Laboratoire Charles Coulomb UMR 5221 CNRS/UM2 (L2C)


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Team: Fundamental Interactions, Astroparticles and Cosmology (IFAC)

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.

The IFAC seminar series can be found HERE.
Seminars are currently organized by Julien Lavalle (for LUPM) and Michele Frigerio (for L2C).

Ours activities are spanning various domains, from theoretical subjects in quantum field theory , to phenomenological studies linked to current experiments in particle physics (e.g. the Large Hadron Collider), as well in astroparticles and cosmology (Fermi, AMS, Planck, etc.).

One may describe those activities along the following sub-topics:

- Theory and phenomenology beyond 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 detection, study of collider signatures and complementarity; 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.

- Cosmology: Dark energy models, 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)).

- Nonperturbative QCD & Hadron Physics: 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.

IFAC is part of several research networks at the national and international scale: the French working group «Terascale»; the French-Moroccan working group P2IM; the program PNHE; the Labex OCEVU; the European ITN project Elusives.
Several external collaborations are also ongoing, e.g. with researchers from the ATLAS collaboration at CERN (Geneva), CPPM (Marseille) and LAL (Orsay).

A nice subset of the team members :
A nice subset of the team members

  • ABELLAN Guillermo (PhD)
  • ABU-AJAMIEH Fayez (Postdoc)
  • ELANDER Daniel (Postdoc)
  • FACCHINETTI Gaétan (PhD)
  • FERNANDEZ Loïc (PhD)
  • MURGIA Riccardo (Postdoc)
  • PETAC Mihael (Postdoc)
  • VEISSI Daniel (PhD)
  • BIZOT Nicolas (postdoc @ IPNL, Lyon)
  • COY Rupert (postdoc @ ULB, Brussels)
  • CRAMPÉ Nicolas (researcher @ IDP, Tours)
  • EL KOSSEIFI Rima (PhD student @ CPPM, Marseille)
  • FELIGIONI Lorenzo (researcher @ CPPM, Marseille)
  • KNECHT Marc (researcher @ CPT, Marseille)
  • LACROIX Thomas (postdoc @ IFT, Madrid)
  • SAVELIEV Andrey (researcher @ IKBFU, Kaliningrad)
  • STREF Martin (postdoc @ LAPTh, Annecy)

L2C personal webpages :

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Latest publications

+ Revisiting the Askey–Wilson algebra with the universal R -matrix of Uq(su(2)) doi link

Author(s): Crampé N.(Corresp.), Gaboriaud Julien, Vinet Luc, Zaimi Meri

(Article) Published: Journal Of Physics A: Mathematical And Theoretical, vol. 53 p.05LT01 (2020)
Links openAccess full text : arxiv

+ Bannai–Ito algebras and the universal R-matrix of osp(1|2) doi link

Author(s): Crampé N.(Corresp.), Vinet Luc, Zaimi Meri

(Article) Published: Letters In Mathematical Physics, vol. 110 p.1043-1055 (2020)
Links openAccess full text : arxiv

+ Racah problems for the oscillator algebra and $\mathfrak{sl}_n$ hal link

Author(s): Crampé N., Vinet Luc, van de Vijver Wouter

(Document without bibliographic reference)