Production of pions, kaons and protons in pp collisions at √ s = 900 GeV with ALICE at the LHC

0374463 - FZÚ 2013 RIV DE eng J - Článek v odborném periodiku
Aamodt, K. - Abel, N. - Abeysekara, U. - Quintana, A.A. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Kushpil, Svetlana - Kushpil, Vasilij - Mareš, Jiří A. - Polák, Karel - Šumbera, Michal - Tlustý, D. - Wagner, V. - Závada, Petr … celkem 1062 autorů
Production of pions, kaons and protons in pp collisions at √ s = 900 GeV with ALICE at the LHC.
European Physical Journal C. Roč. 71, č. 6 (2011), 1-22. ISSN 1434-6044. E-ISSN 1434-6052
Grant CEP: GA MŠMT LA08015
Výzkumný záměr: CEZ:AV0Z10100502; CEZ:AV0Z10480505
Klíčová slova: CERN * ALICE * LHC * pp collisions
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 3.631, rok: 2011

The production of π+, π−, K+, K−, p, and p at mid-rapidity has been measured in proton-proton collisions at √ s = 900 GeV with the ALICE detector. Particle identification is performed using the specific energy loss in the inner tracking silicon detector and the time projection chamber. In addition, time-of-flight information is used to identify hadrons at higher momenta. Finally, the distinctive kink topology of the weak decay of charged kaons is used for an alternative measurement of the kaon transverse momentum (pt) spectra. Since these various particle identification tools give the best separation capabilities over different momentum ranges, the results are combined to extract spectra from pt = 100 MeV/c to 2.5 GeV/c. The measured spectra are further compared with QCD-inspired models which yield a poor description. The total yields and the mean pt are compared with previous measurements, and the trends as a function of collision energy are discussed.
Trvalý link: http://hdl.handle.net/11104/0207379