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

Mullier, Geoffrey; Haug, Sigve; Weber, Michael; Meloni, Federico; Cervelli, Alberto; Beck, Hans Peter; Stucci, Stefania; Ereditato, Antonio (2016). Measurement of the relative width difference of the B⁰-B⁰ system with the ATLAS detector. Journal of High Energy Physics, 2016(6) Springer 10.1007/JHEP06(2016)081

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This paper presents the measurement of the relative width difference ΔΓd/Γd of the B⁰-B⁰ 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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Haug, Sigve; Weber, Michael and Beck, Hans Peter

Subjects:

500 Science > 530 Physics
500 Science > 510 Mathematics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Annette Krebs-Wegenast

Date Deposited:

04 Aug 2017 10:08

Last Modified:

06 Aug 2017 02:17

Publisher DOI:

10.1007/JHEP06(2016)081

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt.

BORIS DOI:

10.7892/boris.99951

URI:

https://boris.unibe.ch/id/eprint/99951

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