パートン非束縛相の確実な検証と包括的理解:電子対と光子による複数の透過的測定から

对部分子非束缚相的可靠验证和全面理解：来自使用电子对和光子的多次传输测量

• 批准号: 18340067
• 负责人: 志垣 賢太
• 金额: $ 6.71万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2008
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18340067/
• 关键词: パートン多体系; 原子核衝突実験

本研究では、米国ブルックヘブン国立研究所の相対論的重イオン衝突型加速器RHICを用いた稀事象精密測定実験PHENIXを推進し、電子陽電子対測定と光子測定の有機的結合によるパートン非束縛相の確実な検証と包括的物理理解を目標とした。平成20年度の主な研究成果を列挙する:1.PHENIX実験において金原子核+金原子核衝突事象の比較対照データとなる核子間衝突重心エネルギー√<SNN>=200GeV(RHIC加速器最高エネルギー)における重陽子+金原子核衝突反応の高輝度高統計データ収集を平成19年度末から継続して推進し、従前の積分輝度2.7nb^(-1)の約30倍となる80nb^(-1)を収集した。特に不変質量の小さい領域での電子陽電子対測定および低〜中間横運動量領域の光子測定を主導した。2.RHIC加速器において、前項と並び比較対照データとなる√<S>=200GeVの陽子+陽子衝突の高統計運転を推進した。運転継続中のため到達積分輝度は未詳である。3.収集した金原子核+金原子核,銅原子核+銅原子核、重陽子+金原子核、陽子+陽子衝突事象からの電子陽電子対測定および光子測定に基づき、パートン非束縛相中における軽いベクトル中間子の収量・横運動量スペクトル・質量状態・各崩壊過程への分岐比などを広い運動学領域で系統的に精査し、定量的知見の向上を得た。4.高精度高統計の光子測定に基づき、直接生成光子測定の系統誤差低減を中心に、熱平衡パートン非束縛相からの熱輻射光子探索に向けての進展を得た。5.理論研究者との連携を強化し、今後のRHIC加速器における実験に対する改善の余地を検討し、また欧州合同原子核研究機構で建設中のLHC加速器ALICE実験も視野に、包括的物理理解へ向けた非摂動的量子色力学現象の詳細な議論の礎の構築を推進した。

This research aims to advance the implementation of PHENIX for the precise measurement of rare events using RHIC, a relatively heavy-electron collision accelerator at the National Research Institute of the United States, and to provide a solid theoretical basis and inclusive physical understanding of the non-binding phase through the organic combination of electron-positron measurement and photon measurement. The main research results of Heisei 20th year are listed as follows: 1. PHENIX implementation and comparison of gold + gold nuclear conflict events. The center of gravity of inter-nuclear conflict <SNN>is generated at 200GeV(maximum generation of RHIC accelerator). The high brightness of gold + gold nuclear conflict is statistically high. At the end of Heisei 19th year, the integrated brightness is 2.7nb^(-1) and about 30 times higher than 80nb^(-1). In particular, electron positron measurement in the small mass field and photon measurement in the low to intermediate lateral motion field are dominant. 2. The RHIC accelerator <S>has advanced the high statistical operation of the anode + anode collision at 200GeV. In the middle of the journey, the integral brightness is not detailed. 3. Collection of gold nuclei + gold nuclei, copper nuclei + copper nuclei, double cations + gold nuclei, cations + cations collision phenomena, electron positron pair measurement, photon measurement, electron transfer, mass state, differential ratio of each disintegration process, systematic detailed and quantitative knowledge in the field of kinematics. 4. High precision, high statistical photon measurement, low system error reduction, thermal equilibrium, unbound phase, thermal radiation photon exploration, and progress. 5. Theoretical researchers are exploring ways to enhance connectivity and improve future RHIC accelerator performance, and are advancing their understanding of the physics of ALICE, an LHC accelerator currently under construction at the European Nuclear Research Agency, and the construction of a detailed basis for discussing non-dynamical quantum chromodynamic phenomena.

项目成果

correlated production of p and anti-p in Au+Au collisions at s (NN)**(1/2)=200-GeV

s (NN)**(1/2)=200-GeV 时 Au Au 碰撞中 p 和反 p 的相关产生

• 发表时间: 2007
• 期刊: Phys. Lett. B 649
• 作者: 家正則;岩室史英;舞原俊憲;水本好彦;家正則;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration
• 通讯作者: PHENIX Collaboration

exploration of hot partonic matter at LHC-ALICE

LHC-ALICE 热粒子物质探索

• 发表时间: 2009
• 作者: 家正則;岩室史英;舞原俊憲;水本好彦;家正則;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration (S. S. Adler et al.);PHENIX Collaboration (S. S. Adler et al.);PHENIX Collaboration (A. Adare et al.);PHENIX Collaboration (S. S. Adler et al.);PHENIX Collaboration (S. S. Adler et al.);PHENIX Collaboration (S. S. Adler et al.);PHENIX Collaboration(S. S. Adler et al.);PHENIX Collaboration(S. S. Adler et al.);PHENIX Collaboration(S. S. Adler et al.);PHENIX Collaboration(S. S. Adler et al.);PHENIX Collaboration(S. S. Adler et al.);PHENIX Collaboration(S. S. Adler et al.);PHENIX Collaboration(S. S. Adler et al.);PHENIX Collaboration(S. S. Adler et al.);志垣賢太;志垣賢太
• 通讯作者: 志垣賢太

Measurement of Single Muons at Forward Rapidity in p+p Collisions at s**(1/2)=200-GeV and Implications for Charm Production.

s**(1/2)=200-GeV 时 p p 碰撞中单 μ 子的前向快速测量及其对魅力产生的影响。

• 发表时间: 2007
• 期刊: Physical Review D 76
• 作者: N.Saito;S.S.Adler;et al.;PHENIX Collaboration
• 通讯作者: PHENIX Collaboration

high transverse momentum eta meson production in p+p, d+Au and Au+Au collisions at S (NN)**(1/2)=200-GeV

在 S (NN)**(1/2)=200-GeV 处 p p、d Au 和 Au Au 碰撞中产生高横向动量 eta 介子

• 发表时间: 2007
• 期刊: Phys. Rev. C 75
• 作者: 家正則;岩室史英;舞原俊憲;水本好彦;家正則;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration
• 通讯作者: PHENIX Collaboration

centrality dependence of charged hadron production indeuteron + gold and nucleon + gold collisions atsqrt(sNN)= 200 GeV

氘核金和核子金碰撞中带电强子产生的中心性依赖性 atsqrt(sNN)= 200 GeV

• 发表时间: 2008
• 期刊: Phys. Rev. C 77
• 作者: 家正則;岩室史英;舞原俊憲;水本好彦;家正則;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration;PHENIX Collaboration
• 通讯作者: PHENIX Collaboration