Document Type
Article
Publication Date
5-6-2011
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 1fb-1 of integrated luminosity, we obtain the first measurements of direct CP violation in bottom strange mesons, ACP(Bs0→K -π+)=+0.39±0.15(stat)±0.08(syst), and bottom baryons, ACP(Λb0→pπ-)=+0. 03±0.17(stat)±0.05(syst) and ACP(Λb0→ pK-)=+0.37±0.17(stat)±0.03(syst). In addition, we measure CP violation in B0→K+π- decays with 3.5σ significance, ACP(B0→K+π-)=- 0.086±0.023(stat)±0.009(syst), in agreement with the current world average. Measurements of branching fractions of Bs0→K+K - and B0→π+π- decays are also updated. © 2011 American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Recommended Citation
Aaltonen, T., Álvarez González, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Appel, J., Apresyan, A., Arisawa, T., Artikov, A., Asaadi, J., Ashmanskas, W., Auerbach, B., Aurisano, A., Azfar, F., Badgett, W., Barbaro-Galtieri, A., Barnes, V., Barnett, B., Barria, P., Bartos, P., Bauce, M., Bauer, G., Bedeschi, F., Beecher, D., & Behari, S. (2011). Measurements of direct CP violating asymmetries in charmless decays of strange bottom mesons and bottom baryons. Physical Review Letters, 106 (18) https://doi.org/10.1103/PhysRevLett.106.181802