Measurement of direct CP violation parameters in B+-J/?K+- and B+-J/??+- decays with 10.4 fb-1 of Tevatron data

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00397639" target="_blank" >RIV/68378271:_____/13:00397639 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevLett.110.241801" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.110.241801</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.110.241801" target="_blank" >10.1103/PhysRevLett.110.241801</a>

Result language
angličtina
Original language name
Measurement of direct CP violation parameters in B+-J/?K+- and B+-J/??+- decays with 10.4 fb-1 of Tevatron data
Original language description
We present a measurement of the direct CP-violating charge asymmetry in B^+/- mesons decaying to J/psi K^+/- and J/psi pi^+/- where J/psi decays to mu^+ mu^-, using the full Run II data set of 10.4 fb^-1 of proton-antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. A difference in the yield of B^- and B^+ mesons in these decays is found by fitting to the difference between their reconstructed invariant mass distributions resulting in asymmetries of ajpk =[0.59 +/- 0.37]%, which is the most precise measurement to date, and ajppi= [-4.2 +/- 4.5]%. Both measurements are consistent with standard model predictions.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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Project
<a href="/en/project/LG12006" target="_blank" >LG12006: Collaboration on NOvA and D0 Experiments at Fermi National Laboratory, USA</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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