Listar Ciencias Exactas y Naturales por tema "Fisica de particulas elementares e campos"
Mostrando ítems 1-20 de 42
-
Algebraic properties of the bethe ansatz for an spl(2,1)-supersymmetric t-j model
(1993) [Artículo de periódico]We investigate the algebraic structure of the supersymmetric t−J model in one dimension. We prove that the Bethe ansatz states are highest-weight vectors of an spl(2,1) superalgebra. By acting with shift operators we ... -
Analysis of low-x gluon Density from the F/Sub 2/ scaling violations
(1997) [Artículo de periódico]We present an analysis of the current methods of the approximate determination of the gluon density G( X, Q2) at low x from the scaling violations of the proton structure function F2(x,Q2). The gluon density is obtained ... -
Analysis of the photoproduction of massive gauge bosons at the LHeC
(2012) [Artículo de periódico]In this work we investigate the photoproduction of massive gauge bosons, W± and Zº, as part of relevant physics topics to be studied in the proposed electron-proton collider, the Deep Inelastic Electron- Nucleon Scattering ... -
Attractive forces between electrons in (2+1) - dimensional QED
(1992) [Artículo de periódico]Vacuum polarization effects are nonperturbatively incorporated into the photon propagator to eliminate the severe infrared problems characteristic of (2+1)-dimensional QED (QED₃). The theory is thus rephrased in terms of ... -
Backward dilepton production in color dipole and parton models
(2010) [Artículo de periódico]The Drell–Yan dilepton production at backward rapidities is studied in proton-nucleus collisions at Relativistic Heavy Ion Collider and LHC energies by comparing two different approaches: the kT factorization at next-to-leading ... -
Canonical derivation of the gluon propagator in the temporal gauge
(1986) [Artículo de periódico]We reexamine the problem of obtaining, within the operator approach, an unambiguous expression for the longitudinal gluon propagator in the temporal gauge. A regularization procedure respecting Gauss's law and the Hermiticity ... -
Canonical quantization of a two-dimensional model with anomalous breaking of gauge invariance
(1986) [Artículo de periódico]We investigate in detail the operator quantum dynamics of a two-dimensional model exhibiting anomalous breaking of gauge invariance. The equal-time algebra is systematically obtained by using the Dirac-bracket formalism ... -
Chiral bosons and improper constraints
(1994) [Artículo de periódico]We argue that a consistent quantization of the Floreanini-Jackiw model, as a constrained system, should start by recognizing the improper nature of the constraints. Then, each boundary condition defines a problem which ... -
Coupling of fermions to the three-dimensional noncommutative CP/sup N-1/ model : minimal and supersymmetric extensions
(2004) [Artículo de periódico]We consider the coupling of fermions to the three-dimensional noncommutative CPN21 model. In the case of minimal coupling, although the infrared behavior of the gauge sector is improved, there are dangerous ~quadratic! ... -
Deciphering 40 TeV rapidity gap physics with 2 TeV jet events
(1992) [Artículo de periódico]Rapidity gaps may provide an adequate signature for electroweak processes at supercolliders, including the production of the Higgs particle. We show how this important issue can be studied in the dijet final states of ... -
A dependence of hadron-nucleus massive lepton pair production
(1994) [Artículo de periódico]Nuclear effects in the small x region of hadron-nucleus Drell-Yan processes at 800 GeV are analyzed. We employ the parton recombination model to describe the suppression in the RpA DY(x₂)ratio and we compare it with REMC(x), ... -
Diffraction and the gluon mass
(1993) [Artículo de periódico]We recently proposed a QCD Pomeron described by the exchange of two nonperturbative gluons characterized by a dynamically generated gluon mass. It is shown here that data on elastic scattering, exclusive p production in ... -
Diffractive Higgs boson photoproduction in ultraperipheral collisions at LHC
(2010) [Artículo de periódico]A new production mechanism for the standard model Higgs boson in ultraperipheral collisions at the LHC, which allows central exclusive diffractive production by double pomeron exchange in photonproton processes, is presented. ... -
Diffractive Higgs boson photoproduction in γp process
(2008) [Artículo de periódico]We explore an alternative process for diffractive Higgs boson production in peripheral pp collisions arising from double Pomeron exchange in photon-proton interaction. We introduce the impact factor formalism in order to ... -
Diffractive quarkonium production in association with a photon at the LHC
(2010) [Artículo de periódico]The rates for diffractive quarkonium plus prompt-photon associated production at the LHC are estimated. The theoretical framework considered in the J/Ψ (or Υ ) production associated with a direct photon at the hadron ... -
Duality symmetry in the schwarz-sen model
(1997) [Artículo de periódico]The continuous extension of the discrete duality symmetry of the Schwarz-Sen model is studied. The corresponding infinitesimal generator Q turns out to be local, gauge invariant, and metric independent. Furthermore, Q ... -
Dynamics of gauge systems and Dirac's conjecture
(1985) [Artículo de periódico]For systems possessing only first-class constraints, we rigorously prove that the secondary constraints act as independent generators of gauge transformations (Dirac's conjecture). The proof essentially consists in ... -
Estimate of the single diffractive heavy quark production in heavy ion collisions at the CERN LHC
(2010) [Artículo de periódico]The single diffractive cross section for heavy quarks production is calculated at next-to-leading order (for nucleus-nucleus collisions. Such processes are expected to occur at the LHC, where the nuclei involved are lead ... -
Estimations for the Higgs boson production with QCD and EW corrections in exclusive events at the LHC
(2011) [Artículo de periódico]The Higgs boson production is investigated in proton-proton collisions at next-to-leading-order accuracy in central exclusive diffractive processes at the LHC. The production process by the double Pomeron exchange is ... -
Estimations for the single diffractive production of the Higgs boson at the Tevatron and the LHC
(2011) [Artículo de periódico]The single diffractive production of the standard model Higgs boson is computed using the diffractive factorization formalism, taking into account a parametrization for the Pomeron structure function provided by the H1 ...
