학술논문
Two-particle correlations in azimuthal angle and pseudorapidity in central $$^7\hbox {Be}+{}^9\hbox {Be}$$ 7 Be + 9 Be collisions at the CERN Super Proton Synchrotron
Document Type
article
Author
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; NA61/SHINE Collaboration
Source
European Physical Journal C: Particles and Fields, Vol 80, Iss 12, Pp 1-20 (2020)
Subject
Language
English
ISSN
1434-6044
1434-6052
1434-6052
Abstract
Abstract A measurement of charged hadron pair correlations in two-dimensional $$\Delta \eta \Delta \phi $$ Δ η Δ ϕ 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 ( Δ η , Δ ϕ ) 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 $$(\Delta \eta ,\Delta \phi ) = (0,0)$$ ( Δ η , Δ ϕ ) = ( 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.