TY - JOUR
T1 - Direct photons in e+e- annihilation
AU - Laermann, E.
AU - Walsh, T. F.
AU - Schmitt, I.
AU - Zerwas, P. M.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1982/11/8
Y1 - 1982/11/8
N2 - We study the production of direct photons in e+e- annihilation e+e- → γ + hadrons, where the high-energy photon is emitted at a large angle to a hadron jet or is a fragment of the jet itself. We give the angle and energy dependence of the cross section for photons radiated from the final-state quarks, the initial-state leptons, and also the interference term. Large angle radiation by the quarks is only mildly affected by QCD corrections to the parton model. For photons radiated within or near a jet axis, however, the gluon radiative corrections can be large. We study the phenomenological implications of these corrections at present and future energies. Direct photon production affords a unique view into the short- and long-distance processes of jet formation. It can help clarify the space-time transition between perturbative and non-perturbative processes in jet development.
AB - We study the production of direct photons in e+e- annihilation e+e- → γ + hadrons, where the high-energy photon is emitted at a large angle to a hadron jet or is a fragment of the jet itself. We give the angle and energy dependence of the cross section for photons radiated from the final-state quarks, the initial-state leptons, and also the interference term. Large angle radiation by the quarks is only mildly affected by QCD corrections to the parton model. For photons radiated within or near a jet axis, however, the gluon radiative corrections can be large. We study the phenomenological implications of these corrections at present and future energies. Direct photon production affords a unique view into the short- and long-distance processes of jet formation. It can help clarify the space-time transition between perturbative and non-perturbative processes in jet development.
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U2 - 10.1016/0550-3213(82)90162-6
DO - 10.1016/0550-3213(82)90162-6
M3 - Article
AN - SCOPUS:0010182768
SN - 0550-3213
VL - 207
SP - 205
EP - 232
JO - Nuclear Physics, Section B
JF - Nuclear Physics, Section B
IS - 2
ER -