Measurements of $\Xi^{-}$ and $\overline{\Xi}^{+}$ production in proton-proton interactions at $\sqrt{s_{NN}}$ = 17.3 GeV in the NA61/SHINE experiment
Collaboration NA/SHINE,:,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.,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.
arxiv（2020）
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摘要
The production of $\Xi(1321)^{-}$ and $\overline{\Xi}(1321)^{+}$ hyperons in inelastic p+p interactions is studied in a fixed target experiment at a beam momentum of 158 GeV/textit{c}. Double differential distributions in rapidity y and transverse momentum $p_{T}$ are obtained from a sample of 33M inelastic events. They allow to extrapolate the spectra to full phase space and to determine the mean multiplicity of both $\Xi^{-}$ and $\overline{\Xi}^{+}$. The rapidity and transverse momentum spectra are compared to transport model predictions. The $\Xi^{-}$ mean multiplicity in inelastic p+p interactions at 158~\GeVc is used to quantify the strangeness enhancement in A+A collisions at the same centre-of-mass energy per nucleon pair.
