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Sun, W1; Gui, LC; Chen, Y1; Gong, M1; Liu, C5,6,7; Liu, YB; Liu, ZF; Ma, JP; Zhang, JB
Glueball spectrum from N-f=2 lattice QCD study on anisotropic lattices
发表期刊CHINESE PHYSICS C
语种英语
关键词BOUND-STATES GLUONS U(1)
摘要The lowest-lying glueballs are investigated in lattice QCD using N-f = 2 clover Wilson fermions on anisotropic lattices. We simulate at two different and relatively heavy quark masses, corresponding to physical pion masses of m(pi) similar to 938 MeV and 650 MeV. The quark mass dependence of the glueball masses has not been investigated in the present study. Only the gluonic operators built from Wilson loops are utilized in calculating the corresponding correlation functions. In the tensor channel, we obtain the ground state mass to be 2.363(39) GeV and 2.384(67) GeV at m(pi) similar to 938 MeV and 650 MeV, respectively. In the pseudoscalar channel, when using the gluonic operator whose continuum limit has the form of c(ijk)TrB(i)D(j)B(k), we obtain the ground state mass to be 2.573(55) GeV and 2.585(65) GeV at the two pion masses. These results are compatible with the corresponding results in the quenched approximation. In contrast, if we use the topological charge density as field operators for the pseudoscalar, the masses of the lowest state are much lighter (around 1 GeV) and compatible with the expected masses of the flavor singlet q (q) over bar meson. This indicates that the operator c(ijk)TrB(i)D(j)B(k) and the topological charge density couple rather differently to the glueball states and q (q) over bar mesons. The observation of the light flavor singlet pseudoscalar meson can be viewed as the manifestation of effects of dynamical quarks. In the scalar channel, the ground state masses extracted from the correlation functions of gluonic operators are determined to be around 1.4-1.5 GeV, which is close to the ground state masses from the correlation functions of the quark bilinear operators. In all cases, the mixing between glueballs and conventional mesons remains to be further clarified in the future.
2018
ISSN1674-1137
卷号42期号:9页码:93103
学科领域Physics
学科门类Physics, Nuclear ; Physics, Particles & Fields
DOI10.1088/1674-1137/42/9/093103
收录类别SCIE
引用统计
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/22844
专题理论物理所科研产出_SCI论文
作者单位1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China
3.Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China
4.Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China
5.Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China
6.Peking Univ, Sch Phys, Beijing 100871, Peoples R China
7.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
8.Peking Univ, Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
9.Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
10.Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
11.Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China
推荐引用方式
GB/T 7714
Sun, W,Gui, LC,Chen, Y,et al. Glueball spectrum from N-f=2 lattice QCD study on anisotropic lattices[J]. CHINESE PHYSICS C,2018,42(9):93103.
APA Sun, W.,Gui, LC.,Chen, Y.,Gong, M.,Liu, C.,...&Zhang, JB.(2018).Glueball spectrum from N-f=2 lattice QCD study on anisotropic lattices.CHINESE PHYSICS C,42(9),93103.
MLA Sun, W,et al."Glueball spectrum from N-f=2 lattice QCD study on anisotropic lattices".CHINESE PHYSICS C 42.9(2018):93103.
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