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10.1103-PhysRevD.89.092009.pdf (752.37 kB)

Measurement of the parity-violating asymmetry parameter ab and the helicity amplitudes for the decay ?0b?J/??0 with the ATLAS detector

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posted on 2023-06-09, 06:05 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, et al. The ATLAS Collaboration
A measurement of the parity-violating decay asymmetry parameter, ab, and the helicity amplitudes for the decay ?0b?J/?(µ+µ-)?0(pp-) is reported. The analysis is based on 1400 ?0b and ¯?0b baryons selected in 4.6??fb-1 of proton–proton collision data with a center-of-mass energy of 7 TeV recorded by the ATLAS experiment at the LHC. By combining the ?0b and ¯?0b samples under the assumption of CP conservation, the value of ab is measured to be 0.30±0.16(stat)±0.06(syst). This measurement provides a test of theoretical models based on perturbative QCD or heavy-quark effective theory.

Funding

ATLAS; G0275; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/I006048/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review D

ISSN

2470-0010

Publisher

American Physical Society

Issue

092009

Volume

89

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

2017-05-03

First Open Access (FOA) Date

2017-05-03

First Compliant Deposit (FCD) Date

2017-05-03

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