Measurement of the forward-backward asymmetry in the production of $B^{\pm}$ mesons in $p\bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV

Abstract : We present a measurement of the forward-backward asymmetry in the production of $B^{\pm}$ mesons, $A_{\rm FB}(B^{\pm})$, using $B^{\pm} \rightarrow J/\psi K^{\pm}$ decays in 10.4 ${\rm fb}^{-1}$ of $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV collected by the D0 experiment during Run II of the Tevatron collider. A non-zero asymmetry would indicate a preference for a particular flavor, i.e., $b$ quark or $\bar{b}$ anti-quark, to be produced in the direction of the proton beam. We extract $A_{\rm FB}(B^{\pm})$ from a maximum likelihood fit to the difference between forward- and backward-produced $B^{\pm}$ mesons. We measure an asymmetry consistent with zero: $A_{\rm FB}(B^{\pm})$ = [$-$0.24 $\pm$ 0.41 (stat) $\pm$ 0.19 (syst)]%.
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Physical Review Letters, American Physical Society, 2015, 114 (5), pp.051803. 〈10.1103/PhysRevLett.114.051803〉
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http://hal.in2p3.fr/in2p3-01082229
Contributeur : Emmanuelle Vernay <>
Soumis le : jeudi 13 novembre 2014 - 08:55:01
Dernière modification le : mardi 22 mai 2018 - 21:48:09

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V.M. Abazov, G. Sajot, J. Stark, S. Greder, F. Miconi, et al.. Measurement of the forward-backward asymmetry in the production of $B^{\pm}$ mesons in $p\bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV. Physical Review Letters, American Physical Society, 2015, 114 (5), pp.051803. 〈10.1103/PhysRevLett.114.051803〉. 〈in2p3-01082229〉

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