Precision test of the Standard Model by fine lattice calculations

2017 Fiscal Year Final Research Report

• Project/Area Number: 26247043
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: Hashimoto Shoji 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (90280510)
• Co-Investigator(Kenkyū-buntansha): 深谷 英則 大阪大学, 理学研究科, 助教 (70435676)
• Co-Investigator(Renkei-kenkyūsha): KANEKO Takashi 高エネルギー加速器研究機構, 素粒子原子核研究所, 研究機関講師 (20342602)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 格子QCD / B中間子 / チャームクォーク

Outline of Final Research Achievements

We performed large scale simulation of quantum chromodynamics (QCD) employing a chirally symmetric fermion formulation on the lattice with applications to the calculation of B and D meson decay form factors in mind. In order to control the discretization effects that could be significant for heavy quarks, we take fine lattice spacings between 0.044 fm and 0.083 fm. We generated and accumulated the lattice data describing the vacuum of QCD at various light quark masses. Utilizing these generated data, we calculated various physical quantities including a precise determination of charm quark mass, a comparison of short-distance current correlation functions with experimental data, as well as a calculation of D meson semi-leptonic decay form factors.

Free Research Field

素粒子物理学