The charged-particle production ratios p̄/p, K -/K +, π -/π +, (p+p̄)/(π + + π -), (K ++K -)/(π ++π -) and (p+p̄)/(K + K -) are measured with the LHCb detector using 0. 3 nb -1 of pp collisions delivered by the LHC at √s = 0.9 TeV and 1. 8 nb -1 at √s = 7 TeV. The measurements are performed as a function of transverse momentum p T and pseudorapidity η. The production ratios are compared to the predictions of several Monte Carlo generator settings, none of which are able to describe adequately all observables. The ratio p̄/p is also considered as a function of rapidity loss, Δy≡y beam-y, and is used to constrain models of baryon transport. © 2012 CERN for the benefit of the LHCb collaboration.
Aaij, R., Abellan Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., et al. (2012). Measurement of prompt hadron production ratios in pp collisions at √s = 0.9 and 7 TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 72(10), 1-19 [10.1140/epjc/s10052-012-2168-x].
Measurement of prompt hadron production ratios in pp collisions at √s = 0.9 and 7 TeV
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2012
Abstract
The charged-particle production ratios p̄/p, K -/K +, π -/π +, (p+p̄)/(π + + π -), (K ++K -)/(π ++π -) and (p+p̄)/(K + K -) are measured with the LHCb detector using 0. 3 nb -1 of pp collisions delivered by the LHC at √s = 0.9 TeV and 1. 8 nb -1 at √s = 7 TeV. The measurements are performed as a function of transverse momentum p T and pseudorapidity η. The production ratios are compared to the predictions of several Monte Carlo generator settings, none of which are able to describe adequately all observables. The ratio p̄/p is also considered as a function of rapidity loss, Δy≡y beam-y, and is used to constrain models of baryon transport. © 2012 CERN for the benefit of the LHCb collaboration.
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