Measurement of pion, kaon and proton production in proton–proton collisions at √s = 7 TeV

Adam, J. and Adamová, D. and Aggarwal, M. M. and Rinella, G. A. and Agnello, M. and Barnaföldi, Gergely Gábor and Bencédi, Gyula and Berényi, Dániel and Boldizsár, László and Dénes, Ervin and Hamar, Gergő and Kiss, Gábor and Varga-Kőfaragó, Mónika and Lévai, Péter and Lowe, Andrew John and Oláh, László and Pochybova, Sona and Varga, Dezső (2015) Measurement of pion, kaon and proton production in proton–proton collisions at √s = 7 TeV. EUROPEAN PHYSICAL JOURNAL C, 75 (5). ISSN 1434-6044

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Abstract

The measurement of primary π ±, K±, p and p production at mid-rapidity (|y| < 0.5) in protonproton collisions at √ s = 7 TeV performed with ALICE (A Large Ion Collider Experiment) at the Large Hadron Collider (LHC) is reported. Particle identification is performed using the specific ionization energy loss and time-of-flight information, the ring-imaging Cherenkov technique and the kink-topology identification of weak decays of charged kaons. Transverse momentum spectra are measured from 0.1 up to 3 GeV/c for pions, from 0.2 up to 6 GeV/c for kaons and from 0.3 up to 6 GeV/c for protons. The measured spectra and particle ratios are compared with QCD-inspired models, tuned to reproduce also the earlier measurements performed at the LHC. Furthermore, the integrated particle yields and ratios as well as the average transverse momenta are compared with results at lower collision energies.

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