H. Spiesberger

ORCID: 0000-0002-1674-3736
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About
Contact & Profiles
Research Areas
  • Particle physics theoretical and experimental studies
  • Quantum Chromodynamics and Particle Interactions
  • High-Energy Particle Collisions Research
  • Particle Detector Development and Performance
  • Particle Accelerators and Free-Electron Lasers
  • Computational Physics and Python Applications
  • Dark Matter and Cosmic Phenomena
  • Neutrino Physics Research
  • Nuclear physics research studies
  • Superconducting Materials and Applications
  • Black Holes and Theoretical Physics
  • Cosmology and Gravitation Theories
  • Atomic and Molecular Physics
  • Distributed and Parallel Computing Systems
  • Particle accelerators and beam dynamics
  • Pulsars and Gravitational Waves Research
  • Advanced Chemical Physics Studies
  • Radiation Detection and Scintillator Technologies
  • Electrical and Bioimpedance Tomography
  • Reservoir Engineering and Simulation Methods
  • Microwave Imaging and Scattering Analysis
  • Crystallography and Radiation Phenomena
  • Hybrid Renewable Energy Systems
  • Muon and positron interactions and applications
  • Numerical methods in inverse problems

Johannes Gutenberg University Mainz
2015-2024

University of Pavia
2023

University of Liverpool
2022

Max Planck Institute for Physics
2022

Thomas Jefferson National Accelerator Facility
2022

University of Cape Town
2015-2019

Universitat Autònoma de Barcelona
2018-2019

Barcelona Institute for Science and Technology
2018-2019

Innovation Cluster (Canada)
2019

Michigan State University
2019

Abstract A renormalization scheme for the electroweak standard model is presented in which electric charge and masses of gauge bosons, Higgs particle fermions are used as physical parameters. The photon treated such that quantum electrodynamics contained a simple substructure. Field respecting symmetry gives finite propagators vertex functions. Ward identities between Green functions unphysical sector allow maintains pole structure t'Hooft‐Feynman gauge. We give complete list self energies...

10.1002/prop.19860341102 article EN Fortschritte der Physik 1986-01-01

HERAFitter is an open-source package that provides a framework for the determination of parton distribution functions (PDFs) proton and many different kinds analyses in Quantum Chromodynamics (QCD). It encodes results from wide range experimental measurements lepton–proton deep inelastic scattering proton–proton (proton–antiproton) collisions at hadron colliders. These are complemented with variety theoretical options calculating PDF-dependent cross section predictions corresponding to...

10.1140/epjc/s10052-015-3480-z article EN cc-by The European Physical Journal C 2015-07-01

10.1140/epjc/s10052-012-2082-2 article EN The European Physical Journal C 2012-07-01

We calculate the next-to-leading-order cross section for inclusive production of ${D}^{*\ifmmode\pm\else\textpm\fi{}}$ mesons in $p\overline{p}$ collisions as a function transverse momentum and rapidity two approaches using massive or massless charm quarks. For section, we derive limit from theory. find that this differs genuine version with $\overline{\mathrm{M}\mathrm{S}}$ (minimal-subtraction) factorization by finite corrections. By adjusting subtraction terms, establish theory which...

10.1103/physrevd.71.014018 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2005-01-20

We calculate the transverse-momentum (${p}_{T}$) distribution for inclusive hadroproduction of $B$ mesons at intermediate values ${p}_{T}$ next-to-leading order (NLO) in a dedicated finite-mass scheme using realistic nonperturbative fragmentation functions that are obtained through global fit to ${e}^{+}{e}^{\ensuremath{-}}$ data from CERN LEP1 and SLAC SLC exploiting their universality scaling violations. find effects moderately enhance cross section, by about 20% ${p}_{T}=2{m}_{b}$,...

10.1103/physrevd.77.014011 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2008-01-11

Abstract The solenoidal large intensity device (SoLID) is a new experimental apparatus planned for Hall A at the Thomas Jefferson National Accelerator Facility (JLab). SoLID will combine angular and momentum acceptance with capability to handle very high data rates luminosity. With slate of approved high-impact physics experiments, push JLab limit QCD frontier that exploit full potential its 12 GeV electron beam. In this paper, we present an overview rich program can be realized SoLID, which...

10.1088/1361-6471/acda21 article EN cc-by Journal of Physics G Nuclear and Particle Physics 2023-05-31

We study the inclusive hadroproduction of D0, D+, D*+, and D(s)+ mesons at next-to-leading order in parton model quantum chromodynamics endowed with universal nonperturbative fragmentation functions fitted to e+e- annihilation data from CERN LEP1. Working general-mass variable-flavor-number scheme, we resum large logarithms through evolution and, same time, retain full dependence on charm-quark mass without additional theoretical assumptions. In this way, cross section distributions...

10.1103/physrevlett.96.012001 article EN Physical Review Letters 2006-01-04

We investigate how the CP quantum numbers of a neutral Higgs boson or spin-zero resonance, produced at CERN Large Hadron Collider, can be determined in its tau-pair decay mode. use method developed an earlier paper based on distributions two angles and apply it to major 1-prong tau decays. show for resulting dilepton, lepton-pion, two-pion final states that appropriate selection cuts significantly enhance discriminating power these observables. From our analysis we conclude that, provided...

10.1103/physrevd.84.116003 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2011-12-29

HERAFitter is an open-source package that provides a framework for the determination of parton distribution functions (PDFs) proton and many different kinds analyses in Quantum Chromodynamics (QCD). It encodes results from wide range experimental measurements lepton-proton deep inelastic scattering proton-proton (proton-antiproton) collisions at hadron colliders. These are complemented with variety theoretical options calculating PDF-dependent cross section predictions corresponding to...

10.48550/arxiv.1410.4412 preprint EN other-oa arXiv (Cornell University) 2014-01-01

We study inclusive ${\mathrm{\ensuremath{\Lambda}}}_{c}^{\ifmmode\pm\else\textpm\fi{}}$-baryon production in $pp$ collisions the general-mass variable-flavor-number scheme and compare with data from LHCb, ALICE, CMS collaborations. perform a new fit of $c\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Lambda}}}_{c}^{+}$ fragmentation function combining ${e}^{+}{e}^{\ensuremath{-}}$ OPAL Belle. The agreement LHC is slightly worse compared calculation using an older function, tension between...

10.1103/physrevd.101.114021 article EN cc-by Physical review. D/Physical review. D. 2020-06-22

We advocate charmed-hadron inclusive hadroproduction as a laboratory to probe intrinsic charm (IC) inside the colliding hadrons. Working at next-to-leading order in general-mass variable-flavor-number scheme endowed with nonperturbative fragmentation functions recently extracted from global fit ${e}^{+}{e}^{\ensuremath{-}}$ annihilation data KEKB, CESR, and LEP1, we first assess sensitivity of Tevatron ${D}^{0}$, ${D}^{+}$, ${D}^{*+}$ production IC parametrizations provided by Pumplin et al....

10.1103/physrevd.79.094009 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2009-05-11

We calculate the next-to-leading-order cross section for inclusive production of B mesons in pp collisions general-mass variable-flavor-number scheme, an approach which takes into account finite mass b quarks. use realistic evolved non-perturbative fragmentation functions obtained from fits to e+e- data and compare results transverse-momentum rapidity distributions at a center-of-mass energy 7 TeV with recent CMS Collaboration. find good agreement, particular large values pT.

10.1103/physrevd.84.094026 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2011-11-21
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