Constraining energy loss from high-pt azimuthal asymmetries
C. Andrés Casas*,
N. Armesto,
H. Niemi,
R. Paatelainen and
C. Salgado*: corresponding author
Pre-published on:
February 20, 2019
Published on:
April 24, 2019
Abstract
The nuclear modification factor $R_{\rm AA}$ has been satisfactorily described by various jet quenching models. Nonetheless, all these formalisms, until very recently, underpredicted the high-$p_{\rm T}$ (> 10 GeV) elliptic flow $v_2$. We find that the simultaneous description of these observables requires to strongly suppress the quenching for the first $\sim 0.6$ fm after the collision. This shows the potential of jet quenching observables to constrain the dynamics of the initial stages of the evolution.
DOI: https://doi.org/10.22323/1.345.0070
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