高能氘核光致蜕变中反冲质子极化与圆偏振光子
Recoil-proton polarization in high-energy deuteron photodisintegration with circularly polarized photons.
作者信息
Jiang X, Arrington J, Benmokhtar F, Camsonne A, Chen J P, Choi S, Chudakov E, Cusanno F, Deur A, Dutta D, Garibaldi F, Gaskell D, Gayou O, Gilman R, Glashauser C, Hamilton D, Hansen O, Higinbotham D W, Holt R J, de Jager C W, Jones M K, Kaufman L J, Kinney E R, Kramer K, Lagamba L, de Leo R, Lerose J, Lhuillier D, Lindgren R, Liyanage N, McCormick K, Meziani Z-E, Michaels R, Moffit B, Monaghan P, Nanda S, Paschke K D, Perdrisat C F, Punjabi V, Qattan I A, Ransome R D, Reimer P E, Reitz B, Saha A, Schulte E C, Sheyor R, Slifer K, Solvignon P, Sulkosky V, Urciuoli G M, Voutier E, Wang K, Wijesooriya K, Wojtsekhowski B, Zhu L
机构信息
Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA.
出版信息
Phys Rev Lett. 2007 May 4;98(18):182302. doi: 10.1103/PhysRevLett.98.182302. Epub 2007 May 1.
We measured the angular dependence of the three recoil-proton polarization components in two-body photodisintegration of the deuteron at a photon energy of 2 GeV. These new data provide a benchmark for calculations based on quantum chromodynamics. Two of the five existing models have made predictions of polarization observables. Both explain the longitudinal polarization transfer satisfactorily. Transverse polarizations are not well described, but suggest isovector dominance.
我们测量了在光子能量为2 GeV时氘核两体光致蜕变中三个反冲质子极化分量的角度依赖性。这些新数据为基于量子色动力学的计算提供了一个基准。现有的五个模型中有两个对极化可观测量进行了预测。两者都对纵向极化转移给出了令人满意的解释。横向极化没有得到很好的描述，但表明同位旋矢量占主导。
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