The production of J/psi mesons in proton-proton collisions at root s = 7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/psi production is measured as a function of the J/psi transverse momentum p(T) and rapidity y in the fiducial region p(T) is an element of [0; 14] GeV/c and y is an element of [2.0; 4.5]. The differential cross-section and fraction of J/psi from b-hadron decays are also measured in the same p(T) and y ranges. The analysis is based on a data sample corresponding to an integrated luminosity of 5.2 pb(-1). The measured cross-sections integrated over the fiducial region are 10.52 +/- 0.04 +/- 1.40(-2.20)(+1.64) mu b for prompt J/psi production and 1.14 +/- 0.01 +/- 0.16 mu b for J/psi from b-hadron decays, where the first uncertainty is statistical and the second systematic. The prompt J/psi production cross-section is obtained assuming no J/psi polarisation and the third error indicates the acceptance uncertainty due to this assumption.

Measurement of J/psi production in pp collisions at root s=7 TeV / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., P. A., C., A. A., A., S., A., Y., A., J., A., J., A., R. B., A., O. A., G., L., A., M., A., E., A., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 71:5(2011), pp. 431-440. [10.1140/epjc/s10052-011-1645-y]

Measurement of J/psi production in pp collisions at root s=7 TeV

G. Casse;PENSO, Gianni;SARTI, ALESSIO;SCIUBBA, Adalberto;
2011

Abstract

The production of J/psi mesons in proton-proton collisions at root s = 7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/psi production is measured as a function of the J/psi transverse momentum p(T) and rapidity y in the fiducial region p(T) is an element of [0; 14] GeV/c and y is an element of [2.0; 4.5]. The differential cross-section and fraction of J/psi from b-hadron decays are also measured in the same p(T) and y ranges. The analysis is based on a data sample corresponding to an integrated luminosity of 5.2 pb(-1). The measured cross-sections integrated over the fiducial region are 10.52 +/- 0.04 +/- 1.40(-2.20)(+1.64) mu b for prompt J/psi production and 1.14 +/- 0.01 +/- 0.16 mu b for J/psi from b-hadron decays, where the first uncertainty is statistical and the second systematic. The prompt J/psi production cross-section is obtained assuming no J/psi polarisation and the third error indicates the acceptance uncertainty due to this assumption.
2011
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of J/psi production in pp collisions at root s=7 TeV / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., P. A., C., A. A., A., S., A., Y., A., J., A., J., A., R. B., A., O. A., G., L., A., M., A., E., A., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 71:5(2011), pp. 431-440. [10.1140/epjc/s10052-011-1645-y]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/407648
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