Nonradiative Absorption of Positive Pions by Deuterons at 118 Mev

Cohn, C.E.

doi:10.1103/physrev.105.1582

Cited by 28 publications

(7 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1-3 The nonradiative absorption process was the first to be individually measured, 4 because of its significance in determining the spin of the pion. More recently attempts have been made to measure the cross sections for individual processes in counter experiments at 119 Mev, 5,6 94 and 76 Mev, 7 and 45 Mev. 8 The most complete work has been done at 85 Mev, 9 where cross sections for each…”

Section: Discussionmentioning

confidence: 99%

“…1 and 2, we show the momentum spectra for the reaction 7r~+^-->7r~+7r" f +w at incident pion energies 7V=0.93 and 1.37 Bev. 4,5 In these figures, the w + and iT mesons have been lumped together, so that the corresponding prediction of the isobar model is da/dp ir =J Ttl +J T (9) The dot-dashed curves in Figs. 1 and 2 show the separate momentum spectra J T> i and J Tt 2.…”

Section: Energy Spectra Of Pions and Nucleonsmentioning

confidence: 99%

“…The double peak is especially pronounced at 1.37 Bev, and has been observed for the reaction w~+p->7r~+7r + +^ at this energy. 5 Moreover, a double maximum was found by Walker and Crussard 10 at 1.5 Bev for the momentum distributions of the pions both from ir~-p and ir~-n interactions. The predicted momentum spectra of the recoil nucleons are in reasonable agreement with the data at 0.93 and 1.37 Bev.…”

mentioning

confidence: 94%

“…2 ment with the experimental data at these energies. 4,5 This method of comparison is independent of the ratio of the r=i and 7 , = f inelastic cross sections, and also the relative phase between the matrix elements, upon which the separate spectra of the 7r + and -K~ mesons would depend.…”

Section: Introductionmentioning

confidence: 99%

“…The solid curve was obtained from the isobar model. The dashed curve gives the result of the Fermi statistical theory.represents the weighted average of / over all mass values w/, whereas the integral in the denominator serves merely to normalize the correlation function dn/d cosdirir-In addition to the measurements of Walker et al4 at 0.93 Bev and of Eisberg et al5 at 1.37 Bev, Walker and Crussard 10 have made a study of 7r~-nucleon collisions in emulsion at 1.5 Bev. Although no detailed calculations were carried out for 2V =1.5 Bev, we note that the results of Walker and Crussard 10 seem to bear out qualitatively the predictions of the isobar model in several respects.…”

mentioning

confidence: 97%

See 4 more Smart Citations

Pion Production in Pion-Nucleon Collisions

Sternheimer

Lindenbaum

1958

Phys. Rev.

View full text Add to dashboard Cite

The single production of pions occurring in pion-nucleon collisions at incident pion energies below ^1.5 Bev has been considered in terms of the inelastic excitation of the nucleon to the isobaric state with isotopic spin and angular momentum == §, previously identified with the resonant state in the low-energy pion-nucleon scattering. An associated separate recoil pion accompanies the isobar, and conserves energy and momentum. The isobar subsequently decays into a nucleon and a pion. Expressions have been obtained for the branching ratios between the different reactions, Tf~-\-p -> 7r _ +7r + -j-w, and 7r~-f-7r°+^, and for the separate energy spectra of the 7r + , TT°, and ir~ mesons. The momentum distributions of the pions and recoil nucleons have been calculated at incident pion energies of 0.93 Bev and 1.37 Bev, and are generally in reasonable agreement with the experimental data available at these energies.

show abstract