21–29 Aug 2019
Europe/Athens timezone
ICNFP 2019 follows HiX 2019 (also at the OAC), Int. Workshop devoted to Nucleon Structure at Large Bjorken-x (https://indico.cern.ch/event/799284/overview). Related ICNFP Session organized with HiX 2019 convenors will take place the 22-23 August

Quark-diquark models and fluctuations in thermal QCD

22 Aug 2019, 12:00
30m
Room 3

Room 3

Oral Presentation Workshop on QCD Workshop on QCD

Speaker

Dr Eugenio Megias (University of Granada)

Description

Fluctuations of conserved charges such as baryon number, electric charge and strangeness [1,2] may provide a test for completeness of states in lattice QCD for three light flavors [3-7]. We elaborate on the idea that the corresponding susceptibilities can be saturated with excited baryonic states with an underlying quark-diquark structure with a linearly confining interaction. Using Polyakov-loop correlators we show that in the static limit, the quark-diquark potential coincides with the quark-antiquark potential in marked agreement with recent lattice studies. We thus study in a quark-diquark model the baryonic fluctuations of electric charge, baryon number and strangeness: $\chi_{BQ}$, $\chi_{BB}$ and $\chi_{BS}$; by considering a realization of the hadron resonance gas model in the light flavor sector of QCD [8]. These results have been obtained by using the baryon spectrum computed within a relativistic quark-diquark model, leading to an overall good agreement with the spectrum obtained with other quark models and with lattice data for the fluctuations.

[1] S. Borsanyi, Z. Fodor, S. D. Katz, S. Krieg, C. Ratti, and K. Szabo, JHEP 01 (2012) 138.
[2] A. Bazavov et al. (HotQCD Collaboration), Phys. Rev. D86, 034509 (2012).
[3] E. Ruiz Arriola, L.L. Salcedo and E. Megias, Acta Phys. Polon. B45 (2014) 2407-2453.
[4] E. Ruiz Arriola, L.L. Salcedo, E. Megias, Acta Phys. Polon. Supp. 8 (2015) 2, 439.
[5] E. Megias, E. Ruiz Arriola, L.L. Salcedo, Phys. Rev. D94 (2016) 9, 096010.
[6] E. Ruiz Arriola, W. Broniowski, L.L. Salcedo, E. Megias, arXiv:1612.07091[hep-ph].
[7] E. Megias, E. Ruiz Arriola, L.L. Salcedo, Acta Phys. Polon. Supp. 11 (2018) 563.
[8] E. Megias, E. Ruiz Arriola, L.L. Salcedo, Phys. Rev. D99 (2019) 7, 074020.

Primary authors

Dr Eugenio Megias (University of Granada) Prof. Enrique Ruiz Arriola (Universidad de Granada) Prof. Lorenzo Luis Salcedo (University of Granada)

Presentation materials