A5002224741- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Black Holes and Theoretical Physics
- Theoretical and Computational Physics
- Microbial Natural Products and Biosynthesis
- Stochastic processes and statistical mechanics
- Cosmology and Gravitation Theories
- Bioactive Compounds and Antitumor Agents
- Cancer therapeutics and mechanisms
- Carbohydrate Chemistry and Synthesis
- Particle Detector Development and Performance
- Advanced Thermodynamics and Statistical Mechanics
- Computational Physics and Python Applications
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Glycosylation and Glycoproteins Research
- Quantum Electrodynamics and Casimir Effect
- Atomic and Subatomic Physics Research
- Plant Parasitism and Resistance
- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Advanced Harmonic Analysis Research
- Neutrino Physics Research
- Gas Dynamics and Kinetic Theory
Columbia University
2007-2023
University of Cape Town
2015-2016
Ruhr University Bochum
1993-2015
KLA (United States)
2015
Sejong University
2012
Lawrence Berkeley National Laboratory
2011
Centre National de la Recherche Scientifique
1991-2010
Laboratoire de Physique Théorique
2002
Université Paris-Sud
2002
Leipzig University
1997-1998
This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on structure and interactions gluon-dominated matter, with intent to articulate it broader nuclear community. It was commissioned by managements Brookhaven National Laboratory (BNL) Thomas Jefferson Accelerator Facility (JLab) objective presenting a summary scientific opportunities goals EIC as follow-up 2007 NSAC Long Range plan. document is culmination community-wide effort in following series workshops...
We construct the infinite-momentum wave function for arbitrary numbers of soft gluons in a heavy quark-antiquark, onium, state. The gluon part is constructed exactly within leading logarithmic and large-Nc limits. BFKL pomeron emerges when number densities are evaluated.
We demonstrate that the distinctive features of forward differential cross section diffractive leptoproduction a vector meson can be legitimately calculated in perturbative QCD terms light-cone qq\ifmmode\bar\else\textasciimacron\fi{} wave function and gluon distribution target. In particular, we calculate ${\mathit{Q}}^{2}$ nuclear dependence mesons estimate section. The production longitudinally polarized by virtual photons is predicted to dominant component, yielding behaving as...
Quark and gluon distributions in the light-cone wavefunction of a high energy hadron or nucleus are calculated saturation regime. One loop calculations performed explicitly using equivalence between parton distribution production that current-nucleon (nucleus) scattering. We argue that, except for some overall numerical factors, Weizsacker- Williams correctly gives physics wavefunction.
Multiplicity distributions, the dependence on $n$ of ${\ensuremath{\psi}}_{n}=\frac{{\ensuremath{\sigma}}_{n}}{\ensuremath{\sigma}}$, are discussed. Within framework Amati-Fubini-Stanghellini model, a cluster expansion for moments ${\ensuremath{\psi}}_{n}$ is derived. This same then derived as consequence asymptotic dominance inclusive reactions by an isolated, factorizable Regge pole. Such furnishes systematic way describing shape ${\ensuremath{\psi}}_{n}$. It argued that Poisson...
The authors review the ideas and manifestations of QCD coherence in high-energy reactions producing jets. They suggest experiments involving two-jet production, high-${p}_{\ensuremath{\perp}}\ensuremath{\gamma}$ production high-${p}_{\ensuremath{\perp}}W$ at hadronic colliders as ways to see stringlike effects. also a procedure for finding dip inclusive hadron spectrum jets those produced colliders. Simple explanations various effects are discussed, is idea local parton-hadron duality.
A technique introduced by Symanzik is used to derive a series of equations obeyed order in perturbation theory the structure functions ${W}_{1}$ and $\ensuremath{\nu}{W}_{2}$ entering cross section for inelastic electron scattering. These relate ${q}^{2}$, $\ensuremath{\nu}$, coupling-constant dependence manner reminiscent renormalization-group results Gell-Mann Low. The are compute leading logarithmic contribution fermions coupled pseudoscalar particles vector particles.
This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on structure and interactions gluon-dominated matter, with intent to articulate it broader nuclear community. It was commissioned by managements Brookhaven National Laboratory (BNL) Thomas Jefferson Accelerator Facility (JLab) objective presenting a summary scientific opportunities goals EIC as follow-up 2007 NSAC Long Range plan. document is culmination community-wide effort in following series workshops...
In this manuscript, we present a complete study of the Sudakov double logarithms resummation for various hard processes in $eA$ and $pA$ collisions small-$x$ saturation formalism. We first employ couple slightly different formalisms to perform one-loop analysis Higgs boson production process collisions, demonstrate that Sudakov-type arise as leading correction they can be systematically resummed addition usual resummation. further other such heavy quark pair back-to-back dijet through...
We consider a family of models describing the evolution under selection population whose dynamics can be related to propagation noisy traveling waves. For one particular model that we shall call exponential model, properties wave front calculated exactly, as well statistics genealogy population. One striking result is that, for this genealogical trees have same replicas in Parisi mean-field theory spin glasses. also find coalescence times along these grow like logarithm size. A...
Through an explicit calculation of massive scalar particle (e.g., Higgs boson) production in high energy pA collisions up to one-loop order, we demonstrate, for the first time, that Sudakov-type logarithms hard processes small-x saturation formalism can be systematically separated from logarithms. The generic feature Sudakov and all order resummation is derived. This shall provide us deep insights into understanding factorizations formalism. We further comment on phenomenological...
We demonstrate that hard dijet production via coherent inelastic diffraction is a promising channel for probing gluon saturation at the Electron-Ion Collider. By diffraction, we mean process in which two jets-a quark-antiquark pair generated by decay of virtual photon-are accompanied softer jet, emitted quark or antiquark. This can be described as elastic scattering an effective gluon-gluon dipole. The cross section takes factorized form, between factor and unintegrated ("Pomeron")...
We propose a phenomenological description for the effect of weak noise on position front described by Fisher-Kolmogorov-Petrovsky-Piscounov equation or any other traveling-wave in same class. Our scenario is based four hypotheses relevant mechanism diffusion front. parameter-free analytical predictions velocity front, its constant and higher cumulants agree with numerical simulations.
Cut vertices, a generalization of matrix elements composite operators, are introduced. Their renormalization is discussed. The Bogolubov-Parasiuk-Hepp-Zimmermann method cut vertices allows one to obtain the Wilson expansion where multiplied by singular functions appear rather than local operators times functions. A Callan-Symanzik equation for moments structure function in ${e}^{+}+{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadron} (p)+\mathrm{anything}$ derived. This valid all...
We consider a system made up of excitations neutral scalar field, φ, having λφ4 interaction term. Starting from an ensemble where the occupation number f is large, but λf small, we develop classical field theory description evolution toward equilibrium. A Boltzmann equation naturally emerges in this and show by explicit calculation that collision term same as coming elastic scattering. This shows equivalence system, at least to leading orders number.
Color quadrupoles have been found to be important in the proper description of observables sensitive small-x regime nuclei as well operator definition Weizsäcker–Williams gluon distribution. In this Letter, we derive evolution equation quadrupole and distribution without taking large Nc limit study properties both dilute saturation regime. We find that follows BFKL then saturates dense region due nonlinear terms. This leads us conclude should obey same geometrical behavior dipole inclusive...
We study the dijet azimuthal de-correlation in relativistic heavy ion collisions as an important probe of transverse momentum broadening effects a high energy jet traversing quark–gluon plasma. take into account both soft gluon radiation vacuum associated with Sudakov logarithms and PT-broadening QCD medium. find that are dominant at LHC, while medium can play role RHIC energies. This explains why LHC experiments have not yet observed sizable measurement correlations collisions. Future...
We investigate the P_{T}-broadening effects in dilepton production through photon-photon scattering heavy ion collisions. The QED multiple interaction effect with medium is found to be consistent recent observation of a low transverse momentum lepton pair from ATLAS Collaboration at LHC. further comment on magnetic broadening and point out number ways disentangle these two mechanisms. In particular, rapidity dependence provides unique probe effect.
The relationship and equivalence between the BFKL dipole equation kernels are investigated by means of explicit calculations in light-cone perturbation theory. A equation, equivalent to usual for interactions four reggeized gluons is given large Nc limit. leading trajectory four-gluon system bounded 2αp − 1 with αp pomeron intercept.