1998 Fiscal Year Annual Research Report

CP非保存の物理

Research Project

Project/Area Number	09246103
Research Institution	Nagoya University
Principal Investigator	三田一郎名古屋大学, 大学院・理学研究科, 教授 (60242806)
Co-Investigator(Kenkyū-buntansha)	渡邊靖志東京工業大学, 大学院・理工学研究科, 教授 (40126199) 吉村太彦東北大学, 大学院・理学研究科, 教授 (70108447) 小林誠高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (90025453) 大島隆義名古屋大学, 大学院理学研究科, 教授 (00134651) 相原博昭東京大学, 大学院・理学系研究科, 助教授 (60167773)
Keywords	B-Physics / エアロゲル / 検出器の開発 / CSI / 粒子識別検出器 / B中間子
Research Abstract	(1) 1月5日に総括班会議を高エネルギー加速器研究機構で開催した。 (2) Bの物理workshopを9/3-9/5に志賀高原で開催しBelle Collaborationの若手向き講義を行った。 (3) 実験ワークショップを鳴子川渡で開催し、Be11eのシュミレーションの結果を発表した。10/29-10/31 (4) Summer Instituteを高エネルギー加速器研究機構で8/25-8/29に開催。100名以上の参加者が全国から集まり、Belleの実験に関連する講義を行った。総括班会議:1月5田こ総括班会議を高エネルギー物理学研究所で開催した。 Belle spectrometerの建設最終段階であり、その進捗状況と実験開始までの見通しを議論した。 A0l:高性能マルチCPUのデータ解析システムを完成させ、B中間子崩壊解析プログラムを開発した。また、崩壊位置測定精度の改善を目指したピクセル型シリコン検出器の開発、特に、読み出し集積回路の試作とテストが進んでいる。 A02:物理解析の準備状況の報告とparticle ID検出器のR&Dの現状報告。特に、後者に関しては、DIRCに代わり、time-of-propagatiOn(TOP)counterを考案し、そのfeasibilityをシミュレーションstudyし、テストカウンターを製作し、ビームテストを進めている。同時に、fine-mesh multi-anode photo-tubeの開発研究も並行して進行している。 A3:標準模型をこえる物理を測定する方法を集中的に検討した。特にMinimal Supergravityの枠内でB崩壊、ミュウ中間子崩壊、K中間子崩壊などで標準模型の予言からどのくらいずれるか、実際に実験で測れるか検討した。総括班会議では、もう少しB崩壊に的を絞ったほうが良いとの意見が出た。外国出張;◆三田(1)5/12〜17台湾:Bworkshop(2)10/5〜12アメリカ:国際会議(3)11/11〜16アメリカ:Tamura Simposium(4)1/22〜31ケープタウン:国際会議WIN99で研究成果の発表 ◆田島(1)8/4〜8ノルウェー(2)10/4〜11イタリア ◆大島(1)9/12〜22スペイン外国人研究者招聘:I.I.Bigi(1)11/2〜11(2)2/27〜3/13共同研究のため

Research Products
(30 results)

All Other

All Publications (30 results)

[Publications] B.Abbott: "Probing hard color singlet exchange in P anti-P clollisions at S^★^★(1/2)=630-Gev and 1800-Gev" Physics Letters. B440. 189-202 (1998)
[Publications] B.Abbott: "A search for heavy pointlike dirac monopoles" Physical Review Letters. 81. 524-529 (1998)
[Publications] B.Abbott: "Limits on anomalous W W gamma and W W Z couplings" Physical Review. D58. 031102/1-13 (1998)
[Publications] B.Abbott: "Search for charge 1/3 third generation leptoquarks in P anti-P collisions at S^★^★(1/2)=1.8-Tev" Physical Review Letters. 81. 38-43 (1998)
[Publications] B.Abbott: "Limits on WW gamma and WWZ couplings from W boson pair production" Physical Review. D58. 051101/1-10 (1998)
[Publications] B.Abbott: "Measurement of the shape of the transverse momemtum distibution of W bosons produced in P anti-P collision at S^★^★(1/2)=1.8-Tev" Physical Review Letters. 80. 5498-5503 (1998)
[Publications] B.Abbott: "Search for the decay B--X(S)mu+mu-" Physics Letters. B423. 419-426 (1998)
[Publications] B.Abbott: "Direct measurement of the top quark mass at do" Physical Review. D58. 052001/1-43 (1998)
[Publications] B.Abbott: "A measurement of the W boson mass" Physical Review. D58. 092003/1-48 (1998)
[Publications] M.Shiozawa: "Search for proton decay via P--e+pio in A large water cerenkov detector" Physical Review Letters. 81. 3319-3323 (1998)
[Publications] Y.Fukuda: "Measurements of solar neutrino.flux from SUPERKAMIOKANDE S first 300 days" Physical Review Letters. 81. 1158-1162 (1998)
[Publications] Y.Fukuda: "Study of the atmospheric neutrino flux in the multi-gev energy range" Physics Letters. B436. 33-41 (1998)
[Publications] N.Saito: "Spin physics with the phenix detector system" Nuclear Physics. A638. 575-578 (1998)
[Publications] D.P.Morrison: "The Phenix experimet at RHIC" Nuclear Physics. A638. 565-570 (1998)
[Publications] Y.Fukuda: "Measurement of a small atmospheric muon-neutrino/electron-neutrion ratio" Physics Letters. B433. 9-18 (1998)
[Publications] M.Katoh: "Reconstruction for the brilliance-upgrading project of the photon factory storage ring" J.Synchrotron Radiat.5. 366-368 (1998)
[Publications] E.Eskut: "Search for muon neutrino -- tau neutrino oscillation using the tau decay M odes into A single" Physics Letters. B434. 205-213 (1998)
[Publications] K.Hara: "LA-DOPED PBWO(4)xcintillating crystals grown in large ingots" Nucl.Instrum.Meth.A414. 325-331 (1998)
[Publications] B.Abbott: "A measurement of the W boson mass" Physical Review Letters. 80. 3008/1-11 (1998)
[Publications] T.Ohshima: "Examination of T/CP invariance in the e+e- -- tau+ tau- reaction" Progress of Theoretical Physics. 99. 413-422 (1998)
[Publications] Y.Fujita: "Test of charge to time conversion and multihit TDC techinque for the BELL CDC readout" Nucl.Instrum.Meth.A405. 105-110 (1998)
[Publications] I.Joichi: "Prolonged decay and CP asymmetry" Physical Review. D58. 043507/1-33 (1998)
[Publications] I.Joichi: "Time evolution of unstable particle decay seen with finite resolution" Physical Review. D58. 045004/1-26 (1998)
[Publications] I.Joichi: "Quantum dissipation and decay in medium" Physical Review. A57. 798/1-10 (1998)
[Publications] M.Aoki: "Study of baryon production mechanism in e+e- annihilation into hadrons" Physics Letters. B440. 386-392 (1998)
[Publications] H.S.Ahn: "Study fo characteristics of the BELL CSI calorimeter prototype with A binp T agged photon beam" Nucl Instrum Meth.A410. 179-194 (1998)
[Publications] Y.Fukuda: "Evidence for oscillation of atmospheric neutinos" Physical Review Letters. 81. 1562-1567 (1998)
[Publications] I.Bigi: "On the sign ot CP asymmetry" Physical Review. (発表予定).
[Publications] E.Eskut: "A search for muon-neutrino -- tau-neutrino oscillation" Physics Letters. B424. 202-212 (1998)
[Publications] M.Nomachi: "First experiment at RCNP on P P bremsstrahlung at 400-Mev" Nucl.Phys.A629. 213c-217c (1998)

1998 Fiscal Year Annual Research Report

CP非保存の物理

Principal Investigator

三田 一郎 名古屋大学, 大学院・理学研究科, 教授 (60242806)

Research Products

[Publications] B.Abbott: "Probing hard color singlet exchange in P anti-P clollisions at S^★^★(1/2)=630-Gev and 1800-Gev" Physics Letters. B440. 189-202 (1998)

[Publications] B.Abbott: "A search for heavy pointlike dirac monopoles" Physical Review Letters. 81. 524-529 (1998)

[Publications] B.Abbott: "Limits on anomalous W W gamma and W W Z couplings" Physical Review. D58. 031102/1-13 (1998)

[Publications] B.Abbott: "Search for charge 1/3 third generation leptoquarks in P anti-P collisions at S^★^★(1/2)=1.8-Tev" Physical Review Letters. 81. 38-43 (1998)

[Publications] B.Abbott: "Limits on WW gamma and WWZ couplings from W boson pair production" Physical Review. D58. 051101/1-10 (1998)

[Publications] B.Abbott: "Measurement of the shape of the transverse momemtum distibution of W bosons produced in P anti-P collision at S^★^★(1/2)=1.8-Tev" Physical Review Letters. 80. 5498-5503 (1998)

[Publications] B.Abbott: "Search for the decay B--X(S)mu+mu-" Physics Letters. B423. 419-426 (1998)

[Publications] B.Abbott: "Direct measurement of the top quark mass at do" Physical Review. D58. 052001/1-43 (1998)

[Publications] B.Abbott: "A measurement of the W boson mass" Physical Review. D58. 092003/1-48 (1998)

[Publications] M.Shiozawa: "Search for proton decay via P--e+pio in A large water cerenkov detector" Physical Review Letters. 81. 3319-3323 (1998)

[Publications] Y.Fukuda: "Measurements of solar neutrino.flux from SUPERKAMIOKANDE S first 300 days" Physical Review Letters. 81. 1158-1162 (1998)

[Publications] Y.Fukuda: "Study of the atmospheric neutrino flux in the multi-gev energy range" Physics Letters. B436. 33-41 (1998)

[Publications] N.Saito: "Spin physics with the phenix detector system" Nuclear Physics. A638. 575-578 (1998)

[Publications] D.P.Morrison: "The Phenix experimet at RHIC" Nuclear Physics. A638. 565-570 (1998)

[Publications] Y.Fukuda: "Measurement of a small atmospheric muon-neutrino/electron-neutrion ratio" Physics Letters. B433. 9-18 (1998)

[Publications] M.Katoh: "Reconstruction for the brilliance-upgrading project of the photon factory storage ring" J.Synchrotron Radiat.5. 366-368 (1998)

[Publications] E.Eskut: "Search for muon neutrino -- tau neutrino oscillation using the tau decay M odes into A single" Physics Letters. B434. 205-213 (1998)

[Publications] K.Hara: "LA-DOPED PBWO(4)xcintillating crystals grown in large ingots" Nucl.Instrum.Meth.A414. 325-331 (1998)

[Publications] B.Abbott: "A measurement of the W boson mass" Physical Review Letters. 80. 3008/1-11 (1998)

[Publications] T.Ohshima: "Examination of T/CP invariance in the e+e- -- tau+ tau- reaction" Progress of Theoretical Physics. 99. 413-422 (1998)

[Publications] Y.Fujita: "Test of charge to time conversion and multihit TDC techinque for the BELL CDC readout" Nucl.Instrum.Meth.A405. 105-110 (1998)

[Publications] I.Joichi: "Prolonged decay and CP asymmetry" Physical Review. D58. 043507/1-33 (1998)

[Publications] I.Joichi: "Time evolution of unstable particle decay seen with finite resolution" Physical Review. D58. 045004/1-26 (1998)

[Publications] I.Joichi: "Quantum dissipation and decay in medium" Physical Review. A57. 798/1-10 (1998)

[Publications] M.Aoki: "Study of baryon production mechanism in e+e- annihilation into hadrons" Physics Letters. B440. 386-392 (1998)

[Publications] H.S.Ahn: "Study fo characteristics of the BELL CSI calorimeter prototype with A binp T agged photon beam" Nucl Instrum Meth.A410. 179-194 (1998)

[Publications] Y.Fukuda: "Evidence for oscillation of atmospheric neutinos" Physical Review Letters. 81. 1562-1567 (1998)

[Publications] I.Bigi: "On the sign ot CP asymmetry" Physical Review. (発表予定).

[Publications] E.Eskut: "A search for muon-neutrino -- tau-neutrino oscillation" Physics Letters. B424. 202-212 (1998)

[Publications] M.Nomachi: "First experiment at RCNP on P P bremsstrahlung at 400-Mev" Nucl.Phys.A629. 213c-217c (1998)

三田一郎名古屋大学, 大学院・理学研究科, 教授 (60242806)