Measurement of the Direct CP-violating Charge Asymmetry in D-s(+/-) -> Phi pi(+/-) Decays
2014 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 112, no 11, 111804- p.Article in journal (Refereed) Published
We present a measurement of the direct CP-violating charge asymmetry in D-s(+) -> phi pi(+/-) decays where the phi meson decays to K+ K-, using the full Run II data set with an integrated luminosity of 10.4 fb(-1) of proton- antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. The normalized difference A(CP) in the yield of D-s(+) and D-s(-) mesons in these decays is measured by fitting the difference between their reconstructed invariant mass distributions. This results in an asymmetry of A(CP) = [-0.38 +/- 0.27]%, which is the most precise measurement of this quantity to date. The result is consistent with the standard model prediction of zero CP asymmetry in this decay.
Place, publisher, year, edition, pages
2014. Vol. 112, no 11, 111804- p.
IdentifiersURN: urn:nbn:se:uu:diva-223884DOI: 10.1103/PhysRevLett.112.111804ISI: 000333163200003OAI: oai:DiVA.org:uu-223884DiVA: diva2:715608