Measurement of charged particle multiplicity distributions in DIS at HERA and its implication to entanglement entropy of partons

H1 Collaboration , V Andreev , A Baghdasaryan , A Baty , K Begzsuren , A Belousov , A Bolz , V. Boudry (1) , G Brandt , D Britzger , A Buniatyan , L Bystritskaya , A J Campbell , K B Cantun Avila , K Cerny , V Chekelian , Z Chen , J G Contreras , J Cvach , J B Dainton , K Daum , A Deshpande , C Diaconu (2) , G Eckerlin , S Egli , E Elsen , L Favart , A Fedotov , J Feltesse , M Fleischer , A Fomenko , C Gal , J Gayler , L Goerlich , N Gogitidze , M Gouzevitch , C Grab , A Grebenyuk , T Greenshaw , G Grindhammer , D Haidt , R C W Henderson , J Hladkỳ , D Hoffmann (2) , R Horisberger , T Hreus , F Huber , M Jacquet (3) , X Janssen , A W Jung , H Jung , M Kapichine , J Katzy , C Kiesling , Matthieu Klein , C Kleinwort , R Kogler , P Kostka , J Kretzschmar , D Krücker , K Krüger , M P J Landon , W Lange , P Laycock , A Lebedev , S Levonian , K Lipka , B List , J List , W Li , B Lobodzinski , E Malinovski , H.-U Martyn , S J Maxfield , A Mehta , A B Meyer , H Meyer , J Meyer , S Mikocki , M M Mondal , A Morozov , K Müller , Th Naumann , P R Newman , C Niebuhr , G Nowak , J E Olsson , D Ozerov , S Park , C Pascaud (3) , G D Patel , E Perez , A Petrukhin (4) , I Picuric , D Pitzl , R Polifka , V Radescu , N Raicevic , T Ravdandorj , P Reimer , E Rizvi , P Robmann , R Roosen , A Rostovtsev , M Rotaru , D P C Sankey , M Sauter , E Sauvan (2, 5) , S Schmitt , B A Schmookler , L Schoeffel , A Schöning , F Sefkow , S Shushkevich , Y Soloviev , P Sopicki , D South , V Spaskov , Arnd Specka (1) , M Steder , B Stella , U Straumann , T Sykora , P D Thompson , D Traynor , P Truöl , B Tseepeldorj , Z Tu , T Ullrich , A Valkárová , C Vallée (2) , P van Mechelen , D Wegener , E Wünsch , J Žáček , J Zhang , Z Zhang (3) , R Žlebčík , H Zohrabyan , F Zomer (3)

1 LLR - Laboratoire Leprince-Ringuet
2 CPPM - Centre de Physique des Particules de Marseille
3 LAL - Laboratoire de l'Accélérateur Linéaire
4 IPNL - Institut de Physique Nucléaire de Lyon
5 LAPP - Laboratoire d'Annecy de Physique des Particules

Charged particle multiplicity distributions in positron-proton deep inelastic scattering at a centre-of-mass energy √ s = 319 GeV are measured. The data are collected with the H1 detector at HERA corresponding to an integrated luminosity of 136 pb −1. Charged particle multiplicities are measured as a function of photon virtuality Q 2 , inelasticity y and pseudorapidity η in the laboratory and the hadronic centre-of-mass frames. Predictions from different Monte Carlo models are compared to the data. The first and second moments of the multiplicity distributions are determined and the KNO scaling behaviour is investigated. The multiplicity distributions as a function of Q 2 and the Bjorken variable x bj are converted to the hadron entropy S hadron , and predictions from a quantum entanglement model are tested.

Domaines: Physique des Hautes Energies - Expérience [hep-ex]; Physique des Hautes Energies - Phénoménologie [hep-ph]; Physique [physics]

H1 Collaboration, V Andreev, A Baghdasaryan, A Baty, K Begzsuren, et al.. Measurement of charged particle multiplicity distributions in DIS at HERA and its implication to entanglement entropy of partons. European Physical Journal C: Particles and Fields, 2021, 81, pp.212. ⟨10.1140/epjc/s10052-021-08896-1⟩. ⟨hal-03054562⟩