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Accueil > Recherche > Les Axes et Activités de Recherche > Interactions fondamentales, Astroparticules et Cosmologie

Interactions fondamentales, Astroparticules et Cosmologie (IFAC)

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This scientific team gathers physicists from both Laboratoire Univers et Particules de Montpellier (LUPM) and Laboratoire Charles Coulomb (L2C).

Fundamental Interactions, Particle Astrophysics and Cosmology - LUPM Theory Group


NEW !!! : As of 2017, the LUPM-IFAC team wishes to attract applicants to CNRS permanent positions (yearly opening in Dec.) working primarily on astroparticle physics and/or cosmology with strong expertise in theoretical astrophysics and/or cosmology and strong interest in BSM particle physics (e.g. dark matter, inflation, primordial magnetic fields, etc.). Please contact J. Lavalle for further information.

This scientific team gathers physicists from both Laboratoire Univers et Particules de Montpellier (LUPM) and Laboratoire Charles Coulomb (L2C). The member list is provided at the bottom of this page.
Our seminar webpages can be accessed from here (LUPM) and there (L2C). The local organizers are Felix Brümmer (for LUPM) and Michele Frigerio (for L2C).

Ours activities are spanning various domains, from formal subjects in field theory to theoretical and phenomenological topics linked to current experiments in high-energy collider particle physics (e.g. LHC), or experiments in astroparticle and cosmology (Fermi, AMS, Planck, XENON, LUX, etc.).
One may describe those activities along the following sub-topics :

- Theory and phenomenology beyond the Standard Model :
Minimal Supersymmetric Standard Model (MSSM) or its extension with a singlet (NMSSM) ; supersymmetry breaking models (super-gravity, AMSB, GMSB) ; development of codes dedicated to the computation of super-particle spectra (SuSpect, NMSSMTools) ; Grand Unification (GUT) models ; flavor physics (neutrinos, leptogenesis) ; composite models ; phenomenology at colliders and complementarity with dark matter searches.

- Astroparticle Physics :
supersymmetric dark matter candidates (neutralinos, gravitinos, singlinos) or others (e.g. composite models) ; generic relic density calculations (WIMPs, FIMPs, etc.) ; theoretical analyses for direct and indirect searches, study of collider signatures and complementarities ; constraints from Big Bang Nucleosynthesis (BBN) ; phenomenology of Galactic cosmic rays (diffusive transport and interactions) ; high-energy antimatter cosmic rays (positrons, antiprotons) ; local astrophysical sources of positrons ; dark matter subhalos.

NB : the 2 above topics are featured by many collaborations at the national scale within different networks, e.g. the ’GDR-supersymmetry’ working group and current successors (« Terascale » GDR), or the PNHE. Other external collaborations are also presently going on with researchers from the ATLAS collaboration (CERN, LAL Orsay, CPPM-Marseille, etc), and theorists from CPT-Marseille, mostly through the OCEVU network.

- Cosmology :
Inflationary models, study of the universe expansion and growth of perturbations ; physics of the very early universe : generation of gravitational waves, evolution of the universe immediately after inflation ; Big Bang Nucleosynthesis (BBN) and the cosmic Lithium 7 problem ; primordial magnetic fields ; semi-analytic methods for fluid mechanics and magneto-hydrodynamics applied to the evolution of astrophysical and cosmological fluids ; modified gravity models (e.g. scalar-tensor, f(R)).

- Non-perturbative QCD :
study of some nonperturbative Quantum Chromodynamics (QCD) phenomena related to the dynamical properties of hadrons (spectra and decays) using, in particular, the QCD spectral sum rule approach. This method is among the very few analytical ones which uses the fundamental QCD parameters (alpha_s, quark masses, quark and gluon condensates, etc.) and is a robust alternative and/or complement to lattice numerical calculations.

- Quantum field theory :
Formal aspects in quantum field theory (QFT). Non-perturbative approaches (variationally optimized perturbation, resummations, renormalization group) in field theories and condensed matter : applications in QCD and low energy hadron physics. Studies of phase transitions at finite temperature and density.






Quantum field Theory / Mathematical Physics Group : link

IFAC LUPM/L2C Seminars :