where $n$ can depend on energy.

Resonance rings.
================

$\,\;\;$ [**Prediction 1.**]{} According to Eq. (\[cos\]) the ring-like two-dimensional distribution of hadrons similar to Cherenkov rings of photons can be observed in the plane perpendicular to the cone (jet) axis if $n>1$.

[**Proposal 1.**]{} Plot the one-dimensional pseudorapidity ($\eta =-\ln \tan \theta /2$) distribution with trigger momentum as $z$-axis neglecting the mismatch of trigger and away-side jets directions[^3]. It should have maximum at (\[cos\]).

This is the best possible one-dimensional projection of the ring.

This plot is still unavailable at RHIC. RHIC experiments [@5a; @6a; @adar; @jia] have shown the two-bump structure of the azimuthal angle ($\Delta \phi $) distribution (now with $z$-axis chosen along the collision axis) of particles with rather low transverse momenta near the away-side jets in central heavy-ion collisions. There is no such structure in pp-collisions. The difference has been attributed to “in-medium” effects. These features are clearly seen in Fig. 1 (the upper part for pp, lower one for Au-Au).

One easily notices the remarkable difference between particle distributions in the direction opposite to the trigger jet maximum positioned at $\Delta \phi = 0$. Both trigger and companion high-$p_T$ jets have been created in central 