Neutral pion photoproduction on deuterium in baryon chiral perturbation theory to order q(4)

被引：68

作者：

Beane, SR

Bernard, V

Lee, TSH

Meissner, UG

van Kolck, U

机构：

[1] UNIV MARYLAND, DEPT PHYS, COLLEGE PK, MD 20742 USA

[2] UNIV STRASBOURG 1, PHYS THEOR LAB, F-67037 STRASBOURG 2, FRANCE

[3] ARGONNE NATL LAB, DIV PHYS, ARGONNE, IL 60439 USA

[4] FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST KERNPHYS, D-52425 JULICH, GERMANY

[5] UNIV WASHINGTON, DEPT PHYS, SEATTLE, WA 98195 USA

来源：

NUCLEAR PHYSICS A | 1997年 / 618卷 / 04期

关键词：

D O I：

10.1016/S0375-9474(97)00133-4

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Threshold neutral pion photoproduction on the deuteron is studied in the framework of baryon chiral perturbation theory beyond next-to-leading order in the chiral expansion. To fourth order in small momenta, the amplitude is finite and a sum of two- and three-body interactions with no undetermined parameters. With accurate theoretical and experimental input from the single nucleon sector for the proton amplitude, we investigate the sensitivity of the threshold cross section to the elementary gamma n --> pi(0)n amplitude. A precise measurement of the threshold cross section for gamma d --> pi(0)d is called for. (C) 1997 Elsevier Science B.V.

引用

页码：381 / 401

页数：21

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