Broken Quantum Chromodynamics and Photon-Photon Collisions
نویسندگان
چکیده
منابع مشابه
Tests of Perturbative Quantum Chromodynamics in Photon - Photon Collisions
The production of hadrons in the collision of two photons via the process1 e+e-f e+e-X (see Fig. 1) can provide an ideal laboratory for testing many of the features of the photon's hadronic interactions, especially its short distance aspects. We will review here that part of two-photon physics which is particularly relevant to tests of perturbative QCD. (Invited talk presented at the 1979 Inter...
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QCD predictions for 77 annihilation into single mesons, meson pairs, and baryon pairs are reviewed. Two-photon exclusive processes provide the most sensitive and practical measure of the distribution amplitudes, and thus a critical confrontation between QCD and experiment. Both the angular distribution and virtual photon mass dependence of these amplitudes are sensitive to the shapes of the r$(...
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Leading order perturbative QCD predictions are given for the twophoton processes yy + ~71, 6, and pp at large momentum transfer. As we have shown in a series of recent papers,l the predictions of perturbative quantum chromodynamics can be extended to the whole domain of large momentum transfer exclusive processes. The results lead to a comprehensive new range of rigorous predictions of QCD whic...
متن کاملPhoton-photon Collisions*
Studies of photon-photon collisions are reviewed with particular emphasis on new results reported to this conference. These include results on light meson spectroscopy and deep inelastic ey scattering. Considerable work has now been accumulated on resonance production by yy collisions. Preliminary high statistics studies of the photon structure function F$(x,Q2) are given and comments are made ...
متن کاملPhoton - Photon Collisions
At this meeting a huge array of new and high quality experimental results for exclusive and inclusive twophoton channels has been reported, both at high and low transverse momentum and at high and low virtual photon mass.2) In many theoretical areas the precision of QCD predictions has now been sharp ened, allowing quantitative meaSures of the running coupling constant, a8(Q2), determinations o...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1982
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.68.1802