Results 241 to 250 of about 84,997 (274)

Pion, pion-pion, and pion-nucleus interactions

Physics of Atomic Nuclei, 2002
This survey is devoted to describing the early studies of I.I. Gurevich on pion physics that were performed by the photoemulsion method and the studies of the pion-pion interaction that were made by his colleagues on the basis of the hydrogen-bubble-chamber and the magnetic-spectrometer method (as well as on the basis of the photoemulsion method).
Konstantin N. Mukhin, V. N. Tikhonov, O. O. Patarakin   +2 more
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Pion-pion scattering in the two-pion exchange approximation [PDF]

Il Nuovo Cimento, 1962
The results of a calculation of pion-pion scattering in two-pion exchange approximation are presented. IfS andP-waves are subtracted and iftmax≲16 andsmax≲1 600 the equations converge. It is found that there is little alteration in the low-energy solutions obtained in an earlier calculation using Legendre polynomial expansions to determine the left cut.
B. H. Bransden, J. W. Moffat
openaire   +1 more source

Pion-Nucleon Scattering and Pion-Pion Interactions

Physical Review, 1962
Low energy $s$- and $p$-wave $\ensuremath{\pi}\ensuremath{-}N$ scattering is analyzed by partial wave dispersion relations. From the experimental $\ensuremath{\pi}\ensuremath{-}N$ phase shifts we derive the "discrepancies" in the physical energy region and on the crossed cut.
JAMES HAMILTON, MENOTTI, PIETRO, GEOFFREY OADES, LENCE VICK   +3 more
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On the photoproduction of pions on pions

Il Nuovo Cimento, 1962
An integral equation for the amplitude of the photoproduction of pions on pions is derived from unitarity and Mandelstam representation. An iteration technique for obtaining approximate solutions is adopted and illustrated by assuming a sharp pion-pion resonance in theP ...
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Pion Softening and Pion Condensation

Physics of Atomic Nuclei, 2020
In this paper after a historical introduction I discuss ideas of a pion softening and pion condensation in a dense nuclear matter, in particular in neutron stars, and a conjecture about a feasible existence of abnormal nuclei.
D. N. Voskresensky, D. N. Voskresensky
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Pion-Pion and Pion-Kaon Scattering

Physical Review, 1960
The pseudopotential method is used to calculate that low-lying excitation energies of a Bose gas of hard spheres at T = 0 to an order beyond that previously calculated by this technique. The results are in agreement with those obthined by Beliaev using a different approach. The phonon velocity is found to be equal to the velocity of compressional waves
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Pion Production and the Pion-Pion Interaction

Physical Review Letters, 1959
The cross sections for pi /sup -/ + p yields pi /sup -/ + pi /sup +/ + n at inc ident energies between 260 and 430 have been measured in a previous expeniment. A theoretical interpretation of these results is presented. An attempt is made to fit the results by using a direct pion-pion interaction.
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The S Wave Pion-Pion Interaction

Proceedings of the Physical Society, 1961
The pion-pion interaction has been studied with an explicit appeal to the standard quantum field theory. Lowest order perturbation theory calculations indicate that the usual renormalization procedure may imply an indefinite quantization metric. An alternative procedure, using a regulator cut-off near the nucleon mass, is therefore adopted, and on this
G R Allcock, A N Kamal
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