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Title: Production of Pions, Kaons, and Protons in pp Collisions at $$\sqrt{s}$$ = 900 GeV with ALICE at the LHC

Journal Article · · European Physical Journal. C, Particles and Fields
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The production of $π^+$, $π^–$, $$\hbox{K}^+$$, $$\hbox{K}^–$$, $$p$$, and $$\overline p$$ at mid-rapidity has been measured in proton-proton collisions at $$\sqrt{s}$$ = 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 ($$p_t$$) spectra. Since these various particle identification tools give the best separation capabilities over different momentum ranges, the results are combined to extract spectra from $$p_t$$=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 $$p_t$$ are compared with previous measurements, and the trends as a function of collision energy are discussed.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF); State of Texas; State of Ohio
Contributing Organization:
The ALICE Collaboration
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1042803
Journal Information:
European Physical Journal. C, Particles and Fields, Vol. 71, Issue 6; ISSN 1434-6044
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 200 works
Citation information provided by
Web of Science

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