Momentum anisotropy effects for quarkonium in a weakly-coupled quark-gluon plasma below the melting temperature

Understand

In the early stages of heavy-ion collisions, the hot QCD matter expands more longitudinally than transversely.

• This imbalance causes the system to become rapidly colder in the longitudinal direction and a local momentum anisotropy appears.
• In this paper, we study the heavy-quarkonium spectrum in the presence of a small plasma anisotropy.
• We work in the framework of pNRQCD at finite temperature.