Journal
PHYSICS LETTERS B
Volume 736, Issue -, Pages 196-207Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2014.07.011
Keywords
Identified particle production; High p(T); Particle ratios; Baryon anomaly; Nuclear modification factor; ALICE; LHC
Funding
- Worldwide LHC Computing Grid (WLCG) Collaboration
- State Committee of Science, Armenia
- World Federation of Scientists (WFS), Armenia
- Swiss Fonds Kidagan, Armenia
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Financiadora de Estudos e Projetos (FINEP)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- National Natural Science Foundation of China (NSFC)
- Chinese Ministry of Education (CMOE)
- Ministry of Science and Technology of China (MSTC)
- Ministry of Education and Youth of the Czech Republic
- Danish Natural Science Research Council
- Carlsberg Foundation
- Danish National Research Foundation
- European Research Council under the European Community's Seventh Framework Programme
- Helsinki Institute of Physics
- Academy of Finland
- French CNRS-IN2P3, France
- 'Region Pays de Loire', France
- 'Region Alsace', France
- 'Region Auvergne', France
- CEA, France
- German BMBF
- Helmholtz Association
- General Secretariat for Research and Technology, Ministry of Development, Greece
- Hungarian OTKA
- National Office for Research and Technology (NKTH)
- Department of Atomic Energy and Department of Science and Technology of the Government of India
- Istituto Nazionale di Fisica Nucleare (INFN) and Centro Fermi Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Italy
- MEXT, Japan
- Joint Institute for Nuclear Research, Dubna
- National Research Foundation of Korea (NRF)
- CONACYT, Mexico
- DGAPA, Mexico
- ALFA-EC
- EPLANET Program (European Particle Physics Latin American Network)
- Stichting voor Fundamenteel Onderzoek der Materie (FOM)
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands
- Research Council of Norway (NFR)
- Polish Ministry of Science and Higher Education
- National Science Centre, Poland
- Ministry of National Education/Institute for Atomic Physics and CNCS-UEFISCDI - Romania
- Ministry of Education and Science of Russian Federation
- Russian Academy of Sciences
- Russian Federal Agency of Atomic Energy
- Russian Federal Agency for Science and Innovations
- Russian Foundation for Basic Research
- Ministry of Education of Slovakia
- Department of Science and Technology, South Africa
- CIEMAT
- EELA
- Ministerio de Economia y Competitividad (MINECO) of Spain
- Xunta de Galicia (Conselleria de Educacion)
- Xunta de Galicia (Conselleria de Educacion), CEADEN
- Cubaenergia, Cuba
- IAEA (International Atomic Energy Agency)
- Swedish Research Council (VR)
- Knut & Alice Wallenberg Foundation (KAW)
- Ukraine Ministry of Education and Science
- United Kingdom Science and Technology Facilities Council (STFC)
- United States Department of Energy
- United States National Science Foundation
- State of Texas
- State of Ohio
- STFC [ST/G008833/1, ST/J000094/1, ST/I003398/1, ST/J000108/1, 2014 STFC Nuclear Physics CG, ST/J000140/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J000108/1, ST/G008833/1, ST/I003398/1, 2014 STFC Nuclear Physics CG, ST/J000094/1, 1231104, GRIDPP, ST/J000140/1] Funding Source: researchfish
- Grants-in-Aid for Scientific Research [25105504, 26610071, 26220707, 25287048, 23340074] Funding Source: KAKEN
- Division Of Physics
- Direct For Mathematical & Physical Scien [1307461] Funding Source: National Science Foundation
Ask authors/readers for more resources
Transverse momentum spectra of pi(+/-), K-+/- and p((p) over bar) up to p(T) = 20 GeV/c at mid-rapidity in pp, peripheral (60-80%) and central (0-5%) Pb-Pb collisions at v root s(NN) = 2.76 TeV have been measured using the ALICE detector at the Large Hadron Collider. The proton-to-pion and the kaon-to-pionratios both show a distinct peak at p(T) approximate to 3 GeV/c in central Pb-Pb collisions. Below the peak, p(T) < 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 p(T) > 10 GeV/c particle ratios in pp and Pb-Pb collisions are in agreement and the nuclear modification factors for pi(+/-), K-+/- and p((p) over bar) 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. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license
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