The effect of gluon saturation on baryon stopping and charge deposition

by Dr Oscar Garcia-Montero (Bielefeld University)

Tuesday 17 Dec 2024, 11:00 → 13:00 US/Eastern

I will discuss our recent results on how gluon saturation affects baryon stopping in the valence quark picture. For this we have compute baryon and electric charge deposition in high-energy heavy-ion collisions using the Color Glass Condensate (CGC) Effective Field Theory, where at leading order charge is deposited through multiple scatterings of valence quarks with a saturated gluon target. A simplified phenomenological formula is derived to describe charge deposition, from which the parametrical dependence with collisional energy and geometry can be extracted. We present an approximate analytical prediction of the so-called baryon stopping parameter $\alpha_B$, which shows excellent agreement with the state-of-the art extractions of  $\alpha_B$ from experimental data. These results are further validated using the McDIPPER framework, by computing charge deposition at midrapidity across a range of collision energies ( $\sqrt{s_{NN}} = 62.4 − 5020$ GeV).