Lattice QCD Study of the σ Meson

被引：12

作者：

Fu Zi-Wen ^{[1
]}

机构：

[1] Sichuan Univ, Key Lab Radiat Phys & Technol, Minist Educ, Inst Nucl Sci & Technol, Chengdu 610064, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2011年 / 28卷 / 08期

关键词：

D O I：

10.1088/0256-307X/28/8/081202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the sigma meson in 2+1 flavor full quantum chromodynamics (QCD) with sufficiently light u and d quarks. The point-to-point correlator is measured for the a channel in the "Asqtad" improved staggered fermion formulation. Particular attention is paid to its disconnected diagram and bubble contribution. After chiral extrapolation, we obtain the a mass with 706 +/- 53 MeV, which is close to the observed a meson within error, and is heavier than the pi-pi threshold. The simulations are carried out with MILC 2+1 flavor gauge configurations at lattice spacing of a approximate to 0.15 fm.

引用

页数：4

共 20 条

[1] Insight into the scaler mesons from a lattice calculation [J].

Alford, M ;

Jaffe, RL .

NUCLEAR PHYSICS B, 2000, 578 (1-2) :367-382

[2] Light pseudoscalar decay constants, quark masses, and low energy constants from three-flavor lattice QCD [J].

Aubin, C ;

Bernard, C ;

DeTar, C ;

Osborn, J ;

Gottlieb, S ;

Gregory, EB ;

Toussaint, D ;

Heller, UM ;

Hetrick, JE ;

Sugar, R .

PHYSICAL REVIEW D, 2004, 70 (11) :114501-1

[3] Light hadrons with improved staggered quarks: Approaching the continuum limit [J].

Aubin, C ;

Bernard, C ;

DeTar, C ;

Osborn, J ;

Gottlieb, S ;

Gregory, EB ;

Toussaint, D ;

Heller, UM ;

Hetrick, JE ;

Sugar, R .

PHYSICAL REVIEW D, 2004, 70 (09)

[4] Nonperturbative QCD simulations with 2+1 flavors of improved staggered quarks [J].

Bazavov, A. ;

Toussaint, D. ;

Bernard, C. ;

Laiho, J. ;

DeTar, C. ;

Levkova, L. ;

Oktay, M. B. ;

Gottlieb, Steven ;

Heller, U. M. ;

Hetrick, J. E. ;

Mackenzie, P. B. ;

Sugar, R. ;

Van de Water, R. S. .

REVIEWS OF MODERN PHYSICS, 2010, 82 (02) :1349-1417

[5] Scalar meson spectroscopy with lattice staggered fermions [J].

Bernard, Claude ;

DeTar, Carleton ;

Fu, Ziwen ;

Prelovsek, Sasa .

PHYSICAL REVIEW D, 2007, 76 (09)

[6] Mass and width of the lowest resonance in QCD [J].

Caprini, I ;

Colangelo, G ;

Leutwyler, H .

PHYSICAL REVIEW LETTERS, 2006, 96 (13)

[7] MEASURING THE HADRONIC SPECTRUM OF THE QUARK PLASMA [J].

DETAR, C ;

KOGUT, JB .

PHYSICAL REVIEW D, 1987, 36 (09) :2828-2839

[8]

FU ZW, 2011, CHIN PHYS C IN PRESS, P10205

[9]

FU ZW, 2006, ARXIV11031541HEPLAT, P10205

[10] Another look at ππ scattering in the scalar channel -: art. no. 034005 [J].

Igi, K ;

Hikasa, K .

PHYSICAL REVIEW D, 1999, 59 (03)

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