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MOULTAKA Gilbert

Organisme : CNRS
Chargé de Recherche
Encadre la thèse de : UGHETTO M.,

Département: Physique Théorique
Equipe: Interactions fondamentales, Astroparticules et Cosmologie

Gilbert.Moultaka _AT_

univ-montp2.fr

0467143553

Bureau: 62, Etg: 1, Bât: 13 - Site : Campus Triolet

Page Web perso

Administration Nationale:

Expert ANR

Administration Locale:

Membre du conseil du laboratoire

Curriculum Vitae:

• Coord. scientifique L2C, Labex-OCEVU
• Membre ext. CS de l'IPNL
• Membre du pool d'experts, Universités P&M Curie
• Member du pool d'experts, Université B Pascal
• Responsable scientifique d'une AI France/Maroc

Projets de Recherche:

• co-direction d'une thèse

Domaines de Recherche:

Physique/Physique des Hautes Energies - Phénoménologie
Physique/Physique des Hautes Energies - Expérience
Physique/Physique Quantique
Planète et Univers/Astrophysique
Physique/Astrophysique
Physique/Relativité Générale et Cosmologie Quantique
Physique/Physique des Hautes Energies - Théorie
Physique/Physique mathématique
Mathématiques/Physique mathématique

Dernieres productions scientifiques :

h \gamma \gamma Coupling in Higgs Triplet Model

Auteur(s): Arhrib A., Benbrik R., Chabab M., MOULTAKA G., Rahili L.
Conference: International Workshop on Future Linear Colliders (Granada, ES, 2011-09-26)
Actes de conférence: International Workshop on Future Linear Colliders, vol. p.000 (2012)

Les Houches 2011: Physics at TeV Colliders New Physics Working Group Report

Auteur(s): Brooijmans G., Vásquez D. Albornoz, Alloul A., Arbey A., Bélanger G., Bondu O., Boudjema F., Calvet S., Cirelli M., da Silva J., Djouadi A., La Rochelle G. Drieu, Dumont B., Falkowski A., Fuks B., Gascon-Shotkin S., Gris P., Guadagnoli D., KNEUR J.-L., Kraml S., Lavalle J., Mahmoudi F., Maurin D., Moreau G., MOULTAKA G., Renaud A., Salati P., Slavich P., UGHETTO M., Valéry L.
Rapport d'expertise:

Higgs boson decay into 2 photons in the type~II Seesaw Model

Auteur(s): Arhrib A., Benbrik R., Chabab M., MOULTAKA G., Rahili L.
(Article) Publié: Journal of High Energy Physics, vol. 2012 p.136 (2012)

Revisiting No-Scale Supergravity Inspired Scenarios

Auteur(s): BENHENNI A. L., KNEUR J.-L., MOULTAKA G., Bailly Sean
(Document sans référence bibliographique) 2011-11-15

Higgs potential in the type II seesaw model

Auteur(s): Arhrib A., Benbrik R., Chabab M., MOULTAKA G., Peyranere M. C., Rahili L., Ramadan J.
(Article) Publié: Physical Review D, vol. 84 p.095005 (2011)

Ref HAL: hal-00608687_v1
Ref Arxiv: 1105.1925
DOI: 10.1103/PhysRevD.84.095005
Résumé: The standard model Higgs sector, extended by one weak gauge triplet of scalar fields with a very small vacuum expectation value, is a very promising setting to account for neutrino masses through the so-called type II seesaw mechanism. In this paper we consider the general renormalizable doublet/triplet Higgs potential of this model. We perform a detailed study of its main dynamical features that depend on five dimensionless couplings and two mass parameters after spontaneous symmetry breaking, and highlight the implications for the Higgs phenomenology. In particular, we determine (i) the complete set of tree-level unitarity constraints on the couplings of the potential and (ii) the exact tree-level boundedness from below constraints on these couplings, valid for all directions. When combined, these constraints delineate precisely the theoretically allowed parameter space domain within our perturbative approximation. Among the seven physical Higgs states of this model, the mass of the lighter (heavier) CPeven state h(0) (H-0) will always satisfy a theoretical upper (lower) bound that is reached for a critical value mu(c) of mu (the mass parameter controlling triple couplings among the doublet/triplet Higgses). Saturating the unitarity bounds, we find an upper bound m(h)(0) < O(0.7-1 TeV), while the upper bound for the remaining Higgses lies in the range of several tens of TeV. However, the actual masses can be much lighter. We identify two regimes corresponding to mu greater than or similar to mu(c) and mu less than or similar to mu(c). In the first regime the Higgs sector is typically very heavy, and only h(0) that becomes SM-like could be accessible to the LHC. In contrast, in the second regime, somewhat overlooked in the literature, most of the Higgs sector is light. In particular, the heaviest state H-0 becomes SM-like, the lighter states being the CPodd Higgs, the (doubly) charged Higgses, and a decoupled h(0), possibly leading to a distinctive phenomenology at the colliders.

Commentaires: 55 pages, 9 figures, no major changes, references added, a comment added to sec 3.1, typos corrected

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