Search for new physics from tau lepton at Belle experiment

• Project/Area Number: 21740178
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Nagoya University
• Principal Investigator: MIYAZAKI Yoshiyuki Nagoya University, 理学研究科, 特任助教 (50377959)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: タウレプトン / Belle実験

Research Abstract

Lepton flavor violation (LFV) in charged lepton decays is forbidden in the Standard Model while many extension of SM predict LFV with branching fraction as high as 10^<-8>. We search for various lepton-flavor-violating tau decays using a large data sample accumulated with the Belle detector at KEKB collider. We obtain 90% confidence level upper limits on the branching fractions in order of 10^<-8>.

Research Products

• [Journal Article] Search for Lepton-Flavor-Violating τDecays into a Lepton and a Vector Meson (2011)
  • Author(s): Y.Miyazaki, et. al.(Belle collaboration)(143人中、1番目)
  • Journal Title: Phys.Lett. B699 Pages: 251-259
  • Peer Reviewed
• [Journal Article] Search for Lepton-Flavor-Violating tau Decays into a Lepton and a Vector Meson (2011)
  • Author(s): Y.Miyazaki, the Belle Collaboration
  • Journal Title: Physics Letter Volume: (印刷中)
  • Peer Reviewed
• [Journal Article] Search for Lepton Flavor Violating tau Decays at B-factories (2010)
  • Author(s): Y.Miyazaki
  • Journal Title: PoS FPCP2011 Pages: 47-47
• [Journal Article] Updated Search for Lepton Flavor Violating tau Decays into Three Leptons with 710 Million Produced τ+τ- Paris (2010)
  • Author(s): K.Hayasaka, K.Inami, Y.Miyazaki, et al.(Belle collaboration)(135人中、3番目)
  • Journal Title: Phys.Lett. B687 Pages: 139-139
  • Peer Reviewed
• [Journal Article] Search for Lepton Flavor Violating τ Decays into lK^0s and lK^0sK^0s (2010)
  • Author(s): Y.Miyazaki, et al.(Belle collaboration)(131人中、1番目)
  • Journal Title: Phys.Lett. B692 Pages: 4-4
  • Peer Reviewed
• [Journal Article] Search for Lepton Flavor Violating tau Decays into 1K^0s and 1K^0sK^0s (2010)
  • Author(s): Y.Miyazaki, the Belle Collaboration
  • Journal Title: Physics Letter Volume: B672 Pages: 4-9
  • Peer Reviewed
• [Journal Article] Lepton Flavor Violation at B-factories (2010)
  • Author(s): Y.Miyazaki
  • Journal Title: PoS Volume: FPCP2010 Pages: 47-47
• [Journal Article] Search for Lepton Flavor and Lepton Number Violating tau Decays into a Lepton and Two Charged Mosons (2010)
  • Author(s): Y.Miyazaki, the Belle Collaboration
  • Journal Title: Physics Letter B 682 Pages: 355-362
  • Peer Reviewed
• [Journal Article] Search for Lepton Flavor Violating tau Decays into Three Leptons at 729 Millions Produced τ+τ- Pairs (2010)
  • Author(s): Y.Miyazaki, the Belle Collaboration
  • Journal Title: Physics Letter B B687 Pages: 139-143
  • Peer Reviewed
• [Journal Article] Search for Lepton Flavor Violatio at B-factories (2009)
  • Author(s): Y.Miyazaki
  • Journal Title: PoS HEP-EPS2009 Pages: 263-263
• [Journal Article] Search for Lepton Flavor Violating τ Decays into one Lepton and Two Charged Mesons (2009)
  • Author(s): Y.Miyazaki, et al.(Belle collaboration)(130人中、1番目)
  • Journal Title: Phys.Lett. B682 Pages: 355-355
  • Peer Reviewed
• [Presentation] Belle実験におけるタウレプトンからレプトンフレーバーを破る崩壊τ→lhh'の探索 (2011)
  • Author(s): 宮崎由之
  • Organizer: 日本物理学会2010年次大会
  • Place of Presentation: 新潟大学
• [Presentation] Belle実験におけるタウレプトンからレプトンフレーバーを破る崩壊τ→1hh'の探索 (2011)
  • Author(s): 宮崎由之
  • Organizer: 日本物理学会 2011年次会
  • Place of Presentation: 新潟大学
• [Presentation] Belle実験におけるタウレプトンからレプトンフレーバーを破る崩壊の探索 (2010)
  • Author(s): 宮崎由之
  • Organizer: 日本物理学会2010秋期大会
  • Place of Presentation: 九州工業大学
• [Presentation] Lepton Flavor Violation at B Factories (2010)
  • Author(s): Y.Miyazaki
  • Organizer: Flavor Physics and CV Violation 2010
  • Place of Presentation: Torino, Italy
• [Presentation] Lepton Flavor Violation at B-factories (2010)
  • Author(s): Y.Miyazaki
  • Organizer: Flavor Physics and CP-Violation 2010 (FPCP2010)
  • Place of Presentation: Italy, Torino
• [Presentation] Belle実験におけるタウレプトンからレプトンフレーバーを破る崩壊の探索 (2010)
  • Author(s): 宮崎由之
  • Organizer: 日本物理学会 2010秋期大会
  • Place of Presentation: 九州工業大学
• [Presentation] Belle実験におけるレプトンフレーバーを破るタウレプトン崩壊τ→lK0s, lK0sK0sの探索 (2009)
  • Author(s): 宮崎由之
  • Organizer: 日本物理学会2009秋期大会
  • Place of Presentation: 甲南大学
• [Presentation] Search for Lepton Flavor Violation in τ Decays at Belle Experiment (2009)
  • Author(s): Y.Miyazaki
  • Organizer: 2009 Europhysics Conference on High Energy Physics : HEP 2009 (EPS-HEP 2009)
  • Place of Presentation: Krakow, Poland
• [Presentation] Search for Lepton Flavor Violating tau Decays at Belle Experiment (2009)
  • Author(s): Y.Miyazaki
  • Organizer: The 2009 Europhysics Conference on High Energy Physics(EPS HEP 2009)
  • Place of Presentation: ポーランド、クラコフ
• [Presentation] Belle実験におけるレプトンフレーバーを破るタウレプトン崩壊τ→1K^0s,1K^0sK^0sの探索 (2009)
  • Author(s): 宮崎由之
  • Organizer: 日本物理学会 2009秋期大会
  • Place of Presentation: 甲南大学
• [Remarks] ホームページ等