The CP-violating charge asymmetry in B± → φK± decays is measured in a sample of pp collisions at 7 TeV centre-of-mass energy, corresponding to an integrated luminosity of 1.0 fb-1 collected by the LHCb experiment. The result is ACP( B± → φK±) = 0.022 ± 0.021 ± 0.009, where the first uncertainty is statistical and the second systematic. In addition, a search for the B± → φπ± decay mode is performed, using the B± → φK± decay rate for normalization. An upper limit on the branching fraction β(B± → φπ±) < 1.5 × 10-7 is set at 90% confidence level.
|Number of pages||10|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Early online date||22 Nov 2013|
|Publication status||Published - 20 Jan 2014|
ASJC Scopus subject areas
- Nuclear and High Energy Physics