Measurements of Direct CP -Violating Asymmetries in Charmless Decays of Bottom Baryons

Aaltonen, Timo Antero; Amerio, Silvia; Amidei, Dante E.; Anastassov, Anton Iankov; Annovi, Alberto; Antos, Jaroslav; Apollinari, Giorgio; Appel, Jeffrey A.; Arisawa, Tetsuo; Artikov, Akram Muzafarovich

doi:10.1103/PhysRevLett.113.242001

Measurements of Direct CP -Violating Asymmetries in Charmless Decays of Bottom Baryons

CDF

Collaboration

Mar 21, 2014

8 pages

Published in:

Phys.Rev.Lett. 113 (2014) 24, 242001

Published: Dec 9, 2014

e-Print:

1403.5586 [hep-ex]

DOI:

10.1103/PhysRevLett.113.242001

PDG:

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

\rightarrow

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

)

Report number:

FERMILAB-PUB-14-055-E-PPD

Experiments:

FNAL-E-0830

View in:

reference search73 citations

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Abstract: (APS)

We report final 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 the complete s=1.96 TeV proton-antiproton collisions data set, corresponding to 9.3 fb-1 of integrated luminosity, we measure A(Λb0→pπ-)=+0.06±0.07(stat)±0.03(syst) and A(Λb0→pK-)=-0.10±0.08(stat)±0.04(syst), compatible with no asymmetry. In addition we measure the CP-violating asymmetries in Bs0→K-π+ and B0→K+π- decays to be A(Bs0→K-π+)=+0.22±0.07(stat)±0.02(syst) and A(B0→K+π-)=-0.083±0.013(stat)±0.004(syst), respectively, which are significantly different from zero and consistent with current world averages.

Note:

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

14.20.Mr
14.40.Nd
11.30.Er
Lambda/b0: hadronic decay
anti-p p: scattering
asymmetry: CP: measured
Batavia TEVATRON Coll
B0: hadronic decay
B/s0: hadronic decay
charged particle: pair production

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