Two-particle correlations in azimuthal angle and pseudorapidity in central $^7$Be+$^9$Be collisions at the CERN Super Proton Synchrotron
Creators: name: SHINE Collaboration
name: Aduszkiewicz, A.
name: Andronov, E. V.
name: Antićić, T.
name: Babkin, V.
name: Baszczyk, M.
name: Bhosale, S.
name: Blondel, A.
name: Bogomilov, M.
name: Brandin, A.
name: Bravar, A.
name: Bryliński, W.
name: Brzychczyk, J.
name: Buryakov, M.
name: Busygina, O.
name: Bzdak, A.
name: Cherif, H.
name: Ćirković, M.
name: Csanad, M.
name: Cybowska, J.
name: Czopowicz, T.
name: Damyanova, A.
name: Davis, N.
name: Deliyergiyev, M.
name: Deveaux, M.
name: Dmitriev, A.
name: Dominik, W.
name: Dorosz, P.
name: Dumarchez, J.
name: Engel, R.
name: Feofilov, G. A.
name: Fields, L.
name: Fodor, Z.
name: Garibov, A.
name: Gaździcki, M.
name: Golosov, O.
name: Golovatyuk, V.
name: Golubeva, M.
name: Grebieszkow, K.
name: Guber, F.
name: Haesler, A.
name: Igolkin, S. N.
name: Ilieva, S.
name: Ivashkin, A.
name: Johnson, S. R.
name: Kadija, K.
name: Kargin, N.
name: Kashirin, E.
name: Kiełbowicz, M.
name: Kireyeu, V. A.
name: Klochkov, V.
name: Kolesnikov, V. I.
name: Kolev, D.
name: Korzenev, A.
name: Kovalenko, V. N.
name: Kowalski, S.
name: Koziel, M.
name: Krasnoperov, A.
name: Kucewicz, W.
name: Kuich, M.
name: Kurepin, A.
name: Larsen, D.
name: László, A.
name: Lazareva, T. V.
name: Lewicki, M.
name: Łojek, K.
name: Lyubushkin, V. V.
name: Maćkowiak-Pawłowska, M.
name: Majka, Z.
name: Maksiak, B.
name: Malakhov, A. I.
name: Marcinek, A.
name: Marino, A. D.
name: Marton, K.
name: Mathes, H. -J.
name: Matulewicz, T.
name: Matveev, V.
name: Melkumov, G. L.
name: Merzlaya, A. O.
name: Messerly, B.
name: Mik, Ł.
name: Morozov, S.
name: Mrówczyński, S.
name: Nagai, Y.
name: Naskręt, M.
name: Ozvenchuk, V.
name: Paolone, V.
name: Petukhov, O.
name: Płaneta, R.
name: Podlaski, P.
name: Popov, B. A.
name: Porfy, B.
name: Posiadała-Zezula, M.
name: Prokhorova, D. S.
name: Pszczel, D.
name: Puławski, S.
name: Puzović, J.
name: Ravonel, M.
name: Renfordt, R.
name: Röhrich, D.
name: Rondio, E.
name: Roth, M.
name: Rumberger, B. T.
name: Rumyantsev, M.
name: Rustamov, A.
name: Rybczynski, M.
name: Rybicki, A.
name: Sadovsky, A.
name: Schmidt, K.
name: Selyuzhenkov, I.
name: Seryakov, A. Yu.
name: Seyboth, P.
name: Słodkowski, M.
name: Staszel, P.
name: Stefanek, G.
name: Stepaniak, J.
name: Strikhanov, M.
name: Ströbele, H.
name: Šuša, T.
name: Taranenko, A.
name: Tefelska, A.
name: Tefelski, D.
name: Tereshchenko, V.
name: Toia, A.
name: Tsenov, R.
name: Turko, L.
name: Ulrich, R.
name: Unger, M.
name: Uzhva, D.
name: Valiev, F. F.
name: Veberič, D.
name: Vechernin, V. V.
name: Wickremasinghe, A.
name: Włodarczyk, Z.
name: Wojcik, K.
name: Wyszyński, O.
name: Zimmerman, E. D.
name: Zwaska, R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: A measurement of charged hadron pair correlations in two-dimensional $ΔηΔϕ$ 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 $C(Δη,Δϕ)$ 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 $(Δη,Δϕ) = (0,0)$ 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.
description: 28 pages, 17 figures, applied corrections after journal review