Speaker
Mr
Alessandro Nada
(University of Torino & INFN, Turin)
Description
We present high-precision lattice calculations of the thermodynamics of
Yang-Mills theories with different gauge groups. In the confining phase,
we show that the equation of state is described remarkably well by a gas
of massive, non-interacting glueballs, provided that an effective
bosonic closed-string model is used to derive an exponentially growing
Hagedorn spectrum for the heavy states. In particular, this model
describes very accurately the results for the SU(3) theory reported by
Borsányi et al. in JHEP 07 (2012) 056, as well as a novel set of lattice
data for the SU(2) theory. In addition, we also also show that the
equation of state in the deconfined phase exhibits a near perfect
proportionality to the number of gluon degrees of freedom, including for
the Yang-Mills theory based on the exceptional, center-less gauge group G$_2$.
Author
Mr
Alessandro Nada
(University of Torino & INFN, Turin)
Co-authors
Marco Panero
(University of Turin and INFN, Turin)
Mattia Bruno
(NIC, DESY)
Michele Caselle
(University of Turin & INFN, Turin)
Roberto Pellegrini
(University of Edinburgh)
