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Compte rendu de Sabine Hossenfelder : «Lost in Maths : comment la beauté égare la physique»
01 janvier 2020,
- HE Louvain en Hainaut
,
- Article scientifique
Article scientifique
Compte rendu de Sabine Hossenfelder : «Lost in Maths : comment la beauté égare la physique»
Relevance of glueball bound states in the Yang-Mills plasma within a many-body T-matrix approach
26 juillet 2012,
- HE Louvain en Hainaut
,
- Article scientifique
Article scientifique
The strongly coupled phase of Yang-Mills plasma with gauge group SU(3) is studied in a Tmatrix
approach. The existence of lowest-lying glueballs, interpreted as bound states of two
transverse gluons (quasi-particles in a many-body setup), is analyzed in a non-perturbative scattering
formalism with the input of lattice-QCD static potentials. The relevance of the singlet and
the (colored) octet ...
Q-ball formation at the deconfinement temperature in large-Nc QCD
23 janvier 2013,
- HE Louvain en Hainaut
,
- Article scientifique
Article scientifique
The deconfinement phase transition in large-Nc QCD is studied within the framework of an effective
Polyakov-loop model, where the potential has a U(1) symmetry originating in the large-Nc limit of a
ZNc-symmetric model. At the critical temperature, the shape of the effective potential allows the existence
of Q-balls as position-dependent fluctuations of the Polyakov loop. Q-balls with spherical ...
Two- and three-body calculations within the dominantly orbital state method
14 mai 2013,
- HE Louvain en Hainaut
,
- Article scientifique
Article scientifique
The dominantly orbital state method allows a semiclassical description of quantum systems. At the origin, it was developed for two-body relativistic systems. Here, the method is extended to treat two-body Hamiltonians and systems with three identical particles, in D≥2 dimensions, with arbitrary kinetic energy and potential. This method is very easy to implement and can be used in a large variety of ...
Comments on Yang–Mills thermodynamics: The Hagedorn spectrum and the gluon gas pictures for a generic gauge algebra
20 octobre 2011,
- HE Louvain en Hainaut
,
- Article scientifique
Article scientifique
We discuss the dependence of pure Yang–Mills equation of state on the choice of gauge algebra. In the
confined phase, we generalize to an arbitrary simple gauge algebra Meyer’s proposal of modeling the
Yang–Mills matter by an ideal glueball gas in which the high-lying glueball spectrum is approximated by
a Hagedorn spectrum of closed-bosonic-string type. Such a formalism is undefined above the ...
Thermodynamics of the quark-gluon plasma within a T-matrix approach
24 juin 2015,
- HE Louvain en Hainaut
,
- Article scientifique
Article scientifique
The strongly coupled phase of the quark-gluon plasma (QGP) is studied here by resorting to a T -matrix
formulation in which the medium is seen as a nonideal gas of quasiparticles (quarks, antiquarks, and gluons)
interacting nonpertubatively. In the temperature range under study, (1–5)Tc, where Tc is the temperature of
deconfinement, the interactions are expected to be strong enough to generate ...