Measurements of pi ^pm , K^pm , p and bar{p} spectra in ^7Be+^9Be collisions at beam momenta from 19A to 150A {mathrm{Ge} mathrm{V}}!/!c with the NA61/SHINE spectrometer at the CERN SPS

A Acharya,L Turko,D Larsen,V A Kireyeu,K Kadija,M Gaździcki,A Kurepin,A Krasnoperov,A Rybicki,V Matveev,Y Nagai,S Kowalski,K Schmidt,H Ströbele,J Puzović,R Renfordt,M Deveaux,S Puławski,K Łojek,O Wyszyński,M Słodkowski,R Ulrich,V Ozvenchuk,T Czopowicz,V Babkin,R Płaneta,M Ćirković,M Roth,T Šuša,K Grebieszkow,A Aduszkiewicz,I Selyuzhenkov,D Röhrich,P Dorosz,M Golubeva,M Baszczyk,M Posiadała-Zezula,Z Włodarczyk,Ł Mik,W Kucewicz,B Kozłowski,W Bryliński,M Maćkowiak-Pawłowska,S N Igolkin,F Guber,S Mrówczyński,S Sadhu,M Naskręt,D Veberič,A Wickremasinghe,H.j Mathes ,S V Morozov ,E Kashirin,T Matulewicz,B Maksiak,M Rumyantsev,Z Majka,A Bravar,N Davis,H Adhikary,A Tefelska,A Rustamov,V Golovatyuk ,J Cybowska,A O Merzlaya,W Dominik,A Ivashkin,A Yu Seryakov,A Blondel,D Uzhva,A Sadovsky,M Kozieł ,E Rondio,T Antičić ,D Pszczel,M M Kielbowicz ,A Korzenev,J Dumarchez,А А Гарибов ,A Damyanova,D S Prokhorova,A Malakhov ,Г Феофилов ,V Kovalenko ,Ф Ф Валиев ,Á László ,В Терещенко ,Evgeny Andronov ,S Johnson ,S Ilieva,Maciej Piotr Lewicki ,Б Popov ,D Kolev,Adam Bzdak ,M Kuich,V Kolesnikov ,M Deliyergiyev,A Haesler,G Stefanek,A D Marino,M Buryakov,K Márton ,M Rybczyński ,R Tsenov,D Tefelski,P Podlaski,B Pórfy ,L Fields,A Taranenko,M Unger,H Cherif,B Messerly,S Bhosale,E D Zimmerman,A Marcinek,J Brzychczyk,V Lyubushkin ,M Ravonel,B T Rumberger,Н Каргин ,Z Fodor,O Petukhov,O Busygina,K Wôjcik ,M Bogomilov,A V Brandin ,O Golosov,G L Melkumov,A Dmitriev ,V Paolone,V Vechernin ,T Lazareva ,P Seyboth,J Steṕaniak ,M Strikhanov,V P Klochkov ,A Toia,R Engel,P Staszel,M Csanád ,K K Allison,R Zwaska

doi:10.1140/epjc/s10052-020-08733-x

Abstract

The NA61/SHINE experiment at the CERN Super Proton Synchrotron (SPS) studies the onset of deconfinement in hadron matter by a scan of particle production in collisions of nuclei with various sizes at a set of energies covering the SPS energy range. This paper presents results on inclusive double-differential spectra, transverse momentum and rapidity distributions and mean multiplicities of pi ^pm , K^pm , p and bar{p} produced in the 20% most central^7Be+^9Be collisions at beam momenta of 19A, 30A, 40A, 75A and 150A {mathrm{Ge} mathrm{V}}!/!c. The energy dependence of the K^pm /pi ^pm ratios as well as of inverse slope parameters of the K^pm transverse mass distributions are close to those found in inelastic p+p reactions. The new results are compared to the world data on p+p and Pb+Pb collisions as well as to predictions of the Epos, Urqmd, Ampt, Phsd and Smash models.

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