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29 March 2024
 
  » arxiv » 2006.2153

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Two-particle correlations in azimuthal angle and pseudorapidity in central 7Be+9Be collisions at the CERN Super Proton Synchrotron
NA61/SHINE Collaboration ; A. Aduszkiewicz ; E.V. Andronov ; T. Antićić ; V. Babkin ; M. Baszczyk ; S. Bhosale ; A. Blondel ; M. Bogomilov ; A. Brandin ; A. Bravar ; W. Bryliński ; J. Brzychczyk ; M. Buryakov ; O. Busygina ; A. Bzdak ; H. Cherif ; M. Ćirković ; M. Csanad ; J. Cybowska ; T. Czopowicz ; A. Damyanova ; N. Davis ; M. Deliyergiyev ; M. Deveaux ; A. Dmitriev ; W. Dominik ; P. Dorosz ; J. Dumarchez ; R. Engel ; G.A. Feofilov ; L. Fields ; Z. Fodor ; A. Garibov ; M. Gaździcki ; O. Golosov ; V. Golovatyuk ; M. Golubeva ; K. Grebieszkow ; F. Guber ; A. Haesler ; S.N. Igolkin ; S. Ilieva ; A. Ivashkin ; S.R. Johnson ; K. Kadija ; N. Kargin ; E. Kashirin ; M. Kiełbowicz ; V.A. Kireyeu ; V. Klochkov ; V.I. Kolesnikov ; D. Kolev ; A. Korzenev ; V.N. Kovalenko ; S. Kowalski ; M. Koziel ; A. Krasnoperov ; W. Kucewicz ; M. Kuich ; A. Kurepin ; D. Larsen ; A. László ; T.V. Lazareva ; M. Lewicki ; K. Łojek ; V.V. Lyubushkin ; M. Maćkowiak-Pawłowska ; Z. Majka ; B. Maksiak ; A.I. Malakhov ; A. Marcinek ; A.D. Marino ; K. Marton ; H.-J. Mathes ; T. Matulewicz ; V. Matveev ; G.L. Melkumov ; A.O. Merzlaya ; B. Messerly ; Ł. Mik ; S. Morozov ; S. Mrówczyński ; Y. Nagai ; M. Naskręt ; V. Ozvenchuk ; V. Paolone ; O. Petukhov ; R. Płaneta ; P. Podlaski ; B.A. Popov ; B. Porfy ; M. Posiadała-Zezula ; D.S. Prokhorova ; D. Pszczel ; S. Puławski ; J. Puzović ; M. Ravonel ; R. Renfordt ; D. Röhrich ; E. Rondio ; M. Roth ; B.T. Rumberger ; M. Rumyantsev ; A. Rustamov ; M. Rybczynski ; A. Rybicki ; A. Sadovsky ; K. Schmidt ; I. Selyuzhenkov ; A.Yu. Seryakov ; P. Seyboth ; M. Słodkowski ; P. Staszel ; G. Stefanek ; J. Stepaniak ; M. Strikhanov ; H. Ströbele ; T. Šuša ; A. Taranenko ; A. Tefelska ; D. Tefelski ; V. Tereshchenko ; A. Toia ; R. Tsenov ; L. Turko ; R. Ulrich ; M. Unger ; D. Uzhva ; F.F. Valiev ; D. Veberič ; V.V. Vechernin ; A. Wickremasinghe ; Z. Włodarczyk ; K. Wojcik ; O. Wyszyński ; E.D. Zimmerman ; R. Zwaska ;
Date 3 Jun 2020
AbstractA measurement of charged hadron pair correlations in two-dimensional $DeltaetaDeltaphi$ space is presented. The analysis is based on total 30 million central Be+Be collisions observed in the NA61/SHINE detector at the CERN SPS for incident beam momenta of 19$A$, 30$A$, 40$A$, 75$A$, and 150$A$ GeV/$c$. Measurements were carried out for unlike-sign and like-sign charge hadron pairs independently. The $C(Deltaeta,Deltaphi)$ correlation functions were compared with results from a similar analysis on p+p interactions at similar beam momenta per nucleon. General trends of the back-to-back correlations are similar in central Be+Be collisions and p+p interactions, but are suppressed in magnitude due to the increased combinatorial background. Predictions from the EPOS and UrQMD models are compared to the measurements. Evolution of an enhancement around $(Deltaeta,Deltaphi) = (0,0)$ with incident energy is observed in central Be+Be collisions. It is not predicted by both models and almost non-existing in proton-proton collisions at the same momentum per nucleon.
Source arXiv, 2006.2153
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