Pion double charge exchange on /sup 4/He and meson exchange currents

Journal Article · Mon Sep 14 00:00:00 EDT 1981 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.47.782· OSTI ID:6167427

Stetz, A; Swenson, L W; Davis, J; Kaellne, J; Minehart, R C; Whitney, R R; Perez-Mendez, V; Sagle, A; Carroll, J; McClelland, J B; Faucett, J

We have measured the differential cross section d/sup 2/sigma/d..cap omega.. dT and estimated the total cross section sigma/sub T/ for the double charge exchange reaction /sup 4/He(..pi../sup +/,..pi../sup -/)4p at 140, 200, and 295 MeV. The values for sigma/sub T/ are at least an order of magnitude larger than predictions based on sequential single charge exchange ..pi..-N scatterings. It is possible, therefore, that /sup 4/He(..pi../sup +/,..pi../sup -/) is dominated by other processes, such as the formation of a ..delta.. in the intermediate state or scattering from meson exchange currents.

• Research Organization: Oregon State University, Corvallis, Oregon 97331
• OSTI ID: 6167427
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 47:11
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
HELIUM 4 TARGET
PION PLUS REACTIONS
CHARGE-EXCHANGE REACTIONS
DIFFERENTIAL CROSS SECTIONS
EXPERIMENTAL DATA
MEV RANGE 100-1000
PHASE SPACE
TOTAL CROSS SECTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
ENERGY RANGE
HADRON REACTIONS
INFORMATION
MATHEMATICAL SPACE
MESON REACTIONS
MEV RANGE
NUCLEAR REACTIONS
NUMERICAL DATA
PION REACTIONS
SPACE
TARGETS
651225* - Nuclear Properties & Reactions
A=1-5
Experimental- Nuclear Reactions & Scattering- (-1987)