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 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)×10-2, Aprod(B+,s=8 TeV)=(-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(B+→J/ψK+)=(0.09±0.27±0.07)×10-2. © 2017 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the «https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Measurement of the B± production asymmetry and the CP asymmetry in B±→J/ψK± decays
Adinolfi, M.;Alessio, F.;Barlow, R. J.;Battista, V.;Bedeschi, F.;Bowen, E.;Burr, C.;Campana, P.;Carboni, G.;Charles, M.;Coco, V.;Collazuol, G.;Contu, A.;Di Canto, A.;Frank, M.;Gallorini, S.;Gandini, P.;Gascon, D.;Graziani, G.;He, J.;Lazzeroni, C.;Manca, G.;Marino, P.;Martin, M.;Morello, M. J.;Penso, G.;Perret, P.;Punzi, G.;Rama, M.;Rotondo, M.;Sarti, A.;Satriano, C.;Satta, A.;Sergi, A.;Serrano, J.;Smith, J.;Smith, M.;Stracka, S.;Tomassetti, L.;Tonelli, D.;Vacca, C.;Valenti, G.;Veltri, M.;Vieira, D.;Wallace, R.;Wilkinson, G.;Xing, Z.;Yang, Z.;Zucchelli, S.
AbstractThe 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 center-of-mass energies of s=7 and 8 TeV. The production asymmetries, integrated over transverse momenta in the range 2
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