Experimental studies of hypernuclear dynamics, besides being essential for the understanding of s... more Experimental studies of hypernuclear dynamics, besides being essential for the understanding of strong interactions in the strange sector, have important astrophysical implications. The observation of neutron stars with masses exceeding two solar masses poses a serious challenge to the models of hyperon dynamics in dense nuclear matter, many of which predict a maximum mass incompatible with the data. In this paper, it is argued that valuable new insight can be gained from the forthcoming extension of the experimental studies of kaon electro production from nuclei to include the 208Pb(e,e′K+)Λ208Tl process. A comprehensive framework for the description of kaon electro production, based on factorization of the nuclear cross section and the formalism of the nuclear many-body theory, is outlined. This approach highlights the connection between the kaon production and proton knockout reactions, which will allow us to exploit the available 208Pb(e,e′p)207Tl data to achieve a largely model...
We report the results of a study of neutrino-carbon interactions at beam energies ranging between... more We report the results of a study of neutrino-carbon interactions at beam energies ranging between a few hundred MeV's and a few tens of GeVs carried out within the framework of the impulse approximation using a realistic spectral function. The contributions of quasielastic scattering, resonance production, and deep inelastic scattering-consistently obtained, for the first time, from a model based on a realistic description of the nuclear ground state-are compared and analyzed.
Dynamics of coherence in cortical neural activity, A. Aertsen "Social" behaviour of CNS... more Dynamics of coherence in cortical neural activity, A. Aertsen "Social" behaviour of CNS neurons, E. Alleva learning scenarios - computations and constraints, D. Amit minimum entropy coding as a design principle for sensory processing, J. Atick mathematical theory of early stages of protein folding, H. Bohr interpretation of the cerebellum cortex as a sequence in sequence out device, V. Braitenberg modelling chemical modulation of neuron processes, A. Coolen quark sensitivity of the mammalian cortex - theoretical foundations, B. Denby practical problems using neural networks, F. Fogelman measuring neuronal information transmission with neural networks, J. Hertz drifting chambers tracking with a VLSI neural network, C. Lindsey plasticity and development of the brain, L. Maffei information processing by a perception, N. Parga neural network trigger in the H1 experiment, P. Ribarics capacity control in classifiers for pattern recognition, S. Solla perception of visual motion - computational aspects and neural mechanism, V. Torre local neocortical processes - a time for recognition, A. Treves.
We propose an interpretation of the ξ-scaling behavior of nuclear structure functions observed at... more We propose an interpretation of the ξ-scaling behavior of nuclear structure functions observed at Bjorken x > 1 and Q2 ≲ 4 (GeV/ c) 2. We show that at ξ ≳ 1, ξ-scaling might arise accidentally because of the approximate cancellation of two different Q2-dependent effects, namely final state interactions and the effects implicit in the choice of the scaling variable ξ. We provide a new convolution formula for the nuclear structure function in terms of ξ and make predictions for the kinematical regions where final state interactions are expected to be small and the suggested balancing of scaling violations is expected to break down. Our analysis is aimed at the final goal of clarifying the range of applicability of local duality ideas in nuclei.
It has long been recognized that observation of gamma rays originating from nuclear deexcitation ... more It has long been recognized that observation of gamma rays originating from nuclear deexcitation can be exploited to identify neutral-current neutrino-nucleus interactions in water-Cherenkov detectors. We report the results of a calculation of the neutrino- and antineutrino-induced gamma-ray production cross section for oxygen target. Our analysis is focused on the kinematical region of neutrino energy larger than ~200 MeV, in
We briefly review the growing efforts to set up a unified framework for the description of neutri... more We briefly review the growing efforts to set up a unified framework for the description of neutrino interactions with atomic nuclei and nuclear matter, applicable in the broad kinematical region corresponding to neutrino energies ranging between few MeV and few GeV. The emerging picture suggests that the formalism of nuclear many-body theory (NMBT) can be exploited to obtain the neutrino-nucleus cross-sections needed for both the interpretation of oscillation signals and simulations of neutrino transport in compact stars.
The quantitative understanding of neutrino interactions with nuclei and nuclear matter is needed ... more The quantitative understanding of neutrino interactions with nuclei and nuclear matter is needed to the study of many different problems. In the astrophysics environment, neutrino-nucleon and neutrino-nucleus reaction rates are used as inputs in the simulations of phenomena like supernov$\ae$ explosions and neutron star cooling. In the field of neutrino physics, the quantitative knowledge of neutrino-nucleus cross-section is critical to
Experimental studies of hypernuclear dynamics, besides being essential for the understanding of s... more Experimental studies of hypernuclear dynamics, besides being essential for the understanding of strong interactions in the strange sector, have important astrophysical implications. The observation of neutron stars with masses exceeding two solar masses poses a serious challenge to the models of hyperon dynamics in dense nuclear matter, many of which predict a maximum mass incompatible with the data. In this paper, it is argued that valuable new insight can be gained from the forthcoming extension of the experimental studies of kaon electro production from nuclei to include the 208Pb(e,e′K+)Λ208Tl process. A comprehensive framework for the description of kaon electro production, based on factorization of the nuclear cross section and the formalism of the nuclear many-body theory, is outlined. This approach highlights the connection between the kaon production and proton knockout reactions, which will allow us to exploit the available 208Pb(e,e′p)207Tl data to achieve a largely model...
We report the results of a study of neutrino-carbon interactions at beam energies ranging between... more We report the results of a study of neutrino-carbon interactions at beam energies ranging between a few hundred MeV's and a few tens of GeVs carried out within the framework of the impulse approximation using a realistic spectral function. The contributions of quasielastic scattering, resonance production, and deep inelastic scattering-consistently obtained, for the first time, from a model based on a realistic description of the nuclear ground state-are compared and analyzed.
Dynamics of coherence in cortical neural activity, A. Aertsen "Social" behaviour of CNS... more Dynamics of coherence in cortical neural activity, A. Aertsen "Social" behaviour of CNS neurons, E. Alleva learning scenarios - computations and constraints, D. Amit minimum entropy coding as a design principle for sensory processing, J. Atick mathematical theory of early stages of protein folding, H. Bohr interpretation of the cerebellum cortex as a sequence in sequence out device, V. Braitenberg modelling chemical modulation of neuron processes, A. Coolen quark sensitivity of the mammalian cortex - theoretical foundations, B. Denby practical problems using neural networks, F. Fogelman measuring neuronal information transmission with neural networks, J. Hertz drifting chambers tracking with a VLSI neural network, C. Lindsey plasticity and development of the brain, L. Maffei information processing by a perception, N. Parga neural network trigger in the H1 experiment, P. Ribarics capacity control in classifiers for pattern recognition, S. Solla perception of visual motion - computational aspects and neural mechanism, V. Torre local neocortical processes - a time for recognition, A. Treves.
We propose an interpretation of the ξ-scaling behavior of nuclear structure functions observed at... more We propose an interpretation of the ξ-scaling behavior of nuclear structure functions observed at Bjorken x > 1 and Q2 ≲ 4 (GeV/ c) 2. We show that at ξ ≳ 1, ξ-scaling might arise accidentally because of the approximate cancellation of two different Q2-dependent effects, namely final state interactions and the effects implicit in the choice of the scaling variable ξ. We provide a new convolution formula for the nuclear structure function in terms of ξ and make predictions for the kinematical regions where final state interactions are expected to be small and the suggested balancing of scaling violations is expected to break down. Our analysis is aimed at the final goal of clarifying the range of applicability of local duality ideas in nuclei.
It has long been recognized that observation of gamma rays originating from nuclear deexcitation ... more It has long been recognized that observation of gamma rays originating from nuclear deexcitation can be exploited to identify neutral-current neutrino-nucleus interactions in water-Cherenkov detectors. We report the results of a calculation of the neutrino- and antineutrino-induced gamma-ray production cross section for oxygen target. Our analysis is focused on the kinematical region of neutrino energy larger than ~200 MeV, in
We briefly review the growing efforts to set up a unified framework for the description of neutri... more We briefly review the growing efforts to set up a unified framework for the description of neutrino interactions with atomic nuclei and nuclear matter, applicable in the broad kinematical region corresponding to neutrino energies ranging between few MeV and few GeV. The emerging picture suggests that the formalism of nuclear many-body theory (NMBT) can be exploited to obtain the neutrino-nucleus cross-sections needed for both the interpretation of oscillation signals and simulations of neutrino transport in compact stars.
The quantitative understanding of neutrino interactions with nuclei and nuclear matter is needed ... more The quantitative understanding of neutrino interactions with nuclei and nuclear matter is needed to the study of many different problems. In the astrophysics environment, neutrino-nucleon and neutrino-nucleus reaction rates are used as inputs in the simulations of phenomena like supernov$\ae$ explosions and neutron star cooling. In the field of neutrino physics, the quantitative knowledge of neutrino-nucleus cross-section is critical to
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Papers by Omar Benhar