Calculation of transition matrix elements of double-beta decay using Skyrme-QRPA

• Project/Area Number: 23840005
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: University of Tsukuba
• Principal Investigator: TERASAKI Jun 筑波大学, 数理物質系, 准教授 (50616430)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 原子核 / 理論 / ニュートリノ / ニュートリノレス二重ベータ崩壊 / QRPA / HFB / 二重ベータ崩壊

Research Abstract

We developed a system of programs to calculate transition matrix elements of the neutrinoless double-beta decay for determining the neutrino mass. Calculations have been performed of the ground and excited states necessary around a mass-150 region. The most siginificant achievement is that the overlap of the intermediate states obtained can now be calculated almost exactly. This achievement was enabled by the most advanced computers and has an effect to make the application of the random-phase approximation to the neutrinoless double beta decay more acccurate than before.

Research Products

• [Journal Article] Overlap of quasiparticle random-phase approximation states based on ground states of different nuclei: Mathematical properties and test calculations (2013)
  • Author(s): J. Terasaki
  • Journal Title: Phys. Rev. C Volume: 87 Issue: 2
  • DOI: 10.1103/physrevc.87.024316
  • NAID: 120007137052
  • Peer Reviewed
• [Journal Article] Overlap of QRPA states based on ground states of different nuclei (2013)
  • Author(s): J. Terasaki
  • Journal Title: Acta Physica Polonica B Volume: 44 Issue: 3 Pages: 259-262
  • DOI: 10.5506/aphyspolb.44.259
  • NAID: 120007136982
  • Peer Reviewed
• [Journal Article] Overlap of quasiparticle random-phase approximation states for nuclear matrix elements of the neutrino-less double-β decay (2012)
  • Author(s): J. Terasaki
  • Journal Title: Phys. Rev. C Volume: 86 Issue: 2
  • DOI: 10.1103/physrevc.86.021301
  • NAID: 120007137258
  • Peer Reviewed
• [Presentation] ニュートリノレス二重ベータ崩壊の原子核行列要素のためのQRPA状態の重複計算 (2013)
  • Author(s): 寺崎順
  • Organizer: 日本物理学会 第68回年次大会
  • Place of Presentation: 東広島
• [Presentation] ニュートリノレス二重ベータ崩壊の原子核行列要素のためのQRPA状態の重複計算 (2013)
  • Author(s): 寺崎順
  • Organizer: 日本物理学会
  • Place of Presentation: 広島大学、東広島
• [Presentation] Overlap of QRPA states based on ground states of different nucleiXLVII Zakopane Conference on Nuclear Physics (2012)
  • Author(s): J. Terasaki
  • Organizer: Extremes of the Nuclear Landscape
  • Place of Presentation: Zakopane, Poland
• [Presentation] 原子核応答の大規模計算 (2011)
  • Author(s): 寺崎順
  • Organizer: 日本物理学会
  • Place of Presentation: 弘前大学(招待講演)
  • Year and Date: 2011-09-18