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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; Chen Y(陈莹)
2005
发表期刊PHYSICS LETTERS B
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.
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.
文章类型Article
学科领域Physics
DOI10.1016/j.physletb.2005.04.076
收录类别SCI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000229808400007
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被引频次:38[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225738
专题理论物理室
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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!.
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