Measurement of the relative width difference of the B-0-(B)over-bar(0) system with the ATLAS detector

Aad, G.; Abbott, B.; Adomeit, Stefanie; Becker, S. und Biebel, Otmar (2016): Measurement of the relative width difference of the B-0-(B)over-bar(0) system with the ATLAS detector. In: Journal of High Energy Physics, No. 6, 081

Abstract

This paper presents the measurement of the relative width difference Delta Gamma(d)/Gamma(d) of the B-0-(B) over bar (0) system using the data collected by the Lambda TLAS experiment at the LHC in pp collisions at root s = 7 TeV and root s= 8 TeV and corresponding to an integrated luminosity of 25.2 fb(-1). The value of Delta Gamma(d)/Gamma(d) is obtained by comparing the decay-time distributions of B-0 -> J/Psi K-S and (B) over bar (0) -> J/Psi K*(0)(892) decays. The result is Delta Gamma(d)/Gamma(d) = (-0.1 +/- 1.1 (stat.) +/- 0.9 (syst.)) x 10(-2). Currently, this is the most precise single measurement of AFd/Fd. It agrees with the Standard Model prediction and the measurements by other experiments.

• Item Type: Journal article
• Faculties: Physics
• Subjects: 500 Science > 530 Physics
• ISSN: 1029-8479
• Annotation: ATLAS Collaboration: weitere AutorInnen siehe PDF
• Language: English