On the optimum distance for signal-energy mapping in extensive air shower arrays (2008)
Ros, G., Medina-Tanco, G., Del Peral, L., D'Olivo, J. C., Arqueros, F., Rodriguez-Frias, M. D.
In high energy cosmic rays surface arrays, the primary energy is currently determined from the value of the lateral distribution function (LDF) at a fixed optimum distance ropt from the shower core....
Perturbative exponential expansion and matter neutrino oscillations (2008)
Supanitsky, A. D., D'Olivo, J. C., Medina-Tanco, G.
We derive an analytical description of neutrino oscillations in matter based on the Magnus exponential representation of the time evolution operator. Our approach is valid in a wide range of the...
Abraham, J., Abreu, P., Aglietta, M., Aguirre, I C., Allard, D., Allekotte, I., ...
© 2008 The American Physical Society
Abraham, J., Abreu, P., Aglietta, M., Aguirre, I C., Allard, D., Allekotte, I., ...
© 2008 The American Physical Society
Galactic neutrino background from cosmic ray interaction with the ISM content (2007)
De Donato, C., Medina-Tanco, G. A., D'Olivo, J. C.
We use a diffusive model for the propagation of Galactic cosmic rays to estimate the charged pion production in interactions with protons of the interstellar medium. Cosmic ray nuclei from proton to...
Analytical description of the Day-Night neutrino asymmetry (2007)
Supanitsky, A. D., D'Olivo, J. C., Medina-Tanco, G. A.
We present a new treatment of the Earth matter effects on the neutrino oscillations that is valid for an arbitrary density profile. When applied to the the study of the day-night effect on the solar...
Lateral distribution and the energy determination of showers along the ankle (2007)
Ros, G., Medina-Tanco, G. A., De Donato, C., Del Peral, L., Rodríguez-Frías, D., D'Olivo, J. C., ...
The normalization constant of the lateral distribution function (LDF) of an extensive air shower is a monotonous (almost linear) increasing function of the energy of the primary. Therefore, the...
Abraham, J., Aglietta, M., Aguirre, C., Allard, D., Allekotte, I., Allison, P., ...
An upper limit of 16% (at 95% c.l.) is derived for the photon fraction in cosmic rays with energies greater than $10^{19}$ eV, based on observations of the depth of shower maximum performed with the...
Interaction of ultra-energetic cosmic neutrinos with a thermal gas of relic neutrinos (2005)
D'Olivo, J. C., Nellen, L., Sahu, S., Van Elewyck, Veronique
We use the formalism of finite-temperature field theory to study the interactions of ultra-high energy (UHE) cosmic neutrinos with the thermal background of relic neutrinos. From the imaginary part...
D'Olivo, J. C., Nellen, L., Sahu, S., Van Elewyck, V.
We use the formalism of finite-temperature field theory to study the interactions of ultra-high energy (UHE) cosmic neutrinos with the background of relic neutrinos and to derive general expressions...
UHE neutrino damping in a thermal gas of relic neutrinos (2005)
D'Olivo, J. C., Nellen, L., Sahu, S., Van Elewyck, V.
We present a calculation of the damping of an ultra-energetic (UHE) cosmic neutrino travelling through the thermal gas of relic neutrinos, using the formalism of finite-temperature field theory. From...
Neutrinospheres, resonant neutrino oscillations, and pulsar kicks (2005)
Barkovich, M., D'Olivo, J. C., Montemayor, R.
Pulsars are rapidly rotating neutron stars and are the outcome of the collapse of the core of a massive star with a mass of the order of or larger than eight solar masses. This process releases a...
Can there be neutrino oscillation in Gamma-Ray Bursts fireball ? (2005)
The central engine which powers the Gamma-Ray Burst (GRB) fireball, produces neutrinos in the energy range of about 5-20 MeV. Fractions of these neutrinos may propagate through the fireball which is...
ALICE Technical Design Report on Forward Detectors : FMD, T0 and V0 (2005)
Cortese, P., Dellacasa, G., Ramello, L., Sitta, M., Ahmad, N., Ahmad, S., ...
ALICE Technical Design Report of the Computing (2005)
Cortese, P., Dellacasa, G., Ramello, L., Sitta, M., Ahmad, N., Ahmad, S., ...
ALICE Technical Design Report on Forward Detectors : FMD, T0 and V0 (2005)
Cortese, P., Dellacasa, G., Ramello, L., Sitta, M., Ahmad, N., Ahmad, S., ...
ALICE Technical Design Report of the Computing (2005)
Cortese, P., Dellacasa, G., Ramello, L., Sitta, M., Ahmad, N., Ahmad, S., ...
Active-sterile neutrino oscillations and pulsar kicks (2004)
Barkovich, M., D'Olivo, J. C., Montemayor, R.
We develop a thorough description of neutrino oscillations in a magnetized protoneutron star, based on a resonance layer for neutrinos with different momentum directions. We apply our approach to the...
Properties and performance of the prototype instrument for the Pierre Auger Observatory (2004)
Abraham, J., Aglietta, M., Aguirre, I. C., Albrow, M., Allard, D., Allekotte, I., ...
Copyright © 2003 Elsevier B.V. All rights reserved.
Properties and performance of the prototype instrument for the Pierre Auger Observatory (2004)
Abraham, J., Aglietta, M., Aguirre, I. C., Albrow, M., Allard, D., Allekotte, I., ...
Copyright © 2003 Elsevier B.V. All rights reserved.
Neutrinos and Nucleosynthesis in Supernova (2003)
Solis, U., D'Olivo, J. C., Cabral-Rosetti, L. G.
The type II supernova is considered as a candidate site for the production of heavy elements. The nucleosynthesis occurs in an intense neutrino flux, we calculate the electron fraction in this...
Magnus Expansion and Three-Neutrino Oscillations in Matter (2003)
Aguilar-Arevalo, Alexis A., Cabral-Rosetti, L. G., D'Olivo, J. C.
We present a semi-analytical derivation of the survival probability of solar neutrinos in the three generation scheme, based on the Magnus approximation of the evolution operator of a three level...
Neutrino oscillation mechanism for pulsar kicks reexamined (2002)
Barkovich, M., D'Olivo, J. C., Montemayor, R., Zanella, J. F.
Anisotropic neutrino emission during the neutron star formation can be the origin of the observed proper motions of pulsars. We derive a general expression for the momentum asymmetry in terms of the...
ALICE addentum to the Technical Design Report of the time of flight system (TOF) (2002)
Cortese, P., Dellacasa, G., Ramello, L., Scalas, E., Sitta, M., Ahmad, N., ...
ALICE addentum to the Technical Design Report of the time of flight system (TOF) (2002)
Cortese, P., Dellacasa, G., Ramello, L., Scalas, E., Sitta, M., Ahmad, N., ...
Pulsar motions from neutrino oscillations induced by a violation of the equivalence principle (2001)
Barkovich, M., Casini, H., D'Olivo, J. C., Montemayor, R.
We analize a possible explanation of the pulsar motions in terms of resonant neutrino transitions induced by a violation of the equivalence principle (VEP). Our approach, based on a parametrized...
VEP oscillation solutions to the solar neutrino problem (1999)
Casini, H., D'Olivo, J. C., Montemayor, R.
We study the solar neutrino problem within the framework of a parametrized post-Newtonian formulation for the gravitational interaction of the neutrinos, which incorporates a violation to the...
Casini, H., D'Olivo, J. C., Montemayor, R., Urrutia, L. F.
In this work we propose an extended formulation for the interaction between neutrinos and gravitational fields. It is based on the parametrized post-Newtonian aproach, and includes a violation of the...
Calibration and monitoring of water Cerenkov detectors with stopping and crossing muons (1998)
Alarcón, M, Alcaraz, F C, Barrera, J, Cantoral, E, D'Olivo, J C, Fernández, A, ...
Field-Theoretic Treatment of Mixed Neutrinos in a Neutrino and Matter Background (1998)
J. C. D'olivo, Jos'e F. Nieves
We use the method of finite temperature field theory to examine the propagation of mixed neutrinos through dense media, putting the emphasis in those situations in which the neutrinos themselves are...
Neutrino effective charge and cerenkov radiation (1996)
D'Olivo, J. C, Nieves, J. F, Palash, B. P
We consider the Čerenkov radiation emitted by neutrinos due to their effective electromagnetic interactions as they pass through a polarisable medium. The effect exists even for massless, chiral...
Cherenkov radiation by massless neutrinos (1996)
D'Olivo, J C, Nieves, J. F, Pal, P. B
Due to their weak interactions, neutrinos can polarize a medium and acquire an induced charge. We consider the Cherenkov radiation emitted by neutrinos due to their effective electromagnetic...
Remarks on the Coulomb and Covariant Gauges in Finite Temperature QED (1995)
D'Olivo, J. C., Nieves, Jose F.
We compare the use of the Coulomb gauge in finite temperature QED with a recently proposed prescription for covariant gauges, in which only the transverse photon degrees of freedom are thermalized....
FIELD-THEORETIC TREATMENT OF MIXED NEUTRINOS IN A NEUTRINO AND MATTER BACKGROUND (1995)
We use the method of finite temperature field theory to examine the propagation of mixed neutrinos through dense media, putting the emphasis in those situations in which the neutrinos themselves are...
QED at Finite Temperature in the Coulomb Gauge (1994)
D'Olivo, J. C., Nieves, J. F., Torres, M., Tututi, E.
We argue that calculations in QED at finite temperature are more conveniently carried out in the Coulomb gauge, in which only the physical photon degrees of freedom play a rol and are thermalized. We...
Damping Rate of a Fermion in a Medium (1993)
D'Olivo, J. C., Nieves, Jose F.
We examine the relation between the damping rate of a massless, chiral fermion that propagates in a medium, and the rate $\Gamma$ of approach to equilibrium. It is proven that these quantities are...