Exotic hadron-nuclear systems with heavy flavors in lattice QCD

2014 Fiscal Year Final Research Report

• Project/Area Number: 23540284
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Tohoku University (2012-2014); The University of Tokyo (2011)
• Principal Investigator: SASAKI Shoichi 東北大学, 理学(系)研究科(研究院), 准教授 (60332590)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: 量子色力学 / 格子ゲージ理論 / ハドロン理論 / エキゾチックハドロン / チャーモニウム / ボトモニウム

Outline of Final Research Achievements

I would like to examin what is the nature of the newly discovered exotic mesons that include heavy flavors on the basis of the fundamental theory of the strong interaction, Quantum ChromoDynamics (QCD). I then utilize lattice QCD simulations, which have been progressing with steadily increasing accuracy, to study 1) the structure of the traditional quarkonium states and 2) the possibility of narrow resonance formation near the threshold. In the former case, an application of the Bethe-Salpeter amplitude method for heavy quarkonium systems is successfully demonstrated. This approach can provide new and valuable informations. As for the latter case, I develop the Luscher finite size approach under the partially twisted boundary condition and then demonstrate the feasibility of a new approach to examine the existence of near-threshold and narrow resonance states through a study of the Y(4140) resonance in dynamical lattice QCD simulations at almost physical point.

Free Research Field

ハドロン物理