Browsing Artykuły naukowe by Issue Date
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“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 ... 
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 ... 
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. ... 
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 ... 
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 ... 
Ultrahigh Energy Neutrinos at the Pierre Auger Observatory
(Hindawi Publishing Corporation, 20120625)The observation of ultrahigh energy neutrinos (UHE𝜈�s) has become a priority in experimental astroparticle physics. UHE𝜈�s can be detected with a variety of techniques. In particular, neutrinos can interact in the ... 
Semientwining Structures and Their Applications
(Hindawi Publishing Corporation, 20121031)Semientwining structures are proposed as concepts simpler than entwining structures, yet they are shown to have interesting applications in constructing intertwining operators and braided algebras, lifting functors, ... 
Thermal induced structural and magnetic transformations in Fe_{73.5−x}Ce_{x=0,3,5,7}Si_{13.5}B_9Nb_3Cu_1 amorphous alloy
(Springer Netherlands, 2013)Structural and magnetic properties of amorphous and partly crystallized Fe_{73.5−x}Ce_{x=0,3,5,7}Si_{13.5}B_9Nb_3Cu_1 alloys, were analysed in the temperature ranging from RT to 800 °C with scanning calorimetry 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. 
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 ... 
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 ... 
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 ... 
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 ... 
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 ... 
Search for patterns by combining cosmicray energy and arrival directions at the Pierre Auger Observatory
(Springer Berlin Heidelberg, 2014)Energydependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highestenergy cosmic rays with E≥6×10^19 eV by ... 
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 ... 
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 ... 
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 ... 
Weak nAry Relational Products in Allegories
(MDPI AG, 2014)Allegories are enriched categories generalizing a category of sets and binary relations. Accordingly, relational products in an allegory can be viewed as a generalization of Cartesian products. There are several definitions ...