Total Cross Section for Charge Exchange Scattering ofπ−Mesons by Hydrogen at 42, 30, and 20 Mev

1954 ◽  
Vol 95 (5) ◽  
pp. 1295-1300 ◽  
Author(s):  
W. J. Spry
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Charge Exchange ◽  
Exchange Scattering

Pion-proton charge-exchange scattering near 2.0 GeV/ c

1966 ◽  
Vol 289 (1419) ◽  
pp. 513-520 ◽  
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Charge Exchange ◽  
Cross Sections ◽  
Thick Plate ◽  
Charge Exchange Reaction ◽  
Total Cross Sections ◽  
Proton Charge ◽  
Exchange Scattering ◽  
Polynomial Expansions

Results based on an analysis of 25% of the pictures obtained from a measurement of the charge-exchange reaction π - p → n 0 n with thick-plate spark chambers are given. Differential and total cross sections for charge-exchange scattering were obtained at five momenta centred about the T = 1/2 resonance found at 2.07 GeV/ c in the π - p total cross section. In the vicinity of the resonance the total cross section is falling smoothly, and the higher coefficients of Legendre polynomial expansions show no significant variation with momentum. From this it is concluded that there is either a complicated interference of several states at the resonance or that the resonance is in a relatively high partial wave and is mainly inelastic.

Positronium-beam production and positronium scattering from molecular hydrogen

1996 ◽  
Vol 74 (7-8) ◽  
pp. 518-520 ◽  
Author(s):  
A. J. Garner ◽  
G. Laricchia
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Charge Exchange ◽  
Conversion Efficiency ◽  
Molecular Hydrogen ◽  
Positron Beam ◽  
Gas Pressure ◽  
Beam Production ◽  
Positronium Beam ◽  
Incident Positron

The efficiency with which a positron beam is converted into an positronium beam, via charge exchange in molecular hydrogen and argon gases was investigated. At certain incident positron energies, molecular hydrogen was found to be over three times as efficient as argon for this purpose. The beam conversion efficiency was investigated with respect to both gas pressure and energy. Preliminary measurements for the total cross section of Ps scattering from molecular hydrogen are also presented.

Differential cross-section measurements in π−p charge exchange scattering from 620 to 2730 MeV/c

1976 ◽  
Vol 117 (1) ◽  
pp. 12-49 ◽  
Author(s):  
R.M. Brown ◽  
A.G. Clark ◽  
P.J. Duke ◽  
W.M. Evans ◽  
R.J. Gray ◽  
...  
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Charge Exchange ◽  
Differential Cross ◽  
Exchange Scattering

Regge Pole Plus Background Model of Backward πp Scattering

1974 ◽  
Vol 52 (13) ◽  
pp. 1155-1159
Author(s):  
S. Kogitz ◽  
R. K. Logan
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Charge Exchange ◽  
Differential Cross ◽  
Regge Pole ◽  
Background Model ◽  
Cross Section Data ◽  
Section Data ◽  
The Cross ◽  
Exchange Scattering

We present a model of backward π+p, π−p, and π−p charge exchange scattering consistent with our earlier approach to forward π−p charge exchange and backward π+p. We consider two body differential cross section data which exhibits a dip–bump structure as well as nonzero polarization. This is explained in terms of a dominant Regge pole vanishing at the dip accompanied by a background. The background is primarily responsible for the large u behavior of the cross section which includes the rise after the dip. It is assumed that the presence of nonzero polarization dictates this behavior. We isolate the I = 3/2 amplitude in π−p backwards and determine the I = 1/2 amplitude from π+p backwards. A prediction for π−p → nπ0 follows.

Charge-exchange and total cross section in π−p interactions at high energies

1963 ◽  
Vol 4 (3) ◽  
pp. 164-166 ◽  
Author(s):  
G. Bellini ◽  
E. Fiorini ◽  
A. Orkin-Lecourtois
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Charge Exchange ◽  
High Energies

Spin effects in pion charge-exchange scattering on nuclei

1969 ◽  
Vol 47 (2) ◽  
pp. 236-238
Author(s):  
Lowell Charlton ◽  
J. M. Eisenberg
Keyword(s):  
Correlation Function ◽  
Differential Cross Section ◽  
Cross Section ◽  
Charge Exchange ◽  
Differential Cross ◽  
Sum Rule ◽  
Spin Effects ◽  
Exchange Scattering

The differential cross section for pion charge-exchange scattering from 12C is calculated using sum-rule techniques in order to investigate possible spin-dependent effects in proton–neutron correlations. The resulting cross section proves to be quite insensitive to such effects under the usual assumptions concerning the correlation function.

Measurement of the Total Cross Section for Symmetric Charge Exchange in Helium from 400-2000 eV

1969 ◽  
Vol 177 (1) ◽  
pp. 71-76 ◽  
Author(s):  
Stephen W. Nagy ◽  
William J. Savola ◽  
Edward Pollack
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Charge Exchange
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