Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at √sNN =2.76 TeV

B. Abelev; J. Adam; D. Adamová; M.M. Aggarwal; Ian Bearden; Hans Bøggild; Christian Holm Christensen; Kristjan Herlache Gulbrandsen; Jens Jørgen Gaardhøje; Børge Svane Nielsen; Alexander Colliander Hansen; Ante Bilandzic; Marek Chojnacki; Valentina Zaccolo

doi:10.1016/j.physletb.2014.07.011

Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at √^sNN =2.76 TeV

B. Abelev, J. Adam, D. Adamová, M.M. Aggarwal, Ian Bearden, Hans Bøggild, Christian Holm Christensen, Kristjan Herlache Gulbrandsen, Jens Jørgen Gaardhøje, Børge Svane Nielsen, Alexander Colliander Hansen, Ante Bilandzic, Marek Chojnacki, Valentina Zaccolo

Experimental Particle Physics

171 Citations (Scopus)

Abstract

Transverse momentum spectra of ^{π ±}, ^{K ±} and p(p-) up to _pT = 20 GeV/c at mid-rapidity in pp, peripheral (60-80%) and central (0-5%) Pb-Pb collisions at √sNN=2.76 TeV have been measured using the ALICE detector at the Large Hadron Collider. The proton-to-pion and the kaon-to-pion ratios both show a distinct peak at _pT ≈ 3 GeV/c in central Pb-Pb collisions. Below the peak, _pT < 3 GeV/c, both ratios are in good agreement with hydrodynamical calculations, suggesting that the peak itself is dominantly the result of radial flow rather than anomalous hadronization processes. For _pT > 10 GeV/c particle ratios in pp and Pb-Pb collisions are in agreement and the nuclear modification factors for ^{π ±}, ^{K ±} and p(p-) indicate that, within the systematic and statistical uncertainties, the suppression is the same. This suggests that the chemical composition of leading particles from jets in the medium is similar to that of vacuum jets.

Original language	English
Journal	Physics Letters B
Volume	736
Pages (from-to)	196-207
ISSN	0370-2693
DOIs	https://doi.org/10.1016/j.physletb.2014.07.011
Publication status	Published - 7 Sept 2014

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Abelev, B., Adam, J., Adamová, D., Aggarwal, M. M., Bearden, I., Bøggild, H., Christensen, C. H., Gulbrandsen, K. H., Gaardhøje, J. J., Nielsen, B. S., Hansen, A. C., Bilandzic, A., Chojnacki, M., & Zaccolo, V. (2014). Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at √^sNN =2.76 TeV. Physics Letters B, 736, 196-207. https://doi.org/10.1016/j.physletb.2014.07.011

Abelev, B, Adam, J, Adamová, D, Aggarwal, MM, Bearden, I , Bøggild, H , Christensen, CH , Gulbrandsen, KH , Gaardhøje, JJ , Nielsen, BS, Hansen, AC, Bilandzic, A, Chojnacki, M & Zaccolo, V 2014, 'Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at √^sNN =2.76 TeV', Physics Letters B, vol. 736, pp. 196-207. https://doi.org/10.1016/j.physletb.2014.07.011

@article{9e63e34b272e46b0952c5b60ec9d8b15,

title = "Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at √sNN =2.76 TeV",

abstract = "Transverse momentum spectra of π ±, K ± and p(p-) up to pT = 20 GeV/c at mid-rapidity in pp, peripheral (60-80%) and central (0-5%) Pb-Pb collisions at √sNN=2.76 TeV have been measured using the ALICE detector at the Large Hadron Collider. The proton-to-pion and the kaon-to-pion ratios both show a distinct peak at pT ≈ 3 GeV/c in central Pb-Pb collisions. Below the peak, pT < 3 GeV/c, both ratios are in good agreement with hydrodynamical calculations, suggesting that the peak itself is dominantly the result of radial flow rather than anomalous hadronization processes. For pT > 10 GeV/c particle ratios in pp and Pb-Pb collisions are in agreement and the nuclear modification factors for π ±, K ± and p(p-) indicate that, within the systematic and statistical uncertainties, the suppression is the same. This suggests that the chemical composition of leading particles from jets in the medium is similar to that of vacuum jets.",

author = "B. Abelev and J. Adam and D. Adamov{\'a} and M.M. Aggarwal and Ian Bearden and Hans B{\o}ggild and Christensen, {Christian Holm} and Gulbrandsen, {Kristjan Herlache} and Gaardh{\o}je, {Jens J{\o}rgen} and Nielsen, {B{\o}rge Svane} and Hansen, {Alexander Colliander} and Ante Bilandzic and Marek Chojnacki and Valentina Zaccolo",

year = "2014",

month = sep,

day = "7",

doi = "10.1016/j.physletb.2014.07.011",

language = "English",

volume = "736",

pages = "196--207",

journal = "Physics Letters B: Particle Physics, Nuclear Physics and Cosmology",

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TY - JOUR

T1 - Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at √sNN =2.76 TeV

AU - Abelev, B.

AU - Adam, J.

AU - Adamová, D.

AU - Aggarwal, M.M.

AU - Bearden, Ian

AU - Bøggild, Hans

AU - Christensen, Christian Holm

AU - Gulbrandsen, Kristjan Herlache

AU - Gaardhøje, Jens Jørgen

AU - Nielsen, Børge Svane

AU - Hansen, Alexander Colliander

AU - Bilandzic, Ante

AU - Chojnacki, Marek

AU - Zaccolo, Valentina

PY - 2014/9/7

Y1 - 2014/9/7

N2 - Transverse momentum spectra of π ±, K ± and p(p-) up to pT = 20 GeV/c at mid-rapidity in pp, peripheral (60-80%) and central (0-5%) Pb-Pb collisions at √sNN=2.76 TeV have been measured using the ALICE detector at the Large Hadron Collider. The proton-to-pion and the kaon-to-pion ratios both show a distinct peak at pT ≈ 3 GeV/c in central Pb-Pb collisions. Below the peak, pT < 3 GeV/c, both ratios are in good agreement with hydrodynamical calculations, suggesting that the peak itself is dominantly the result of radial flow rather than anomalous hadronization processes. For pT > 10 GeV/c particle ratios in pp and Pb-Pb collisions are in agreement and the nuclear modification factors for π ±, K ± and p(p-) indicate that, within the systematic and statistical uncertainties, the suppression is the same. This suggests that the chemical composition of leading particles from jets in the medium is similar to that of vacuum jets.

AB - Transverse momentum spectra of π ±, K ± and p(p-) up to pT = 20 GeV/c at mid-rapidity in pp, peripheral (60-80%) and central (0-5%) Pb-Pb collisions at √sNN=2.76 TeV have been measured using the ALICE detector at the Large Hadron Collider. The proton-to-pion and the kaon-to-pion ratios both show a distinct peak at pT ≈ 3 GeV/c in central Pb-Pb collisions. Below the peak, pT < 3 GeV/c, both ratios are in good agreement with hydrodynamical calculations, suggesting that the peak itself is dominantly the result of radial flow rather than anomalous hadronization processes. For pT > 10 GeV/c particle ratios in pp and Pb-Pb collisions are in agreement and the nuclear modification factors for π ±, K ± and p(p-) indicate that, within the systematic and statistical uncertainties, the suppression is the same. This suggests that the chemical composition of leading particles from jets in the medium is similar to that of vacuum jets.

U2 - 10.1016/j.physletb.2014.07.011

DO - 10.1016/j.physletb.2014.07.011

M3 - Journal article

SN - 0370-2693

VL - 736

SP - 196

EP - 207

JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

ER -

Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at √sNN =2.76 TeV

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Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at √^sNN =2.76 TeV