Most of the models of jet quenching generally assumes that a jet always travels in a straight eikonal path, which is indeed true for sufficiently hard jet but may not be a good one for moderate and low momentum jet. In this article an attempt has been made to relax part of this approximation for $2\to 3$ processes and found a (15–20)% suppression in the differential cross section for moderately hard jets because of the noneikonal effects. In particular, for the process $q{q}^{\prime }\to q{q}^{\prime }g$ in the centre of momentum frame the scattering with an angle wider than $\pm 0.52\pi$ is literally forbidden unlike the process $gg\to ggg$ that allows an angular range $\pm \pi$. This may have consequence on the suppression of hadronic spectra at low transverse momenta.

• Received 17 January 2013

DOI:https://doi.org/10.1103/PhysRevD.87.034036