Models for photon-photon total cross-sections
نویسندگان
چکیده
منابع مشابه
Models for Photon-photon Total Cross-Sections
We present here a brief overview of recent models describing the photon-photon cross-section into hadrons. We shall show in detail results from the eikonal minijet model, with and without soft gluon summation.
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We discuss present predictions for the total γγ and γp cross-sections, highlighting why predictions differ. We present results from the Eikonal Minijet Model and improved predictions based on soft gluon resummation.
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In ee and in hadron-hadron reactions at collider energies, prompt photons are observed and their cross sections are measured only if the photons are relatively isolated in phase space. Isolation is required to reduce various hadronic backgrounds including those from the electromagnetic decay of mesons, e.g., π → 2γ. The essence of isolation is that a cone of half-angle δ is drawn about the dire...
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We discuss predictions for the total inelastic γγ cross-section and their model dependence on the input parameters. We compare results from a simple extension of the Regge Pomeron exchange model as well as predictions from the eikonalized mini-jet model with recent LEP data. It is by now established that all total cross-sections, including photopro-duction, rise as the c.m. energy of the collid...
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In the interaction of a high energy particle with a proton or nucleus, 9 the recoil spectrum of the target at very low momentum transfer is related simply. to the total cross section of the incident particle with the photon. Estimates of the size of the effect plus recent developments in low recoil techniques suggest that measurement of the photon-photon, as well as the 71 and K-photon cross se...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2000
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(00)00160-2