We present measurements from events with two isolated prompt photons in ppBAR collisions at square-root s=1.8 TeV. The differential cross section, measured as a function of transverse momentum (P(T)) of each photon, is about 3 times what next-to-leading-order QCD calculations predict. The cross section for photons with P(T) 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 P(T). The magnitude of the vector sum of the transverse momenta of both photons, K(T)=P(T1) + P(T2), has a mean value of [K(T)]=5.1 +/- 1.1 GeV.

F., A., M., A., D., A., C., A., G., A., M., A., et al. (1993). Measurement of the Cross-section For Production of 2 Isolated Prompt Photons In P(p)over-bar Collisions At Root-s=1.8 Tev. PHYSICAL REVIEW LETTERS, 70(15), 2232-2236 [10.1103/PhysRevLett.70.2232].

Measurement of the Cross-section For Production of 2 Isolated Prompt Photons In P(p)over-bar Collisions At Root-s=1.8 Tev

PAOLETTI, RICCARDO;TURINI, NICOLA;
1993

Abstract

We present measurements from events with two isolated prompt photons in ppBAR collisions at square-root s=1.8 TeV. The differential cross section, measured as a function of transverse momentum (P(T)) of each photon, is about 3 times what next-to-leading-order QCD calculations predict. The cross section for photons with P(T) 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 P(T). The magnitude of the vector sum of the transverse momenta of both photons, K(T)=P(T1) + P(T2), has a mean value of [K(T)]=5.1 +/- 1.1 GeV.
F., A., M., A., D., A., C., A., G., A., M., A., et al. (1993). Measurement of the Cross-section For Production of 2 Isolated Prompt Photons In P(p)over-bar Collisions At Root-s=1.8 Tev. PHYSICAL REVIEW LETTERS, 70(15), 2232-2236 [10.1103/PhysRevLett.70.2232].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11365/41001
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