Measurement of prompt hadron production ratios in pp collisions at root s=0.9 and 7 TeV

R Aaij, J.F.J. van den Brand, F. Dettori, T.J. Ketel, R. Koopman, P. Koppenburg, R.W. Lambert, H.G. Raven, M. Schiller, S. Tolk

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The charged−particle production ratios p/p, K /K +, π +, (p + p)/(π +), (K ++K )/(π + + π ) and (p+ p)/(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<inf>T</inf> 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 p/p is also considered as a function of rapidity loss, Δy ≡ y<inf>beam</inf> − y, and is used to constrain models of baryon transport.
Original languageEnglish
Article number2168
JournalEuropean Physical Journal C. Particles and Fields
Volume72
Issue number10
DOIs
Publication statusPublished - 2012

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