The production of Y(1S), Y(2S) and Y(3S) mesons in proton-proton collisions at the centre-of-mass energy of sqrt(s) = 7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb-1 collected at the Large Hadron Collider. The Υ mesons are recon-structed in the decay mode Υ -> mu+ mu- and the signal yieldsare extracted from a fit to the mu+ mu- invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the Υ transverse momentum pT and rapidity y, over the range pT < 15 GeV/c and 2.0 < y < 4.5. The cross-sections times branching fractions, integrated over these kinematic ranges, are measured to besigma(pp -> Y(1S)X × B(Y(1S) -> mu+ mu-) = (2.29+.0.01+-0.10+0.19-0.37) nb,sigma(pp -> Y(2S)X × B(Υ(2S) -> mu+ mu-) = (0.562+-0.007+-0.023+0.048-0.092) nb,sigma(pp -> Υ(3S)X × B(Υ(3S) -> mu+ mu-) = (0.283+-0.005+-0.012+0.025-0.048) nb,where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three Υ states.

Measurement of ϒ 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., Cartelle, A. A., A., S., A., Y., A., J., A., R. B., A., O., A., Gutierrez, et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 72:6(2012), pp. 2025-1-2025-12. [10.1140/epjc/s10052-012-2025-y]

Measurement of ϒ production in pp collisions at √s =7 TeV

BIZZETI, Andrea;
2012

Abstract

The production of Y(1S), Y(2S) and Y(3S) mesons in proton-proton collisions at the centre-of-mass energy of sqrt(s) = 7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb-1 collected at the Large Hadron Collider. The Υ mesons are recon-structed in the decay mode Υ -> mu+ mu- and the signal yieldsare extracted from a fit to the mu+ mu- invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the Υ transverse momentum pT and rapidity y, over the range pT < 15 GeV/c and 2.0 < y < 4.5. The cross-sections times branching fractions, integrated over these kinematic ranges, are measured to besigma(pp -> Y(1S)X × B(Y(1S) -> mu+ mu-) = (2.29+.0.01+-0.10+0.19-0.37) nb,sigma(pp -> Y(2S)X × B(Υ(2S) -> mu+ mu-) = (0.562+-0.007+-0.023+0.048-0.092) nb,sigma(pp -> Υ(3S)X × B(Υ(3S) -> mu+ mu-) = (0.283+-0.005+-0.012+0.025-0.048) nb,where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three Υ states.
2012
72
6
2025-1
2025-12
Measurement of ϒ 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., Cartelle, A. A., A., S., A., Y., A., J., A., R. B., A., O., A., Gutierrez, et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 72:6(2012), pp. 2025-1-2025-12. [10.1140/epjc/s10052-012-2025-y]
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/11380/745999
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