Back to Search
Start Over
Measurement of the direct CP-violating charge asymmetry in Ds ± → ϕ π ± decays.
- Source :
-
Physical review letters [Phys Rev Lett] 2014 Mar 21; Vol. 112 (11), pp. 111804. Date of Electronic Publication: 2014 Mar 21. - Publication Year :
- 2014
-
Abstract
- We present a measurement of the direct CP-violating charge asymmetry in Ds+ → ϕ π(±) decays where the ϕ 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.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 112
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 24702352
- Full Text :
- https://doi.org/10.1103/PhysRevLett.112.111804