16 Result(s)

Article

Quark Contribution to the Nucleon Polarizabilities and Three-Body Forces

 Lower and upper bounds to the electric polarizability and para-magnetic susceptibility are explicitly calculated by means of a sum-rule technique and within a large variety of constituent quark models. The ro...

E. Biasioli, M. Traini, R. Leonardi in Few-Body Systems (1999)

Article

Quark exchange in deep inelastic scattering

We use a model for baryons that links the constituent structure to the deep inelastic (current) properties. The approach consists in a laboratory partonic description (based on a model of hadron structure), to...

P. González, V. Vento, M. Traini… in Zeitschrift für Physik A Hadrons and Nuclei (1995)

Article

Separation of longitudinal and transverse structure functions in (e, e′) quasi-elastic scattering off nuclei including Coulomb corrections

The inclusion of Coulomb corrections prevents separation of the longitudinal and transverse components of the (e, e′) inclusive quasi-elastic scattering off heavy nuclei. Approximated methods to account for Co...

M. Traini in Il Nuovo Cimento A (1965-1970) (1995)

Article

Quasi-elastic electron scattering off nuclei: a study of Coulomb distortion effects

The inclusive quasi-elastic electron scattering off¹⁶O,⁴⁰Ar,²⁰⁸Pb and²³⁸U is studied including the distortion of the incoming and outgoing electron wave due to Coulomb interaction with the nuclear charge. The tot...

M. Traini, M. Covi in Il Nuovo Cimento A (1965-1970) (1995)

Article

Deep inelastic electron scattering off nuclei and dynamically generated parton distributions

A study of deep inelastic electron-nucleus scattering is presented. The approach assumes that the non-perturbative component of the parton distributions can be approximated by constituent quark model wave func...

L. Conci, M. Traini in Il Nuovo Cimento A (1965-1970) (1993)

Article

Partons and effective quark masses

We study the link between the constituent quark masses and the parton distributions extracted from high-energy deep inelastic lepton-nucleon scattering. To this end the valence distributions at low-resolution ...

M. Traini, L. Conci, M. Melchiori in Il Nuovo Cimento A (1965-1970) (1992)

Article

Quark momentum distribution in nucleons

The momentum distributions of constituent quarks in nucleons are studied within the framework of non-relativistic quark models for baryons. The corrections due to one-gluon-exchange effects are discussed compa...

L. Conci, M. Traini in Few-Body Systems (1990)

Article

A study of the Thomas-Reiche-Kuhn sum rule in finite nuclei

In the present paper we have evaluated the TRK sum rule in spherical nuclei using many variants of realistic potentials. The crucial role of correlations has been discussed, even for the most recent parametriz...

M. Traini, G. Orlandini, R. Leonardi in La Rivista del Nuovo Cimento (1978-1999) (1987)

Article

Nucleon momentum distributions in doubly closed shell nuclei

The momentum distributions in nuclei like⁴He,¹⁶O and⁴⁰Ca are explicitly calculated within a phenomenological model which includes dynamical short range and tensor correlation effects. The common behaviour of such...

M. Traini, G. Orlandini in Zeitschrift für Physik A Atoms and Nuclei (1985)

Article

Role of tensor correlations in the longitudinal and transverse nuclear responses to isovector spin probes

The role of short-range and tensor correlations in spin isospin longitudinal (q·σ) and transverse (q×σ) responses of a finite nucleus is studied in detail by using a sum rule approach. The tensor effects concur i...

R. Ferrari, G. Orlandini, M. Traini in Il Nuovo Cimento A (1965-1970) (1984)

Article

Role of tensor correlations in inclusive electron scattering processes

Dynamical-correlation effects are studied in relation to both elastic and inelastic electron scattering processes, using a sum rule approach. The role of tensor correlations turns out to be important especiall...

G. Orlandini, M. Traini, F. Dellagiacoma in Il Nuovo Cimento A (1965-1970) (1983)

Article

A microscopic evaluation of the nuclear dipole polarizability

The dipole polarizability sum rule has been evaluated by means of a restricted Hartree-Fock approach. The method leads to a simple and analytical expression for the dipole polarizability. Explicit calculations...

E. Lipparini, G. Orlandini, S. Stringari, M. Traini in Il Nuovo Cimento A (1965-1970) (1977)

Article

Skyrme’s interaction and corrections to gyromagnetic factors

E. Lippaeini, S. Stringari, M. Traini in Lettere al Nuovo Cimento (1971-1985) (1977)

Article

Sum rule approach to radiative pion capture in nuclei

The radiative pion capture in nuclei has been studied by sum rules techniques. Two simple sum rules for the radiative-capture rates from 1s and 2p orbits are given in terms of the mean photon momentum, the nuclea...

E. Lipparini, S. Stringari, M. Traini in Il Nuovo Cimento A (1965-1970) (1976)

Article

M1 strength distribution in nuclei

TheM1-transitions in nuclei are studied by means of sum rules. A useful sum rule for the total strength of theM1-excitations is given in terms of the number of the nucleons which are in the nonfilledl-shell. The ...

E. Lipparini, S. Stringari, M. Traini, R. Leonardi in Il Nuovo Cimento A (1965-1970) (1976)