Production of exclusive dijets in diffractive deep inelastic scattering at HERA

Production of exclusive dijets in diffractive deep inelastic $$e^\pm p$$e±p scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 372 pb$$^{-1}$$-1. The measurement was performed for $$\gamma ^{*}$$γ∗–p centre-of-mass energies in the range $$90< W < {250}\,{\mathrm{GeV}}$$90 {25}\,{\mathrm{GeV}^{2}}$$Q2>25GeV2. Energy flows around the jet axis are presented. The cross section is presented as a function of $$\beta $$β and $$\phi $$ϕ, where $$\beta =x/x_\mathrm{I\!P}$$β=x/xIP, x is the Bjorken variable and $$x_\mathrm{I\!P}$$xIP is the proton fractional longitudinal momentum loss. The angle $$\phi $$ϕ is defined by the $$\gamma ^{*}$$γ∗–dijet plane and the $$\gamma ^{*}$$γ∗–$$e^\pm $$e± plane in the rest frame of the diffractive final state. The $$\phi $$ϕ cross section is measured in bins of $$\beta $$β. The results are compared to predictions from models based on different assumptions about the nature of the diffractive exchange.