Abstract
We report on the measurement of the inclusive ϒ{hooked}(1S) production in Pb-Pb collisions at sNN=2.76 TeV carried out at forward rapidity (2.5<y<4) and down to zero transverse momentum using its μ+μ- decay channel with the ALICE detector at the Large Hadron Collider. A strong suppression of the inclusive ϒ{hooked}(1S) yield is observed with respect to pp collisions scaled by the number of independent nucleon-nucleon collisions. The nuclear modification factor, for events in the 0-90% centrality range, amounts to 0.30±0.05(stat)±0.04(syst). The observed ϒ{hooked}(1S) suppression tends to increase with the centrality of the collision and seems more pronounced than in corresponding mid-rapidity measurements. Our results are compared with model calculations, which are found to underestimate the measured suppression and fail to reproduce its rapidity dependence.
Original language | English |
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Pages (from-to) | 361-372 |
Number of pages | 12 |
Journal | Physics Letters B |
Volume | 738 |
DOIs | |
State | Published - Nov 1 2014 |
Externally published | Yes |
Funding
The ALICE Collaboration acknowledges the following funding agencies for their support in building and running the ALICE detector: State Committee of Science , World Federation of Scientists (WFS) and Swiss Fonds Kidagan , Armenia, Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Financiadora de Estudos e Projetos (FINEP), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); National Natural Science Foundation of China (NSFC), the Chinese Ministry of Education (CMOE) and the Ministry of Science and Technology of China (MSTC); Ministry of Education and Youth of the Czech Republic; Danish Natural Science Research Council , the Carlsberg Foundation and the Danish National Research Foundation ; The European Research Council under the European Community's Seventh Framework Programme ; Helsinki Institute of Physics and the Academy of Finland ; French CNRS-IN2P3 , the ‘ Region Pays de Loire ’, ‘ Region Alsace ’, ‘ Region Auvergne ’ and CEA , France; German BMBF and the Helmholtz Association ; General Secretariat for Research and Technology , Ministry of Development , Greece; Hungarian OTKA and 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 Grant-in-Aid for Specially Promoted Research, Japan; Joint Institute for Nuclear Research , Dubna; National Research Foundation of Korea (NRF); CONACYT , DGAPA , México , ALFA-EC and the EPLANET Program (European Particle Physics Latin American Network); Stichting voor Fundamenteel Onderzoek der Materie (FOM) and the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; Research Council of Norway (NFR); Polish Ministry of Science and Higher Education ; National Authority for Scientific Research – NASR (Autoritatea Naţională pentru Cercetare Ştiinţifică – ANCS); Ministry of Education and Science of the Russian Federation , Russian Academy of Sciences , Russian Federal Agency of Atomic Energy , Russian Federal Agency for Science and Innovations and the Russian Foundation for Basic Research ; Ministry of Education of Slovakia ; Department of Science and Technology, Republic of South Africa ; CIEMAT , EELA , Ministerio de Economía y Competitividad (MINECO) of Spain, Xunta de Galicia (Consellería de Educación), CEADEN , Cubaenergía , Cuba, and IAEA (International Atomic Energy Agency); Swedish Research Council (VR) and Knut and Alice Wallenberg Foundation (KAW); Ukraine Ministry of Education and Science ; United Kingdom Science and Technology Facilities Council (STFC); The U.S. Department of Energy , the United States National Science Foundation , the State of Texas , and the State of Ohio .
Funders | Funder number |
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ALFA-EC | |
DGAPA , México | |
Danish Natural Science Research Council | |
Department of Atomic Energy and Department of Science and Technology of the Government of India | |
General Secretariat for Research and Technology , Ministry of Development | |
Helsinki Institute of Physics | |
Ministry of Education and Youth of the Czech Republic | |
Ministry of Education of Slovakia | |
NFR | |
Region Auvergne ’ and CEA | |
Russian Federal Agency of Atomic Energy , Russian Federal Agency for Science and Innovations | |
State Committee of Science , World Federation | |
State of Ohio | |
Swiss Fonds Kidagan | |
United Kingdom Science and Technology Facilities Council | |
Xunta de Galicia (Consellería de Educación | |
National Science Foundation | |
U.S. Department of Energy | |
Science and Technology Facilities Council | 2014 STFC Nuclear Physics CG, ST/G008833/1, ST/J000140/1, ST/I003398/1, GRIDPP, ST/J000094/1, ST/J000108/1 |
European Research Council | |
Department of Science and Technology, Ministry of Science and Technology, India | |
Japan Society for the Promotion of Science | 25287048, 26610071, 23340074 |
Ministry of Education, Culture, Sports, Science and Technology | |
Stichting voor Fundamenteel Onderzoek der Materie | |
Danmarks Grundforskningsfond | |
Fundação de Amparo à Pesquisa do Estado de São Paulo | |
National Natural Science Foundation of China | |
Russian Foundation for Basic Research | |
Ministry of Education of the People's Republic of China | |
Academy of Finland | CNRS-IN2P3 |
Bundesministerium für Bildung und Forschung | |
Russian Academy of Sciences | |
Carlsbergfondet | |
Ministry of Science and Technology of the People's Republic of China | |
Consejo Nacional de Ciencia y Tecnología | |
Nederlandse Organisatie voor Wetenschappelijk Onderzoek | |
Ministerio de Economía y Competitividad | |
Ministry of Education and Science of the Russian Federation | |
Hungarian Scientific Research Fund | |
Conselho Nacional de Desenvolvimento Científico e Tecnológico | |
National Research Foundation of Korea | |
Joint Institute for Nuclear Research | |
Nemzeti Kutatási és Technológiai Hivatal | |
Instituto Nazionale di Fisica Nucleare | |
Knut och Alice Wallenbergs Stiftelse | |
Vetenskapsrådet | |
International Atomic Energy Agency | |
Ministerstwo Edukacji i Nauki | |
Financiadora de Estudos e Projetos | |
Seventh Framework Programme | |
Norges Forskningsråd | |
Autoritatea Natională pentru Cercetare Stiintifică | |
Ministry of Education and Science of Ukraine | |
Helmholtz Association | |
Conseil Régional des Pays de la Loire | |
Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi | |
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear | |
National Agency for Strategic Research in Medical Education |