The B± meson production asymmetry in pp collisions is measured using B+âD-0Ï+ decays. The data were recorded by the LHCb experiment during Run 1 of the LHC at center-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=7 TeV)=(-0.41±0.49±0.10)Ã10-2, Aprod(B+,s=8 TeV)=(-0.53±0.31±0.10)Ã10-2, where the first uncertainties are statistical and the second are systematic. These production asymmetries are used to correct the raw asymmetries of B+âJ/ÏK+ decays, thus allowing a measurement of the CP asymmetry, ACP(B+âJ/ÏK+)=(0.09±0.27±0.07)Ã10-2.
Measurement of the B± production asymmetry and the CP asymmetry in B±→J/ψK± decays
De Serio, M.;Pappagallo, M.;
2017-01-01
Abstract
The B± meson production asymmetry in pp collisions is measured using B+âD-0Ï+ decays. The data were recorded by the LHCb experiment during Run 1 of the LHC at center-of-mass energies of s=7 and 8 TeV. The production asymmetries, integrated over transverse momenta in the range 2I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.