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Search for CP violation in D+ -> phi pi+ and Ds+ -> Ks pi+ decays

Abstract : A search for CP violation in D+ -> phi pi+ decays is performed using data collected in 2011 by the LHCb experiment corresponding to an integrated luminosity of 1.0 fb^{-1} at a centre of mass energy of 7 TeV. The CP-violating asymmetry is measured to be (-0.04+/-0.14+/-0.13)% for candidates with K-K+ mass within 20 MeV/c^{2} of the phi meson mass. A search for a CP-violating asymmetry that varies across the phi mass region of the D+ -> K-K+pi+ Dalitz plot is also performed, and no evidence for CP violation is found. In addition, the CP asymmetry in the Ds+ -> Ks pi+ decay is measured to be (0.61+/-0.83+/-0.13)%.
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Contributor : Sabine Starita <>
Submitted on : Thursday, March 21, 2013 - 10:22:43 AM
Last modification on : Tuesday, April 20, 2021 - 12:00:03 PM

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R. Aaij, Y. Amhis, S. Barsuk, O. Callot, J. He, et al.. Search for CP violation in D+ -> phi pi+ and Ds+ -> Ks pi+ decays. Journal of High Energy Physics, Springer, 2013, 06, pp.112. ⟨10.1007/JHEP06(2013)112⟩. ⟨in2p3-00803110⟩



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