Nuclear wave function considerations in pion photoproduction

1986 ◽  
Vol 33 (6) ◽  
pp. 2194-2196 ◽  
Author(s):  
M. K. Singham
Keyword(s):  
Wave Function ◽  
Pion Photoproduction ◽  
Nuclear Wave Function

Effect of Short Range Correlations in Charged Pion Photoproduction from 16O

1975 ◽  
Vol 53 (13) ◽  
pp. 1292-1298 ◽  
Author(s):  
K. Srinivasa Rao ◽  
V. Devanathan
Keyword(s):  
Wave Function ◽  
Correlation Function ◽  
Short Range ◽  
Unitary Operator ◽  
Charged Pion ◽  
Pion Photoproduction ◽  
Nuclear Wave Function ◽  
Positive Pion ◽  
Short Range Correlations

Short range correlations in nuclei are introduced into the nuclear wave function using a unitary operator whose form was originally suggested by Villars. Their effect on positive pion photoproduction from 16O is found to be small for the correlation function we have assumed.

The Two-Nucleon Mechanism for the Neutrinoless Double Beta Decay and the BCS Nuclear Wave Function

1994 ◽  
Vol 21 (4) ◽  
pp. 447-454
Author(s):  
Zhong-Jin Lin ◽  
You-Ping Gan ◽  
De-Ji Fu ◽  
Hui-Fang Wu ◽  
Chong-En Wu
Keyword(s):  
Wave Function ◽  
Beta Decay ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Nuclear Wave Function

scholarly journals Electronic non-adiabatic states: towards a density functional theory beyond the Born–Oppenheimer approximation

2014 ◽  
Vol 372 (2011) ◽  
pp. 20130059 ◽  
Author(s):  
Nikitas I. Gidopoulos ◽  
E. K. U. Gross
Keyword(s):  
Wave Function ◽  
Density Functional ◽  
Adiabatic Approximation ◽  
Complete System ◽  
Wave Functions ◽  
Nuclear Wave Function ◽  
Functional Theory ◽  
Novel Treatment ◽  
Oppenheimer Approximation ◽  
Adiabatic Case

A novel treatment of non-adiabatic couplings is proposed. The derivation is based on a theorem by Hunter stating that the wave function of the complete system of electrons and nuclei can be written, without approximation, as a Born–Oppenheimer (BO)-type product of a nuclear wave function, X ( R ), and an electronic one, Φ R ( r ), which depends parametrically on the nuclear configuration R . From the variational principle, we deduce formally exact equations for Φ R ( r ) and X ( R ). The algebraic structure of the exact nuclear equation coincides with the corresponding one in the adiabatic approximation. The electronic equation, however, contains terms not appearing in the adiabatic case, which couple the electronic and the nuclear wave functions and account for the electron–nuclear correlation beyond the BO level. It is proposed that these terms can be incorporated using an optimized local effective potential.

scholarly journals Initial state and thermalization in the Color Glass Condensate framework

2015 ◽  
Vol 24 (10) ◽  
pp. 1530008 ◽  
Author(s):  
François Gelis
Keyword(s):  
Wave Function ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Color Glass ◽  
Color Glass Condensate ◽  
Nuclear Wave Function ◽  
Initial State ◽  
Early Stages ◽  
Ion Collisions

In this review, I present the description of the early stages of heavy ion collisions at high energy in the Color Glass Condensate framework, from the pre-collision high energy nuclear wave function to the point where hydrodynamics may start becoming applicable.

scholarly journals A TIME-DEPENDENT MULTI-DETERMINANT APPROACH TO NUCLEAR DYNAMICS

2013 ◽  
Vol 22 (06) ◽  
pp. 1350040 ◽  
Author(s):  
G. PUDDU
Keyword(s):  
Wave Function ◽  
Time Evolution ◽  
Krylov Subspace ◽  
Equations Of Motion ◽  
Strength Function ◽  
Time Dependent ◽  
Nuclear Wave Function ◽  
Nuclear Dynamics ◽  
Hartree Fock

We propose a Time-Dependent Multi-Determinant (TDMD) approach to the description of the time evolution of the nuclear wave functions. We use the Dirac variational principle to derive the equations of motion using as ansatz for the nuclear wave function a linear combination of Slater determinants. We prove explicitly that the norm and the energy of the wave function are conserved during the time evolution. This approach is a generalization of the time-dependent Hartree–Fock method to many Slater determinants. We apply this approach to a case study of 6 Li using the N3LO interaction renormalized to four major harmonic oscillator shells. We solve the TDMD equations of motion using Krylov subspace methods of Lanczos type. As an application, we discuss the isoscalar monopole strength function.

THE ROLE OF FERMI MOTION ON THE STRUCTURE FUNCTIONS OF 3He AND 3H NUCLEI IN THE QUARK EXCHANGE FRAMEWORK

2013 ◽  
Vol 22 (06) ◽  
pp. 1350037 ◽  
Author(s):  
M. MODARRES ◽  
M. RASTI
Keyword(s):  
Experimental Data ◽  
Wave Function ◽  
Three Dimensional ◽  
Structure Functions ◽  
Exchange Model ◽  
Coordinate Space ◽  
Nuclear Wave Function ◽  
Fermi Motion ◽  
Nucleon Wave Function

The quark exchange model and the full three-nucleon wave function in the configuration space are used to evaluate the role of Fermi motion on the structure functions (SFs) of helium-3 and tritium nuclei. The three-nucleon wave function is obtained from the solution of the Faddeev equations with the Malfliet–Tjon-type potential, by using the three-dimensional approach as a function of the magnitudes of the Jacobi momenta vectors and the angle between them. In this calculation, the initial valence quarks inputs are taken from the GRV's (Glück, Reya and Vogt) fitting procedure and the next-to-leading order (NLO) QCD calculation on [Formula: see text], which give a very good fit to the available experimental data in the (x, Q2)-plane. The role of Fermi motion on the EMC ratio of the SFs of 3 He and 3 H nuclei are analyzed through the NLO expansion of the nuclear wave function in the coordinate space. A good agreement between the calculated EMC ratios, the corresponding experimental data and the theoretical results is found. Finally, the ratios of the SFs of the neutron to the proton (with the isospin symmetry assumption) with and without the Fermi motion effect, are also calculated, and they are compared with the available experimental data. Our results show that the roles of the Fermi motion in the framework of the quark exchange model for the calculations of the nuclear SFs are important.

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