Seminar in Hadronic Physics

Thermalization of a hard parton in a QCD plasma

Ismail Soudi

Wayne State University

In heavy ion collisions, hard particles created at the beginning stages must pass through the Quark-Gluon Plasma (QGP) before reaching the detector. As they interact with the medium, these particles experience an energy cascade that transfers energy from the hard scales to the soft medium scales. The primary mechanism of energy degradation for these hard partons is through collinear radiation. However, I will demonstrate how the energy that reaches the soft scales is rapidly transported to large angles with respect to the jet axis, particularly when the opening angle exceeds 0.3 radians. This increased sensitivity to thermalization effects highlights the importance of studying jet cone dynamics in order to fully understand medium response [1-2]. Additionally, I will explore how interactions with the medium can drastically alter the baryon content of jets, resulting in a ring of fermions surrounding the hard core and may contribute to observed baryon enhancements at intermediate transverse moment a[3].

[1]- Schlichting S, Soudi I. JHEP 07:077 (2021)
[2]- Mehtar-Tani Y, Schlichting S, Soudi I. arXiv:2209.10569 (2022)
[3]- Sirimanna C, Soudi I, Vujanovic G, Xing WJ, Cao S, Majumder A. arXiv:2211.15553 (2022)