Study of the Bose-Einstein correlations of same-sign pions in proton-lead collisions

Lhcb Collaboration ,O Kot,N S Nolte ,R Nandakumar ,N Harnew ,G Khreich ,A Ukleja ,P Robbe ,E N Stein ,S Gromov ,F J P Soler ,G Raven ,V Vagnoni ,G Sarpis ,Ning Qin ,B Meadows ,D Nicotra ,P Billoir ,S Taneja ,J Haimberger ,L Dai ,A Venkateswaran ,C Bozzi ,G Casse ,J Horswill ,P Garcia Moreno ,F Polci ,C Vázquez Sierra ,L Soares Lavra ,A G Downes ,M H Schune ,W Baldini ,V Vorobyev ,C S Bolognani ,H Cai ,J Herd ,M S Rangel ,C Parkes ,R Murta ,Philipp Roloff ,C Hasse ,L Capriotti ,A S Boldyrev ,V Puill ,J E Davies ,R Santacesaria ,D L Rolf ,R Matev ,P Ciambrone ,L Mcconnell ,N Voropaev ,A Sciuccati ,M Chrząszcz ,A Inglessi ,Z Zhu ,X Zhu ,Q Han ,B K Jashal ,R D L Henderson ,L Dufour ,A T Grecu ,A M Donohoe ,M S Bieker ,F Muheim ,A Dziurda ,R Manera Escalero ,E Maurice ,R J Barlow ,Jianqiao Wang ,L Sestini ,J Eschle ,A Minotti ,Hangyi Wu ,X Han ,V Shevchenko ,O Kitouni ,X Wang ,S Meloni ,F Dettori ,D Y Tou ,E Luppi ,S Legotin ,C Santamarina Ríos ,E Rodríguez ,D Zhang ,W Barter ,Z Aliouche 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Norella ,M Kreps ,G Lafferty ,T Boettcher ,G Benane ,C Hadjivasiliou ,C A Chavez Barajas ,R Song ,Marko Milovanovic ,M A Giza ,L Grillo ,C Lucarelli ,D Bobulska ,P E L Clarke ,Ia Bezshyiko ,V Pugatch ,K Świentek ,Y Fan ,R Jacobsson ,L Tomassetti ,A Jawahery ,A Biolchini ,A Iniukhin ,J S Yu ,S Simone ,F Ferrari ,N Serra ,J Hammerich ,E Ejopu ,A Mauri ,N Cooke ,Y Shimizu ,M Stahl ,K Klimaszewski ,D Zuliani ,M Giovannetti ,A Satta ,P Pais ,M M Duras ,C Mancuso ,A Beiter ,G Zunica

doi:10.1007/jhep09(2023)172

Abstract

Correlations of same-sign charged pions are analysed using proton-lead collision data collected by the LHCb experiment at a nucleon-nucleon centre-of-mass energy of 5.02 TeV, corresponding to an integrated luminosity of 1.06 nb−1. Bose-Einstein correlations are observed in the form of an enhancement of pair production for same-sign charged pions with a small four-momentum difference. The dependence of the correlation radius and the intercept parameter on the reconstructed charged-particle multiplicity is investigated. The measured correlation radii scale linearly with the cube root of the reconstructed charged-particle multiplicity, being compatible with predictions of hydrodynamic models on the collision system evolution.

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