Measurements of Elastic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ρ</mml:mi></mml:math>- and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ϕ</mml:mi></mml:math>-Meson Photoproduction Cross Sections on Protons from 30 to 180 GeV

Abstract

The elastic photoproduction cross sections for $\ensuremath{\rho}$ and $\ensuremath{\phi}$ mesons from protons have been measured from 30 to 180 GeV. The energy dependences agree well with predictions made by using vector-meson dominance and an additive quark model. The $\ensuremath{\rho}$ cross section is approximately constant with energy while the $\ensuremath{\phi}$ cross section rises from 0.5 to 0.7 \ensuremath{\mu}b with increasing energy.