Results 181 to 190 of about 210,176 (213)
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Pion-Pion Interaction in Electromagnetic Processes
Physical Review, 1960The correction to the photon propagator due to the emission of a virtual pion pair is evaluated considering the effect of the strong pion-pion interaction in the J = 1, T = 1 state of the pions recently discussed by several authors. Results are given for different sets of parameters describing the pion form factor, and the pcssibility of investigating ...
BROWN L. M, CALOGERO, Francesco
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Pion Production in Pion-Nucleon Collisions and the Pion-Pion Interaction
Physical Review, 1962Momentum distributions of the pions of all charge states produced in the interaction of 960-Mev pi /sup -/ mesons with protons are calculated assuming a primary pi pi interaction followed by a pi -N interaction with excitation of the (3,3) isobar state of the nucleon. Predicted spectra are in reasonable agreement with experimental data when the pi - pi
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Pion-induced pion production on the deuteron
Physical Review C, 1986Pion-induced pion production on the deuteron was studied via the reactions d pp and d nn. The doubly differential cross sections for these reactions were measured, covering the center-of-mass phase space at incident pion energies of 256, 331, and 450 MeV.
, Lichtenstadt +9 more
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On the photoproduction of pions on pions
Il Nuovo Cimento, 1962An 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-induced pion production in nuclei
Physical Review C, 1997The process of pion-induced pion production in nuclei has been studied with the A(π+,π+π-) and A(π+,π+π-p) reactions for four nuclei 2H, 12C, 40Ca, and 208Pb at an incident pion energy of Tπ+=283 MeV. The π+π- and π+π-p particles in the final state were detected in coincidence with the CHAOS spectrometer at TRIUMF.
BONUTTI, FAUSTINO +17 more
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Pion-pion scattering in the two-pion exchange approximation
Il Nuovo Cimento, 1962The 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.
Brandsden, B. H., Moffat, J. W.
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THE QUARK MODEL PION AND THE GOLDSTONE PION
Nuclear Physics A, 1982Abstract An approximate vacuum wave-function for massless quarks is proposed which describes a collective. Goldstone pion with the internal structure of a quark model pion.
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Evidence Concerning Pion-Pion Interactions below the 765-Mev Pion-Pion Resonance
Physical Review, 1962A search has been made for pion-pion resonances in the reaction ${\ensuremath{\pi}}^{\ensuremath{-}}+p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}+{\ensuremath{\pi}}^{0}+p$ at incident pion energies of 871 Mev and 775 Mev, using a sodium-iodide luminescent chamber as a detector. The spectra of ${m}^{*}$, the total energy of the two pions
C. Clyde Peck +2 more
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International Journal of Radiation Oncology*Biology*Physics, 1982
Clinical treatments at TRIUMF started in November, 1979. Ten patients with malignant subcutaneous nodules had 14 lesions treated with pions and 37 other nodules treated with 280 kV X rays. Three different fractionation regimens were used with X ray doses spanning the expected RBE range of pions.
G B, Goodman +6 more
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Clinical treatments at TRIUMF started in November, 1979. Ten patients with malignant subcutaneous nodules had 14 lesions treated with pions and 37 other nodules treated with 280 kV X rays. Three different fractionation regimens were used with X ray doses spanning the expected RBE range of pions.
G B, Goodman +6 more
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Pion Softening and Pion Condensation
Physics of Atomic Nuclei, 2020In 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.
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