Has charge symmetry breaking been observed in the dd→απ0 reaction?

被引：9

作者：

Dobrokhotov, D

Fäldt, G

Gårdestig, A

Wilkin, C

机构：

[1] PN Lebedev Phys Inst, Moscow 117924, Russia

[2] Uppsala Univ, Div Nucl Phys, S-75121 Uppsala, Sweden

[3] UCL, London WC1E 6BT, England

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.83.5246

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Estimates are made of the dd --> alpha gamma gamma production cross sections in a model where each neutron-proton pair in the beam and target initiates an np --> d gamma reaction. This approach, which successfully reproduces observables in two-pion production at intermediate energies, suggests that direct two-photon production could provide a very significant background to the measurement of the charge-symmetry-breaking (CSB) reaction dd --> alpha pi(0). A nonvanishing CSB cross section has been reported which might be confused with such two-photon production under the given experimental conditions.

引用

页码：5246 / 5249

页数：4

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