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arXiv 1004.0707nucl-exhep-ex
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对"通过Primakoff截面测量eta-> gamma gamma衰变宽度"一文的评论

Comments on "eta -> gamma gamma Decay Width via the Primakoff Cross Section"

L. Gan, A. Gasparian, S. Gevorkyan, R. Miskimen

摘要:

在Rodrigues等人[1]最近的一篇文章中,Browman等人[2]在1974年获得的eta光核数据被重新拟合,作为提取eta-> gamma gamma衰变宽度的方法。在作者的分析中,关键的论断是将eta角分布的背景仅归因于核非相干产生。我们不同意这种说法,并质疑[1]中使用的拟合过程的有效性。对Cornell Primakoff数据的重新分析需要对数据中的强子背景和偶然背景有详细的了解,而[1]的作者还没有完成这一任务。[1]t. e. Rodrigues等人,物理学评论快报,101,012301(2008)中所述。[2]a. Browman等人,物理修订版信函32,1067(1974)中所述。

英文摘要:

In a recent article by Rodrigues et al. [1] eta photo-nuclear data taken by Browman et al. [2] in 1974 were refit as a means to extract the eta->gamma gamma decay width. The key assertion in the author's analysis is attributing backgrounds in the eta angular distribution to nuclear incoherent production only. We disagree with this assertion and question the validity of the fitting procedure utilized in [1]. A reanalysis of the Cornell Primakoff data requires a detailed understanding of the hadronic and accidental backgrounds in the data, and the authors of [1] have not accomplished this task. [1] T. E. Rodrigues et al., Phys. Rev. Lett., 101, 012301 (2008). [2] A. Browman et al., Phys. Rev. Lett. 32, 1067 (1974).

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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