Features of short-living neutral kaon production in copper-gold nuclei collisions at 200 GeV / Особенности рождения короткоживущих нейтральных каонов в столкновениях ядер меди и золота при энергии 200 ГэВ

• Published in: St. Petersburg State Polytechnical University Journal. Physics and Mathematics Vol. 12; no. 3; p. 131
• Main Authors: Berdnikov Alexander Ya, Berdnikov, Yaroslav A, Zharko, Sergey V, Kotov, Dmitry O, Radzevich, Pavel V
• Format: Journal Article
• Language: English; Russian
• Published: St. Petersburg Peter the Great St. Petersburg State Polytechnical University 01.01.2019
• Subjects: Collisions; Copper; Gold; Kaon production; Kaons; Mesons; Nuclei; Quarks; Relativistic Heavy Ion Collider; Transverse momentum
• ISSN: 2304-9782
• DOI: 10.18721/JPM.12311

In this study, invariant transverse momentum spectra and nuclear modification factors of KS mesons produced in collisions of copper and gold nuclei (Cu + Au) at energy of 200 GeV have been measured. The research was carried out using the PHENIX spectrometer located at RHIC. The obtained KS meson nuclear modification factor values were compared with similar ones of η and π0 mesons along with hadronic jets measured under the same conditions. Moreover, the obtained values mentioned were compared with the corresponding data on KS mesons produced in binary collisions of gold and copper nuclei (Au + Au, Cu + Cu) at energy of 200 GeV as well. An analysis of the derived results pointed to the independence of the jet-quenching effect in the Cu + Au, Cu + Cu and Au + Au collisions at energy of 200 GeV from nuclear overlap form produced in these systems.