Measurement of the forward-backward asymmetry in the production of B.sup. ±./sup. mesons in pp¯ collisions at √s = 1.96 TeV

0452120 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … celkem 364 autorů
Measurement of the forward-backward asymmetry in the production of B ^± mesons in pp¯ collisions at √s = 1.96 TeV.
Physical Review Letters. Roč. 114, č. 5 (2015), "051803-1"-"051803-8". ISSN 0031-9007. E-ISSN 1079-7114
Institucionální podpora: RVO:68378271
Klíčová slova: meson * Batavia TEVATRON Coll * antiquark * flavor * quark * production * rapidity * D0
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 7.645, rok: 2015

We present a measurement of the forward-backward asymmetry in the production of B± mesons, AFB(B±), using B±→J/ψK± decays in 10.4 fb−1 of pp¯ collisions at s√=1.96 TeV collected by the D0 experiment during Run II of the Tevatron collider. A nonzero asymmetry would indicate a preference for a particular flavor, i.e., b quark or b¯ antiquark, to be produced in the direction of the proton beam. We extract AFB(B±) from a maximum likelihood fit to the difference between forward- and backward-produced B± mesons. We measure an asymmetry consistent with zero: AFB(B±) = [−0.24 ± 0.41 (stat) ± 0.19 (syst)]%.
Trvalý link: http://hdl.handle.net/11104/0253141