title: Ð¡Ð¿ÐµÐºÑÑÑ Ð¿Ð¾ Ð¿Ð¾Ð¿ÐµÑÐµÑÐ½Ð¾Ð¼Ñ Ð¸Ð¼Ð¿ÑÐ»ÑÑÑ Ð¿ÑÑÐ¼ÑÑ ÑÐ¾ÑÐ¾Ð½Ð¾Ð² Ð² ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸ÑÑ 3He+Au Ð¿ÑÐ¸ ÑÐ½ÐµÑÐ³Ð¸Ð¸ 200 ÐÑÐ/Ð½ÑÐºÐ»Ð¾Ð½
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Direct photon transverse momentum spectra in 3He+Au collisions at 200 GeV/nucleon
Creators: name: ÐÐ°Ð²Ð·Ð´ÐµÑÐ¸Ð½, ÐÐ°Ð²ÐµÐ»
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ñ ÑÑÐ¶ÐµÐ»ÑÑ Ð¸Ð¾Ð½Ð¾Ð²
Ð¿ÑÑÐ¼ÑÐµ ÑÐ¾ÑÐ¾Ð½Ñ
ÐºÐ²Ð°ÑÐº-Ð³Ð»ÑÐ¾Ð½Ð½Ð°Ñ Ð¿Ð»Ð°Ð·Ð¼Ð°
Ð²Ð½ÐµÑÐ½ÑÑ ÐºÐ¾Ð½Ð²ÐµÑÑÐ¸Ñ
Ð¸Ð½Ð²Ð°ÑÐ¸Ð°Ð½ÑÐ½ÑÐ¹ ÑÐ¿ÐµÐºÑÑ
PHENIX
RHIC
heavy-ion collisions
direct photons
quark-qluon plasma
external conversion
invariant spectrum

description: Ð¡ÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ñ ÑÑÐ¶ÐµÐ»ÑÑ ÑÐµÐ»ÑÑÐ¸Ð²Ð¸ÑÑÑÐºÐ¸Ñ Ð¸Ð¾Ð½Ð¾Ð² Ð¿Ð¾Ð·Ð²Ð¾Ð»ÑÑÑ Ð¸Ð·ÑÑÐ°ÑÑ ÑÐ²Ð¾Ð¹ÑÑÐ²Ð° ÐºÐ²Ð°ÑÐº-Ð³Ð»ÑÐ¾Ð½Ð½Ð¾Ð¹ Ð¿Ð»Ð°Ð·Ð¼Ñ (ÐÐÐ), ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ñ Ð²ÐµÑÐµÑÑÐ²Ð°, Ð² ÐºÐ¾ÑÐ¾ÑÐ¾Ð¼ ÐºÐ²Ð°ÑÐºÐ¸ Ð¸ Ð³Ð»ÑÐ¾Ð½Ñ Ð½Ð°ÑÐ¾Ð´ÑÑÑÑ Ð² ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ð¸ Ð´ÐµÐºÐ¾Ð½ÑÐ°Ð¹Ð½Ð¼ÐµÐ½ÑÐ°. ÐÐ±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ðµ ÐÐÐ Ð¿Ð¾Ð´ÑÐ²ÐµÑÐ¶Ð´ÐµÐ½Ð¾ ÐºÐ¾ÑÐ²ÐµÐ½Ð½ÑÐ¼Ð¸ Ð½Ð°Ð±Ð»ÑÐ´ÐµÐ½Ð¸ÑÐ¼Ð¸ Ð² ÑÑÐ¶ÐµÐ»ÑÑ ÑÐ¸ÑÑÐµÐ¼Ð°Ñ ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ð¹ (Ð½Ð°Ð¿ÑÐ¸Ð¼ÐµÑ, ÑÑÑÐµÐºÑ Ð³Ð°ÑÐµÐ½Ð¸Ñ ÑÑÑÑÐ¹). Ð¡Ð¸ÑÑÐµÐ¼Ð° Ð²Ð·Ð°Ð¸Ð¼Ð¾Ð´ÐµÐ¹ÑÑÐ²Ð¸Ð¹ 3He+Au ÑÐ²Ð»ÑÐµÑÑÑ Ð¿ÑÐ¾Ð¼ÐµÐ¶ÑÑÐ¾ÑÐ½Ð¾Ð¹ Ð¼ÐµÐ¶Ð´Ñ ÑÐ°ÐºÐ¸Ð¼Ð¸, ÐºÐ°Ðº p+p Ð¸ Au+Au, Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ðµ ÐÐÐ Ð² Ð½ÐµÐ¹ Ð¾ÐºÐ¾Ð½ÑÐ°ÑÐµÐ»ÑÐ½Ð¾ Ð½Ðµ Ð¿Ð¾Ð´ÑÐ²ÐµÑÐ¶Ð´ÐµÐ½Ð¾. ÐÑÑÐ¼ÑÐµ ÑÐ¾ÑÐ¾Ð½Ñ ÑÐ»ÑÐ¶Ð°Ñ Ð¿Ð¾Ð»ÐµÐ·Ð½ÑÐ¼ Ð¸Ð½ÑÑÑÑÐ¼ÐµÐ½ÑÐ¾Ð¼ Ð¿ÑÐ¸ Ð¸Ð·ÑÑÐµÐ½Ð¸Ð¸ ÑÐ°ÐºÐ¸Ñ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸Ðº ÐÐÐ, ÐºÐ°Ðº ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÐ°. ÐÐ°Ð»Ð¸ÑÐ¸Ðµ ÑÐ¸Ð³Ð½Ð°Ð»Ð° ÑÐµÐ¿Ð»Ð¾Ð²ÑÑ (Ñ ÑÐ½ÐµÑÐ³Ð¸ÑÐ¼Ð¸ Ð¾Ñ Ð½ÐµÑÐºÐ¾Ð»ÑÐºÐ¸Ñ ÑÐ¾ÑÐµÐ½ ÐÑÐ Ð´Ð¾ Ð½ÐµÑÐºÐ¾Ð»ÑÐºÐ¸Ñ ÐÑÐ) Ð¿ÑÑÐ¼ÑÑ ÑÐ¾ÑÐ¾Ð½Ð¾Ð² Ð¼Ð¾Ð¶ÐµÑ Ð³Ð¾Ð²Ð¾ÑÐ¸ÑÑ Ð¾Ð± Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ð¸ ÐÐÐ Ð² ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÐµÐ¼Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ðµ. Ð ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð¾ Ð¾Ð¿Ð¸ÑÐ°Ð½Ð¸Ðµ Ð¸ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ðµ Ð¼ÐµÑÐ¾Ð´Ð° Ð²Ð½ÐµÑÐ½ÐµÐ¹ ÐºÐ¾Ð½Ð²ÐµÑÑÐ¸Ð¸ ÑÐµÐ³Ð¸ÑÑÑÐ°ÑÐ¸Ð¸ Ð¿ÑÑÐ¼ÑÑ ÑÐ¾ÑÐ¾Ð½Ð¾Ð², ÑÐ¾Ð¶Ð´ÐµÐ½Ð½ÑÑ Ð² ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸ÑÑ ÑÐ´ÐµÑ 3He+AuÂ  Ð¿ÑÐ¸ ÑÐ½ÐµÑÐ³Ð¸Ð¸ âsNN= 200ÐÑÐ Ð² ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐµ PHENIX. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð° Ð¿Ð¾Ð´Ð³Ð¾ÑÐ¾Ð²ÐºÐ° ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÑ Ð´Ð°Ð½Ð½ÑÑ Ðº Ð°Ð½Ð°Ð»Ð¸Ð·Ñ, Ð¿Ð¾Ð»ÑÑÐµÐ½ Ð¸Ð½Ð²Ð°ÑÐ¸Ð°Ð½ÑÐ½ÑÐ¹ ÑÐ¿ÐµÐºÑÑ Ð¿ÑÑÐ¼ÑÑ ÑÐ¾ÑÐ¾Ð½Ð¾Ð² Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ð¼Ð°Ð»ÑÑ Ð¿Ð¾Ð¿ÐµÑÐµÑÐ½ÑÑ Ð¸Ð¼Ð¿ÑÐ»ÑÑÐ¾Ð², Ð¾Ð¿Ð¸ÑÐ°Ð½Ð° Ð¼ÐµÑÐ¾Ð´Ð¸ÐºÐ° Ð¿Ð¾Ð»ÑÑÐµÐ½Ð¸Ñ ÑÐ¿ÐµÐºÑÑÐ° Ð¿ÑÑÐ¼ÑÑ ÑÐ¾ÑÐ¾Ð½Ð¾Ð² Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ð±Ð¾Ð»ÑÑÐ¸Ñ Ð¿Ð¾Ð¿ÐµÑÐµÑÐ½ÑÑ Ð¸Ð¼Ð¿ÑÐ»ÑÑÐ¾Ð². ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð² Ð¸ Ð¾ÑÐµÐ½ÐµÐ½Ñ Ð¿ÐµÑÑÐ¿ÐµÐºÑÐ¸Ð²Ñ Ð´Ð°Ð»ÑÐ½ÐµÐ¹ÑÐ¸Ñ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ð¹.
description: Relativistic heavy ion collisions make it possible to study properties of quark-gluon plasma (QGP), the state of matter in which quarks and gluons are deconfined. QGP formation was confirmed in heavy system collisions by indirect observations (for example, jet-quenching). Formation of QGP has not been conclusively confirmed in intermediate (between p+p and Au+Au) interaction system 3He+Au. Direct photons serve as useful tool for probing such characteristics of QGP as temperature. The presence of thermal (with energies from several hundred MeV to several GeV) direct photons signal may indicate the formation of QGP in the considered system. The study consists of description and application of external conversion method to direct photon detection in 3He+Au nuclei collisions at âsNN= 200 GeV in PHENIX experiment. The preparation of experimental data for analysis is carried out and the direct photon invariant spectrum in the region of low transverse momenta is obtained. The technique for obtaining direct photon spectrum in region of high transverse momenta is described. The results are analyzed and future research prospects are stated.