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arXiv 0907.0254nucl-th
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n p --> d pi^0反应中的电荷对称破缺

Charge Symmetry Breaking in the n p --> d pi^0 reaction

Daniel R. Bolton, Gerald A. Miller

摘要:

用重子手征微扰理论计算了由于电荷对称性破缺引起的n p --> d pi ^0角分布的不对称性。最近的发展,在功率计数已被证明是成功的,在描述总截面,我们把它们的不对称性计算。减少在一个领导秩序图进行了检查。我们比较了更新的理论与实验结果的物理合理的参数范围内,并发现在整个范围内的过度预测。

英文摘要:

The asymmetry in the angular distribution of n p --> d pi^0 due to Charge Symmetry Breaking is calculated using Heavy Baryon Chiral Perturbation Theory. Recent developments in power counting have proven successful in describing total cross sections, and we apply them to the asymmetry calculation. Reducibility in one of the leading order diagrams is examined. We compare the updated theory with experimental results for a range of physically reasonable parameters and find over-prediction for the entire range.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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