Jet quenching of quarks and gluons in central A + A collisions suppresses the high-pT meson production and exposes novel baryon dynamics that we attribute to (gluonic) baryon junctions. This mechanism predicts baryon enhancement in a finite moderate-pT window that decreases with increasing impact parameter. We also extend recent calculations of the transverse momentum behavior of p/π and p̄/π to...

The statistical production of antibaryons is considered within the canonical ensemble formulation. We demonstrate that the antibaryon suppression in small systems due to the exact baryon number conservation is rather different in the baryon–free (B = 0) and baryon–rich (B ≥ 2) systems. At constant values of temperature and baryon density in the baryon–rich systems the density of the produced an...

The production of baryons containing two charmed quarks (Ξ∗cc or Ξcc) in hadronic interactions at high energies and large transverse momenta is considered. It is supposed, that Ξcc-baryon is formed during a non-perturbative fragmentation of the (cc)diquark, which was produced in the hard process of c-quark scattering from the colliding protons: c + c → (cc) + g. It is shown that such mechanism ...

There is a striking suppression of the cross section for production of octet baryons in e+e− annihilation, as the mass of the produced hadron increases. We present a simple parametrization for the fragmentation functions into octet baryons guided by two input models: the SU(3) flavor symmetry part is given by a quark-diquark model, and the baryon mass suppression part is inspired by the string ...

Events with a baryon carrying a large fraction of the proton beam energy have been observed in ep scattering at HERA [1, 2]. The dynamical mechanisms for their production are not completely understood. They may be the result of hadronization of the proton remnant, leaving a baryon in the final state. Exchange of virtual particles is also expected to contribute. In this picture, the target proto...

Leptogenesis constitues a very simple scenario to achieve the baryon asymmetry that we observe today. It requires only the presence of right handed neutrinos (which arise very naturally in many extensions of the Standard Model) and depends crucially on the mechanism responsible for their production. In particular, when their mass exceeds the inflaton mass (10 13 GeV in chaotic inflation) only n...