The negativity of the overlap-based topological charge density correlator in pure-glue QCD and the non-integrable nature of its contact part

	The negativity of the overlap-based topological charge density correlator in pure-glue QCD and the non-integrable nature of its contact part
	Horvath, I; Alexandru, A; Zhang, JB; Chen, Y; Dong, SJ; Draper, T; Liu, KF; Mathur, N; Tamhankar, S; Thacker, HB
刊名	PHYSICS LETTERS B
	2005
卷号	617 期号:1-2 页码:#REF!
通讯作者	Horvath, I (reprint author), Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
英文摘要	We calculate the lattice two-point function of topological charge density in pure-glue QCD using the discretization of the operator based on the overlap Dirac matrix. Utilizing data at three lattice spacings it is shown that the continuum limit of the correlator complies with the requirement of non-positivity at non-zero distances. For our choice of the overlap operator and the Iwasaki gauge action we find that the size of the positive core is approximate to 2a (with a being the lattice spacing) sufficiently close to the continuum limit. This result confirms that the overlap-based topological charge density is a valid local operator over realistic backgrounds contributing to the QCD path integral, and is important for the consistency of recent results indicating the existence of a low-dimensional global brane-like topological structure in the QCD vacuum. We also confirm the divergent short-distance behavior of the correlator, and the non-integrable nature of the associated contact part. (c) 2005 Elsevier B.V. All rights reserved.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
WOS记录号	WOS:000229808400007
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225738]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	Horvath, I,Alexandru, A,Zhang, JB,et al. The negativity of the overlap-based topological charge density correlator in pure-glue QCD and the non-integrable nature of its contact part[J]. PHYSICS LETTERS B,2005,617(1-2):#REF!.
APA	Horvath, I.,Alexandru, A.,Zhang, JB.,Chen, Y.,Dong, SJ.,...&陈莹.(2005).The negativity of the overlap-based topological charge density correlator in pure-glue QCD and the non-integrable nature of its contact part.PHYSICS LETTERS B,617(1-2),#REF!.
MLA	Horvath, I,et al."The negativity of the overlap-based topological charge density correlator in pure-glue QCD and the non-integrable nature of its contact part".PHYSICS LETTERS B 617.1-2(2005):#REF!.