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) +/- 0.03(syst). 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.

T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons. PHYSICAL REVIEW LETTERS, 106(18), 181802-1-181802-8 [10.1103/PhysRevLett.106.181802].

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

BARRIA, PATRIZIA;GAROSI, PAOLA;RUFFINI, FABRIZIO;SCRIBANO, ANGELO;SQUILLACIOTI, PAOLA;
2011-01-01

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) +/- 0.03(syst). 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
T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons. PHYSICAL REVIEW LETTERS, 106(18), 181802-1-181802-8 [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/11365/40290
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