01/2016

DOI: 10.1007/JHEP06(2016)081

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Abstract

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.

Details

Title: Subtitle: Measurement of the relative width difference of the B0-B¯¯¯¯0 system with the ATLAS detector
Creators: K Hara
S. H Kim
H Okawa
K Sato
F Ukegawa
ATLAS Collaboration
Contributors: U Mallik (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Journal of high energy physics, Vol.2016(6), 81
DOI: 10.1007/JHEP06(2016)081
ISSN: 1029-8479
Publisher: Springer
Language: English
Date published: 06/01/2016
Academic Unit: Physics and Astronomy
Record Identifier: 9984200045402771

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