Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV

J. Adam; G. Conesa Balbastre; J. Faivre; C. Furget; R. Guernane; J.S. Real; C. Silvestre; A. Vauthier; R. Vernet; I. Belikov; B. Hippolyte; C. Kuhn; A. Maire; L. Molnar; C. Roy; X. Sanchez Castro; V. Barret; N. Bastid; A. Batista Camejo; P. Crochet; P. Dupieux; S. Li; X. Lopez; F. Manso; S. Porteboeuf-Houssais; P. Rosnet; B. Vulpescu; L. Aphecetche; B. Audurier; A. Baldisseri; Guillaume Batigne; H. Borel; J. Castillo Castellanos; J.-L. Charvet; C. Cheshkov; B. Cheynis; L. Ducroux; M. Germain; J.-Y. Grossiord; A. Lardeux; J. Martin Blanco; L. Massacrier; D.A. Moreira De Godoy; A. Morreale; H. Pereira Da Costa; P. Pillot; L. Ronflette; Y. Schutz; A. Shabetai; D. Stocco; B. Teyssier; R. Tieulent; A. Uras; M. Wang; Z. Conesa Del Valle; I. Das; B. Espagnon; C. Hadjidakis; I. Lakomov; C. Suire; J. D. Tapia Takaki; M. Tarhini; L. Valencia Palomo

doi:10.1103/PhysRevC.93.034913

Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV

J. Adam G. Conesa Balbastre ¹ J. Faivre ¹ C. Furget ¹ R. Guernane ¹ J.S. Real ¹ C. Silvestre ¹ A. Vauthier ¹ R. Vernet ² I. Belikov ³ B. Hippolyte ³ C. Kuhn ³ A. Maire ³ L. Molnar ³ C. Roy ³ X. Sanchez Castro ³ V. Barret ⁴ N. Bastid ⁴ A. Batista Camejo ⁴ P. Crochet ⁴ P. Dupieux ⁴ S. Li ⁴ X. Lopez ⁴ F. Manso ⁴ S. Porteboeuf-Houssais ⁴ P. Rosnet ⁴ B. Vulpescu ⁴ L. Aphecetche ⁵ B. Audurier ⁵ A. Baldisseri ⁶ Guillaume Batigne ⁵ H. Borel ⁶ J. Castillo Castellanos ⁶ J.-L. Charvet ⁶ C. Cheshkov ⁷ B. Cheynis ⁷ L. Ducroux ⁷ M. Germain ⁵ J.-Y. Grossiord ⁷ A. Lardeux ⁶ J. Martin Blanco ⁵ L. Massacrier ⁵ D.A. Moreira De Godoy ⁵ A. Morreale ⁵ H. Pereira Da Costa ⁶ P. Pillot ⁵ L. Ronflette ⁵ Y. Schutz ⁵ A. Shabetai ⁵ D. Stocco ⁵ B. Teyssier ⁷ R. Tieulent ⁷ A. Uras ⁷ M. Wang ⁵ Z. Conesa Del Valle ⁸ I. Das ⁸ B. Espagnon ⁸ C. Hadjidakis ⁸ I. Lakomov ⁸ C. Suire ⁸ J. D. Tapia Takaki ⁸ M. Tarhini ⁸ L. Valencia Palomo ⁸

1 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

2 CC-IN2P3 - Centre de Calcul de l'IN2P3

3 IPHC - Institut Pluridisciplinaire Hubert Curien

4 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand

5 SUBATECH - Laboratoire SUBATECH Nantes

6 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

7 IPNL - Institut de Physique Nucléaire de Lyon

8 IPNO - Institut de Physique Nucléaire d'Orsay

Abstract : Transverse momentum ($p_{\rm{T}}$) spectra of pions, kaons, and protons up to $p_{\rm{T}} = 20$ GeV/$c$ have been measured in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV using the ALICE detector for six different centrality classes covering 0-80%. The proton-to-pion and the kaon-to-pion ratios both show a distinct peak at $p_{\rm{T}} \approx 3$ GeV/$c$ in central Pb-Pb collisions that decreases towards more peripheral collisions. For $p_{\rm{T}} > 10$ GeV/$c$, the nuclear modification factor is found to be the same for all three particle species in each centrality interval within systematic uncertainties of 10-20%. This suggests there is no direct interplay between the energy loss in the medium and the particle species composition in the hard core of the quenched jet. For $p_{\rm{T}} < 10$ GeV/$c$, the data provide important constraints for models aimed at describing the transition from soft to hard physics.

Type de document :

Article dans une revue

Physical Review C, American Physical Society, 2016, 93, pp.034913. 〈10.1103/PhysRevC.93.034913〉

Domaine :

Physique [physics] / Physique Nucléaire Expérimentale [nucl-ex]

Physique [physics] / Physique des Hautes Energies - Expérience [hep-ex]

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http://hal.in2p3.fr/in2p3-01172195
Contributeur : Emmanuelle Vernay <>
Soumis le : mardi 7 juillet 2015 - 09:40:05
Dernière modification le : lundi 9 avril 2018 - 12:22:07

Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV

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Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV

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