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Measurement of the CP-violating phase ?s and the Bs0 meson decay width difference with Bs0???J/?? decays in ATLAS

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posted on 2023-06-09, 03:42 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, C T Potter, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, et al. The Atlas Collaboration
A measurement of the Bs0 decay parameters in the Bs0???J/?? channel using an integrated luminosity of 14.3 fb-1 collected by the ATLAS detector from 8 TeV pp collisions at the LHC is presented. The measured parameters include the CP -violating phase ?s, the decay width Gs and the width difference between the mass eigenstates ?Gs. The values measured for the physical parameters are statistically combined with those from 4.9 fb-1 of 7 TeV data, leading to the following: ? s =-0.090±0.078(stat.)±0.041(syst.)rad ?G s =0.085±0.011(stat.)±0.007(syst.)ps -1 G s =0.675±0.003(stat.)±0.003(syst.)ps -1 In the analysis the parameter ?Gs is constrained to be positive. Results for ?s and ?Gs are also presented as 68% and 95% likelihood contours in the ?s-?Gs plane. Also measured in this decay channel are the transversity amplitudes and corresponding strong phases. All measurements are in agreement with the Standard Model predictions.

History

Publication status

  • Published

File Version

  • Published version

Journal

Journal of High Energy Physics

ISSN

1029-8479

Publisher

Springer Verlag

Issue

2016

Volume

08

Page range

147

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Experimental Particle Physics Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-10-25

First Open Access (FOA) Date

2016-10-25

First Compliant Deposit (FCD) Date

2016-10-24

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