The differential cross-section for the inclusive production of Psi(2S) mesons in pp collisions at sqrt(s)=7 TeV has been measured with the LHCb detector. The data sample corresponds to an integrated luminosity of 36 pb-1. The Psi(2S) mesons are reconstructed in the decay channels Psi(2S)->mu+mu- and Psi(2S)->J/Psi pi+ pi-, with the J/Psi meson decaying into two muons. Results are presented both for promptly produced Psi(2S) mesons and for those originating from b-hadron decays. In the kinematic range pT(Psi(2S))<=16 GeV/c and 2<=4.5 we measure sigma_prompt(Psi(2S))=1.44+-0.01(stat)+-0.12(syst)+0.20-0.40(pol) ub, where the last uncertainty on the prompt cross-section is due to the unknown Psi(2S) polarization. Recent QCD calculations are found to be in good agreement with our measurements. Combining the present result with the LHCb J /Psi measurements we determine the inclusive branching fraction B(b->Psi(2S)X)=(2.73+-0.06(stat)+-0.16(syst)+-0.24(BF))x10^-3, where the last uncertainty is due to the B(b->J/Psi X), B(J/Psi->mu+mu-) and B(Psi(2S)->e+e-) branching fraction uncertainties. measurements we determine the inclusive branching frac- tion B b → ψ(2S)X = 2.73 ± 0.06 (stat) ± 0.16 (syst) ± 0.24 (BF) × 10

Measurement of ψ (2S) meson production in pp collisions at √s =7 TeV / R., A., C., A.B., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., G., A., P., A.C., A. A., A., S., A., Y., A., J., A., R. B., A., O., A.G., F., A., L., A., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 72:8(2012), pp. 2100-1-2100-12. [10.1140/epjc/s10052-012-2100-4]

Measurement of ψ (2S) meson production in pp collisions at √s =7 TeV

BIZZETI, Andrea;
2012

Abstract

The differential cross-section for the inclusive production of Psi(2S) mesons in pp collisions at sqrt(s)=7 TeV has been measured with the LHCb detector. The data sample corresponds to an integrated luminosity of 36 pb-1. The Psi(2S) mesons are reconstructed in the decay channels Psi(2S)->mu+mu- and Psi(2S)->J/Psi pi+ pi-, with the J/Psi meson decaying into two muons. Results are presented both for promptly produced Psi(2S) mesons and for those originating from b-hadron decays. In the kinematic range pT(Psi(2S))<=16 GeV/c and 2<=4.5 we measure sigma_prompt(Psi(2S))=1.44+-0.01(stat)+-0.12(syst)+0.20-0.40(pol) ub, where the last uncertainty on the prompt cross-section is due to the unknown Psi(2S) polarization. Recent QCD calculations are found to be in good agreement with our measurements. Combining the present result with the LHCb J /Psi measurements we determine the inclusive branching fraction B(b->Psi(2S)X)=(2.73+-0.06(stat)+-0.16(syst)+-0.24(BF))x10^-3, where the last uncertainty is due to the B(b->J/Psi X), B(J/Psi->mu+mu-) and B(Psi(2S)->e+e-) branching fraction uncertainties. measurements we determine the inclusive branching frac- tion B b → ψ(2S)X = 2.73 ± 0.06 (stat) ± 0.16 (syst) ± 0.24 (BF) × 10
2012
72
8
2100-1
2100-12
Measurement of ψ (2S) meson production in pp collisions at √s =7 TeV / R., A., C., A.B., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., G., A., P., A.C., A. A., A., S., A., Y., A., J., A., R. B., A., O., A.G., F., A., L., A., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 72:8(2012), pp. 2100-1-2100-12. [10.1140/epjc/s10052-012-2100-4]
R., Aaij; C., Abellan Beteta; B., Adeva; M., Adinolfi; C., Adrover; A., Affolder; Z., Ajaltouni; J., Albrecht; F., Alessio; M., Alexander; G., Alkhazo...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/812729
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