A5105697906- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Nuclear reactor physics and engineering
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Pulsars and Gravitational Waves Research
- Cosmology and Gravitation Theories
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Statistical Methods and Bayesian Inference
- Black Holes and Theoretical Physics
- Stochastic processes and statistical mechanics
- Computational Physics and Python Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Muon and positron interactions and applications
- Atomic and Subatomic Physics Research
- Crystallography and Radiation Phenomena
- Radiation Detection and Scintillator Technologies
- Advanced Chemical Physics Studies
- Radiation Effects in Electronics
- Theoretical and Computational Physics
- Superconducting Materials and Applications
- Cellular Automata and Applications
Aligarh Muslim University
2020-2025
European Organization for Nuclear Research
2012-2025
A. Alikhanyan National Laboratory
2015-2024
Universidad Nacional Autónoma de México
2011-2024
University of Bergen
2015-2024
Petersburg Nuclear Physics Institute
2014-2023
COMSATS University Islamabad
2013-2023
Max Planck Institute for Physics
2023
Budker Institute of Nuclear Physics
2020
Center for Research and Advanced Studies of the National Polytechnic Institute
2020
Proton–nucleus (p+A) collisions have long been recognized as a crucial component of the physics program with nuclear beams at high energies, in particular for their reference role to interpret and understand nucleus–nucleus data well potential elucidate partonic structure matter low parton fractional momenta (small-x). Here, we summarize main motivations that make proton–nucleus run decisive ingredient successful heavy-ion Large Hadron Collider (LHC) present unique scientific opportunities...
We make predictions for the cross sections of coherent photoproduction $\ensuremath{\rho},\phantom{\rule{0.28em}{0ex}}\ensuremath{\phi},\phantom{\rule{0.28em}{0ex}}J/\ensuremath{\psi},\phantom{\rule{0.28em}{0ex}}\ensuremath{\psi}(2S)$, and $\mathrm{\ensuremath{\Upsilon}}(1S)$ mesons in Pb-Pb ultraperipheral collisions (UPCs) at $\sqrt{{s}_{NN}}=5.02\phantom{\rule{0.28em}{0ex}}\mathrm{TeV}$ kinematics run 2 Large Hadron Collider extending approaches successfully describing available UPC data...
We present predictions for the J/psi and rho meson production in heavy ion ultraperipheral collisions (UPC) current energy 2.76 TeV at LHC. Both total cross sections with neutron emission from one or both nuclei are presented. also analyse RHIC photoproduction data emphasize importance of these to test model nucleus break up UPC.
We consider $$J/\psi $$ photoproduction in ion–ion ultraperipheral collisions (UPCs) at the LHC and RHIC coherent incoherent quasielastic channels with without accompanying forward neutron emission analyze role of nuclear gluon shadowing small $$x$$ , $$x=10^{-4}{-}10^{-2}$$ these processes. find that despite good agreement between large ALICE data channel, leading twist approximation predicts amount suppression which is by approximately a factor $$1.5$$ exceeds seen data. hypothesize part...
Using the data on coherent $J/\psi$ photoproduction in Pb-Pb ultraperipheral collisions (UPCs) obtained Runs 1 and 2 at Large Hadron Collider (LHC), we determined with a good accuracy nuclear suppression factor of $S_{Pb}(x)$ wide range momentum fraction $x$, $10^{-5} \leq x 0.04$. In small-$x$ region $x < 10^{-3}$, our $\chi^2$ fit favors flat form $S_{Pb}(x) \approx 0.6$ approximately 5% for $x=6 \times 10^{-4} - 10^{-3} $ 25% error $x=10^{-4}$. At same time, uncertainties do not exclude...
We argue that with an increase of the collision energy, elastic photoproduction ρ mesons on nuclei becomes affected by significant cross section photon inelastic diffraction into large masses, which results in sizable nuclear shadowing correction to σγA→ρA and reduced effective ρ-nucleon section. take these effects account combining vector meson dominance model, we upgrade include contribution high-mass fluctuations according QCD constraints, Gribov–Glauber approximation for shadowing, where...
By using the theoretical approaches describing well available data on $t$-integrated coherent photoproduction of light and heavy vector mesons in Pb-Pb ultraperipheral collisions (UPCs) at Large Hadron Collider (LHC) Run 1, we calculate momentum transfer distributions for this process $\rho$ $J/\psi$ kinematics 2 LHC. We demonstrate that nuclear shadowing not only suppresses absolute value cross sections, but also shifts toward smaller values $|t|$. This result can be interpreted as a...
We calculate the rapidity distribution and total cross section of coherent incoherent $\ensuremath{\rho}$ production in heavy ion ultraperipheral collisions at ${\sqrt{s}}_{\mathrm{NN}}=130\mathrm{GeV}$ using generalized vector dominance model Gribov-Glauber approach. find \ensuremath{\rho}-production ${\ensuremath{\sigma}}_{\mathrm{coh}}=490\mathrm{mb}$ compared to ${\ensuremath{\sigma}}_{\mathrm{coh}}=370\ifmmode\pm\else\textpm\fi{}170\ifmmode\pm\else\textpm\fi{}80\mathrm{mb}$ recently...
Based on accurate calculations of the flux equivalent photons proton and heavy nuclei pQCD framework for gluon distribution in nuclei, we analyze rapidity momentum transfer distributions coherent J/ψ photoproduction ultraperipheral proton-Pb collisions at LHC. We demonstrate that unlike case proton-proton UPCs marred by certain theoretical uncertainties experimental limitations, after a cut excluding region small transfers, offer clean way to study down x ≈ 10−5. Our analysis shows an...
Using the general notion of cross section fluctuations in hadron--nucleus scattering at high energies, we derive an expression for incoherent $J/\psi$ photoproduction on heavy nuclei $d\sigma_{\gamma A \to J/\psi Y}/dt$, which includes both elastic p p}/dt$ and proton-dissociation Y}/dt$ target nucleons. We find that with good accuracy, can be expressed as a product sum sections, have been measured HERA, common nuclear shadowing factor, is calculated using leading twist model. Our prediction...
Existing cross-section data for 1p-shell knockout in the reaction 12C(e,e'p) - as obtained under different kinematic conditions are shown to be mutually consistent, apart from a recent measurement performed Mainz. New have been collected at Amsterdam Pulse Stretcher that confirm normalization of older measurements. An analysis world's has yielded precise values spectroscopic factor and 1s-shell 12C. These used evaluate transparency 12C nucleus protons separately on basis high-energy taken...
The problems and uncertainties in the search for color transparency at intermediate ${\mathrm{Q}}^{2}$ are considered. We show that conventional (optical) model [distorted wave impulse approximation (DWIA)] predicts a substantial change of transparency, T, with kinematics NE-18 (e,e\ensuremath{'}p) experiment, while phenomenon may lead to nearly independent T. In case A(p,2p) reaction we demonstrate optical well describes 1 GeV data but not observed higher energies. find also DWIA (with or...
The FELIX collaboration had proposed the construction of a full-acceptance detector for LHC. primary mission was study QCD: to provide comprehensive and definitive observations very broad range strong-interaction processes. This document contains an extensive discussion this physics menu. In further paper will be reviewed.
We evaluate the cross sections for production of vector mesons in exclusive ultraperipheral proton-ion collisions at LHC. find that rates are high enough to study energy and momentum transfer dependence - rho,phi, J/psi, Upsilon photoproduction gamma p scattering a wide range extending measurements which were performed HERA, providing new information about interplay soft hard physics diffraction. Also, we calculate contributions meson yield due off nuclear target by photons emitted proton....
We analyze the pattern of onset complete absorption (the black limit) in high energy hadron-hadron collisions. The limit arises due to hard and soft interaction dynamics as a function impact parameters b. Both mechanisms provide universal dependence partial amplitude elastic hadron- hadron scattering on parameter ${\bf b}$ result radius proportional $\ln (s/s_0)$. find that with increase collision energies interactions lead faster range where wave amplitudes are approaching unitarity limit....