Determination of the Photoproduction Phase of $ρ^{0}$ Mesons

Publisher Website

9 November 1970

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

Vol. 25 (19) , 1377-1380
https://doi.org/10.1103/physrevlett.25.1377

Abstract

We have measured large-angle electron-positron pairs from the reaction

γ + Be \to Be + e^{+} + e^{-}

in the

e^{+} e^{-}

invariant-mass region

610 < m < 850 \frac{MeV}{c^{2}}

. The phase of the photoproduction amplitude of the

ρ

meson at 4.1-6.1 GeV was found to deviate from pure imaginary by 11.8°±4.4° which corresponds to a ratio of the real to imaginary

ρ

-nucleon amplitude of

β = 0.2 \pm 0.1

.

Keywords

This publication has 10 references indexed in Scilit:

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