Proton electromagnetic form factors in the timelike region from 8.9 to 13.0 ${GeV}^{2}$

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1 March 1993

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

Vol. 70 (9) , 1212-1215
https://doi.org/10.1103/physrevlett.70.1212

Abstract

Cross sections for the reaction pp¯→

e^{+}

e^{-}

have been measured at s=8.9,12.4, and 13.0

{GeV}^{2}

. The cross sections have been analyzed to obtain the proton electromagnetic form factors in the timelike region. We find that

G_{M}

(

q^{2}

)∝

q^{- 4}

α_{s}^{2}

(

q^{2}

) for

q^{2}

≥5 (GeV/c

)^{2}

.

Keywords

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