scholarly journals GRAPHS OF SCATTERED PARTICLE ENERGIES VS SCATTERING ANGLES, AND GRAPHS OF CENTER-OF-MASS SCATTERING ANGLES VS LABORATORY SCATTERING ANGLES FOR NUCLEON--NUCLEON REACTIONS FROM 25 TO 3500 MeV AND FOR PION--NUCLEON REACTIONS FROM 25 TO 2500 MeV.

1967 ◽  
Author(s):  
H.W. Bertini ◽  
M.P. Guthrie ◽  
E.H. Pickell
Keyword(s):  
Center Of Mass ◽  
Nucleon Nucleon ◽  
Scattered Particle ◽  
Pion Nucleon

scholarly journals Nucleon-nucleon interaction from pion-nucleon phase shift analysis

1973 ◽  
Vol 44 (1) ◽  
pp. 1-4 ◽  
Author(s):  
R. Vinh Mau ◽  
J.M. Richard ◽  
B. Loiseau ◽  
M. Lacombe ◽  
W.N. Cottingham
Keyword(s):  
Phase Shift ◽  
Nucleon Nucleon ◽  
Phase Shift Analysis ◽  
Nucleon Interaction ◽  
Shift Analysis ◽  
Pion Nucleon ◽  
Nucleon Nucleon Interaction

Giant dipole resonance in 4He

1980 ◽  
Vol 58 (11) ◽  
pp. 1555-1559 ◽  
Author(s):  
J. J. Bevelacqua
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Giant Dipole Resonance ◽  
Reasonable Agreement ◽  
Center Of Mass ◽  
Nucleon Nucleon ◽  
Nucleon Interaction ◽  
R Matrix ◽  
Dipole Resonance ◽  
Nucleon Nucleon Interaction

The 4He giant dipole resonance is calculated with the generalized R-matrix method of Lane and Robson. The model treats the center of mass correctly and includes noncentral components in the nucleon–nucleon interaction via the Sussex interaction. The 4He(γ,p)3H and 4He(γ,n)3He cross sections are sensitive to the 4He level spectrum, but are in reasonable agreement with the photonuclear data for level schemes which agree with the spectrum suggested by Fiarman and Meyerhof (FM). Other spectra which bracket the FM levels lead to poorer photonuclear cross sections. R-matrix model results also lead to a (γ,p)/(γ,n) cross section ratio which is about unity.

A QUARK-MODEL FIT FOR THE ELECTROMAGNETIC PROPERTIES OF OCTET BARYONS

1992 ◽  
Vol 07 (12) ◽  
pp. 2841-2861 ◽  
Author(s):  
S. N. JENA ◽  
S. PANDA
Keyword(s):  
Quark Model ◽  
Magnetic Moments ◽  
Center Of Mass ◽  
Axial Vector ◽  
Form Factors ◽  
Electromagnetic Properties ◽  
Coupling Constant ◽  
Vector Coupling ◽  
Pion Nucleon ◽  
Octet Baryons

A simple independent-quark model based on the Dirac equation with an equally mixed scalar–vector linear confining potential model is used to obtain a fit for the electromagnetic properties — like the magnetic moments, charge radii and axial-vector coupling-constant ratios — of octet baryons, taking into account the appropriate center-of-mass corrections. This fit is extended to include the quark-core contributions to the nucleon electromagnetic form factors [Formula: see text], [Formula: see text], [Formula: see text] and the axial-vector form factor GA(q2). The respective root-mean-square radii associated with [Formula: see text] and GA(q2) come out as [Formula: see text] and [Formula: see text]. The possibility of restoring in this model the chiral symmetry in the usual way is discussed and the pion-nucleon coupling constant is found as gπ NN = 13.72 as compared to (gπ NN ) exp ≃ 13.

scholarly journals Azimuthally Integrated HBT Parameters for Charged Pions in Nucleus-Nucleus Interactions versus Collision Energy

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
V. A. Okorokov
Keyword(s):  
Energy Dependence ◽  
Reasonable Agreement ◽  
Collision Energy ◽  
Center Of Mass ◽  
Nucleon Nucleon ◽  
Emission Region ◽  
Smooth Approximation ◽  
Nuclear Collisions ◽  
Charged Pions ◽  
Measurement Uncertainties

The energy dependence of spatiotemporal characteristics of particle emission region is studied for charged pions produced in nuclear collisions. No dramatic change is observed for the HBT parameters with increasing of the center-of-mass (c.m.) energy per nucleon-nucleon pair,sNN, forsNNof a few GeV to a few TeV. The emission duration is obtained to be almost independent of the c.m. energy within the measurement uncertainties. The analytic function is suggested for a smooth approximation of the energy dependence of the main HBT parameters. The fits demonstrate reasonable agreement with the experimental data. Predictions are made for future LHC and FCC experiments.

scholarly journals Two-Pion Exchange Nuclear Potential — Chiral Cancellations

1997 ◽  
Vol 06 (01) ◽  
pp. 83-88 ◽  
Author(s):  
J.-L. Ballot ◽  
M. R. Robilotta ◽  
C. A. da Rocha
Keyword(s):  
Chiral Symmetry ◽  
Nucleon Nucleon ◽  
Pion Exchange ◽  
Nuclear Potential ◽  
Nucleon Interaction ◽  
Nucleon Scattering ◽  
Pion Nucleon ◽  
Nucleon Nucleon Interaction

We show that chiral symmetry is responsible for large cancellations in the two-pion exchange nucleon-nucleon interaction, which are similar to those occurring in free pion-nucleon scattering.

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