Quark-diquark string tension, excited baryonic resonances and thermal fluctuations

Abstract

We study the baryonic fluctuations from second to eighth order involving electric charge, baryon number and strangeness below the quark-gluon plasma crossover and numerically known from lattice QCD calculations. By considering a particular realization of the Hadron Resonance Gas model, we provide evidence on the dominant role of quark-diquark degrees of freedom to describe excited baryonic resonances.After proving by means of suitable Polyakov loop correlators that the quark-diquark and the quark-antiquark forces coincide, Vq q (r) = Vq D (r) + const, we find that the corresponding susceptibilities can be saturated with excited baryonic states in a quarkdiquark model picture.

Recoupling mechanism for exotic mesons and baryons

“…we are replacingq 2 by the diquark (qq ′ ). The accuracy of this replacement was discussed in literature [61][62][63][64][65] and the interactions are discussed and compared in [66]. In what follows we need the approximate baryon wave functions as ψ As a first example one can take the transitions p + φ →K * + Λ with thresholds M 1 = 1960 MeV and M 2 = 2005 MeV, where the role of quarksQ 1 , Q 2 is played bys, s and one has a transition u(ud) +ss →su + s(ud), where all β parameters have a similar magnitude, and one can expect a peak nearby M 2 .…”