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- Title
Measurement of prompt hadron production ratios in pp collisions at $\sqrt{s} = 0.9\mbox{ and }7~\mathrm{TeV}$.
- Authors
Aaij, R.; Abellan Beteta, C.; Adametz, A.; Adeva, B.; Adinolfi, M.; Adrover, C.; Affolder, A.; Ajaltouni, Z.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alves, A.; Amato, S.; Amhis, Y.; Anderson, J.
- Abstract
The charged-particle production ratios $\bar{p}/p$, K/ K, π/ π, $(p + \bar{p})/(\pi^{+} + \pi^{-})$, ( K+ K)/( π+ π) and $(p + \bar{p})/(K^{+} + K^{-})$ are measured with the LHCb detector using 0.3 nb of pp collisions delivered by the LHC at $\sqrt{s} = 0.9~\mathrm{TeV}$ and 1.8 nb at $\sqrt{s} = 7~\mathrm{TeV}$. The measurements are performed as a function of transverse momentum p 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 $\bar{p}/p$ is also considered as a function of rapidity loss, Δ y≡ y− y, and is used to constrain models of baryon transport.
- Subjects
MULTIPLICITY of hadrons; COLLISIONS (Physics); MONTE Carlo method; PREDICTION theory; BARYONS; MOMENTUM (Mechanics)
- Publication
European Physical Journal C -- Particles & Fields, 2012, Vol 72, Issue 10, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-012-2168-x