Stéphane MUNIER


"Directeur de recherche" at CNRS

Associate professor at École polytechnique

Research group: Particle Physics

Address CPHT, Ecole Polytechnique, 91128 Palaiseau cedex, France
Phone 01 69 33 42 85
Fax 01 69 33 49 49
Office Buliding 6, office 06.1033

Current interests

Theory and phenomenology of quantum chromodynamics (QCD) in the high-energy high-density regime; stochastic fronts, branching random walks.

My main expertise is in high-energy quantum chromodynamics, of which I am currently investigating both phenomenological and theoretical aspects. The very high energy regime of QCD is especially interesting since it is a regime of weak coupling and strong fields, in which nonlinear-high density effects, the so-called saturation of the parton densities, play an important role. A few years ago, we pointed out that the energy evolution of QCD scattering amplitudes is similar to the time evolution of a branching random with or without selection, studied in statistical physics, mathematics and evolutionary biology. This fact triggered my interest for the general study of such abstract processes. I am presently working both on the phenomenology of proton-ion collisions (energy loss, multiplicity fluctuations of final-state particles), and on branching random walks.

National networks

ANR Dense QCD et LHC (ANR-16-CE31-0019-02) 


Contributions à l'etude de la chromodynamique quantique perturbative appliquee à la diffusion profondement inelastique à petit x b j
PhD defense at Ecole Polytechnique, 2000
Advisor : R. Peschanski (Service de Physique Théorique, CEA-Saclay)

Recent Articles

Le AD, Mueller AH, Munier S.
Nuclear scattering configurations of onia in different frames.
Physical Review D. 2021;103(5):054031.
DOI: 10.1103/PhysRevD.103.054031

Brunet É, Le AD, Mueller AH, Munier S.
How to generate the tip of branching random walks evolved to large times.
EPL. 2020;131(4):40002.
DOI: 10.1209/0295-5075/131/40002.

Mueller AH, Munier S.
Particle-number distribution in large fluctuations at the tip of branching random walks.
Physical Review E. 2020;102(2):022104.
DOI: 10.1103/PhysRevE.102.022104.

Munier S.
Fluctuations in small systems.
Diffraction and Low-X Workshop Location: Reggio Calabria, Italy, AUG 26-SEP 01, 2018 Acta Physica Polonica B Proceedings supplement 2019 12 (4): 967-972.
DOI: 10.5506/APhysPolBSupp.12.967.

Le A-D, Munier S.
Rapidity gaps and ancestry.
Diffraction and Low-X Workshop Location: Reggio Calabria, Italy, AUG 26-SEP 01, 2018 Acta Physica Polonica B Proceedings supplement 2019 12 (4): 825-830.
DOI: 10.5506/APhysPolBSupp.12.825.

Dominé L, Giacalone G, Lorcé C, Munier S, Pekar S.
Gluon density fluctuations in dilute hadrons.
Physical Review D. 2018;98(11):114032.
DOI: 10.1103/PhysRevD.98.114032./p>

Mueller AH, Munier S.
Rapidity gap distribution in diffractive deep-inelastic scattering and parton genealogy.
Physical Review D. 2018;98(3):034021.
DOI: 10.1103/PhysRevD.98.034021. Mueller AH, Munier S.

Munier S.
Diffractive patterns in deep-inelastic scattering and parton genealogy.
QCD@Work, Matera, Juin 2018 EPJ Web Conf 192 (2018) 00008 Conference: C18-06-252.
DOI: 10.1051/epjconf/201819200008.

Diffractive electron-nucleus scattering and ancestry in branching random walks.
Physical Review Letters. 2018;121(8):082001.
DOI: 10.1103/PhysRevLett.121.082001.

Tseh Liou, Mueller A.H. , Munier S.
Fluctuations of the multiplicity of produced particles in onium-nucleus collisions.
Phys.Rev. D95 (2017) no.1, 014001.

Munier S., Peigné S., Petreska E.
Medium-induced gluon radiation in hard forward parton scattering in the saturation formalism.
Phys.Rev. D95 (2017) no.1, 014014.

Dominé L, Lorcé c, Munier S, Pekar S.
Distribution of the number of particles in the final state of hadron-nucleus collisions.
in: DIFFRACTION 2017: International Workshop on Diffraction in High-Energy Physics.
PoS DIS2017 (2017) 069

Most significant publications

Mueller A.H., Munier S.
Phenomenological picture of fluctuations in branching random walks.
Phys.Rev. E90 (2014) no.4, 042143.

Mueller A.H., Munier S.
p perpendicular to-Broadening and production processes versus dipole/quadrupole amplitudes at next-to-leading order.
Nuclear Physics A 2012;893:43-86.

Iancu E., Mueller A.H., Munier S. 
Universal behavior of QCD amplitudes at high energy from general tools of statistical physics 
Phys.Lett. B 2005 ; 606 : 342-350

Brunet E., Derrida B., Mueller A. H., Munier S.
Phenomenological theory giving the full statistics of the position of fluctuating pulled fronts. 
Physical Review E 2006 ; 73(5) : 056126.

Munier S., Peschanski R.
Geometric scaling as traveling waves 
Phys.Rev.Lett. 2003 ; 91 : 232001

Munier S., Stasto A.M., Mueller A.H.
Impact parameter dependent S-matrix for dipole proton scattering from diffractive meson electroproduction 
Nucl.Phys. B 2001 ; 603 : 427

Review papers

Munier S.
Statistical physics in QCD evolution towards high energies.
Sci.China Phys.Mech.Astron. 58 (2015) no.8, 81001.

Munier S.
Quantum chromodynamics at high energy and statistical physics.

Habilitation thesis

Munier S. 
Quantum chromodynamics at high energy and noisy traveling waves 

Publications from INSPIRE