A search for time-integrated CP violation in D-0 -> h(-)h(+) (h = K, pi) decays is presented using 0.62 fb(-1) of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*(+) -> D-0 pi(+) and D*(-) -> (D) over bar (0)pi(-) decay chains. The difference in CP asymmetry between D-0 -> K-K+ and D-0 -> pi(-)pi(+), Delta A(CP) A(CP)(K-K+) - A(CP)(pi(-)pi(+)), is measured to be [-0.82 +/- 0.21(stat) +/- 0.11(syst) +/-]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations. RI Coca, Cornelia/B-6015-2012; Galli, Domenico/A-1606-2012; Eklund, Lars/C-7709-2012; Carbone, Angelo/C-8289-2012; Soler, Paul/E-8464-2011; Leflat, Alexander/D-7284-2012; Petrolini, Alessandro/H-3782-2011; Sarti, Alessio/I-2833-2012; de Paula, Leandro/I-9278-2012; manca, giulia/I-9264-2012; Patrignani, Claudia/C-5223-2009; Marconi, Umberto/J-2263-2012; de Simone, Patrizia/J-3549-2012; Cardini, Alessandro/J-5736-2012; Teodorescu, Eliza/K-3044-2012

Evidence for CP Violation in Time- Integrated D-0 -> h(-)h(+) Decay Rates

Dettori F;MANCA, GIULIA;OLDEMAN, RUDOLF GERHARD CHRISTIAAN;SAITTA, BIAGIO;
2012-01-01

Abstract

A search for time-integrated CP violation in D-0 -> h(-)h(+) (h = K, pi) decays is presented using 0.62 fb(-1) of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*(+) -> D-0 pi(+) and D*(-) -> (D) over bar (0)pi(-) decay chains. The difference in CP asymmetry between D-0 -> K-K+ and D-0 -> pi(-)pi(+), Delta A(CP) A(CP)(K-K+) - A(CP)(pi(-)pi(+)), is measured to be [-0.82 +/- 0.21(stat) +/- 0.11(syst) +/-]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations. RI Coca, Cornelia/B-6015-2012; Galli, Domenico/A-1606-2012; Eklund, Lars/C-7709-2012; Carbone, Angelo/C-8289-2012; Soler, Paul/E-8464-2011; Leflat, Alexander/D-7284-2012; Petrolini, Alessandro/H-3782-2011; Sarti, Alessio/I-2833-2012; de Paula, Leandro/I-9278-2012; manca, giulia/I-9264-2012; Patrignani, Claudia/C-5223-2009; Marconi, Umberto/J-2263-2012; de Simone, Patrizia/J-3549-2012; Cardini, Alessandro/J-5736-2012; Teodorescu, Eliza/K-3044-2012
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/68805
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