منابع مشابه
Extraction of the pi NN coupling constant from NN scattering data.
We reexamine Chew’s method for extracting the πNN coupling constant from np differential cross section measurements. Values for this coupling are extracted below 350 MeV, in the potential model region, and up to 1 GeV. The analyses to 1 GeV have utilized 55 data sets. We compare these results to those obtained via χ mapping techniques. We find that these two methods give consistent results whic...
متن کاملpi NN coupling constants from NN elastic data between 210 and 800 MeV.
High partial waves for pp and np elastic scattering are examined critically from 210 to 800 MeV. Non-OPE contributions are compared with predictions from theory. There are some discrepancies, but sufficient agreement that values of the πNN coupling constants g 2 0 for π 0 exchange and g 2 c for charged π exchange can be derived. Results are g 2 0 = 13.91 ± 0.13 ± 0.07 and g 2 c = 13.69 ± 0.15 ±...
متن کاملPion-nucleon scattering and the pi NN coupling constant in the chiral color dielectric model.
We apply the chiral color dielectric model to lowand medium-energy scattering within the coupled πN and π∆ system. Dynamic baryon states in which quarks are confined by the scalar color-dielectric field are constructed in Fock space. Spurious motion of the center of mass is eliminated by constructing momentum eigenstates via a Peierls-Yoccoz projection. The relativistic Lippmann-Schwinger equat...
متن کاملConstraints on the Πnn Coupling Constant from the Nn System
The sensitivity of the deuteron and of pp scattering to the πNN and ρNN coupling constants is investigated systematically. We find that the deuteron can be described about equally well with either large π and ρ or small π and ρ coupling constants. However, pp scattering clearly requires the strong ρ, but favors the weak π (particularly, in 3P0 at low energies). This apparent contradiction betwe...
متن کاملStrong Coupling Phenomena on the Noncommutative Plane
We study strong coupling phenomena in U(1) gauge theory on the noncommutative plane. To do so, we make use of a T-dual description in terms of an N → ∞ limit of U(N) gauge theory on a commutative torus. The magnetic flux on this torus is taken to be m = N − 1, while the area scales like 1/N , keeping ΛQCD fixed. With a few assumptions, we argue that the speed of high frequency light in pure non...
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ژورنال
عنوان ژورنال: The European Physical Journal A
سال: 2016
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epja/i2016-16114-2