Measurement of the $B^\pm$ production asymmetry and the $CP$ asymmetry in $B^\pm \to J/ψ K^\pm$ decaysстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 23 июня 2017 г.
Аннотация:The B±
meson production asymmetry in pp collisions is measured using B+→D¯0π+ decays. The data were recorded by the LHCb experiment during Run 1 of the LHC at centre-of-mass energies of s√= 7 and 8 TeV. The production asymmetries, integrated over transverse momenta in the range 2<pT<30 GeV/c, and rapidities in the range 2.1<y<4.5, are measured to be
Aprod(B+,s√=7TeV)Aprod(B+,s√=8TeV)=(−0.41±0.49±0.10)×10−2,=(−0.53±0.31±0.10)×10−2,
where the first uncertainties are statistical and the second are systematic. These production asymmetries are used to correct the raw asymmetries of B+→J/ψK+ decays, thus allowing a measurement of the CP asymmetry,
ACP=(0.09±0.27±0.07)×10−2.