Measurement of the Semileptonic C P Asymmetry in B0-B¯ 0 Mixing
Abstract
The semileptonic C P asymmetry in B0-B¯ 0 mixing, asld, is measured in proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb-1 , recorded by the LHCb experiment. Semileptonic B0 decays are reconstructed in the inclusive final states D-μ+ and D*-μ+, where the D- meson decays into the K+π-π- final state and the D*- meson into the D¯ 0(→K+π-)π- final state. The asymmetry between the numbers of D(*)-μ+ and D(*)+μ- decays is measured as a function of the decay time of the B0 mesons. The C P asymmetry is measured to be asld=(-0.02 ±0.19 ±0.30 )%, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of asld to date and is consistent with the prediction from the standard model.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 2015
- DOI:
- 10.1103/PhysRevLett.114.041601
- Bibcode:
- 2015PhRvL.114d1601A
- Keywords:
-
- 11.30.Er;
- 13.20.He;
- 14.40.Nd;
- Charge conjugation parity time reversal and other discrete symmetries;
- Decays of bottom mesons;
- Bottom mesons