CRIS Current Research Information System

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.

B. Abelev, J. Adam, D. Adamová, M. M. Aggarwal, G. Aglieri Rinella, M. Agnello, et al. (2014). Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at sqrt(s_NN) = 2.76 TeV. PHYSICS LETTERS. SECTION B, 736, 196-207 [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 sqrt(s_NN) = 2.76 TeV

A. Alici;ARCELLI, SILVIA;BASILE, MAURIZIO;BELLINI, FRANCESCA;CIFARELLI, LUISA;COLOCCI, MANUEL;GUERZONI, BARBARA;SCIOLI, GILDA;
2014

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.
2014
B. Abelev, J. Adam, D. Adamová, M. M. Aggarwal, G. Aglieri Rinella, M. Agnello, et al. (2014). Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at sqrt(s_NN) = 2.76 TeV. PHYSICS LETTERS. SECTION B, 736, 196-207 [10.1016/j.physletb.2014.07.011].
B. Abelev; J. Adam; D. Adamová; M. M. Aggarwal; G. Aglieri Rinella; M. Agnello; A. Agostinelli; N. Agrawal; Z. Ahammed; N. Ahmad; A. Ahmad Masoodi; I....espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/428773
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 230
  • ???jsp.display-item.citation.isi??? 206
social impact