Lattice QCD Study of Hadronic Matrix Elements by Numerical Simulations

强子矩阵元的晶格 QCD 数值模拟研究

• 批准号: 08640404
• 负责人: OKAWA Masanori
• 金额: $ 1.34万
• 依托单位: High Energy Accelerator Research Organization
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08640404/
• 关键词: Lattice QCD; Hadronic matrix elements

Large scale lattice QCD simulations have been made to calculate phenomenologically important hadronic matrix elements such as the K meson bag parameter B_K and the B meson decay constant f_B and f_<BS>, To estimate the values of the matrix elements in the continuum theory, we systematically study the effects of various discretization errors caused by finite lattice spacing. After taking continuum limit, we obtain B_K=0.628(42), f_B=173(4)MeV and f_<BS>=199(3) MeV.Lattice QCD simulations have also been made to calculate quark masses, hadron spectrum, static quark potential and K^+-pi^+pi^0 decay amplitude and to study the nature of the finite temperature chiral phase transition of 2 and 3 flavors QCD.

通过大尺度晶格QCD模拟计算了现象学上重要的强子矩阵元素，如K介子包参数B_K和B介子衰变常数f_B和f_<BS>，为了估计连续介质理论中矩阵元素的值，我们系统地研究了有限晶格间距引起的各种离散化误差的影响。取连续极限后，得到B_K=0.628(42)、f_B=173(4)MeV和f_<BS>=199(3)MeV。还进行了格子QCD模拟，计算了夸克质量、强子能谱、静态夸克势和K^+-pi^+pi^0衰变幅度，并研究了2和3的有限温度手性相变的本质 口味QCD。

项目成果

S.Aoki, R.Burkhalter, S.Ejiri, M.Fukugita, S.Hashimoto, Y.Iwasaki, K.Kanaya, T.Kaneko, Y.Kuramashi, K.Nagai, M.Okawa, H.P.Shanahan, A.Ukawa and T.Yoshie: "Heavy quark physics in N_f=2 QCD" Nuclear Physics B (Proc.Suppl.). (in press.).

S.Aoki、R.Burkhalter、S.Ejiri、M.Fukugita、S.Hashimoto、Y.Iwasaki、K.Kanaya、T.Kaneko、Y.Kuramashi、K.Nagai、M.Okawa、H.P.Shanahan、A.Ukawa

T.Manke, H.P.Shanahan, A.Ali Khan, S.Aoki, R.Burkhalter, S.Ejiri, M.Fukugita, S.Hashimoto, N.Ishizuka, Y.Iwasaki, K.Kanaya, T.Kaneko, Y.Kuramashi, K.Nagai, M.Okawa, A.Ukawa and T.Yoshie: "Hybrid quarkonia on asymmetric lattices" Tsukuba Preprint UTCCP-P-5

T.Manke、H.P.Shanahan、A.Ali Khan、S.Aoki、R.Burkhalter、S.Ejiri、M.Fukugita、S.Hashimoto、N.Ishizuka、Y.Iwasaki、K.Kanaya、T.Kaneko、Y.

S.Aoki: "Kaon B parametn from quenched lattite QCD" Physical Review Letters. 80・24. 5271-5274 (1998)

S. Aoki：“来自淬火拉铁石 QCD 的 Kaon B 参数”物理评论快报 80・24 (1998)。

S.Aoki: "B Meson Decry Constant with the Wilson and clover Heavy Quark Actions" Nuclear Physics B (Proc.Suppl.). 63A-C. 356-358 (1998)

S.Aoki：“威尔逊和三叶草重夸克作用下的 B 介子 Decry 常数”核物理 B（Proc.Suppl.）。

S.Aoki: "Scaling Study of the Two-Flavar Chiral Phase Transition with the Kogut-Susskind Quark Action in Lattice QCD" Physical Review D. 57 (発表予定). (1998)

S. Aoki：“晶格 QCD 中 Kogut-Susskind 夸克作用的双黄手性相变的标度研究”物理评论 D. 57（待提交）。