Now showing items 1-20 of 27

    • Chiral fermions, massless particles and Poincare covariance 

      Andrzejewski, Krzysztof; Kijanka-Dec, Agnieszka; Kosiński, Piotr; Maślanka, Paweł (Elsevier, 2015-05-19)
      The coadjoint orbit method is applied to the construction of Hamiltonian dynamics of massless particles of arbitrary helicity. The unusual transformation properties of canonical variables are interpreted in terms of nonlinear ...
    • Conformal Newton–Hooke algebras, Niederer's transformation and Pais–Uhlenbeck oscillator 

      Andrzejewski, Krzysztof (Elsevier B.V., 2014)
      Dynamical systems invariant under the action of the l-conformal Newton–Hooke algebras are constructed by the method of nonlinear realizations. The relevant first order Lagrangians together with the corresponding Hamiltonians ...
    • Conformal Newton–Hooke symmetry of Pais–Uhlenbeck oscillator 

      Andrzejewski, Krzysztof; Galajinsky, A.; Gonera, Joanna (North-Holland, 2014)
      It is demonstrated that the Pais–Uhlenbeck oscillator in arbitrary dimension enjoys the l -conformal Newton–Hooke symmetry provided frequencies of oscillation form the arithmetic sequence ωk=(2k−1)ω1, where k=1,…,n, and ...
    • Constrains for non-standard statistical models of particle creations by identified hadron multiplicity results at LHC energies 

      Wibig, T (Springer Berlin Heidelberg, 2014)
      We analyzed the identified hadron multiplicity predictions of the modified thermodynamical model of the multiparticle production processes with non-extensive statistic. The replacement of the standard Boltzmann exponential ...
    • Elastic scattering in geometrical model 

      Plebaniak, Zbigniew; Wibig, Tadeusz (Elsevier B.V., 2016)
      The experimental data on proton–proton elastic and inelastic scattering emerging from the measurements at the Large Hadron Collider, calls for an efficient model to fit the data. We have examined the optical, geometrical ...
    • Erratum: Measurement of D^{∗±} production in deep inelastic scattering at HERA 

      Abramowicz, H.; Abt, I.; Adamczyk, L.; Ciborowski, J.; Perlanski, W. (Springer Berlin Heidelberg, 2014)
      In the analysis for our paper on D* production, the beauty contribution was erroneously subtracted twice in the extraction of the reduced cross sections. This affected tables 9 and 10 as well as figures 9 and 10 that ...
    • Further studies of the photoproduction of isolated photons with a jet at HERA 

      Abramowicz, H.; Abt, I.; Adamczyk, L.; Ciborowski, J.; Perlanski, W. (Springer Science+Business Media on behalf of the Scuola Internazionale Superiore di Studi Avanzati, 2014)
      In this extended analysis using the ZEUS detector at HERA, the photoproduction of isolated photons together with a jet is measured for different ranges of the fractional photon energy, x_γ^{meas}, contributing to the ...
    • Generalized Niederer’s transformation for quantum Pais–Uhlenbeck oscillator 

      Andrzejewski, Krzysztof (Elsevier B.V., 2015)
      We extend, to the quantum domain, the results obtained in [Nucl. Phys. B 885 (2014) 150] and [Phys. Lett. B 738 (2014) 405] concerning Niederer’s transformation for the Pais–Uhlenbeck oscillator. Namely, the quantum ...
    • Hamiltonian formalisms and symmetries of the Pais–Uhlenbeck oscillator 

      Andrzejewski, Krzysztof (Elsevier B.V., 2014)
      The study of the symmetry of Pais–Uhlenbeck oscillator initiated in Andrzejewski et al. (2014) [24] is continued with special emphasis put on the Hamiltonian formalism. The symmetry generators within the original Pais and ...
    • Hidden Lorentz symmetry of the Hořava–Lifshitz gravity 

      Rembieliński, Jakub (North-Holland, 2014)
      In this Letter it is shown that the Hořava–Lifshitz gravity theory admits Lorentz symmetry preserving preferred global time foliation of the spacetime.
    • Induced gravity and gauge interactions revisited 

      Broda, Bogusław; Szanecki, Michał (North-Holland, 2009)
      It has been shown that the primary, old-fashioned idea of Sakharov's induced gravity and gauge interactions, in the “one-loop dominance” version, works astonishingly well yielding phenomenologically reasonable results. As ...
    • “Isochronic” dynamical systems and nullification of amplitudes 

      Domienik, Joanna; Kosiński, Piotr (North-Holland, 2003)
      We construct the set of theories which share the property that the tree-level threshold amplitudes nullify even if both initial and final states contain the same type of particles. The origin of this phenomenon lies in ...
    • Measurement of beauty and charm production in deep inelastic scattering at HERA and measurement of the beauty-quark mass 

      Abramowicz, H.; Abt, I.; Adamczyk, L.; Ciborowski, J.; Perlanski, W. (Springer Science+Business Media on behalf of the Scuola Internazionale Superiore di Studi Avanzati, 2014)
      The production of beauty and charm quarks in ep interactions has been studied with the ZEUS detector at HERA for exchanged four-momentum squared 5 < Q^2 < 1000 GeV^2 using an integrated luminosity of 354 pb^{−1}. The ...
    • Modalities for an Allegorical Conceptual Data Model 

      Zielińsk, Bartosz; Maślanka, Paweł; Sobieski, Ścibor (MDPI AG, 2014)
      Allegories are enriched categories generalizing a category of sets and binary relations. In this paper, we extend a new, recently-introduced conceptual data model based on allegories by adding support for modal operators ...
    • Modification of thin films induced by slow heavy ions analysed with PIXE and SRIM 

      Antoszewska-Moneta, Malgorzata; Brzozowski, Romuald; Moneta, Marek (Springer, 2015-03-17)
      In the present work the particle induced X-rays (PIXE) emitted during interaction of inert and active slow heavy (HI) ions with specially prepared thin films were measured. Kinematics of the interaction was simulated ...
    • On the triviality of higher-derivative theories 

      Andrzejewski, Krzysztof; Gonera, Joanna; Machalski, Piotr; Bolonek-Lasoń, Katarzyna (North-Holland, 2012)
      The higher-derivative theories with degenerate frequencies exhibit BRST symmetry [V.O. Rivelles, Phys. Lett. B 577 (2003) 147]. In the present Letter meaning of BRST-invariance condition is analyzed. The BRST symmetry is ...
    • Perturbative quantum damping of cosmological expansion 

      Broda, Bogusław (North-Holland, 2014)
      Perturbative quantum gravity in the framework of the Schwinger–Keldysh formalism is applied to compute lowest-order corrections to expansion of the Universe described in terms of the spatially flat Friedman–Lemaître–Robe ...
    • Photoproduction of isolated photons, inclusively and with a jet, at HERA 

      Abramowicz, H.; Abt, I.; Adamczyk, L.; Ciborowski, J.; Perlański, W. (Elsevier B.V., 2014)
      The photoproduction of isolated photons, both inclusive and together with a jet, has been measured with the ZEUS detector at HERA using an integrated luminosity of 374 pb^{−1}. Differential cross sections are presented in ...
    • Quantum gravity stability of isotropy in homogeneous cosmology 

      Broda, Bogusław (North-Holland, 2011)
      It has been shown that anisotropy of homogeneous spacetime described by the general Kasner metric can be damped by quantum fluctuations coming from perturbative quantum gravity in one-loop approximation. Also, a formal ...
    • Scaling violation and the inelasticity of very high energy proton–proton interactions 

      Wibig, Tadeusz (North-Holland, 2011)
      The pseudorapidity measurements at LHC, although in the central region only, allows us to perform preliminary tests of the multiparticle production extrapolation formula inspired by the analysis of recent cosmic ray data. ...