【正文】 ite conclusion due to the large error bar 0 1 2 3 4 52 0 0 GeV d +A u RCP( 0 ~ 2 0 % / 4 0 ~ 1 0 0 % )2 0 0 GeV A u +A u RCP( 0 ~ 5 % / 6 0 ~ 8 0 % )6 2 .4 GeV A u +A u RCP( 0 ~ 2 0 % / 6 0 ~ 8 0 % ) (dN/dpT/Nbin)|cent/(dN/dpT/Nbin)|periphPT( GeV/c2)RCP o f ? m es o n Low pT, RCP 1 High pT, RCP 1 STAR Preliminary 2023/6/2829 第 59屆東方論壇，上海 演講完畢，謝謝觀看！ 。中國與 RHICSTAR的國際合作 馬余剛，陳宏芳，程建平 中國 RHICSTAR合作組： 中國科大，清華大學，上海應物所， 華中師大，高能所，近物所 2023/6/2829 2023/6/2829 第 59屆東方論壇，上海 outline ?Chinese RHICSTAR Group ?TOFr and Physics Results ?Impact of Chinese RHICSTAR Group ?Physics with Full TOF Project ?Conclusion 2023/6/2829 第 59屆東方論壇，上海 Chinese RHICSTAR Group History and present anization 2023/6/2829 第 59屆東方論壇，上海 USChina Collaboration on STAR/ RHIC ? A STARChina collaboration has been established (Six Institutions from China) ? University of Science and Technology of China, Hefei (USTC) ? Tsinghua University ? Shanghai Institute of Applied Physics (SINAP) ? Central China Normal University, Wuhan (CCNU) ? Institute of Modern Physics, Lanzhou (IMP) ? Institute of High Energy Physics, Beijing (IHEP) ? Chinese collaborators are playing a major role in physics analyses involving open charm, Cronin effect, and elliptic flow as part of STAR’s focus on studies of a new state of matter (the quarkgluon plasma) at RHIC ? Chinese groups are leading in prototyping and development for a largearea MRPC timeofflight detector for STAR. ? This is the first major USChina collaboration on high energy nuclear physics and we have had a very successful beginning. ? The STARChina TimeofFlight Construction Project has been covered under the USPRC HEP Agreement since 2023 to ensure smooth construction of the TOF detector and operation of the STARChina collaboration. 2023/6/2829 第 59屆東方論壇，上海 Major Milestones of STARChina TOF Project ? CCNU and IHEP joined STAR collaboration in 1999 for TOFp。 A pact object, Rrms~, Rd may be six strange quark state rather than a dibaryon configuration Phenomenological estimation (coalescence/statistical): yield 104_107/central AuAu。 TOF “alone” PID range: pi/k ~, (pi,k)/p ~ m2 m2 ?TOF=110ps ? k p TPC alone TOF “alone” 2023/6/2829 第 59屆東方論壇，上海 Preliminary pion spectra till high pT ?TPC: ? Pion: 0~? Kaon: ~? Proton: ~1 GeV/c ? TOF: ? Pion: ~? Kaon: ~? Proton: ~3 GeV/c ? TPC+TOF: ? Pion: ~10 GeV/c ? Kaon: ~3GeV/c ? Proton: ~5 GeV/c TPC+TOF: 2023/6/2829 第 59屆東方論壇，上海 2023/6/2829 第 59屆東方論壇，上海 Electron identification Combined with TOF， electrons can be separated from pions cleanly Electorns mixed with pions if only dE/dx of TPC is used to identify particles X. Dong, . Xu, LJ Ruan, J Wu et al Lepton decay from heavy quark 2023/6/2829 第 59屆東方論壇，上海 2023/6/2829 第 59屆東方論壇，上海 2023/6/2829 第 59屆東方論壇，上海 RAuAu and RdAu of f 0 . 0 0 . 5 1 . 0 1 . 5 2 . 0 2 . 5 3 . 0 3 . 5 4 . 00 . 40 . 81 . 21 . 62 . 0 P hi k a o n p io n P ro t o n RdAuPT ( Ge V /c2)0 .0 0 .5 1 .0 1 .5 2 .0 2 .5 3 .0 3 .5 4 .00 .00 .51 .01 .52 .02 .5ST A R Prel i m i nary RdA u RAA( 60~ 80/p p ) RAA( 05/p p ) RdAu or RAAPT (G e V/c2)? RdAu of f is closer to that of p and k than that of p ?Particle production at intermediate pT region is sorted by the pa