Proton Compton Scattering from Linearly Polarized Gamma Rays
Proton Compton Scattering from Linearly Polarized Gamma Rays
复制标题
线性偏振伽马射线的质子康普顿散射
DOI：
10.1103/physrevlett.128.132502
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发表时间：
2022
影响因子：
8.6
通讯作者：
Godagama, D.
中科院分区：
文献类型：
--
作者：
Li, X.;Ahmed, M. W.;Banu, A.;Bartram, C.;Crowe, B.;Downie, E. J.;Emamian, M.;Feldman, G.;Gao, H.;Godagama, D.
在实验室框架中，使用加权平均能量值为 83.4 MeV (81.3 MeV) 的准单能线性（圆）偏振光子束，在 55°、90° 和 125° 散射角下测量了质子康普顿散射的微分截面。这些测量是在三角大学核实验室的高强度伽马射线源设施中进行的。将结果与之前的测量结果进行比较，并在手性有效场理论框架中进行解释，以提取质子的电磁偶极子极化率，得出 αE1p=13.8±1.2stat±0.1BSR±0.3theo，βM1p=0.2∓1.2stat±0.1BSR∓0.3theo，单位为 。
Differential cross sections for Compton scattering from the proton have been measured at scattering angles of 55°, 90°, and 125° in the laboratory frame using quasimonoenergetic linearly (circularly) polarized photon beams with a weighted mean energy value of 83.4 MeV (81.3 MeV). These measurements were performed at the High Intensity Gamma-Ray Source facility at the Triangle Universities Nuclear Laboratory. The results are compared to previous measurements and are interpreted in the chiral effective field theory framework to extract the electromagnetic dipole polarizabilities of the proton, which gives αE1p=13.8±1.2stat±0.1BSR±0.3theo,βM1p=0.2∓1.2stat±0.1BSR∓0.3theo in units of.