Browsing Artykuły naukowe by Title
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Chiral fermions, massless particles and Poincare covariance
(Elsevier, 20150519)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
(Elsevier B.V., 2014)Dynamical systems invariant under the action of the lconformal 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
(NorthHolland, 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 nonstandard statistical models of particle creations by identified hadron multiplicity results at LHC energies
(Springer Berlin Heidelberg, 2014)We analyzed the identified hadron multiplicity predictions of the modified thermodynamical model of the multiparticle production processes with nonextensive statistic. The replacement of the standard Boltzmann exponential ... 
Elastic scattering in geometrical model
(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
(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
(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
(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
(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
(NorthHolland, 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
(NorthHolland, 2009)It has been shown that the primary, oldfashioned idea of Sakharov's induced gravity and gauge interactions, in the “oneloop dominance” version, works astonishingly well yielding phenomenologically reasonable results. As ... 
“Isochronic” dynamical systems and nullification of amplitudes
(NorthHolland, 2003)We construct the set of theories which share the property that the treelevel 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 beautyquark mass
(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 fourmomentum squared 5 < Q^2 < 1000 GeV^2 using an integrated luminosity of 354 pb^{−1}. The ... 
Modalities for an Allegorical Conceptual Data Model
(MDPI AG, 2014)Allegories are enriched categories generalizing a category of sets and binary relations. In this paper, we extend a new, recentlyintroduced 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
(Springer, 20150317)In the present work the particle induced Xrays (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 higherderivative theories
(NorthHolland, 2012)The higherderivative theories with degenerate frequencies exhibit BRST symmetry [V.O. Rivelles, Phys. Lett. B 577 (2003) 147]. In the present Letter meaning of BRSTinvariance condition is analyzed. The BRST symmetry is ... 
Perturbative quantum damping of cosmological expansion
(NorthHolland, 2014)Perturbative quantum gravity in the framework of the Schwinger–Keldysh formalism is applied to compute lowestorder 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
(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
(NorthHolland, 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 oneloop approximation. Also, a formal ... 
Scaling violation and the inelasticity of very high energy proton–proton interactions
(NorthHolland, 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. ...