A.F. Żarnecki
A5022680664- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Superconducting Materials and Applications
- Astronomical Observations and Instrumentation
- Distributed and Parallel Computing Systems
- Particle Accelerators and Free-Electron Lasers
- Astronomy and Astrophysical Research
- Computational Physics and Python Applications
- Stellar, planetary, and galactic studies
- SAS software applications and methods
- Astrophysics and Cosmic Phenomena
- Astro and Planetary Science
- Building energy efficiency and sustainability
- Renewable energy and sustainable power systems
- CCD and CMOS Imaging Sensors
- Medical Imaging Techniques and Applications
- Pulsars and Gravitational Waves Research
- Scientific Computing and Data Management
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Neutrino Physics Research
University of Warsaw
2015-2024
National Centre for Nuclear Research
2009-2022
New York University
2022
Jagiellonian University
2000-2022
TU Dresden
2021-2022
University of Silesia in Katowice
2022
AGH University of Krakow
2022
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2014-2016
Institute of Experimental Physics of the Slovak Academy of Sciences
2010-2011
McGill University
2010
The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in 2030s. ILC addresses key questions for our current understanding of particle physics. It based proven technology. Its experiments will challenge Standard Model physics and provide window to look beyond it. This document brings story up date, emphasizing its strong motivation, readiness construction, opportunity it presents US community.
Neutrinos are the most elusive particles known. Heavier sterile neutrinos mixing with standard might solve mystery of baryon asymmetry universe. In this letter, we show that among all future energy frontier accelerators, muon colliders will provide farthest search reach for such mass ranges above $Z$ pole into multi-TeV regime. We compare performance electron same machine and briefly discuss complementarity in flavor space between two types accelerators.
High energy photon colliders (γγ,γe) are based on e - linear where high photons produced using Compton scattering of laser light electrons just before the interaction point. This paper is a part Technical Design Report collider TESLA. 1 Physics program, possible parameters and some technical aspects at TESLA discussed.
A bstract We present benchmarks for the Inert Doublet Model, a Two Higgs Model with dark matter candidate. They are consistent current constraints on direct detection, including most recent bounds from XENON1T experiment and relic density of matter, as well known collider low-energy limits. focus parameter choices that promise detectable signals at lepton colliders via pair-production H + − HA . For these we choose large variety benchmark points different kinematic features, leading to...
A bstract This paper presents results of the first full simulation study addressing prospects for observation long-lived particles (LLPs) with International Large Detector (ILD), operating at Linear Collider (ILC) $$ \sqrt{s} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> = 250 GeV. Neutral LLP production, resulting in a displaced vertex signature inside ILD’s time projection chamber (TPC), is considered. We focus on...
We investigate the prospect of discovering Inert Doublet Model scalars at CLIC. As signal processes, we consider pair-production inert scalars, namely e+e- -> H+H- and AH, followed by decays charged H+ neutral A into leptonic final states missing transverse energy. focus on signatures with two muons or an electron a muon pair in state. number selected benchmark scenarios that cover range possible collider IDM are considered. For suppression SM background same visible signature, multivariate...
A bstract Neutrinos are among the most mysterious particles in nature. Their mass hierarchy and oscillations, as well their antiparticle properties, being intensively studied experiments around world. Moreover, many models of physics beyond Standard Model, baryon asymmetry or dark matter density Universe explained by introducing new species neutrinos. Among others, heavy neutrinos Dirac Majorana nature were proposed to solve open questions High Energy Physics. Such with masses above...
A bstract In this paper we investigate how well the nature of heavy neutral leptons can be determined at a future lepton collider, after its potential discovery. Considered in simplified model are prompt decays neutrino mass range from 100 GeV to 10 TeV. We study event selection and application multivariate analyses determine whether such newly discovered particle is Dirac or Majorana nature. Combining charge kinematic variables, find that neutrino, it particle, 95% C.L. almost whole...
Background This study investigated the effects of comicronised fenofibrate in patients with dyslipidemia and polymetabolic syndrome X. Design After a 6‐week dietary run‐in phase, 37 male eligible on lipid criteria entered 12‐week treatment phase consisting diet plus one capsule daily containing 200 mg (Lipanthyl ® ). Results A significant reduction plasma concentrations total cholesterol, LDL cholesterol triglyceride was observed after 4, 8 12 weeks fenofibrate. The improvement atherogenic...
Two-particle azimuthal correlations have been measured in neutral current deep inelastic ep scattering with virtuality Q2> 5 GeV2 at a centre-of-mass energy $$ \sqrt{s} = 318 GeV recorded the ZEUS detector HERA. The of charged particles range laboratory pseudorapidity −1.5 < η 2.0 and transverse momentum 0.1 pT< 5.0 event multiplicities Nch up to six times larger than average 〈Nch〉 ≈ 5. two-particle terms angular observables cn{2} 〈〈cosnΔφ〉〉, where n is between 1 4 ∆φ relative angle two...
There are many possibilities for new physics beyond the Standard Model that feature non-standard Higgs sectors. These may introduce sources of CP violation, and there be mixing between multiple bosons or other scalar bosons. Alternatively, a composite state, even no at all. scenarios have important implications collider as well cosmology, understanding their phenomenology is essential full comprehension electroweak symmetry breaking. This report discusses most relevant theories which go its...
Abstract One of the important goals proposed future $$\hbox {e}^{+}\hbox {e}^{-}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mtext>e</mml:mtext><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mtext>e</mml:mtext><mml:mo>-</mml:mo></mml:msup></mml:mrow></mml:math> collider experiments is search for dark matter particles using different experimental approaches. The most general approach based on mono-photon signature, which expected when production invisible...
A summary is presented of the workshop "top physics at linear colliders" that was held IFIC Valencia from 30th June to 3rd July 2015. We present an up-to-date status report studies into potential for top quark lepton colliders with energy reach exceeds pair production threshold, a focus on collider projects ILC and CLIC. This shows such can offer very competitive determinations properties (mass, width) its interactions other Standard Model particles, in particular electroweak gauge bosons...
Many theories predict the existence of very heavy compact objects, that in terms sizes would belong to realms nuclear or atomic physics, but masses could extend macroscopic world, reaching kilograms, tonnes, more. If they exist, it is likely reach our planet with high speeds and cross atmosphere. Because their mass-to-size ratio huge energy, many cases, leave behind a trail form sound seismic waves, etches, light transparent media. Here we show results search for such objects visual...
The physics program of the Higgs factory will focus on measurements 125 GeV boson, with Higgs-strahlung process being dominant production channel at 250 GeV. However, extra light scalars is still not excluded by existing experimental data, provided their coupling to gauge bosons sufficiently suppressed. Fermion couplings such a scalar could also be very different from SM predictions leading non-standard decay paterns. Considered in presented study sensitivity future experiments direct...
The azimuthal correlation angle, $\Delta\phi$, between the scattered lepton and leading jet in deep inelastic $e^{\pm}p$ scattering at HERA has been studied using data collected with ZEUS detector a centre-of-mass energy of $\sqrt{s} = 318 \;\mathrm{GeV}$, corresponding to an integrated luminosity $326 \;\mathrm{pb}^{-1}$. A measurement cross sections laboratory frame was made fiducial region photon virtuality $10 \;\mathrm{GeV}^2 < Q^2 350 \;\mathrm{GeV}^2$, inelasticity $0.04 y 0.7$,...
Combined HERA data on charm production in deep-inelastic scattering have previously been used to determine the charm-quark running mass $m_c(m_c)$ MSbar renormalisation scheme. Here, same are as a function of photon virtuality $Q^2$ evaluate at different scales one-loop order, context next-to-leading order QCD analysis. The scale dependence is found be consistent with expectations.
Abstract A new measurement of inclusive-jet cross sections in the Breit frame neutral current deep inelastic scattering using ZEUS detector at HERA collider is presented. The data were taken years 2004–2007 a centre-of-mass energy $$318\,\,\textrm{GeV}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>318</mml:mn> <mml:mspace/> <mml:mtext>GeV</mml:mtext> </mml:mrow> </mml:math> and correspond to an integrated luminosity $$347\,\,\textrm{pb}^{-1}$$...
We investigate the phenomenology of light charged and neutral scalars in Inert Doublet Model at future $e^+ e^-$ colliders with center mass energies 0.5 1 TeV, integrated luminosity 500~fb$^{-1}$. The analysis covers two production processes, $e^{+}e^{-} \rightarrow H^{+}H^{-}$ $e^{+}e^{-}\rightarrow AH$, consists signal selections, cross section determinations as well dark matter measurements. Several benchmark points are studied focus on $H^{\pm} W^{\pm}H$ $A ZH$ decays. It is concluded...
The ejecta composition is an open question in gamma-ray bursts (GRB) physics. Some GRBs possess a quasi-thermal spectral component the time-resolved analysis, suggesting hot fireball origin. Others show featureless non-thermal spectrum known as "Band" function, consistent with synchrotron radiation origin and that jet Poynting-flux-dominated at central engine likely emission region well. There are also showing sub-dominant thermal dominant hybrid composition. Here we report extraordinarily...