The pion form factor from lattice QCD with two dynamical flavours

被引：89

作者：

Broemmel, D. ^{[1
]}

Diehl, M.

Goeckeler, M.

Haegler, P.

Horsley, R.

Nakamura, Y.

Pleiter, D.

Rakow, P. E. L.

Schaefer, A.

Schierholz, G.

Stueben, H.

Zanotti, J. M.

机构：

[1] DESY, Theory Grp, D-22603 Hamburg, Germany

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[3] Tech Univ Munich, Inst Theoret Phys, Dept Phys, D-85747 Garching, Germany

[4] Univ Edinburgh, Sch Phys, Edinburgh EH9 3JH, Midlothian, Scotland

[5] DESY, John von Neumann Inst Comp, D-15738 Zeuthen, Germany

[6] Univ Liverpool, Dept Math Sci, Div Theoret Phys, Liverpool L69 3BX, Merseyside, England

[7] Konrad Zuse Inst Informat Tech ZIB, D-14195 Berlin, Germany

来源：

EUROPEAN PHYSICAL JOURNAL C | 2007年 / 51卷 / 02期

关键词：

D O I：

10.1140/epjc/s10052-007-0295-6

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 compute the electromagnetic form factor of the pion, using non-perturbatively O(a) improved Wilson fermions. The calculations are done for a wide range of pion masses and lattice spacings. We check for. finite size effects by repeating some of the measurements on smaller lattices. The large number of lattice parameters we use allows us to extrapolate to the physical point. For the square of the charge radius we find < r(2)> = 0.444( 20) fm(2), in good agreement with experiment.

引用

页码：335 / 345

页数：11

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