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

AuthorsAaltonen, T.; Álvarez González, B.; Casal, Bruno ; Cuevas, Javier ; Gómez, G. ; Palencia, Enrique ; Rodrigo, Teresa ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; Vizán, J.
Issue DateMay-2011
PublisherAmerican Physical Society
CitationPhysical Review Letters 106(18): 181802 (2011)
AbstractWe 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, 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.
Description8 páginas, 2 figuras, 1 tabla.-- PACS numbers: 13.25.Hw, 11.30.Er, 14.20.Mr, 14.40.Nd.-- CDF Collaboration: et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.106.181802
Appears in Collections:(IFCA) Artículos
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