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See detailGroup Theoretical Analysis of the Wave Function of the $[ 70,1^-]$ Nonstrange Baryons in the $1/N_c$ Expansion
Matagne, Nicolas; Stancu, Floarea ULg

in AIP Conference Proceedings (2008), 1038

Using standard group theoretical techniques we construct the exact wave function of the $[{\bf 70},1^-]$ multiplet in the orbital, spin and flavor space. This symmetric wave function is compared to that ... [more ▼]

Using standard group theoretical techniques we construct the exact wave function of the $[{\bf 70},1^-]$ multiplet in the orbital, spin and flavor space. This symmetric wave function is compared to that customarily used in the $1/N_c$ expansion, which is asymmetric. The comparison is made by analyzing the matrix elements of various operators entering the mass formula. These matrix elements are calculated by the help of isoscalar factors of the permutation group, specially derived for this purpose as a function of $N_c$. We also compare two distinct methods used in the study of the $[{\bf 70},1^-]$ multiplet. In the first method the generators are divided into two parts, one part acting on a subsystem of $N_c-1$ quarks called core and another on the separated quark. In the second method the system is treated as a whole. We show that the latter is simpler and allows to clearly reveal the physically important operators in the mass formula. [less ▲]

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See detailGroup theoretical study of nonstrange and strange mixed symmetric baryon states [Nc-1,1] in the 1/Nc expansion
Matagne, Nicolas; Stancu, Floarea ULg

in Physical Review. D : Particles and Fields (2010), 81

Using group theory arguments we extend and complete our previous work by deriving all SU(6) exact wave functions associated with the spectrum of mixed symmetric baryon states [Nc-1,1] in the 1/Nc ... [more ▼]

Using group theory arguments we extend and complete our previous work by deriving all SU(6) exact wave functions associated with the spectrum of mixed symmetric baryon states [Nc-1,1] in the 1/Nc expansion. The extension to SU(6) enables us to study the mass spectra of both strange and nonstrange baryons, while previous work was restricted to nonstrange baryons described by SU(4). The wave functions are specially written in a form to allow a comparison with the approximate, customarily used wave functions, where the system is separated into a ground state core and an excited quark. We show that the matrix elements of the flavor operator calculated with the exact wave functions acquire the same asymptotic form at large Nc, irrespective of the spin-flavor multiplet contained in [Nc-1,1], while with the approximate wave function one cannot obtain a similar behavior. The isoscalar factors of the permutation group of Nc particles derived here can be used in any problem where a given fermion system is described by the partition [Nc-1,1], and one fermion has to be separated from the rest. [less ▲]

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See detailGroupe d'Ateliers de Recherche (GAR asbl)
Frankignoulle, Pierre ULg

in Archives : pour une reconnaissance de l'architecture. Livre blanc des archives en Fédération Wallonie-Bruxelles. (2013)

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See detailGroupe d'études et de recherche en analyse des décisions (GERAD)
Bodson, Laurent ULg

Scientific conference (2009, April 23)

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See detailLe groupe de pâtes « savonneuses » des céramiques gallo-romaines du nord de la Gaule Belgique
Deru, Xavier ULg

in Rivet (Ed.) Actes de la Société française d’étude de la céramique en Gaule, Bayeux, 2002 (2002)

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See detailLe groupe des « bisons adossés » de Lascaux : étude de la technique de l’artiste par analyse de pigments
Vignaud, Colette; Salomon, Hélène ULg; Chalmin, Emilie et al

in Anthropologie (L') (2006)

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See detailUn groupe si diversifié... Hiérarchies et typologies des domesticités dans les Pays-Bas autrichiens
Stevens, Xavier ULg

in Bernard, Bruno; Stevens, Xavier (Eds.) La domesticité au siècle des Lumières : Une approche comparative : Actes de la table-ronde tenue au XIIe Congrès International des Lumières, Montpellier, 8-15 juillet 2007 (2009)

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See detailLe Groupe transversal Ressources documentaires : l’expertise au service des bibliothèques universitaires du Sud
Pochet, Bernard ULg

in EchoSud (2008), (19), 30-31

Le monde des bibliothèques, pas toujours envisagé ni bien connu et parfois même déprécié, n’en est pas moins un maillon indispensable dans le processus de formation et dans celui de la recherche ... [more ▼]

Le monde des bibliothèques, pas toujours envisagé ni bien connu et parfois même déprécié, n’en est pas moins un maillon indispensable dans le processus de formation et dans celui de la recherche universitaires. Sans une bibliothèque performante et moderne, une université digne de ce nom ne peut s’imaginer capable de donner accès à une information exhaustive, récente et de qualité. Depuis la documentation de base, présente localement, jusqu’aux informations pointues, accessibles par des réseaux d’échange ou des portails spécialisés. Nos partenaires du Sud n’échappent pas à la règle. Cet article décrit un programme de soutien aux bibliothèques du Sud. [less ▲]

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See detailLe groupe µ et la théorie littéraire
Badir, Sémir ULg

in Ablali, Driss; Kastberg Sjöblom, Margareta (Eds.) Linguistique et Littérature. Cluny, 40 ans après (2010)

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See detailLe Groupe µ. Quarante ans de rhétorique générale- Trente trois de sémiotique visuelle
Dondero, Maria Giulia ULg; Sonesson, Goran

in Nouveaux Actes Sémiotiques (2010)

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See detailLes groupes d'entraide ou l'émergence de dynamiques citoyennes
Biquet, Véronique ULg

in Observatoire : Revue d'Action Sociale & Médico-Sociale (2003), 39

L'article montre comment les groupes d'entraide peuvent constituer des lieux d'émergence de dynamiques citoyennes, en permettant qu'un pont soit crée entre l'espace privé des relations interpersonnelles ... [more ▼]

L'article montre comment les groupes d'entraide peuvent constituer des lieux d'émergence de dynamiques citoyennes, en permettant qu'un pont soit crée entre l'espace privé des relations interpersonnelles et l'espace public des questions relatives à la cité. [less ▲]

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See detailLes groupes « Esprit » de Belgique durant l’entre-deux-guerres
Jadoulle, Jean-Louis ULg

in Emmanuel Mounier en Belgique. 70 ans d’ « Esprit » (2002)

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See detailGrowing degree-day concept
Bogaert, Jan ULg

Master's dissertation (1992)

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See detailGrowing into adult age : Cross-cultural point of view about adolescence
Stassart, Martine ULg

in Cahiers du CEP. (1996), 7(1), 13-38

There is no need to question the universality of the Oedipus complex: there is there always will be a paternal and a maternal imago to fix the primitive libido and the agressive drives through desire ... [more ▼]

There is no need to question the universality of the Oedipus complex: there is there always will be a paternal and a maternal imago to fix the primitive libido and the agressive drives through desire, jealousy and competition. On the other hand, what makes the major difference between the archaic mind and our modern western ideology is their cultural management of the Oedipus complex? Archaic societies use of rites of passage to prevent the return of Oedipus in adolescence whiile our culture gives free rein to the return of the repressed and does not fix any limit for adolescence to end. Each individual is then solitarily in charge of the stabilization of his adult identity. [less ▲]

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