Compton scattering from the proton at fourth order in the chiral expansion.

Compton scattering from the proton at fourth order in the chiral expansion.
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手性展开式中质子的康普顿散射四阶。

DOI:
10.1103/physrevc.63.064608
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发表时间:
2001
期刊:
影响因子:
3.1
通讯作者:
J. McGovern
J. McGovern
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
J. McGovern

文献摘要

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我们使用重重子手性微扰理论中计算出的四阶振幅,提出了质子康普顿散射微分截面的计算。我们与高达 200 MeV 的可用数据进行比较。我们发现,在整个能量范围内,低于 90 度的角度的一致性是可以接受的,但在更向后的角度,一致性会降低到约 100 MeV 以上,并且在光产生阈值之上完全失败。
We present calculations of differential cross sections for Compton scattering from the proton, using amplitudes calculated to fourth order in heavy baryon chiral perturbation theory. We compare with available data up to 200 MeV. We find that the agreement for angles below 90 degree is acceptable over the whole energy range, but that at more backward angles the agreement decreases above about 100 MeV, and fails completely above the photoproduction threshold.