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Measurement of the cross-section for production of two isolated prompt photons in $\bar{p}p$ collisions at $\sqrt{s} = 1.8$ TeV

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DOI: 10.1103/PhysRevLett.70.2232
OAI: oai:inspirehep.net:343802
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INSPIRE-HEP
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Abstract

We present measurements from events with two isolated prompt photons in p¯p collisions at √s =1.8 TeV. The differential cross section, measured as a function of transverse momentum (PT) of each photon, is about 3 times what next-to-leading-order QCD calculations predict. The cross section for photons with PT in the range 10–19 GeV is 86±27(stat)−23+32(syst) pb. We also study the correlation between the two photons in both azimuthal angle and PT. The magnitude of the vector sum of the transverse momenta of both photons, KT=‖PT1+PT2‖, has a mean value of 〈KT〉=5.1±1.1 GeV.

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