Eur. Phys. J. A (2017) 53: 174
https://doi.org/10.1140/epja/i2017-12364-8

Regular Article - Theoretical Physics

Polarized heavy baryon production in quark-diquark model considering two different scenarios

¹ Faculty of Physics, Yazd University, P.O. Box 89195-741, Yazd, Iran
² School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran, Iran

^* e-mail: mmoosavi@yazd.ac.ir

Received: 28 June 2017
Accepted: 7 August 2017
Published online: 6 September 2017

Abstract

At sufficiently large transverse momentum, the dominant production mechanism for heavy baryons is actually the fragmentation. In this work, we first study the direct fragmentation of a heavy quark into the unpolarized triply heavy baryons in the leading order of perturbative QCD. In a completely different approach, we also analyze the two-stage fragmentation of a heavy quark into a scalar diquark followed by the fragmentation of such a scalar diquark into a triply heavy baryon: quark-diquark model of baryons. The results of this model are in acceptable agreement with those obtained through a full perturbative regime. Relying on the quark-diquark model and considering two different scenarios we determine the spin-dependent fragmentation functions of polarized heavy baryons in such a way that a vector or a pseudoscalar heavy diquark is an intermediate particle between the initial heavy quark and the final state baryon.