Top and Bottom Flavor Physics at Proton Anti-proton Collider Experiment CDF

2011 Fiscal Year Final Research Report

• Project Area: New Developments of Flavor Physics
• Project/Area Number: 18071002
• Research Category: Grant-in-Aid for Scientific Research on Priority Areas
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: University of Tsukuba
• Principal Investigator: KIM Shin-hong 筑波大学, 数理物質系, 教授 (50161609)
• Co-Investigator(Kenkyū-buntansha): UKEGAWA Fumihiko 筑波大学, 数理物質系, 教授 (10312795) ; HARA Kazuhiko 筑波大学, 数理物質系, 准教授 (20218613) ; TAKEUCHI Yuji 筑波大学, 数理物質系, 講師 (00375403) ; MARUYAMA Takasumi 筑波大学, 数理物質系, 講師 (80375401)
• Project Period (FY): 2006 – 2011
• Keywords: トップクォーク / B_s, B_c中間子 / 陽子反陽子衝突実験(CDF) / 粒子・反粒子対称性の破れ / 小林益川混合行列 / 超対称性理論 / 物質宇宙の起源 / 国際協力実験

Research Abstract

We succeeded in observing the Bs meson oscillation and the single top quark production, and determining the Kobayashi-Maskawa matrix elements very accurately. Thus we could test the Kobayashi-Maskawa theory with high precision. Further as an unexpected result, we found the forward-backward asymmetry of top quark pair production larger than theoretical prediction by more than 2σ.

Research Products

• [Journal Article] The CDF Collaboration, "Measurements of the Angular Distributions in the Decays B→K^<(*)>μ+μ^- at CDF" (2012)
  • Author(s): A. Aaltonen, K. Hara, S.H. Kim, Y. Takeuchi, F. Ukegawa, et al.
  • Journal Title: Phys. Rev. Lett. Volume: 108 Pages: 081807
  • DOI: DOI:0.1103/PhysRevLett.108.081807
  • Peer Reviewed
• [Journal Article] The CDF Collaboration, "Measurement of CP Violating Phase β_s in B^o_s → J/ψφ Decays" (2012)
  • Author(s): A. Aaltonen, K. Hara, S.H. Kim, Y. Takeuchi, F. Ukegawa, et al.
  • Journal Title: Phys. Rev. D Volume: 85 Pages: 072002
  • DOI: DOI:10.1103/PhysRevD.85.072002
  • Peer Reviewed
• [Journal Article] The CDF Collaboration, "Evidence for a Mass Dependent Forward-Backward Asymmetry in Top Quark Pair Production" (2011)
  • Author(s): A. Aaltonen, K. Hara, S.H. Kim, Y. Takeuchi, F. Ukegawa, et al.
  • Journal Title: Phys. Rev. D Volume: 83 Pages: 112003
  • DOI: DOI:10.1103/PhysRevD.83.112003
  • Peer Reviewed
• [Journal Article] The CDF Collaboration, "Measurement of Polarization and Search for CPViolation in B^o_s → φφ Decays" (2011)
  • Author(s): A. Aaltonen, K. Hara, S.H. Kim, Y. Takeuchi, F. Ukegawa, et al.
  • Journal Title: Phys. Rev. Lett. Volume: 107 Pages: 261802
  • DOI: DOI:10.1103/PhysRevLett.107.261802
  • Peer Reviewed
• [Journal Article] The CDF Collaboration, "Observation of Single Top Quark Production and Measurement of |V_<tb>| with CDF" (2010)
  • Author(s): A. Aaltonen, K. Hara, S.H. Kim, Y. Takeuchi, F. Ukegawa, et al.
  • Journal Title: Phys. Rev. Volume: D82 Pages: 112005
  • DOI: DOI:10.1103/PhysRevD.82.112005
  • Peer Reviewed
• [Journal Article] B^o_S中間子の粒子・反粒子振動の観測 (2007)
  • Author(s): 受川史彦, 魚住聖, 金信弘
  • Journal Title: 日本物理学会誌 Volume: 62 Pages: 249
  • URL: http://ci.nii.ac.jp/naid/110006242013
  • Peer Reviewed
• [Journal Article] The CDF Collaboration, "First Observation of Heavy Baryons Σ_b and Σ^*_b (2007)
  • Author(s): A. Aaltonen, K. Hara, S.H. Kim, Y. Takeuchi, F. Ukegawa, et al.
  • Journal Title: Phys. Rev. Lett. Volume: 99 Pages: 202001
  • DOI: DOI:10.1103/PhysRevLett.99.202001
  • Peer Reviewed
• [Journal Article] The CDF Collaboration, "Observation of B^o_s-B^^-^o_s oscillations" (2006)
  • Author(s): A. Abulencia, K. Hara, S.H. Kim, Y. Takeuchi, F. Ukegawa, et al.
  • Journal Title: Phys. Rev. Lett. Volume: 97 Pages: 242003
  • DOI: DOI:10.1103/PhysRevLett.97.242003
  • Peer Reviewed
• [Journal Article] The CDF Collaboration, "Observation of B^o_s→K^+K^- and measurements of branching fractions of charmless two-body decays of B^o and B^o_s mesons in pp^^- collisions at √s=1.96-TeV" (2006)
  • Author(s): A. Abulencia, K. Hara, S.H. Kim, Y. Takeuchi, F. Ukegawa, et al.
  • Journal Title: Phys. Rev. Lett. Volume: 97 Pages: 211802
  • DOI: DOI:10.1103/PhysRevLett.97.211802
  • Peer Reviewed
• [Presentation] CDF実験の30年 (2012)
  • Author(s): 金信弘
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 20120324-27
• [Presentation] Top Quark Properties (2011)
  • Author(s): Yuji Takeuchi
  • Organizer: XXV International Symposium on Lepton Photon Interactions at High Energies
  • Place of Presentation: Tata Institute of Fundamental Research, Mumbai, India
  • Year and Date: 20110822-27
• [Presentation] Standard Model Low mass Higgs search at CDF (2010)
  • Author(s): Yoshikazu Nagai, et al.
  • Organizer: 35th International Conference on High Energy Physics (ICHEP)
  • Place of Presentation: Paris, France
  • Year and Date: 20100722-28
• [Presentation] Resuls on B Physics at CDF (2010)
  • Author(s): Hideki Miyake, et al.
  • Organizer: CERN Joint EP/PP Seminars
  • Place of Presentation: Geneva, Switzerland
  • Year and Date: 2010-04-27
• [Presentation] Recent Results from Tevatron (2009)
  • Author(s): Yuji Takeuchi
  • Organizer: 16th YKIS Conference on Progress in Particle Physics 2008
  • Place of Presentation: Kyoto University, Kyoto, Japan
  • Year and Date: 20090216-19
• [Presentation] Measurement of the Single Top Production Cross Section at CDF (2008)
  • Author(s): Koji Nakamura, et al.
  • Organizer: PHENO 2008 Symposium
  • Place of Presentation: University of Wisconsin-Madison, Wisconsin, USA
  • Year and Date: 20080428-30
• [Presentation] Search for Higgs Boson Production in Association with a W Boson at CDF (2007)
  • Author(s): Tatsuya Masubuchi, et al.
  • Organizer: American Physical Society April Meeting
  • Place of Presentation: Jacksonville, Florida, USA
  • Year and Date: 20070414-17
• [Presentation] B_s oscillations (2006)
  • Author(s): F. Ukegawa
  • Organizer: KEK Physics Seminar
  • Place of Presentation: KEK, Tsukuba
  • Year and Date: 2006-04-24
• [Remarks]
  • URL: http://hep.px.tsukuba.ac.jp/cdfj/