High Energy / Nuclear Theory / RIKEN seminars

# [Hybrid RBRC seminar] CGC density matrix

US/Eastern
2-160 (https://bnl.zoomgov.com/j/1606067399?pwd=am02b0xIUXZ6TDR3d1dWL05TTDdaUT09)

### 2-160 (https://bnl.zoomgov.com/j/1606067399?pwd=am02b0xIUXZ6TDR3d1dWL05TTDdaUT09)

Description

I will discuss the density matrix, entanglement entropy and their small x evolution in a color glass condensate (CGC). Specifically I will show that the CGC density matrix is diagonal in the quasiparticle basis, where it has the Boltzmann form. The quasiparticles in a wide interval of momenta behave as massless two-dimensional bosons with the temperature proportional to the typical semihard scale. I will argue that the semihard momentum region arises as a well-defined intermediate regime between the perturbatively hard momenta and the nonperturbative soft momenta in the CGC description of a hadronic wave function.

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