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Measurement of direct CP violation parameters in B-+/- -> J/psi K-+/- and B-+/- -> J/psi pi(+/-) decays with 10.4 fb(-1) of Tevatron data
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2013 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 110, no 24, 241801- p.Article in journal (Refereed) Published
Abstract [en]

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 A(J/psi K) = [0.59 +/- 0.37]%, which is the most precise measurement to date, and A(J/psi pi) = [-4.2 +/- 4.5]%. Both measurements are consistent with standard model predictions.

Place, publisher, year, edition, pages
2013. Vol. 110, no 24, 241801- p.
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Natural Sciences
URN: urn:nbn:se:uu:diva-204109DOI: 10.1103/PhysRevLett.110.241801ISI: 000320307400004OAI: diva2:637805
Available from: 2013-07-22 Created: 2013-07-22 Last updated: 2013-09-27Bibliographically approved

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Buszello, Claus P.
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High Energy Physics
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