A5068651313- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Electron and X-Ray Spectroscopy Techniques
- Crystallography and Radiation Phenomena
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Advanced Data Storage Technologies
- Inorganic Fluorides and Related Compounds
- Nuclear physics research studies
- Black Holes and Theoretical Physics
- Quantum, superfluid, helium dynamics
- Cold Fusion and Nuclear Reactions
- Photocathodes and Microchannel Plates
- Pulsars and Gravitational Waves Research
- Atomic and Molecular Physics
Rzeszów University
2015-2024
Institute of Physics
2014-2024
Pennsylvania State University
2023
Institute of Nuclear Physics, Polish Academy of Sciences
2014-2023
AGH University of Krakow
2023
University of Kansas
2023
Jagiellonian University
2023
University of Warsaw
2023
Rzeszów University of Technology
2022
Centre de Physique Théorique
2019
The goal of this report is to give a comprehensive overview the rich field forward physics, with special attention topics that can be studied at LHC.The starts presenting selection Monte Carlo simulation tools currently available, chapter 2, then enters phenomenology QCD low, 3, and high, 4, momentum transfer, while unique scattering conditions central exclusive production are analyzed in 5.The last two experimental topics, Cosmic Ray Heavy Ion physics presented 6 7 respectively.Chapter 8...
We discuss production of two pairs $c\overline{c}$ within a simple formalism double-parton scattering. Surprisingly very large cross sections, comparable to single-parton scattering single pair contribution, are predicted for LHC energies. Both the total inclusive section as function energy and differential distributions in rapidity transverse momentum charm quark/antiquark well some correlation $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$ shown. have presented results commonly used factorized...
We investigate different methods to incorporate the effect of photons in hard processes. compare two approaches used for calculating cross sections two-photon $pp\ensuremath{\rightarrow}{l}^{+}{l}^{\ensuremath{-}}X$ process. In one photon is treated as a collinear parton proton. second approach recently proposed ${k}_{T}$ factorization method used. discuss how results model depend on initial condition QCD evolution and an approximate treatment where excluded from combined QCD-QED evolution....
We evaluate the unintegrated gluon distribution of proton starting from a parametrization color dipole cross section including DGLAP evolution and saturation effects. To this end, we perform Fourier-Bessel transform $\sigma(x,r)/\alpha(r)$. At large transverse momentum gluons match so-obtained to logarithmic derivative collinear distribution. check our approach by calculating structure function $F_L(x,Q^2)$ finding good agreement with HERA data.
$W^+ W^-$ production is one of the golden channels for testing Standard Model as well searches beyond Model. We discuss many new subleading processes inclusive pairs generally not included in litterature so far. focus mainly on photon-photon induced processes. include elastic-elastic, elastic-inelastic, inelastic-elastic and inelastic-inelastic contributions. also calculate contributions with resolved photons including partonic substructure virtual photon. Predictions total cross section...
We discuss and compare different approaches to include gluon transverse momenta for heavy quark-antiquark pair production. The correlations in azimuthal angle quark, antiquark are studied detail. results illustrated with the help of unintegrated distribution functons (UGDF) from literature. obtained on-shell off-shell matrix elements kinematics quantify where these effects negligible they essential. concentrate on region asymmetric charm quark antiquark. Most UGDFs lead this corner phase...
We discuss production of nonphotonic electrons in proton-proton scattering at the relativistic heavy ion collider. The distributions rapidity and transverse momentum charm bottom quarks/antiquarks are calculated ${k}_{t}$-factorization approach. use Kwieci\ifmmode \acute{n}\else \'{n}\fi{}ski unintegrated parton Ivanov-Nikolaev gluon distribution. hadronization quarks is done by means Peterson Braaten et al. fragmentation functions. semileptonic decay functions found fitting recent data...
We discuss diffractive production of open charm and bottom mesons at the LHC. The differential cross sections for single- central-diffractive mechanisms $c\bar c$ $b\bar b$ pair are calculated in framework Ingelman-Schlein model corrected absorption effects. In this approach one assumes that pomeron has a well defined partonic structure, hard process takes place pomeron-proton or proton-pomeron (single diffraction) pomeron-pomeron (central processes. Here, leading-order gluon-gluon fusion...
We discuss a scenario in which the diphoton enhancement at ${M}_{\ensuremath{\gamma}\ensuremath{\gamma}}=750\text{ }\text{ }\mathrm{GeV}$, observed by ATLAS and CMS collaborations, is neutral technipion ${\stackrel{\texttildelow{}}{\ensuremath{\pi}}}^{0}$. consider two distinct minimal models for dynamical electroweak symmetry breaking. In first one, two-flavor vectorlike technicolor (VTC) model, we assume that two-photon fusion dominant production mechanism. include...
At high energies the gluon-gluon fusion is dominant mechanism of $c\overline{c}$ production. This process was calculated in next-to-leading-order collinear as well ${k}_{t}$-factorization approaches past. We show that present knowledge gluon distributions does not allow one to make precise predictions for production at LHC, particular forward rapidities. In this paper we study pairs including several subleading mechanisms. includes $gg\ensuremath{\rightarrow}Q\overline{Q}$,...
We calculate the cross section for $p p \to W^{+} W^-$ in recently developed $k_{\rm T}$-factorisation approach, including transverse momenta of virtual photons. focus on processes with single and double proton dissociation. First we discuss gap survival parton level as due to emission extra jet. Both role valence sea contributions is discussed. The hadronisation remnants performed {PYTHIA 8} string fragmentation model, assuming a simple quark-diquark model proton. Highly excited remnant...
We discuss inclusive production of open charm mesons in proton-proton scattering at the BNL RHIC. The calculation is performed framework ${k}_{t}$-factorization approach which effectively includes higher-order pQCD corrections. Different models unintegrated gluon distributions (UGDF) from literature are used. focus on UGDF favored by LHC data and a new up-to-date parametrizations based HERA collider deep-inelastic high-precision data. Results compared to next-to-leading order collinear...
A bstract We discuss the production of $$ t\overline{t} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>t</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> quark-antiquark pairs in proton-proton collisions via γγ fusion mechanism. include topologies which both protons stay intact or one even them undergo dissociation. The calculations are performed within k T -factorisation approach, including transverse momenta intermediate photons. Photon fluxes associated...
A bstract We discuss production of W + − pairs in proton-proton collisions induced by two-photon fusion including, for a first time, transverse momenta incoming photons. The unintegrated inelastic fluxes (related to proton dissociation) photons are calculated based on modern parametrizations deep structure functions broad range their arguments ( x and Q 2 ). In our approach we can get separate contributions different helicities states. Several one- two-dimensional differential distributions...
A bstract We study the exclusive diffractive $$ c\overline{c} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>c</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> photoproduction in ultraperipheral pA collisions. The formalism makes use of off-diagonal generalizations unintegrated gluon distribution, so-called generalized transverse momentum dependent distributions (GTMDs). present two different formulations. first one is based directly on GTMD...
We discuss the single-diffractive production of cc pairs and charmed mesons at LHC. For a first time we propose k t -factorization approach to diffractive processes. The transverse momentum dependent parton distributions are obtained from standard (collinear) used in literature. In this calculation pomeron is neglected with respect partons entering hard process. also perform evaluation cross sections LHC using distributions. results new compared those collinear one. Significantly larger...
We discuss photon-photon fusion mechanisms of dilepton production in proton-proton collisions with rapidity gap the main detector and one forward proton detectors. This is relevant for LHC measurements by ATLAS+AFP CMS+PPS. Transverse momenta intermediate photons are taken into account photon fluxes expressed terms electromagnetic form factors structure functions. Differential distributions $\xi_{1/2}$, $M_{ll}$, $Y_{ll}$, $p_{t,ll}$, $M_R$ %pamietac wyjasnic M_R w tekscie shown competition...
Correlation of charm-quark–charm-antiquark in γp scattering are calculated the kt-factorization approach. We apply different unintegrated gluon distributions (uGDF) used literature. The results our calculations compared with very recent experimental from FOCUS Collaboration. CCFM uGDF developed recently by Kwieciński et al. gives a good description data. New observables suggested for future studies. Predictions and perspectives HERA energies presented.
We calculate differential cross sections for Higgs boson and/or two-photon production from intermediate (virtual) within the formalism of $k_t$-factorization. The off-shell $g^* g^* \to H$ matrix elements are used. compare results obtained with infinite top fermion (quark) mass and finite taken into account. latter effect is rather small. different unintegrated gluon distributions literature. Two methods In first method produced in $2 1$ $g g $k_t$-factorization approach then isotropic decay...
We propose a new experimental method to probe the photon parton distribution function inside proton (photon PDF) at LHC energies. The is based on measurement of dilepton production from $\gamma p\rightarrow\ell^+\ell^-+X$ reaction in proton--lead collisions. These conditions guarantee clean environment, both terms reconstruction final state and possible background. firstly calculate cross sections for this process with collinear PDFs, where we identify optimal choice scale, analogy deep...
We discuss diffractive dissociation of gluons into heavy quark pairs. The particular mechanism is similar to the virtual photons quarks, which drives deep inelastic production charm in low-mass diffraction, or large $\beta$-region. There, it can be understood, with some reservations, terms a valence content Pomeron. amplitude for $g p \to Q \bar p$ derived impact parameter and momentum space. cross section single $p X$ calculated as convolution elementary gluon distribution proton....
We discuss charm production at the LHC. The of single pairs is calculated in kt-factorization approach. use Kimber-Martin-Ryskin unintegrated gluon distributions proton. hadronization included with help Peterson fragmentation functions. Transverse momentum and pseudorapidity charmed mesons are presented compared to recent results ALICE, LHCb ATLAS collaborations. Furthermore we two within a simple formalism double-parton scattering (DPS). Surprisingly large cross sections, comparable...
We calculate several differential distributions for diffractive dijets production in $e p \to e' {\rm jet \, jet} p$ the pQCD dipole approach using off diagonal unintegrated gluon (GTMDs). Different models from literature are used. concentrate on contribution exclusive $q \bar q$ dijets. Results of our calculations compared to H1 and ZEUS data, including specific experimental cuts calculations. In general, except one GTMD, results below HERA data. The considered mechanism is expected gives a...