Break-up and coherent photoproduction of eta mesons on the deuteron

被引：67

作者：

HoffmannRothe, P

Krebeck, M

Hey, J

Breuer, M

Edel, GV

Hourany, E

Rigney, M

Ajaka, J

Anton, G

Arends, J

BerrierRonsin, G

Beulertz, W

Blanpied, G

Bock, A

Didelez, JP

Helbing, K

Maass, R

Noldeke, G

Preedom, B

Richie, B

Rosier, L

Saghai, B

Schumacher, M

Smend, F

机构：

[1] UNIV ERLANGEN NURNBERG,D-91058 ERLANGEN,GERMANY

[2] UNIV GOTTINGEN,ZWEITES PHYS INST,GOTTINGEN,GERMANY

[3] UNIV S CAROLINA,DEPT PHYS,COLUMBIA,SC 29208

[4] ARIZONA STATE UNIV,DEPT PHYS,TEMPE,AZ 85281

[5] CE SACLAY,CEA,DSMDAPNIA,SPHN,F-91191 GIF SUR YVETTE,FRANCE

[6] UNIV BONN,INST PHYS,D-53117 BONN,GERMANY

[7] UNIV MAINZ,INST KERNPHYS,D-55099 MAINZ,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.78.4697

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present new break-up and coherent data for eta meson photoproduction on the deuteron, using a deuterium target and tagged bremsstrahlung photons up to 1 GeV. The differential cross sections for the coherent process were measured from threshold to 800 MeV. They are much smaller than those previously reported. The break-up channel provides a direct measurement of the neutron to proton differential cross section ratios. At the S-11(1535) resonance peak, sigma(n)/sigma(p) = 0.68 +/- 0.06 leading to an isoscalar to isovector amplitude ratio of A(s)/A(v) = 0.096 +/- 0.02.

引用

页码：4697 / 4700

页数：4

共 43 条

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