We present cross sections for the reactions $p\overline{p}\to H\gamma$ and $p\overrightarrow{p}H\gamma$ arising from the subprocess $q\overline{q}\to H\gamma .$ The calculation includes the complete one-loop contribution from all light quarks as well as the tree contributions from the light quarks and $c$ and $b$ quarks. These are the main sources of Higgs-photon associated production at hadron colliders. At Fermilab Tevatron energies, the cross section is typically between 0.1 fb and 1.0 fb for $80\mathrm{GeV}<~m_H<~160\mathrm{GeV},$ while at CERN LHC energies it exceeds about 2.0 fb over the same range of $m_H.$ While substantial, these cross sections are not large enough to produce a signal which is discernable above the backgrounds from $q\overline{q}\to b\overline{b}\gamma$ and $g\overrightarrow{g}b\overline{b}\gamma .$

• Received 10 June 1997

DOI:https://doi.org/10.1103/PhysRevD.58.057301