We report final measurements of direct CP--violating asymmetries in charmless decays of neutral bottom hadrons to pairs of charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using the complete √s=1.96 TeV proton-antiproton collisions data set, corresponding to 9.3 fb−1 of integrated luminosity, we measure A(Λ0b→pπ−)=+0.06±0.07(stat)±0.03(syst) and A(Λ0b→pK−)=−0.10±0.08(stat)±0.04(syst), compatible with no asymmetry. In addition we measure the CP--violating asymmetries in B0s→K−π+ and B0→K+π− decays to be A(B0s→K−π+)=+0.22±0.07stat)±0.02(syst) and A(B0→K+π−)=−0.083±0.013(stat)±0.004(syst), respectively, which are significantly different from zero and consistent with current world averages.

T. Aaltonen, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, et al. (2014). Measurements of Direct CP-Violating Asymmetries in Charmless Decays of Bottom Baryons. PHYSICAL REVIEW LETTERS, 113, 242001-1-242001-8 [10.1103/PhysRevLett.113.242001].

Measurements of Direct CP-Violating Asymmetries in Charmless Decays of Bottom Baryons

BRIGLIADORI, LUCA;CASTRO, ANDREA;MOGGI, NICCOLO';MUSSINI, MANUEL;ZUCCHELLI, STEFANO
2014

Abstract

We report final measurements of direct CP--violating asymmetries in charmless decays of neutral bottom hadrons to pairs of charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using the complete √s=1.96 TeV proton-antiproton collisions data set, corresponding to 9.3 fb−1 of integrated luminosity, we measure A(Λ0b→pπ−)=+0.06±0.07(stat)±0.03(syst) and A(Λ0b→pK−)=−0.10±0.08(stat)±0.04(syst), compatible with no asymmetry. In addition we measure the CP--violating asymmetries in B0s→K−π+ and B0→K+π− decays to be A(B0s→K−π+)=+0.22±0.07stat)±0.02(syst) and A(B0→K+π−)=−0.083±0.013(stat)±0.004(syst), respectively, which are significantly different from zero and consistent with current world averages.
2014
T. Aaltonen, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, et al. (2014). Measurements of Direct CP-Violating Asymmetries in Charmless Decays of Bottom Baryons. PHYSICAL REVIEW LETTERS, 113, 242001-1-242001-8 [10.1103/PhysRevLett.113.242001].
T. Aaltonen;S. Amerio;D. Amidei;A. Anastassov;A. Annovi;J. Antos;G. Apollinari;J. A. Appel;T. Arisawa;A. Artikov;J. Asaadi;W. Ashmanskas;B. Auerbach;A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/414772
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