A5063103174- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Cosmology and Gravitation Theories
- Superconducting Materials and Applications
- Distributed and Parallel Computing Systems
- Cold Atom Physics and Bose-Einstein Condensates
- Numerical methods in inverse problems
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Theoretical and Computational Physics
- Advanced Mathematical Physics Problems
- Electromagnetic Simulation and Numerical Methods
- Particle Detector Development and Performance
- Quantum, superfluid, helium dynamics
- Physics of Superconductivity and Magnetism
- Ionosphere and magnetosphere dynamics
- Material Dynamics and Properties
- Reservoir Engineering and Simulation Methods
- Meteorological Phenomena and Simulations
- Pulsars and Gravitational Waves Research
- Winter Sports Injuries and Performance
- Advanced Thermodynamics and Statistical Mechanics
- Numerical methods for differential equations
- Advanced X-ray Imaging Techniques
University of Jyväskylä
2016-2025
Helsinki Institute of Physics
2016-2025
University of Helsinki
2016-2025
Institute of Modern Physics
2024
Chinese Academy of Sciences
2024
University of Chinese Academy of Sciences
2024
Lund University
2024
Universidade de Santiago de Compostela
2020-2023
National Centre for Nuclear Research
2020-2023
New York University
2022
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...
The physics programme and the design are described of a new collider for particle nuclear physics, Large Hadron Electron Collider (LHeC), in which newly built electron beam 60 GeV, up to possibly 140 energy collides with intense hadron beams LHC. Compared HERA, kinematic range covered is extended by factor twenty negative four-momentum squared, $Q^2$, inverse Bjorken $x$, while luminosity $10^{33}$ cm$^{-2}$s$^{-1}$ LHeC projected exceed integrated HERA two orders magnitude. devoted an...
This report is based on a ten-week program Gluons and the quark sea at high-energies, which took place Institute for Nuclear Theory (INT) in Seattle Fall 2010. The principal aim of was to develop sharpen science case an Electron-Ion Collider (EIC), facility that will be able collide electrons positrons with polarized protons light heavy nuclei high energies, offering unprecedented possibilities in-depth studies quantum chromodynamics (QCD). organized around following four major themes: (i)...
We study the jet quenching parameter qˆ in initial pre-equilibrium stages of heavy-ion collisions using QCD kinetic theory description anisotropic quark-gluon plasma. This allows us to smoothly close gap literature between early glasma stage collision and onset hydrodynamics. find that pre-hydrodynamic evolution during bottom-up scenario shows little sensitivity conditions, energies models transverse momentum cutoff. also observe that, similarly case, is enhanced along beam axis as compared...
The initial stages of relativistic heavy ion collisions are studied numerically in the framework a $(2+1)$-dimensional classical Yang-Mills theory. We calculate energy and number densities momentum spectra produced gluons. model is also applied to noncentral collisions. numerical results discussed light RHIC measurements multiplicity other theoretical calculations. Some problems present approach pointed out.
We study single inclusive hadron production in proton-proton and proton-nucleus collisions the CGC framework. The parameters calculation are determined solely by standard nuclear geometry electron-proton deep inelastic scattering data, which fit using running coupling BK equation. show that it also is possible to obtain a good of HERA cross section without an anomalous dimension initial condition. argue one must consistently use proton transverse area as measured high virtuality probe DIS...
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 show that the enhancement of saturation scale in large nuclei relative to proton is significantly influenced by effects quantum evolution and impact parameter dependence dipole cross sections high energy QCD. demonstrate there a strong $A$ diffractive deeply inelastic scattering discuss its sensitivity measurement recoil nucleus.
We compute cross sections for incoherent and coherent diffractive $J/\ensuremath{\Psi}$ production in ultraperipheral nucleus-nucleus proton-nucleus collisions using two different dipole models fitted to HERA data. obtain a reasonably good description of the available ALICE data present our prediction section. also find that, while normalization section depends quite strongly on model vector meson wave function used, rapidity dependence is very well constrained.
We present the first numerical solution to next-to-leading-order Balitsky-Kovchegov equation in coordinate space large-${N}_{\mathrm{c}}$ limit. In addition dipole operator, we also solve evolution of ``conformal dipole'' for which conformal invariance breaking double logarithmic term is absent from equation. The corrections are shown slow down evolution. show that depends strongly on details initial condition and not positive definite with all conditions relevant phenomenological applications.
We determine the distribution of linearly polarized gluons a dense target at small x by solving Balitsky-Jalilian-Marian-Iancu-McLerran-Weigert-Leonidov-Kovner rapidity evolution equations. From these solutions, we estimate amplitude ∼cos2ϕ azimuthal asymmetries in deep inelastic scattering dijet production high energies. find sizable long-range with magnitude range v_{2}=⟨cos2ϕ⟩∼10%.
We solve the Balitsky-Kovchegov evolution equation at next-to-leading order accuracy including a resummation of large single and double transverse momentum logarithms to all orders. numerically determine an optimal value for constant under logarithm that enables maximal amount full NLO result in resummation. When this is used, contribution from ${\ensuremath{\alpha}}_{\mathrm{s}}^{2}$ terms without found be small saturation scales dipoles. Close initial conditions relevant phenomenological...
Inclusive production of $J/\psi$ mesons, especially at forward rapidities, is an important probe small-x gluons in protons and nuclei. In this paper we re-evaluate the cross sections Color Glass Condensate framework, where process described by a large x gluon from splitting into quark pair eikonally interacting with target proton or nucleus. Using standard collinear distribution for up to date dipole section fitted HERA data describe achieve rather good description proton-proton collisions,...
We examine the origins of azimuthal correlations observed in high energy proton-nucleus collisions by considering simple example scattering uncorrelated partons off color fields a large nucleus. demonstrate how physics fluctuating glass condensate (CGC) effective theory generates these multiparticle and compute corresponding Fourier coefficients v_n within different CGC approximation schemes. discuss detail qualitative quantitative differences between will show recently introduced field...
We perform the first dipole picture fit to HERA inclusive cross section data using full next-to-leading order (NLO) impact factor combined with an improved Balitsky-Kovchegov evolution including dominant effects beyond leading logarithmic accuracy at low $x$. find that three different formulations of equation have been proposed in recent literature result a very similar description data, and robust predictions for future deep inelastic scattering experiments. evidence pointing towards...
We compute the heavy quark momentum diffusion coefficient <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>κ</a:mi></a:math> using QCD kinetic theory for a system going through bottom-up isotropization in initial stages of ion collision. find that values <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>κ</c:mi></c:math> are within 30% from thermal at same energy density. When matching other quantities we observe considerably larger...
The initial energy density produced in an ultrarelativistic heavy ion collision can, the color glass condensate framework, be factorized into a product of integrated gluon distributions nuclei. Although this is well defined without any infrared cutoff besides saturation scale, it apparently logarithmically ultraviolet divergent. We argue that divergence not physically meaningful and does affect behavior system at finite proper time.
We derive a high energy factorization theorem for inclusive gluon production in $\mathrm{A}+\mathrm{A}$ collisions. Our factorized formula resums (i) all-order leading logarithms $({g}^{2}\mathrm{ln}(1/{x}_{1,2}){)}^{n}$ of the incoming parton momentum fractions, and (ii) all contributions $(g{\ensuremath{\rho}}_{1,2}{)}^{n}$ that are enhanced when color charge densities two nuclei order inverse coupling---${\ensuremath{\rho}}_{1,2}\ensuremath{\sim}{g}^{\ensuremath{-}1}$. The resummed...