Two-particle correlations in azimuthal angle and pseudorapidity in central $$^7\hbox {Be}+{}^9\hbox {Be}$$ collisions at the CERN Super Proton Synchrotron
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Published:2020-12
Issue:12
Volume:80
Page:
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ISSN:1434-6044
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Container-title:The European Physical Journal C
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language:en
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Short-container-title:Eur. Phys. J. C
Author:
Aduszkiewicz A., , Andronov E. V., Antićić T., Babkin V., Baszczyk M., Bhosale S., Blondel A., Bogomilov M., Brandin A., Bravar A., Bryliński W., Brzychczyk J., Buryakov M., Busygina O., Bzdak A., Cherif H., Ćirković M., Csanad M., Cybowska J., Czopowicz T., Damyanova A., Davis N., Deliyergiyev M., Deveaux M., Dmitriev A., Dominik W., Dorosz P., Dumarchez J., Engel R., Feofilov G. A., Fields L., Fodor Z., Garibov A., Gaździcki M., Golosov O., Golovatyuk V., Golubeva M., Grebieszkow K., Guber F., Haesler A., Igolkin S. N., Ilieva S., Ivashkin A., Johnson S. R., Kadija K., Kargin N., Kashirin E., Kiełbowicz M., Kireyeu V. A., Klochkov V., Kolesnikov V. I., Kolev D., Korzenev A., Kovalenko V. N., Kowalski S., Koziel M., Krasnoperov A., Kucewicz W., Kuich M., Kurepin A., Larsen D., László A., Lazareva T. V., Lewicki M., Łojek K., Lyubushkin V. V., Maćkowiak-Pawłowska M., Majka Z., Maksiak B.ORCID, Malakhov A. I., Marcinek A., Marino A. D., Marton K., Mathes H.-J., Matulewicz T., Matveev V., Melkumov G. L., Merzlaya A. O., Messerly B., Mik Ł., Morozov S., Mrówczyński S., Nagai Y., Naskręt M., Ozvenchuk V., Paolone V., Petukhov O., Płaneta R., Podlaski P., Popov B. A., Porfy B., Posiadała-Zezula M., Prokhorova D. S., Pszczel D., Puławski S., Puzović J., Ravonel M., Renfordt R., Röhrich D., Rondio E., Roth M., Rumberger B. T., Rumyantsev M., Rustamov A., Rybczynski M., Rybicki A., Sadovsky A., Schmidt K., Selyuzhenkov I., Seryakov A. Yu., Seyboth P., Słodkowski M., Staszel P., Stefanek G., Stepaniak J., Strikhanov M., Ströbele H., Šuša T., Taranenko A., Tefelska A., Tefelski D., Tereshchenko V., Toia A., Tsenov R., Turko L., Ulrich R., Unger M., Uzhva D., Valiev F. F., Veberič D., Vechernin V. V., Wickremasinghe A., Włodarczyk Z., Wojcik K., Wyszyński O., Zimmerman E. D., Zwaska R.
Abstract
AbstractA measurement of charged hadron pair correlations in two-dimensional$$\Delta \eta \Delta \phi $$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 19A, 30A, 40A, 75A, and 150A $$\text {Ge} \text {V}/c$$Ge/c. Measurements were carried out for unlike-sign and like-sign charge hadron pairs independently. The$$C(\Delta \eta ,\Delta \phi )$$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 theEposand UrQMD models are compared to the measurements. Evolution of an enhancement around$$(\Delta \eta ,\Delta \phi ) = (0,0)$$(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.
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
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