We report 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 a data sample corresponding to 1 fb(-1) of integrated luminosity, we obtain the first measurements of direct CP violation in bottom strange mesons, A(CP)(B-s(0) -> K- pi(+)) = +0.39 + 0.15(stat) +/- 0.08(syst), and bottom baryons, A(CP)(Lambda(0)(b) -> p pi(-)) = 0.03 +/- 0.17(stat) +/- 0.05(syst) and A(CP)(Lambda(0)(b) -> pK(-)) = +0.37 +/- 0.17(stat) +/- 0.03dsyst_. In addition, we measure CP violation in B-0 -> K+ pi(-) decays with 3.5 sigma significance, A(CP)(B-0 -> K+ pi(-)) = -0.086 +/- 0.023(stat) +/- 0.009(syst), in agreement with the current world average. Measurements of branching fractions of B-s(0) -> K+K- and B-0 -> pi(+)pi- decays are also updated.

Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons / T., A., B. a., G., S., A., D., A., A., A., A., A., J., A., G., A., J. a., A., A., A., T., A., A., A., J., A., W., A., B., A., A., A., F., A., W., B., A., B.G., V. e., B., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 106:18(2011). [10.1103/physrevlett.106.181802]

Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons

BAUCE, MATTEO;DE CECCO, Sandro;GIAGU, Stefano;MARGAROLI, Fabrizio;
2011

Abstract

We report 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 a data sample corresponding to 1 fb(-1) of integrated luminosity, we obtain the first measurements of direct CP violation in bottom strange mesons, A(CP)(B-s(0) -> K- pi(+)) = +0.39 + 0.15(stat) +/- 0.08(syst), and bottom baryons, A(CP)(Lambda(0)(b) -> p pi(-)) = 0.03 +/- 0.17(stat) +/- 0.05(syst) and A(CP)(Lambda(0)(b) -> pK(-)) = +0.37 +/- 0.17(stat) +/- 0.03dsyst_. In addition, we measure CP violation in B-0 -> K+ pi(-) decays with 3.5 sigma significance, A(CP)(B-0 -> K+ pi(-)) = -0.086 +/- 0.023(stat) +/- 0.009(syst), in agreement with the current world average. Measurements of branching fractions of B-s(0) -> K+K- and B-0 -> pi(+)pi- decays are also updated.
2011
01 Pubblicazione su rivista::01a Articolo in rivista
Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons / T., A., B. a., G., S., A., D., A., A., A., A., A., J., A., G., A., J. a., A., A., A., T., A., A., A., J., A., W., A., B., A., A., A., F., A., W., B., A., B.G., V. e., B., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 106:18(2011). [10.1103/physrevlett.106.181802]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/378784
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