Hyperon Structure from Nf=2+1 Lattice QCD

被引：1

作者：

Horsley, Roger ^{[1
]}

Nakamura, Yoshifumi ^{[2
]}

Pleiter, Dirk ^{[3
]}

Rakow, Paul E. L. ^{[4
]}

Schierholz, Gerrit ^{[5
]}

Stueben, Hinnerk ^{[6
]}

Winter, F. ^{[1
]}

Zanotti, James M. ^{[1
]}

机构：

[1] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Tsukuba, Ctr Comp Sci, Tsukuba, Ibaraki 3058577, Japan

[3] DESY, D-15738 Zeuthen, Germany

[4] Univ Liverpool, Dept Math Sci, Div Phys Theor, Liverpool L69 3BX, Merseyside, England

[5] DESY, D-22603 Hamburg, Germany

[6] Konrad Zuse Zentrum Informationstech Berlin, D-14195 Berlin, Germany

来源：

T(R)OPICAL QCD 2010 | 2011年 / 1354卷

关键词：

Lattice QCD; Form Factors; Parton Distribution Functions;

D O I：

10.1063/1.3587593

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

We present results from the QCDSF/UKQCD collaboration for the electromagnetic form factors, axial charges and momentum fractions for the hyperons. The simulations are performed on our new ensembles generated with 2+ 1 flavours of dynamical O(a) -improved Wilson fermions. A unique feature of these configurations is that the quark masses are tuned so that the singlet quark mass is held fixed at its physical value. We use 5 such choices of the individual quark masses on 24(3) x 48 lattices with a lattice spacing of about 0.078 fm.

引用

页数：6

共 15 条

[1] Tuning the strange quark mass in lattice simulations [J].

Bietenholz, W. ;

Bornyakov, V. ;

Cundy, N. ;

Goeckeler, M. ;

Horsley, R. ;

Kennedy, A. D. ;

Lockhart, W. G. ;

Nakamura, Y. ;

Perlt, H. ;

Pleiter, D. ;

Rakow, P. E. L. ;

Schaefer, A. ;

Schierholz, G. ;

Schiller, A. ;

Stueben, H. ;

Zanotti, J. M. .

PHYSICS LETTERS B, 2010, 690 (04) :436-441

[2] Precision electromagnetic structure of octet baryons in the chiral regime [J].

Boinepalli, S. ;

Leinweber, D. B. ;

Williams, A. G. ;

Zanotti, J. M. ;

Zhang, J. B. .

PHYSICAL REVIEW D, 2006, 74 (09)

[3] The BAGEL assembler generation library [J].

Boyle, Peter A. .

COMPUTER PHYSICS COMMUNICATIONS, 2009, 180 (12) :2739-2748

[4] Nonperturbative improvement of stout-smeared three-flavor clover fermions [J].

Cundy, N. ;

Goeckeler, M. ;

Horsley, R. ;

Kaltenbrunner, T. ;

Kennedy, A. D. ;

Nakamura, Y. ;

Perlt, H. ;

Pleiter, D. ;

Rakow, P. E. L. ;

Schaefer, A. ;

Schierholz, G. ;

Schiller, A. ;

Stueben, H. ;

Zanotti, J. M. .

PHYSICAL REVIEW D, 2009, 79 (09)

[5] Baryon magnetic moments and axial coupling constants with relativistic and exchange current effects [J].

Dannbom, K ;

Glozman, LY ;

Helminen, C ;

Riska, DO .

NUCLEAR PHYSICS A, 1997, 616 (3-4) :555-574

[6] The Chroma software system for lattice QCD [J].

Edwards, RG ;

Joó, B .

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2005, 140 :832-834

[7] Axial charges of octet baryons in two-flavor lattice QCD [J].

Erkol, Gueray ;

Oka, Makoto ;

Takahashi, Toru T. .

PHYSICS LETTERS B, 2010, 686 (01) :36-40

[8] HYPERON BETA-DECAYS [J].

GAILLARD, JM ;

SAUVAGE, G .

ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE, 1984, 34 :351-402

[9] Hadron structure from lattice quantum chromodynamics [J].

Haegler, Ph .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2010, 490 (3-5) :49-175

[10]

Horsley R., 2010, ARXIV10120215

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