Study of the Reactionπ++p→Σ++K+near Threshold

Publisher Website

15 July 1962

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 127 (2) , 607-613
https://doi.org/10.1103/physrev.127.607

Abstract

The reaction

π^{+} + p \to Σ^{+} + K^{+}

has been studied in the momentum range 1037 through 1065 MeV/c with specific regard to the determination of

s

- and

p

-wave amplitudes. If we represent these amplitudes near threshold by

S_{\frac{1}{2}} = a_{0} k^{\frac{1}{2}}

,

P_{\frac{1}{2}} + 2 P_{\frac{3}{2}} = b_{0} k^{\frac{3}{2}} e^{i χ_{b}}

, and

P_{\frac{3}{2}} - P_{\frac{1}{2}} = c_{0} k^{\frac{3}{2}} e^{i χ_{c}}

, the following results have been obtained from an analysis based on 274 events:

{a_{0}}^{2} = (3.31 \pm 0.87) \times 10^{- 5}

mb/sr-MeV/c,

\frac{b_{0}}{a_{0}} = 0.0075 \pm 0.0026

,

\frac{c_{0}}{a_{0}} = - 0.0062 \pm 0.0023

,

χ_{b} = 52.1 \pm 8.0

deg,

χ_{c} = 80.8 \pm 27.2

deg. An alternative set of solutions exists for

χ_{b} = - 52.1

deg and

χ_{c} = 99.2

deg.

Keywords

This publication has 18 references indexed in Scilit:

Etude à 1.15 GeV/c de la création associée π+ + p → Σ+ + K+
Il Nuovo Cimento (1869-1876), 1961
Production of Hyperons in Hydrogen by Positive Pions
Reviews of Modern Physics, 1961
The Cusp in Lambda-KProduction at Sigma-KThreshold
Reviews of Modern Physics, 1961
Pion-Pion Interaction in Pion Production by $π^{+} - p$ Collisions
Physical Review Letters, 1961
π+−pInteractions ProducingΣ+−K+in a Propane Bubble Chamber
Physical Review B, 1960
Production ofΣ+Hyperons by 990-Mev Positive Pions in Liquid Hydrogen
Physical Review B, 1959
Bubble chamber study of unstable particle production in π−-p collisions at 910, 960, 1200 and 1300 MeV
Il Nuovo Cimento (1869-1876), 1958
Collisions of le1 Bev Particles (Excluding Electrons and Photons) with Nuclei
Annual Review of Nuclear Science, 1957
Charge Independence and Hyperon Production
Physical Review B, 1957
On the Penetrating Component of Cosmic Radiation
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1938