A possible model for a strong interaction in theP 11 pion-nucleon state

1965 ◽  
Vol 36 (3) ◽  
pp. 1052-1054
Author(s):  
A. B. Clegg
Keyword(s):  
Strong Interaction ◽  
Pion Nucleon ◽  
Nucleon State

scholarly journals THE ROLE OF Δ(1232) IN TWO-PION EXCHANGE THREE-NUCLEON POTENTIAL

2000 ◽  
Vol 09 (02) ◽  
pp. 157-168 ◽  
Author(s):  
K. KABIR ◽  
T. K. DATTA ◽  
MUSLEMA PERVIN ◽  
L. M. NATH
Keyword(s):  
Field Theory ◽  
Scattering Amplitudes ◽  
Binding Energy ◽  
Strong Interaction ◽  
Pion Exchange ◽  
Nucleon Potential ◽  
A Value ◽  
Lagrangian Field Theory ◽  
Pion Nucleon

In this paper we have studied the two-pion exchange three-nucleon potential (2πE-3NP) using an approximate SU(2)×SU(2) chiral symmetry of the strong interaction. The off-shell pion-nucleon scattering amplitudes obtained from the Weinberg Lagrangian are supplemented with contributions from the well-known σ-term and the Δ(1232) exchange. It is the role of the Δ-resonance in 2πE-3NP, which we have investigated in detail in the framework of the Lagrangian field theory. The Δ-contribution is quite appreciable and, more significantly, it is dependent on a parameter Z which is arbitrary but has the empirical bounds |Z|≤1/2. We find that the Δ-contribution to the important parameters of the 2πE-3NP depends on the choice of a value for Z, although the correction to the binding energy of triton is not expected to be very sensitive to the variation of Z within its bounds.

scholarly journals The Nucleon Ground State

1979 ◽  
Vol 32 (5) ◽  
pp. 525
Author(s):  
EK Rose ◽  
JL Cook ◽  
E Clayton
Keyword(s):  
Probability Density ◽  
Ground State ◽  
State Potential ◽  
Pion Nucleon ◽  
Overlap Matrix ◽  
Nucleon State ◽  
Infinite Set ◽  
Nonlocal Potentials

From the parameters obtained in a previous paper for the Pll pion-nucleon state, the ground state potential is determined and the meson probability density is calculated. The results hold for the simplest form of the overlap matrix and are phase-equivalent to an infinite set of nonlocal potentials.

scholarly journals Pionic hydrogen and deuterium

2021 ◽  
Author(s):  
Detlev Gotta ◽  
L. M. Simons
Keyword(s):  
High Resolution ◽  
Effective Field Theories ◽  
Strong Interaction ◽  
Pion Production ◽  
Effective Field ◽  
Low Energy ◽  
Field Theories ◽  
Pionic Hydrogen ◽  
Pion Nucleon ◽  
Scattering Lengths

The measurement of strong-interaction shift and broadening in pionic hydrogen and deuterium yields pion-nucleon scattering lengths as well as the threshold pion-production strength on isoscalar NN pairs. Results from recent high-resolution experiments at PSI using crystal spectrometers allow important comparisons with the outcome of the modern low-energy description of QCD within the framework of effective field theories.

scholarly journals A boundary-condition model for theP 33 pion-nucleon state

1966 ◽  
Vol 43 (4) ◽  
pp. 817-833
Author(s):  
A. H. Huffman ◽  
E. L. Lomon
Keyword(s):  
Boundary Condition ◽  
Condition Model ◽  
Boundary Condition Model ◽  
Pion Nucleon ◽  
Nucleon State

scholarly journals Study of the Strong Interaction Among Hadrons with Correlations at the LHC

2021 ◽  
Vol 71 (1) ◽  
pp. 377-402
Author(s):  
L. Fabbietti ◽  
V. Mantovani Sarti ◽  
O. Vázquez Doce
Keyword(s):  
Strong Interaction ◽  
Momentum Space ◽  
Nucleon Nucleon ◽  
New Method ◽  
Alice Collaboration ◽  
The Past ◽  
Pion Nucleon ◽  
Nucleon Interactions

The strong interaction among hadrons has been measured in the past by scattering experiments. Although this technique has been extremely successful in providing information about the nucleon–nucleon and pion–nucleon interactions, when unstable hadrons are considered the experiments become more challenging. In the last few years, the analysis of correlations in the momentum space for pairs of stable and unstable hadrons measured in pp and p+Pb collisions by the ALICE Collaboration at the LHC has provided a new method to investigate the strong interaction among hadrons. In this article, we review the numerous results recently achieved for hyperon–nucleon, hyperon–hyperon, and kaon–nucleon pairs, which show that this new method opens the possibility of measuring the residual strong interaction of any hadron pair.

Conformation and electronic structure of aromatic chloroformates

1987 ◽  
Vol 52 (4) ◽  
pp. 970-979 ◽  
Author(s):  
Otto Exner ◽  
Pavel Fiedler
Keyword(s):  
Electronic Structure ◽  
Oxygen Atom ◽  
Strong Interaction ◽  
Electron Distribution ◽  
Room Temperature ◽  
Functional Group ◽  
Dipole Moments ◽  
Carbonyl Oxygen ◽  
Nonpolar Solvents ◽  
Single Method

Aromatic chloroformates Ib-Ie were shown to exist in the ap conformation, in agreement with aliphatic chloroformates, i.e. the alkyl group is situated cis to the carbonyl oxygen atom as it is the case in all esters. While 4-nitrophenyl chloroformate (Ie) is in this conformation in crystal, in solution at most several tenths of percent of the sp conformation may be populated at room temperature and in nonpolar solvents only. A new analysis of dipole moments explained the previous puzzling results and demonstrated the impossibility to determine the conformation by this single method, in consequence of the strong interaction of adjoining bonds. If, however, the ap conformation is once proven, the dipole moments reveal some features of the electron distribution on the functional group, characterized by the enhanced polarity of the C-Cl bond and reduced polarity of the C=O bond. This is in agreement with the observed bond lengths and angles.

Quark mass differences and isospin violation in the pion-nucleon coupling constants

1989 ◽  
Vol 39 (5) ◽  
pp. 2054-2056 ◽  
Author(s):  
Véronique Bernard ◽  
Ulf-G. Meissner
Keyword(s):  
Quark Mass ◽  
Coupling Constants ◽  
Isospin Violation ◽  
Pion Nucleon
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