# Measurement of the charge asymmetry in $B^{\pm}\rightarrow \phi K^{\pm}$ and search for $B^{\pm}\rightarrow \phi \pi^{\pm}$ decays

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## Abstract

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 B(B±→ϕπ±)
Original language English Aaij:2013lja 85-94 10 Physics Letters B 728 15 Sep 2013 https://doi.org/10.1016/j.physletb.2013.11.036 Published - 20 Jan 2014

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• ### GRIDPP4 TRANCHE-II SCOTGRID-EDINBURGH STAFF GRANT

Clarke, P.

STFC

1/04/1330/09/15

Project: Research