Speaker
Description
Heavier resonances are continually being added to the hadronic spectrum from the Particle Data
Group [1]. The existence of additional states is predicted by relativistic quark models [2, 3]. It has
been suggested [4, 5] that further states might need to be included in the hadronic spectrum in order
to improve the agreement between the hadron resonance gas model predictions and lattice QCD
data. However, for some selected observables, the inclusion of these states worsens the agreement
with the lattice results. We propose a new set of observables which allow us to test the predictions
of the quark model, by dividing the new states according to their quantum numbers. This will help
to clarify the situation and determine how many new states are needed.
[1] K. A. Olive et al. [Particle Data Group Collaboration],
Chin. Phys. C 38, 090001 (2014). doi:10.1088/1674-
1137/38/9/090001
[2] S. Godfrey and N. Isgur, Phys. Rev. D 32, 189 (1985).
doi:10.1103/PhysRevD.32.189
[3] S. Capstick and N. Isgur, Phys. Rev. D 34,
2809 (1986) [AIP Conf. Proc. 132, 267 (1985)].
doi:10.1103/PhysRevD.34.2809, 10.1063/1.35361
[4] A. Majumder and B. Muller, Phys. Rev. Lett.
105, 252002 (2010) doi:10.1103/PhysRevLett.105.252002
[arXiv:1008.1747 [hep-ph]].
[5] A. Bazavov et al., Phys. Rev. Lett. 113, no.
7, 072001 (2014) doi:10.1103/PhysRevLett.113.072001
[arXiv:1404.6511 [hep-lat]].
