Two-particle correlations in azimuthal angle and pseudorapidity in central $^7$Be+$^9$Be collisions at the CERN Super Proton Synchrotron
Abstract
A measurement of charged hadron pair correlations in two-dimensional 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, 30, 40, 75, and 150 GeV/. Measurements were carried out for unlike-sign and like-sign charge hadron pairs independently. The 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 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.
Keywords
Cite
@article{arxiv.2006.02153,
title = {Two-particle correlations in azimuthal angle and pseudorapidity in central $^7$Be+$^9$Be collisions at the CERN Super Proton Synchrotron},
author = {SHINE Collaboration and A. Aduszkiewicz and E. V. Andronov and T. Antićić and V. Babkin and M. Baszczyk and S. Bhosale and A. Blondel and M. Bogomilov and A. Brandin and A. Bravar and W. Bryliński and J. Brzychczyk and M. Buryakov and O. Busygina and A. Bzdak and H. Cherif and M. Ćirković and M. Csanad and J. Cybowska and T. Czopowicz and A. Damyanova and N. Davis and M. Deliyergiyev and M. Deveaux and A. Dmitriev and W. Dominik and P. Dorosz and J. Dumarchez and R. Engel and G. A. Feofilov and L. Fields and Z. Fodor and A. Garibov and M. Gaździcki and O. Golosov and V. Golovatyuk and M. Golubeva and K. Grebieszkow and F. Guber and A. Haesler and S. N. Igolkin and S. Ilieva and A. Ivashkin and S. R. Johnson and K. Kadija and N. Kargin and E. Kashirin and M. Kiełbowicz and V. A. Kireyeu and V. Klochkov and V. I. Kolesnikov and D. Kolev and A. Korzenev and V. N. Kovalenko and S. Kowalski and M. Koziel and A. Krasnoperov and W. Kucewicz and M. Kuich and A. Kurepin and D. Larsen and A. László and T. V. Lazareva and M. Lewicki and K. Łojek and V. V. Lyubushkin and M. Maćkowiak-Pawłowska and Z. Majka and B. Maksiak and A. I. Malakhov and A. Marcinek and A. D. Marino and K. Marton and H. -J. Mathes and T. Matulewicz and V. Matveev and G. L. Melkumov and A. O. Merzlaya and B. Messerly and Ł. Mik and S. Morozov and S. Mrówczyński and Y. Nagai and M. Naskręt and V. Ozvenchuk and V. Paolone and O. Petukhov and R. Płaneta and P. Podlaski and B. A. Popov and B. Porfy and M. Posiadała-Zezula and D. S. Prokhorova and D. Pszczel and S. Puławski and J. Puzović and M. Ravonel and R. Renfordt and D. Röhrich and E. Rondio and M. Roth and B. T. Rumberger and M. Rumyantsev and A. Rustamov and M. Rybczynski and A. Rybicki and A. Sadovsky and K. Schmidt and I. Selyuzhenkov and A. Yu. Seryakov and P. Seyboth and M. Słodkowski and P. Staszel and G. Stefanek and J. Stepaniak and M. Strikhanov and H. Ströbele and T. Šuša and A. Taranenko and A. Tefelska and D. Tefelski and V. Tereshchenko and A. Toia and R. Tsenov and L. Turko and R. Ulrich and M. Unger and D. Uzhva and F. F. Valiev and D. Veberič and V. V. Vechernin and A. Wickremasinghe and Z. Włodarczyk and K. Wojcik and O. Wyszyński and E. D. Zimmerman and R. Zwaska},
journal= {arXiv preprint arXiv:2006.02153},
year = {2021}
}
Comments
28 pages, 17 figures, applied corrections after journal review