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

K. Aamodt...[et al.]; Ian Bearden; Hans Bøggild; Christian Holm Christensen; Hans Hjersing Dalsgaard; Kristjan Herlache Gulbrandsen; Jens Jørgen Gaardhøje; Børge Svane Nielsen; Carsten Søgaard

doi:10.1140/epjc/s10052-011-1655-9

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

K. Aamodt...[et al.], Ian Bearden, Hans Bøggild, Christian Holm Christensen, Hans Hjersing Dalsgaard, Kristjan Herlache Gulbrandsen, Jens Jørgen Gaardhøje, Børge Svane Nielsen, Carsten Søgaard

201 Citations (Scopus)

Abstract

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.

Original language	English
Journal	European Physical Journal C
Volume	71
Issue number	6
Pages (from-to)	1655-
ISSN	1434-6044
DOIs	https://doi.org/10.1140/epjc/s10052-011-1655-9
Publication status	Published - 1 Jun 2011

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@article{08979477abe0417daa98cffc43e09e01,

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

abstract = "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.",

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doi = "10.1140/epjc/s10052-011-1655-9",

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AU - Aamodt...[et al.], K.

AU - Bearden, Ian

AU - Bøggild, Hans

AU - Christensen, Christian Holm

AU - Dalsgaard, Hans Hjersing

AU - Gulbrandsen, Kristjan Herlache

AU - Gaardhøje, Jens Jørgen

AU - Nielsen, Børge Svane

AU - Søgaard, Carsten

PY - 2011/6/1

Y1 - 2011/6/1

N2 - 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.

AB - 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.

U2 - 10.1140/epjc/s10052-011-1655-9

DO - 10.1140/epjc/s10052-011-1655-9

M3 - Journal article

SN - 1434-6044

VL - 71

SP - 1655-

JO - The European Physical Journal C: Particles and Fields

JF - The European Physical Journal C: Particles and Fields

IS - 6

ER -

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

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