Use of the Husimi distribution for nucleon tomography

作者：Hagiwara Yoshikazu; Hatta Yoshitaka^*

来源：Nuclear Physics A, 2015, 940: 158-166.

DOI：10.1016/j.nuclphysa.2015.04.005

• Nucleon structure
• Wigner distribution
• GPD
• TMD

In the context of nucleon structure, the Wigner distribution has been commonly used to visualize the phase-space distribution of quarks and gluons inside the nucleon. However, the Wigner distribution does not allow for a probabilistic interpretation because it takes negative values. In pursuit of a positive phase-space distribution in QCD, we introduce the Husimi distribution and demonstrate its advantages via a simple one-loop example. We also comment on a possible connection to the semiclassical approach to saturation physics at small-x.

• 出版日期2015-8