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

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

CDF

Collaboration

Mar, 2011

7 pages

Published in:

Phys.Rev.Lett. 106 (2011) 181802

e-Print:

1103.5762 [hep-ex]

DOI:

10.1103/PhysRevLett.106.181802

PDG:

\mathit A_{CP}({{\mathit \Lambda}_{{{b}}}}

\rightarrow

{{\mathit p}}{{\mathit \pi}^{-}}

Report number:

FERMILAB-PUB-11-151-PPD

Experiments:

FNAL-E-0830

View in:

reference search93 citations

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Abstract: (arXiv)

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(BsKpi) = +0.39 +- 0.15 stat +- 0.08 syst, and bottom baryons, A_CP(Lb->ppi) = +0.03 +- 0.17 stat +- 0.05 syst and A_CP(Lb->pK) = +0.37 +- 0.17 +- 0.03 syst. In addition, we measure CP violation in Bd-->Kpi decays with 3.5sigma significance, A_CP(B->Kpi) = -0.086 +- 0.023 stat +- 0.009 syst, in agreement with the current world average. Measurements of branching fractions of Bs-->K+K- and B0-->pi+pi- decays are also updated.

Note:

7 pages, 2 figures, 1 table. Accepted by Phys. Rev. Lett

11.30.Er
14.40.Nd
14.20.Mr
13.25.Hw
bottom meson: rare decay
CP: violation
CDF
anti-p p: interaction
bottom: pair production
Lambda/b0: rare decay

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