Parcourir Sciences Et Techniques par type de document "Article scientifique"
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Comments on Yang–Mills thermodynamics: The Hagedorn spectrum and the gluon gas pictures for a generic gauge algebra
20 octobre 2011, HE Louvain en HainautArticle scientifiqueWe 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 ... -
Compte rendu de Sabine Hossenfelder : «Lost in Maths : comment la beauté égare la physique»
01 janvier 2020, HE Louvain en HainautArticle scientifiqueCompte rendu de Sabine Hossenfelder : «Lost in Maths : comment la beauté égare la physique» -
Q-ball formation at the deconfinement temperature in large-Nc QCD
23 janvier 2013, HE Louvain en HainautArticle scientifiqueThe 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 ... -
Relevance of glueball bound states in the Yang-Mills plasma within a many-body T-matrix approach
26 juillet 2012, HE Louvain en HainautArticle scientifiqueThe 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 ... -
Thermodynamics of the quark-gluon plasma within a T-matrix approach
24 juin 2015, HE Louvain en HainautArticle scientifiqueThe 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 ... -
Two- and three-body calculations within the dominantly orbital state method
14 mai 2013, HE Louvain en HainautArticle scientifiqueThe 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 ...