Glueballs and topology with O(a)-improved lattice QCD

被引：5

作者：

Hart, A ^{[1
]}

机构：

[1] Univ Cambridge, DAMTP, Cambridge CB3 0WA, England

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2002年 / 106卷

关键词：

D O I：

10.1016/S0920-5632(01)01782-0

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We present evidence for unquenching effects in N-f = 2, 16(3)32 ensembles by comparing with `equivalent' quenched data at (r) over cap (0) similar or equal to 5.0. A (small) VEV for torelons signals (weak) string breaking. A 15 - 20% reduction in the scalar glueball mass relative to quenched is argued to be (in part at least) a discretisation effect. We find a chiral suppression of the topological susceptibility consistent with expectations, and agreement between fermionic and gluonic methods for measuring the topological charge.

引用

页码：575 / 577

页数：3

共 16 条

[1] Scanning the topological sectors of the QCD vacuum with the hybrid Monte Carlo algorithm [J].

Alles, B ;

Bali, C ;

D'Elia, M ;

Di Giacomo, A ;

Eicker, N ;

Schilling, K ;

Spitz, A ;

Gusken, S ;

Hoeber, H ;

Lippert, T ;

Struckmann, T ;

Ueberholz, P ;

Viehoff, J .

PHYSICAL REVIEW D, 1998, 58 (07)

[2]

ALLTON CR, HEPLAT0107021

[3]

Bali GS, 2000, PHYS REV D, V62, DOI 10.1103/PhysRevD.62.054503

[4]

CLOSE FE, HEPPH0103173

[5] Topology of the SU(2) vacuum: A lattice study using improved cooling [J].

deForcrand, P ;

Perez, MG ;

Stamatescu, IO .

NUCLEAR PHYSICS B, 1997, 499 (1-2) :409-449

[6] Revealing topological structure in the SU(2) vacuum [J].

DeGrand, T ;

Hasenfratz, A ;

Kovacs, TG .

NUCLEAR PHYSICS B, 1998, 520 (1-2) :301-322

[7] CHIRAL DYNAMICS IN THE LARGE N LIMIT [J].

DIVECCHIA, P ;

VENEZIANO, G .

NUCLEAR PHYSICS B, 1980, 171 (03) :253-272

[8]

Hart A, 2000, NUCL PHYS B-PROC SUP, V83-4, P476

[9]

HART A, HEPLAT0108006

[10]

HART A, DAMTP200175

← 1 2 →