High-mass dijet cross sections in photoproduction at HERA

Abstract Dijet differential cross sections for the reaction e + p→e + + jet + jet + X in the photoproduction regime have been measured with the ZEUS detector at HERA using an integrated luminosity of 42.7 pb −1 . The cross sections are given for photon–proton centre-of-mass energies in the range 134 W M jj , and of the dijet angular variables have been measured for 47 M jj M jj Z 0 photoproduction of σ e + p → e + Z 0 X