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Report number arXiv:1310.7201 ; LHCB-PAPER-2013-054 ; CERN-PH-EP-2013-180 ; LHCB-PAPER-2013-054 ; CERN-PH-EP-2013-180
Title Measurements of indirect CP asymmetries in D0KK+ and D0ππ+ decays
Author(s) LHCb collaboration  Show all 659 authors
Publication 2014-01-31
Imprint 27 Oct 2013
Number of pages 9
In: Phys. Rev. Lett. 112 (2014) 041801
DOI 10.1103/PhysRevLett.112.041801
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; charm physics ; CP violation
Abstract A study of indirect CP violation in D0 mesons through the determination of the parameter AΓ is presented using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb1, collected with the LHCb detector and recorded at the centre-of-mass energy of 7 TeV at the LHC. The parameter AΓ is the asymmetry of the effective lifetimes measured in decays of D0 and ¯D0 mesons to the CP eigenstates KK+ and ππ+. Fits to the data sample yield AΓ(KK)=(0.35±0.62±0.12)×103 and AΓ(ππ)=(0.33±1.06±0.14)×103, where the first uncertainties are statistical and the second systematic. The results represent the world's best measurements of these quantities. They show no difference in AΓ between the two final states and no indication of CP violation.
Copyright/License publication: © 2014-2024 CERN (License: CC-BY-3.0)
preprint: © 2013-2024 CERN (License: CC-BY-3.0)



Corresponding record in: Inspire
Email contact: lalaine.barbon.strebel@cern.ch


 Záznam vytvorený 2013-10-29, zmenený 2024-08-17


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