42506674
Neutrino magnetic moment effects in neutrino nucleus reactions.
Some low energy neutrino nucleus reactions induced by neutrinos (antineutrinos) having a magnetic moment of the order of 10{sup {minus}9}{minus}10{sup {minus}10} Bohr magneton are studied. It is found that in the case of {sup 4}He, {sup 12}C, and {sup 16}O, the detection of very low energy scalar and isoscalar elastic and inelastic reactions induced by the isoscalar vector currents can provide a better limit on the neutrino magnetic moment.
119224389
A study of nuclear effect in F(3) structure function in the deep inelastic nu(anti-nu) reactions in nuclei
We study nuclear effect in the F3A(x) structure function in the deep inelastic neutrino reactions on iron by taking into account Fermi motion, binding, target mass correction, shadowing and anti‐shadowing corrections. Calculations have been done in a local density approximation using relativistic nuclear spectral functions which include nucleon correlations for nuclear matter. Results for F3A(x) have been compared with the results reported at NuTeV and also with some of the older experiments reported in the literature.
16740684
Inclusive muon capture in light nuclei
We study total muon capture rates in light(A similar to 6-18) nuclei, taking into account renormalizations of the nuclear vector and axial vector strengths. We estimate the influence in the results of uncertainties of the spin-isospin interaction parameter g' and nuclear densities. A few of these reactions are theoretical benchmarks for physics involving searches for neutrino oscillations. New experiments in muon capture in several targets are suggested, in the Light of some discrepancies with theory, crudeness of some experimental results and relevance to neutrino physics. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
118620385
Nuclear effects in F3 structure function of nucleon
Abstract We study nuclear effects in the F 3 A ( x ) structure function in the deep inelastic neutrino reactions on iron by using a relativistic framework to describe the nucleon spectral functions in the nucleus. The results for the ratio R ( x , Q 2 ) = F 3 A ( x , Q 2 ) A F 3 N ( x , Q 2 ) and the Gross–Llewellyn Smith (GLS) integral G ( x , Q 2 ) = ∫ x 1 d x F 3 A ( x , Q 2 ) in nuclei are discussed and compared with the recent results available in literature from theoretical and phenomenological analyses of experimental data.
122360771
Threshold pion photoproduction on 6Li
Abstract The α-d cluster model which satisfactorily explains the electron scattering data is applied to study the threshold pion photoproduction on 6 Li. The results demonstrate that the existing theoretical situation is not improved merely by having a better description of the target.
125104920
Nuclear effects in the structure functions
By using a relativistic framework and accurate nuclear spectral function the structure functions F2A andF3A of deep inelastic charged lepton and neutrino scattering are calculated in nuclei and results are presented.
40983341
Nucleus-nucleus multiplicity distributions and quantum chromodynamics.
A model for nucleus-nucleus multiplicity distributions is proposed and its relations with hadron-proton and hadron-nucleus multiplicity distributions are explored and compared with the experimental data. The values of the parameters are the same for all these processes and owe their origin to the quantum chromodynamical gluon bremsstrahlung mechanism. Some other consequences of the model are also analyzed and compared with the available experimental data.
22845460
Birkhoff's theorem for electromagnetic fields in a new scalar-tensor theory.
A result having formal similarity to Birkhoff's theorem in general relativity is proved in the presence of electromagnetic fields in a new scalar-tensor theory of gravitation proposed by Schmidt et al. for the special case when the scalar field is massless and independent of time.
37575993
Coulomb excitation studies in antimony isotopes.
Various low-lying energy levels up to 1.145 MeV in {sup 121,123}Sb have been Coulomb excited using 3.0--4.0 MeV proton-beam energies. The reduced transition probabilities of the excited levels have been newly deduced from the measured yields of the deexcitation gamma rays. The values of mixing ratios for a few transitions and the removal of ambiguities in the spin values of some levels have been presented from the angular distribution analysis.
32129688
Systematics of preequilibrium contributions in (n,p) reactions at 14 MeV.
The existing up to data global data on angle integrated energy spectra (AIES) and energy integrated angular distributions (EIAD) of protons from ([ital n],[ital p]) reactions at 14 MeV nominal neutron energy have been analyzed to develop systematics in relative preequilibrium contributions (RPC). The experimental estimates of RPC were obtained either from asymmetric components of the extrapolated EIAD or from the analysis of AIES, by comparison with equilibrium contributions obtained from the Hauser-Feshbach model. The experimentally obtained RPC have been compared with those expected from recent Feschbach-Kerman-Koonin theory as extended by Kalbach [ital et] [ital al]. as well as with theoretical predictions by Brown and Muirhead. The mass number systematics of RPC manifest shell and even-odd effects. The fraction of the precompound nucleus decays obtained from RPC, using the Blann-Griffin model, is constant and small for [ital A][ge]72, and increases to about 1 for small [ital A]'s. The analysis with the Kalbach model yields the dependence of the level density parameters [ital a][sub 1] and [ital a][sub 2] on [ital A]; also values of [ital a][sub 1] and [ital a][sub 2] manifest prominent structures near closed shell nuclei. The values of [ital a][sub 1] for compound nucleus are systematically highermore » than [ital a][sub 2], for the residual nuclei by an amount much larger than expected by usual [ital A] dependence, indicating excitation energy dependence of the single particle level density [ital g]. The excitation energy dependence of [ital g] when explored in the light of Rosenzweig's positive power law, with parameters [ital n] and [ital k], reveals that for most cases 1.2[le][ital n][le]1.5, with no systematic dependence of [ital n] on [ital A], compared to reported theoretical values of [ital n][congruent]1.6 by Rosenzweig, and 0.8[le][ital k][le]3.8 with a trend of slow increase of [ital k] with [ital A].« less
35249306
Quantum violation of stochastic noncontextual hidden-variable theories.
We formulate stochastic noncontextual hidden-variable theories. In such theories the hidden state λ specifies not definite values, but expectation values A − (λ), ... of observables A, ... and noncontextuality means that A − (λ) is independent of which other commuting observables commuting with A are measured together with A. We show via Bell inequalities that such theories conflict with quantum theory and propose a two-photon experimental test. We also show that for a single particle of spin (2 n −1)/2, quantum violation of classical noncontextuality grows exponentially with n.