Glueball spectrum from N-f=2 lattice QCD study on anisotropic lattices

doi:10.1088/1674-1137/42/9/093103

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	Glueball spectrum from N-f=2 lattice QCD study on anisotropic lattices
	Sun, W 2; Chen, Y 2; Gong, M 2; Liu, C6,7,8 ; Liu, YB ; Liu, ZF ; Ma, JP; Zhang, JB ; Gui, LC
刊名	CHINESE PHYSICS C
	2018
卷号	42 期号:9 页码:93103
关键词	BOUND-STATES GLUONS U(1)
ISSN号	1674-1137
DOI	10.1088/1674-1137/42/9/093103
英文摘要	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.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/22844]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China 4.Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China 5.Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China 6.Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China 7.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 8.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China 9.Peking Univ, Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China 10.Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
推荐引用方式 GB/T 7714	Sun, W,Chen, Y,Gong, M,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.,Chen, Y.,Gong, M.,Liu, C.,Liu, YB.,...&Gui, LC.(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.