Properties of photon plus two-jet events in $\bar{p}p$ collisions at $\sqrt{s} = 1.8$ TeV - INSPIRE

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Properties of photon plus two-jet events in $\bar{p}p$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

Apr, 1997

43 pages

Published in:

Phys.Rev.D 57 (1998) 67-77

DOI:

10.1103/PhysRevD.57.67

Report number:

FERMILAB-PUB-97-106-E

Experiments:

FNAL-E-0741

View in:

reference search28 citations

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Abstract: (APS)

We present the first general measurements (invariant-mass, transverse-energy, and angular distributions) of the process, p¯p→γ+2 jets+X, using data collected by the CDF at Fermilab. We compare the data with predictions from a tree-level QCD calculation and the PYTHIA shower Monte Carlo program. Our data sample is particularly sensitive to contributions from initial- and final-state radiation of photons and jets. Using the PYTHIA Monte Carlo program, we contrast the kinematical distributions for direct photon production with those for initial- and final-state photon radiation (bremsstrahlung). Based on the angular distributions, we find that our data favor a mixture of bremsstrahlung and direct photon production, as predicted, over either process alone.

13.85.Hd
13.85.Qk
anti-p p: colliding beams
anti-p p: inclusive reaction
jet: pair production
photon: associated production
photon: direct production
quantum chromodynamics: perturbation theory
photon: bremsstrahlung
mass spectrum: (2jet photon)

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