ITP OpenIR  > 理论物理所2015年知识产出
Meson mass decomposition from lattice QCD
Yang, YB; Chen, Y; Draper, T; Gong, M; Liu, KF; Liu, ZF; Ma, JP; Yang, YB (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
2015
发表期刊PHYSICAL REVIEW D
卷号91期号:7页码:74516
文章类型Article
摘要Hadron masses can be decomposed as a sum of quark and glue components that are defined through hadronic matrix elements of QCD operators. The components consist of the quark mass term, the quark energy term, the glue energy term, and the trace anomaly term. We calculate these components for mesons with lattice QCD for the first time. The calculation is carried out with overlap fermion on 2 + 1 flavor domain-wall fermion gauge configurations. We confirm that similar to 50% of the light pion mass comes from the quark mass term and similar to 10% comes from the quark energy; whereas, for the rho meson, the quark energy contributes roughly half of its mass but the quark mass term contributes little. The combined glue components contribute similar to 40-50% for both mesons. It is interesting to observe that the quark mass contribution to the mass of the vector meson is almost linear in quark mass over a large quark mass region below the charm quark mass. For heavy mesons, the quark mass term dominates the masses, while the contribution from the glue components is about 200 MeV (a bare value around 2 GeV) for the heavy pseudoscalar and vector mesons. The charmonium hyperfine splitting is found to be dominated by the quark energy term which is consistent with the picture of the quark potential model.
学科领域Astronomy & Astrophysics ; Physics
资助者National Science Foundation of China (NSFC) [11075167, 11105153, 11335001] ; National Science Foundation of China (NSFC) [11075167, 11105153, 11335001] ; U.S. DOE Award [DE-FG05-84ER40154] ; U.S. DOE Award [DE-FG05-84ER40154] ; NSFC ; NSFC ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG) ; Youth Innovation Promotion Association of Chinese Academy of Sciences [2015013, 2011013] ; Youth Innovation Promotion Association of Chinese Academy of Sciences [2015013, 2011013] ; National Science Foundation of China (NSFC) [11075167, 11105153, 11335001] ; National Science Foundation of China (NSFC) [11075167, 11105153, 11335001] ; U.S. DOE Award [DE-FG05-84ER40154] ; U.S. DOE Award [DE-FG05-84ER40154] ; NSFC ; NSFC ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG) ; Youth Innovation Promotion Association of Chinese Academy of Sciences [2015013, 2011013] ; Youth Innovation Promotion Association of Chinese Academy of Sciences [2015013, 2011013]
DOIhttp://dx.doi.org/10.1103/PhysRevD.91.074516
关键词[WOS]ENERGY-MOMENTUM TENSOR ; NUCLEON
收录类别SCI
语种英语
资助者National Science Foundation of China (NSFC) [11075167, 11105153, 11335001] ; National Science Foundation of China (NSFC) [11075167, 11105153, 11335001] ; U.S. DOE Award [DE-FG05-84ER40154] ; U.S. DOE Award [DE-FG05-84ER40154] ; NSFC ; NSFC ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG) ; Youth Innovation Promotion Association of Chinese Academy of Sciences [2015013, 2011013] ; Youth Innovation Promotion Association of Chinese Academy of Sciences [2015013, 2011013] ; National Science Foundation of China (NSFC) [11075167, 11105153, 11335001] ; National Science Foundation of China (NSFC) [11075167, 11105153, 11335001] ; U.S. DOE Award [DE-FG05-84ER40154] ; U.S. DOE Award [DE-FG05-84ER40154] ; NSFC ; NSFC ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG) ; Youth Innovation Promotion Association of Chinese Academy of Sciences [2015013, 2011013] ; Youth Innovation Promotion Association of Chinese Academy of Sciences [2015013, 2011013]
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
引用统计
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/21020
专题理论物理所2015年知识产出
通讯作者Yang, YB (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
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Yang, YB,Chen, Y,Draper, T,et al. Meson mass decomposition from lattice QCD[J]. PHYSICAL REVIEW D,2015,91(7):74516.
APA Yang, YB.,Chen, Y.,Draper, T.,Gong, M.,Liu, KF.,...&Yang, YB .(2015).Meson mass decomposition from lattice QCD.PHYSICAL REVIEW D,91(7),74516.
MLA Yang, YB,et al."Meson mass decomposition from lattice QCD".PHYSICAL REVIEW D 91.7(2015):74516.
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