Abstract
Bose-Einstein correlations of same-sign charged pions, produced in proton-proton collisions at a 7 TeV centre-of-mass energy, are studied using a data sample collected by the LHCb experiment. The signature for Bose-Einstein correlations is observed in the form of an enhancement of pairs of like-sign charged pions with small four-momentum difference squared. The charged-particle multiplicity dependence of the Bose-Einstein correlation parameters describing the correlation strength and the size of the emitting source is investigated, determining both the correlation radius and the chaoticity parameter. The measured correlation radius is found to increase as a function of increasing charged-particle multiplicity, while the chaoticity parameter is seen to decrease.
Original language | English |
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Article number | 25 |
Journal | Journal of High Energy Physics |
Volume | 2017 |
Issue number | 12 |
DOIs | |
Publication status | Published - 1 Dec 2017 |
Funding
Open Access, Copyright CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3.
Funders | Funder number |
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Not added | 1681016, 1796908 |
AvH Foundation | |
CNRS/IN2P3 | |
FASO | |
Herchel Smith Fund | |
Labex ENIGMASS | |
Marie Sklo dowska-Curie Actions | |
MinES | |
OCEVU | |
Région Auvergne | |
Yandex LLC | |
National Science Foundation | |
School of Energy Resources, University of Wyoming | |
CERN | |
Science and Technology Facilities Council | ST/J004332/1, ST/N000250/1, 1641747, ST/K003410/1, ST/H006737/1, LHCb, ST/N000331/1, GRIDPP, LHCb Upgrades |
Leverhulme Trust | |
Royal Society | |
Royal Commission for the Exhibition of 1851 | |
European Commission | |
European Research Council | |
Deutsche Forschungsgemeinschaft | |
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung | 166208 |
National Natural Science Foundation of China | |
Russian Foundation for Basic Research | |
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior | |
Bundesministerium für Bildung und Forschung | |
Nederlandse Organisatie voor Wetenschappelijk Onderzoek | |
Generalitat Valenciana | |
Conselho Nacional de Desenvolvimento Científico e Tecnológico | |
Ministry of Science and Technology | |
Instituto Nazionale di Fisica Nucleare | |
Narodowe Centrum Nauki | |
Ministerstwo Nauki i Szkolnictwa Wyższego | |
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro | |
National Academy of Sciences of Ukraine | |
Financiadora de Estudos e Projetos | |
Conseil Général de l'Aisne |
Keywords
- Hadron-Hadron scattering (experiments)
- Particle correlations and fluctuations
- QCD