J. T. Sobczyk
A5037498646- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Algebraic structures and combinatorial models
- Muon and positron interactions and applications
- Black Holes and Theoretical Physics
- Particle accelerators and beam dynamics
- Advanced Topics in Algebra
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Nonlinear Waves and Solitons
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- Cosmology and Gravitation Theories
- Superconducting Materials and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Scientific Research and Discoveries
- Noncommutative and Quantum Gravity Theories
- Advanced Algebra and Geometry
- Electron and X-Ray Spectroscopy Techniques
University of Wrocław
2016-2025
University of Bern
2023
Albert Einstein College of Medicine
2023
Eötvös Loránd University
2023
Boston University
2013-2023
Duke University
2009-2023
Universidad Autónoma de Madrid
2018-2023
University of California, Irvine
2013-2023
Colorado State University
2021-2023
Lancaster University
2021
Final-state interaction (FSI) effects are discussed in the context of Monte Carlo simulations neutrino-nucleus interactions. A role formation time is explained and several models describing this effect compared. Various observables which sensitive to FSI reviewed including pion-nucleus hadron yields backward hemisphere. NuWro neutrino event generator described its ability understand neutral current ${\ensuremath{\pi}}^{0}$ production data $\ensuremath{\sim}1$ GeV flux experiments demonstrated.
Important open questions are still present in fundamental Physics and Cosmology, like the nature of Dark Matter, matter-antimatter asymmetry validity Standard Model particle interactions. Addressing these requires a new generation massive detectors to explore subatomic astrophysical worlds. ICARUS T600 is first large mass (760 tons) example able combine imaging capabilities old famous ``bubble chamber'' with excellent energy measurement huge electronic detectors. now operates at Gran Sasso...
This document reports on a series of experimental and theoretical studies conducted to assess the astro-particle physics potential three future large-scale particle detectors proposed in Europe as next generation underground observatories. The apparatus employ different and, some extent, complementary detection techniques: GLACIER (liquid Argon TPC), LENA scintillator) MEMPHYS (\WC), based use large mass liquids active media. results these are presented along with critical discussion...
A careful reanalysis of both Argonne National Laboratory and Brookhaven data for weak single pion production is done. We consider deuteron nuclear effects normalization (flux) uncertainties in experiments. demonstrate that these two sets are good agreement. For the dipole parametrization ${C}_{5}^{A}({Q}^{2})$, we obtain ${C}_{5}^{A}(0)=1.19\ifmmode\pm\else\textpm\fi{}0.08$, ${M}_{A}=0.94\ifmmode\pm\else\textpm\fi{}0.03\text{ }\text{ }\mathrm{GeV}$. As an application present discussion...
Recent experimental results and developments in the theoretical treatment of neutrino-nucleus interactions energy range 1–10 GeV are discussed. Difficulties extracting neutrino-nucleon cross sections from scattering data explained significance understanding nuclear effects for neutrino oscillation experiments is stressed. Detailed discussions status two-body current contribution kinematic region dominated by quasielastic specific features partonic weak DIS presented.
Charged pion production via charged-current ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ interactions on plastic scintillator (CH) is studied using the MINERvA detector exposed to NuMI wideband neutrino beam at Fermilab. Events with hadronic invariant mass $W<1.4\text{ }\text{ }\mathrm{GeV}$ and $W<1.8\text{ are selected in separate analyses: lower $W$ cut isolates single production, which expected occur primarily through $\mathrm{\ensuremath{\Delta}}(1232)$ resonance, while results from higher...
NUISANCE is an open source C++ framework which facilitates detailed studies of neutrino interaction cross-section models implemented in Monte Carlo event generators. It provides a host automated methods to perform comparisons multiple generators published measurements and each other. External reweighting libraries are used allow the end-user evaluate impact model parameters variations with data, or tune generator predictions arbitrary dataset combinations. The design modular focusses on...
Final-state kinematic imbalances are measured in mesonless production of ν_{μ}+A→μ^{-}+p+X the MINERvA tracker. Initial- and final-state nuclear effects probed using direction μ^{-}-p transverse momentum imbalance initial-state struck neutron. Differential cross sections compared to predictions based on current approaches medium modeling. These models underpredict section at intermediate intranuclear transfers that generally exceed Fermi momenta. As neutrino interaction need correctly...
MINERvA presents a new analysis of neutrino induced quasielastic-like interactions in hydrocarbon tracking target. We report double-differential cross section using the muon transverse and longitudinal momentum. In addition, differential sections as function square four-momentum transferred energy are calculated quasielastic hypothesis. Finally, an deposited near interaction vertex is presented. These results compared to modified GENIE predictions well NuWro prediction. All use dataset...
Neutrino cross section and oscillation measurements depend critically on modeling of hadronic final state interactions (FSI). Often, this is one the largest components uncertainty in a measurement. This because difficulty strong nuclei consistent quantum-mechanical framework. FSI models are most often validated using hadron-nucleus data which introduces further uncertainties. The alternative to use transparency where hadron starts propagating from inside nucleus probability interaction...
A model is proposed to describe pairs or triples of nucleons ejected from nucleus as a result Meson Exchange Current neutrino interaction. The can be easily implemented in Monte Carlo event generators. It provide help identifying true charge current quasielastic events and allow for better determination the systematic error energy reconstruction oscillation experiments
A study of charged-current muon neutrino scattering on hydrocarbon in which the final state includes a and proton no pions is presented. Although this signature has topology quasielastic from neutrons, event sample contains contributions both inelastic processes where are absorbed nucleus. The analysis accepts events with production angles up to 70$^{\circ}$ kinetic energies greater than 110 MeV. extracted cross section, when based completely hadronic kinematics, well-described by simple...
Single neutral pion production via muon antineutrino charged-current interactions in plastic scintillator (CH) is studied using the \minerva detector exposed to NuMI low-energy, wideband beam at Fermilab. Measurement of this process constrains models nuclei, which important because neutral-current analog a background for $\bar{\nu}_e$ appearance oscillation experiments. The differential cross sections $\pi^0$ momentum and angle, events with single observed no charged pions, are presented...
The Short-Baseline Neutrino program in Fermilab aims to resolve the nature of low-energy excess events observed LSND and MiniBooNE, analyze with unprecedented precision neutrino interactions argon. These studies require a reliable estimate cross sections, particular for charged current quasielastic scattering (CCQE). Here, we report updates uro Monte Carlo generator that, most notably, bring state-of-the-art spectral functions model ground state properties argon nucleus, improve accuracy...
This article is aimed at improving the description of lepton-nucleus interactions in sub-GeV energy range. Approximate spectral functions for oxygen, calcium, and argon are constructed used to obtain electron cross sections a given scattering angle. Comparison with sample available experimental data shows satisfactory agreement. Discrepancy between presented model systematic computations oxygen [O. Benhar et al., Phys. Rev. D 72, 053005 (2005)] also found be very small. Analysis appropriate...
We propose a method of selecting high-purity sample charged current quasielastic neutrino interactions to obtain precise reconstruction the energy. The performance was verified with several tests using genie, neut, and nuwro Monte Carlo event generators both carbon argon targets. can be useful in oscillation studies beams few GeV.
There has been a great deal of theoretical work on sophisticated charged current quasi-elastic (CCQE) neutrino interaction models in recent years, prompted by number experimental results that measured unexpectedly large CCQE cross sections nuclear targets. As the dominant mode at T2K energies, and signal process oscillation analyses, it is important for experiment to include realistic section uncertainties analyses. To this end, T2K's Neutrino Interaction Working Group implemented NEUT,...
The semi-exclusive channel $\nu_{\mu}+\textrm{CH}\rightarrow\mu^{-}\pi^{0}+\textrm{nucleon(s)}$ is analyzed using MINERvA exposed to the low-energy NuMI $\nu_{\mu}$ beam with spectral peak at $E_{\nu} \simeq 3$ GeV. Differential cross sections for muon momentum and production angle, $\pi^{0}$ kinetic energy squared four-momentum transfer are reported, section $\sigma(E_{\nu})$ obtained over range 1.5 GeV $\leq E_{\nu} <$ 20 Results compared GENIE NuWro predictions published...
MiniBooNE charge current quasi-elastic double differential cross section data are analyzed and confronted with predictions of two theoretical nucleus models: Fermi gas spectral function. The fitting procedure includes the overall flux uncertainty multiplicative factor. In order to obtain a reliable value axial mass, bins large contribution from small momentum transfer eliminated analysis. It is shown that best fit mass becomes smaller as cut more restrictive. For $q_{cut}=500$~MeV/c obtained...