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原子核物理学の新世紀 RHIC ， JHF ，そして理研へ

原子核物理学の新世紀 RHIC ， JHF ，そして理研へ. 2000 年　 ( 奇跡の年） RHIC First Collision Spring-8 First Experiment JHF approved PS での成果と発展 RIBF construction started 理研と京都の蜜月？. 原子核 ハドロングループ 構成と 活動場所. First Collisions at RHIC June 2000. Run-1 Accomplishments. First collisions:15-Jun-00

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原子核物理学の新世紀 RHIC ， JHF ，そして理研へ

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  1. 原子核物理学の新世紀RHIC，JHF，そして理研へ原子核物理学の新世紀RHIC，JHF，そして理研へ 2000年　(奇跡の年） RHIC First Collision Spring-8 First Experiment JHF approved PSでの成果と発展 RIBF construction started 理研と京都の蜜月？

  2. 原子核ハドロングループ構成と活動場所

  3. First Collisions at RHICJune 2000

  4. Run-1 Accomplishments • First collisions:15-Jun-00 • Last collisions: 04-Sep-00 • Recorded ~5M minimum bias events 2001年度になると 　５Mevent/DAY 100TB/Year

  5. PHENIX 検出器とその発展 • 2 central spectrometers 1999 • 2 forward spectrometers 2001 2000 • 3 global detectors 2002

  6. 粒子が1000個来ようとも E/p matching for p>0.5 GeV/c tracks All tracks Electron enriched sample (using RICH)

  7. 0’s pT >2 GeV, asym<0.8 p0Spectra　（鳥井） 美しい p0のピーク 　　→　Ptスペクトラム 周辺衝突の時 　　ｐｐ衝突の実験データで再現可能 X.N. Wang　の “no quenching”予想で再現可能

  8. より中心衝突になると Yieldは予測値を下回る。 Wangの Jet Quenching　予想に近い振る舞い。 　　→　ハドロン物質？ 　　→　クォーク物質？

  9. スピンは？ • ６年前に着手したミューオン検出器が完成、現場に設置　（佐藤） • W→μν,J/ψ→μμ、　で見る陽子内のグルーオンや反クォークの偏極 ここに入る

  10. スネークを使った偏極陽子の加速 ヘリカル超伝導電磁石（スネーク） 陽子 スネークが２この場合：2001年以降 スピンの向きは鉛直方向 スネークが１個の場合：2000年 スピンの向きは水平方向 で回転しながらリングを回る

  11. pC CNI Polarimeter Testin AGS E950 ＆京大タンデム　（東城）　 基本は偏極の保持 By J.Tojo, N.Saito Analyzing Power up Si #3 Si #1 right left Si #2 Si #4 down -t (GeV/c)2

  12. pC CNI Polarimeter Testin AGS E950 & Kyoto Tandem Gg=46.5 Injection energy Snake OFF Vertical polarization Gg=46.5 Injection energy Snake ON Horizontal polarization Gg=48 Acceleration with Snake ON Horizontal polarization Gg=48 Acceleration with Snake OFF Polarization lost Polarization with Snake magnet ON/OFF up Si #3 Si #1 right left Si #2 Si #4 down

  13. RIKEN budget for RHIC Spin and RIKEN BNL Research Center 政池，今井，延與が京都大学に 集まっていたので立ち上がった プロジェクト。 これから60億円分の成果を出す！ • RBRC • T.D. Lee, N. Samios, H.E. • Theory and Exp. • RHIC Spin Program • Snake, Spin Rotator, PHENIX, polarimeter • PHENIX Upgrade • これまでの 総額60億

  14. TowardJHF

  15. スケジュール φ 　　　　　　　　小沢、田原、成木　　　　武藤　　　　 ハイパー核 　　　　　市川、　　　　　　高橋　　　　Yoon 　　　 関　

  16. KEK-PS　ハイライト　2000 歴史上一番美しい ダブルハイパー核 軽くなったρ・ω？

  17. PSE325　（φ）

  18. ‘98 data (Electron Channel) Nucl-ex-0011013 田原，成木，武藤，佐久間 • ω→e+e－　　SignificantDifferencebetween C and Cu • The first observation of in-medium decay of vector mesons.

  19. Target Mass Dependence ofs(φ,ω)→e+e- (’99) ω→e+e－ a= 0.63± 0.07 for ω a=1.03± 0.15 for φ C/CH2 φ→e+e－

  20. Report on the review of KEK-PS scientific activities 1995-2000 KEK-PS　外部評価委員会 This very topical experiment addresses the issue of dropping meson masses in dense matter by bomberding nuclear target with 12 GeV protons to form φ,ω and ρ mesons. The subject is being dealt with also, but differently, by other laboratories. The instrumentation used in this experiment is very nice, and the preliminary results show medium effect. With CERES still not having better data, and with the beautiful appearance of φ mass peak in this experiment, it should be a high priority to complete the analysis of the 1999 data. Experimentally more work has to be done particularly for the in-medium decay of ω and ρmesons. Hence, this experiment deserves continuation with high priority.

  21. Name OtherAffiliations Activity @ Chief Scientist Hideto Enyo RBRC PHENIX,CCJ,KEK W Former Chief Scientist Masayasu Ishihara RBRC PHENIX,RIB W Vice Chief Scientist Takashi Ichihara RBRC PHENIX,CCJ,RIB W Scientist Yasusi Watanabe RBRC PHENIX,CCJ,RIB W Atsushi Taketani PHENIX B Takashi Kishida RIB W Naohito Saito RBRC PHENIX B Postdoctoral Fellow Jiro Murata PHENIX B Satoshi Yokkaichi PHENIX,CCJ W Hideyuki Kobayashi RBRC PHENIX B Yutaka Watanabe RIB W Contract Researcher Yutaka Mizoi RIB W Osamu Jinnouchi PHENIX W Tsugutika Tabaru PHENIX,KEK W Senior Visiting Scientist Shoji Nagamiya KEK PHENIX Ken Imai Kyoto-U PHENIX ToshiAki Shibata T.I.Tech PHENIX Yasuyuki Gono Kyusyu-U RIB Collaborating Scientist Naoki Hayashi JAERI PHENIX,CCJ Shin'ya Sawada KEK PHENIX,CCJ Hideki Hamagaki CNS,U-Tokyo PHENIX,CCJ Motobayasi Rikkyo-U RIB Sakurai U-Tokyo RIB W Aoi U-Tokyo RIB W Nakamura T.I.Tech RIB W Yajun Mao PHENIX B Student Junji Tojo Kyoto-U,JSPS PHENIX B Hisayuki Torii Kyoto-U, JRA PHENIX B Hiroki Sato Kyoto-U,JSPS PHENIX B Nobuyuki Kamihara T.I.Tech,JRA2 PHENIX B Megumi Naruki Kyoto-U,JSPS KEK-E325 W Ryotaro Muto Kyoto-U,JSPS KEK-E325 W Fuminori Sakuma Kyoto-U,JRA2 KEK-E325 W Tomoko Gomi Rikkyo-U, JRA RIB W Name OtherAffiliation @ Senior Visiting Scientist Koichi Yazaki T.W.U. W Tetsuo Matsui U-Tokyo Post Doc Kennichi Naito W Yoshiaki Yasui W Name Other Affiliation Noriyoshi Ishii W Center Director T.D. Lee Columbia U Hirai W Deputy Director Nick Samios BNL Collaborating Scientist Shigemi Ohta KEK,RBRC EXP Group reader Hideto En'yo RIKEN Deputy Group reader Gerry Bunce BNL Fellow Matthias G. Perdekamp Abhay L. Deshpande Brenden FOX Kazuyoshi Kurita Yuji Goto New Mexico U Post Doc Alexander Bazilevsky 和光（実験） そして理研・放射線研へ 和光（理論） RIBF　関係者 RBRC（実験） 京大院生（QH)

  22. 平成の幕開けに赴任新世紀の幕開けに退場12年間お世話になりました平成の幕開けに赴任新世紀の幕開けに退場12年間お世話になりました

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