M. Bluj

ORCID: 0000-0003-1229-1442
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About
Contact & Profiles
Research Areas
  • 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
  • Cosmology and Gravitation Theories
  • Computational Physics and Python Applications
  • Neutrino Physics Research
  • Astrophysics and Cosmic Phenomena
  • Black Holes and Theoretical Physics
  • Medical Imaging Techniques and Applications
  • Distributed and Parallel Computing Systems
  • Particle Accelerators and Free-Electron Lasers
  • Gamma-ray bursts and supernovae
  • Nuclear reactor physics and engineering
  • Superconducting Materials and Applications
  • Radiation Detection and Scintillator Technologies
  • Atomic and Subatomic Physics Research
  • Radiation Therapy and Dosimetry
  • Advanced Data Storage Technologies
  • Muon and positron interactions and applications
  • Big Data Technologies and Applications
  • Nuclear physics research studies
  • International Science and Diplomacy
  • Scientific Computing and Data Management

National Centre for Nuclear Research
2016-2025

Institute of High Energy Physics
2015-2024

A. Alikhanyan National Laboratory
2022-2024

University of Antwerp
2024

Institute of Nuclear Physics, Polish Academy of Sciences
2024

Jagiellonian University
2024

University of Warsaw
2005-2023

École Polytechnique
2010-2022

Laboratoire Leprince-Ringuet
2010-2022

Centre National de la Recherche Scientifique
2010-2022

The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by DELPHI detector LEP. Two complementary methods are used to reconstruct energy weakly decaying b-hadrons, $E_{\mathrm{B}}^{\mathrm{weak}}$ . average value $x^{\mathrm{weak}}_{\mathrm{B}} = E_{\mathrm{B}}^{\mathrm{weak}}/E_{\mathrm{beam}}$ is measured be 0.699±0.011. resulting $x^{\mathrm{weak}}_{\mathrm{B}}$ distribution then analysed in framework two choices for perturbative contribution (parton...

10.1140/epjc/s10052-011-1557-x article EN cc-by-nc The European Physical Journal C 2011-02-01

A search for pair-produced doubly charged Higgs bosons has been performed using the data collected by DELPHI detector at LEP centre-of-mass energies between 189 and 209 GeV. No excess is observed in with respect to Standard Model background. lower limit mass of 97.3 GeV/c2 95% confidence level set left–right symmetric models any value Yukawa coupling τ leptons.

10.1016/s0370-2693(02)03125-8 article EN cc-by Physics Letters B 2003-01-01

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...

10.48550/arxiv.hep-ph/0608079 preprint EN other-oa arXiv (Cornell University) 2006-01-01

Single photons detected by the DELPHI experiment at LEP2 in years 1997–2000 are reanalysed to investigate existence of a single extra dimension modified ADD scenario with slightly warped large dimensions. The data collected centre-of-mass energies between 180 and 209 GeV for an integrated luminosity ∼650 pb−1 agree predictions Standard Model allow limit be set on graviton emission one dimension. obtained fundamental mass scale M D is 1.69 TeV/c 2 95% CL, expected 1.71 2.

10.1140/epjc/s10052-009-0874-9 article EN cc-by-nc The European Physical Journal C 2009-01-23

A search for single top production (e+e−→tc̄) via flavour changing neutral currents (FCNC) was performed using the data taken by DELPHI detector at LEP2. The analyzed have been accumulated center-of-mass energies ranging from 189 to 208 GeV. Limits 95% confidence level were obtained on anomalous coupling parameters κγ and κZ.

10.1016/j.physletb.2004.03.051 article EN cc-by Physics Letters B 2004-04-29

A determination of the single W spin density matrix (SDM) elements in reaction e+e-→W+W-→lνqq̄(l=e/μ) is reported at centre-of-mass energies between 189 and 209 GeV. The data sample used corresponds to an integrated luminosity 520 pb-1 taken by DELPHI 1998 2000. SDM elements, ρττ' W± (τ,τ'=± 1 or 0), are determined as a function W- production angle with respect e- beam direction obtained from measurements decay products application suitable projection operators, Λττ', which assume V-A...

10.1140/epjc/s10052-008-0528-3 article EN cc-by-nc The European Physical Journal C 2008-02-01

The data taken by DELPHI at centre-of-mass energies between 189 and 209 GeV are used to place limits on the CP-conserving trilinear gauge boson couplings Delta_g1z, lambda_gamma Delta_kappag associated W+W- single W production LEP2. Using from jjlv, jjjj, jjX lX final states, where j, l X represent a jet, lepton missing four-momentum, respectively, following set when one parameter is allowed vary others their Standard Model values of zero: Delta_g1z = -0.025^{+0.033}_{-0.030},...

10.1140/epjc/s10052-010-1254-1 article EN cc-by-nc The European Physical Journal C 2010-02-10

Muon bremsstrahlung photons converted in front of the DELPHI main tracker (TPC) dimuon events at LEP1 were studied two photon kinematic ranges: 0.2<E γ ≤1 GeV and transverse momentum with respect to parent muon p T <40 MeV/c, 1<E ≤10 <80 MeV/c. A good agreement observed rate predictions from QED for inner was found, contrary anomalous soft excess that has been recently hadronic Z 0 decays. The obtained ratios signal predicted level are 1.06±0.12±0.07 energy range 1.04±0.09±0.12 GeV. dead...

10.1140/epjc/s10052-008-0779-z article EN cc-by-nc The European Physical Journal C 2008-10-01

An analysis of the direct soft photon production rate as a function parent jet characteristics is presented, based on hadronic events collected by DELPHI experiment at LEP1. The dependences rates kinematic (momentum, mass, etc.) and charged, neutral total hadron multiplicities are reported. Up to scale factor about four, which characterizes overall value excess, similarity observed behaviour that inner bremsstrahlung predictions found for momentum, charged multiplicity dependences. However...

10.1140/epjc/s10052-010-1315-5 article EN cc-by-nc The European Physical Journal C 2010-04-21

Measurements are presented of R_b, the ratio b bbar cross-section to q qbar in e+e- collisions, and forward-backward asymmetry A^b_FB at twelve energy points range sqrt(s) = 130-207 GeV. These results found be consistent with Standard Model expectations. The measurements used set limits on new physics scenarios involving contact interactions.

10.1140/epjc/s10052-009-0917-2 article EN cc-by-nc The European Physical Journal C 2009-02-05
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