62,971 research outputs found
The internal structure of jets at colliders: light and heavy quark inclusive hadronic distributions
In this paper, we report our results on charged hadron multiplicities of
heavy quark initiated jets produced in high energy collisions. After
implementing the so-called dead cone effect in QCD evolution equations, we find
that the average multiplicity decreases significantly as compared to the
massless case. Finally, we discuss on the transverse momentum distribution of
light quark initiated jets and emphasize on the comparison between our
predictions and CDF data.Comment: 6 pages, 3 figures-Talk presented by Redamy Perez-Ramos at Jets in
Proton-Proton and Heavy-Ion Collisions, August 12-14, 2010, Prague, Czech
Republi
National Fantasies, Exclusion, and the Many Houses on Mango Street
This article argues that understanding what the house in Sandra Cisneros\u27s The House on Mango Street symbolizes is foundational to contextualizing the radical possibilities that Cisneros enacts in her work. Unlike most critics who read the house as referencing the title of the text, I argue that the novel is full of houses, notably the house located on Mango Street that narrator Esperanza Cordero longs to escape from, and the house away from Mango Street that she longs to one day have. By reading these two houses through Homi Bhabha\u27s notion of the unhomely and Gaston Bachelard\u27s notion of felicitous space , we can better understand a critique of the house in light of its resonance with the American Dream on the one hand, and a reconfiguration of that symbolism through a feminist intervention on the other. Keywords: Cisneros, Houses, American Dream, Women, Bachelard, Bhabh
Bose-Einstein Condensation in a Constant Magnetic Field
We discuss the occurrence of Bose-Einstein condensation in systems of
noninteracting charged particles in three in one dimensions and in presence of
an external magnetic field. In the one dimensional, as well as in the magnetic
field cases, although not a critical temperature, a characteristic temperature
can be found, corresponding to the case in which the ground state density
becomes a macroscopic fraction of the total density. The case of relativistic
charged scalar and vector particles is studied. The results obtainedgive
support to the existence of superconductivity in extremely strong magnetic
fields, and leads to the prediction of superconductive-ferromagnetic behavior
in the vector field case, which might be of interest in condensed matter as
well as in cosmology. Some features of the magnetization in the early universe
are conjectured.Comment: 20 pages, 2 GIF figure
Neutrino-nucleon scattering rate in proto neutron star matter
We present a calculation of the neutrino-nucleon scattering cross section
which takes into account the nuclear correlations in the relativistic random
phase approximation. Our approach is based on a quantum hadrodynamics model
with exchange of , , , and mesons. In view
of applications to neutrino transport in the final stages of supernova
explosion and protoneutron star cooling, we study the evolution of the neutrino
mean free path as a function of density, proton-neutron asymmetry and
temperature. Special attention was paid to the issues of renormalization of the
Dirac sea, residual interactions in the tensor channel and meson mixing. It is
found that RPA corrections, with respect to the mean field approximation,
amount to only 10% to 15% at high density.Comment: 20 pages, 9 figures, subm. to EPJ
MILOU : a Monte-Carlo for Deeply Virtual Compton Scattering
In this note, we present a new generator for Deeply Virtual Compton
Scattering processes. This generator is based on formalism of Generalized
Partons Distributions evolved at Next Leading Order (NLO). In the following we
give a brief description of this formalism and we explain the main features of
the generator for the elastic reactions, as well as for proton dissociation.Comment: 18 pages, 9 figure
Relativistic approach to positronium levels in a strong magnetic field
We have investigated the bound states of an electron and positron in
superstrong magnetic fields typical for neutron stars. The complete
relativistic problem of positronium in a strong magnetic field has not been
succesfully solved up to now. In particular, we have studied the positronium
when it moves relativistically across the magnetic field. A number of problems
which deal with the pulsar magnetosphere, as well as the evolution of
protoneutron stars, could be considered as a field for application
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