A5086226481- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Advanced Materials and Mechanics
- Nuclear Materials and Properties
- Graphite, nuclear technology, radiation studies
- Cosmology and Gravitation Theories
- Shape Memory Alloy Transformations
- Adhesion, Friction, and Surface Interactions
- Distributed and Parallel Computing Systems
Southern Methodist University
2015-2021
Centre National de la Recherche Scientifique
2013-2015
Sorbonne Université
2015
Laboratoire Matière et Systèmes Complexes
2015
Sorbonne Paris Cité
2015
Université Paris Cité
2015
Laboratoire de Physique Subatomique et de Cosmologie
2014
Université Joseph Fourier
2013-2014
Institut National de Physique Nucléaire et de Physique des Particules
2014
Université Grenoble Alpes
2013
We present the new nCTEQ15 set of nuclear parton distribution functions with uncertainties. This fit extends CTEQ proton PDFs to include dependence using data on nuclei all way up 208^Pb. The uncertainties are determined Hessian method an optimal rescaling eigenvectors accurately represent for chosen tolerance criteria. In addition Deep Inelastic Scattering (DIS) and Drell-Yan (DY) processes, we also inclusive pion production from RHIC help constrain gluon PDF. Furthermore, investigate...
Baryon and lepton numbers being accidental global symmetries of the Standard Model (SM), it is natural to promote them local symmetries. However, preserve anomaly-freedom, only combinations B–L are viable. In this spirit, we investigate possible dark matter realizations in context $$U(1)_\mathrm{B{-}L}$$ model: (i) Dirac fermion with unbroken B–L; (ii) broken (iii) scalar matter; (iv) two-component matter. We compute relic abundance, direct indirect detection observables confront recent...
We provide a comprehensive comparison of $$W^\pm / Z$$ vector boson production data in pPb and PbPb collisions at the LHC with predictions obtained using nCTEQ15 PDFs. identify measurements which have largest potential impact on PDFs, estimate effect including these Bayesian reweighting method. find this set can information as regards both nuclear corrections heavy flavor (strange quark) PDF components. As for proton, parton determination/separation is dependent (from target DIS, example),...
The extraction of the strange quark parton distribution function (PDF) poses a long-standing puzzle. Measurements from neutrino-nucleus deep inelastic scattering (DIS) experiments suggest is suppressed compared to light sea quarks, while recent studies W/Z boson production at LHC imply larger component small x values. As flavor determination in proton depends on nuclear corrections, e.g. heavy-target DIS, heavy ion measurements can provide distinct perspective help clarify this situation. In...
In its simplest form the magnetoelastic buckling instability refers to sudden bending transition of an elastic rod experiencing a uniform induction field applied at normal angle with respect long axis. This fundamental physics phenomenon was initially documented in 1968, and, surprisingly, despite many refinements, gap has always remained between observations and theoretical expectations. Here, we first renew theory simple model based on assumption that magnetization follows axis as soon it...
Heavy quark parton distribution functions (PDFs) play an important role in several Standard Model and New Physics processes. Most analyses rely on the assumption that charm bottom PDFs are generated perturbatively by gluon splitting do not involve any non-perturbative degrees of freedom. It is clearly necessary to test this hypothesis with suitable QCD Conversely, a non-perturbative, intrinsic heavy has been predicted literature. We demonstrate very good approximation scale-evolution content...
QCD resummation predictions for the production of charged (W ′) and neutral (Z heavy gauge bosons decaying leptonically are presented. The results our code at next-to-leading order logarithmic (NLO+NLL) accuracy compared to Monte Carlo obtained with PYTHIA leading (LO) supplemented parton showers (PS) FEWZ NLO next-to-next-to-leading (NNLO) p T -differential total cross sections in Sequential Standard Model (SSM) general SU(2)×SU(2)×U(1) models. LO+PS NNLO fixed-order shown agree...
We investigate the impact of displaced heavy quark matching scales in a global fit. The scale $\mu_{m}$ determines at which energy $\mu$ QCD theory transitions from $N_{F}$ to $N_{F}+1$ Variable Flavor Number Scheme (VFNS) for evolution Parton Distribution Functions (PDFs) and strong coupling $\alpha_S(\mu)$. study variation scales, their on PDF fit combined HERA data. As choice effectively is scheme, this represents theoretical uncertainty; ideally, we would like see minimal dependence...
We present the calculation of NLO QCD corrections to electroweak production top-antitop pairs at CERN LHC in presence a new neutral gauge boson. The are implemented parton shower Monte Carlo program POWHEG. Standard Model (SM) and physics interference effects properly taken into account. QED singularities, first appearing this order, consistently subtracted. Numerical results presented for SM Z ′ total cross sections distributions invariant mass, transverse momentum, azimuthal angle rapidity...
A wide range of models beyond the Standard Model predict charged and neutral resonances, generically called ${W}^{\ensuremath{'}}$ ${Z}^{\ensuremath{'}}$ bosons, respectively. In this paper we study impact such resonances on deep inelastic scattering ultra-high energy neutrinos as well resonant current ${\overline{\ensuremath{\nu}}}_{e}{e}^{\ensuremath{-}}$ (Glashow resonance). We find that effects cannot be observed with Pierre Auger Observatory or any foreseeable upgrade it.
Heavy quark parton distribution functions (PDFs) play an important role in several Standard Model and New Physics processes. Most analyses rely on the assumption that charm bottom PDFs are generated perturbatively by gluon splitting do not involve any non-perturbative degrees of freedom. It is clearly necessary to test this hypothesis with suitable QCD Conversely, a non-perturbative, intrinsic heavy has been predicted literature. We demonstrate very good approximation scale-evolution content...
We calculate the vacuum stability conditions and renormalisation group equations for extensions of standard model with a higher colour multiplet scalar up to representation 15′ that leaves strong interaction asymptotically free. In order find conditions, we orbit spaces self-couplings multiplets, which representations 15 SU(3) c are highly complicated. However, if potential is linear in space variables, it sufficient know convex hull space. Knowledge also facilitates minimisation potentials....
We present the first official release of nCTEQ nuclear parton distribution functions with errors.The main addition to previous PDFs is introduction PDF uncertainties based on Hessian method.Another important inclusion pion production data from RHIC that give us a handle constraining gluon PDF.This contribution summarizes our results [1] and concentrates comparison other groups providing distributions.
We present the first official release of nCTEQ nuclear parton distribution functions with errors. The main addition to previous PDFs is introduction PDF uncertainties based on Hessian method. Another important inclusion pion production data from RHIC that give us a handle constraining gluon PDF. This contribution summarizes our results arXiv:1509.00792 and concentrates comparison other groups providing distributions.
In light of the conspicuous absence SUSY in energy range explored by LHC during run I, non-supersymmetric BSM scenarios are becoming more and attractive. One key ingredient exploring such physics renormalization group equations (RGEs) that essential for extrapolating theory to higher scales. Although two-loop RGEs a general quantum field have been known some time, it is only recently their automation has become available form Python program called PyR@TE. this talk, I will present features...
Kinetic mixing is a fundamental property of models with gauge symmetry involving several U(1) group factors. In this paper, we perform numerical study the impact kinetic on beta functions at two-loop. To do so, use recently published PyR@TE 2 software to derive complete set renormalization equations standard model B-L two-loop including mixing. We show that it important properly account for as evolution parameters energy scale can change drastically. some cases, these modifications even lead...
AFTER@LHC is an ambitious fixed-target project in order to address open questions the domain of proton and neutron spins, Quark Gluon Plasma high-x physics, at highest energy ever reached mode. Indeed, thanks highly energetic 7 TeV 2.76 A.TeV lead LHC beams, center-of-mass energies as large [see formula PDF] = 115 GeV pp/pA 72 AA can be reached, corresponding uncharted between SPS RHIC. We report two main ways performing collisions LHC, both allowing for usage one existing experiments. In...
Thanks to its multi-TeV LHC proton and lead beams, the complex allows one perform most energetic fixed-target experiments ever study with high precision pp, pd pA collisions at sqrt(s_NN) = 115 GeV Pbp PbA 72 GeV. We present a selection of feasibility studies for production quarkonia, open heavy-flavor mesons as well light-flavor hadrons in using LHCb ALICE detectors mode.
Using the LHCb and ALICE detectors in fixed-target mode at LHC offers unprecedented possibilities to study quark, gluon heavy-quark content of proton nuclei poorly known region high-momentum fractions. We review our projections for studies Drell-Yan, charm, beauty quarkonium production with both detector set-ups used various nuclear targets beams. Based on this, we show expected improvement determination charm PDFs as well discuss implication a better understanding cold-nuclear-matter...