Hadronic structure of the photon at LEP
نویسنده
چکیده
Recent improvements in the analysis techniques and Monte Carlo models used in the measurement of the hadronic structure function of the photon have lead to much improved experimental results. Its low x behaviour was studied in various Q regions using LEP1 and LEP2 data, while its x dependence and Q evolution up to very high virtualities, as well as its charm component were studied using the high energy and luminosity data of LEP2. These recent results will be presented.
منابع مشابه
Qcd Measurements in Photon-photon Collisions at Lep *
An overview of the latest results of the LEP collaborations on QCD measurements in photon-photon collisions is presented, including measurements of the total hadronic cross-section, the production of heavy quarks and dijets and the structure functions of real and virtual photons.
متن کاملar X iv : h ep - e x / 04 06 05 8 v 1 2 2 Ju n 20 04 QCD Studies at LEP
Studies of hadronic final states of e + e − annihilations at LEP are reviewed. The topics included cover hadronic event shapes, measurements of αs, determinations of QCD colour factors and tests of the non-Abelian gauge structure of QCD, differences between quark and gluon jets, QCD with heavy quarks and selected results of two-photon scattering processes.
متن کاملar X iv : h ep - e x / 99 09 02 3 v 1 1 4 Se p 19 99 Experimental Results on Two - Photon Physics from LEP
This review covers selected results from the LEP experiments on the structure of quasi-real and virtual photons. The topics discussed are the total hadronic cross-section for photon-photon scattering, hadron production, jet cross-sections, heavy quark production for photon-photon scattering, photon structure functions, and crosssections for the exchange of two virtual photons.
متن کاملStructure of photon and the muon puzzle . ∗
In this talk I first briefly explain the puzzle presented by the high muon content observed in air-showers which point to the ultra high-energy γ sources like the HER-X-1. Since it had been suggested that a possible explanation of the puzzle might come from the effects of the hadronic structure of the photon, I briefly explain the concept of photon structure function and comment on the uncertai...
متن کاملJET PHYSICS AT LEP AND WORLD SUMMARY OF αs a
Recent results on jet physics and tests of QCD from hadronic final states in e + e − annihilation at PETRA and at LEP are reviewed, with special emphasis on hadronic event shapes, charged particle production rates, properties of quark and gluon jets and determinations of αs. The data in the entire energy range from PETRA to LEP-2 are in broad agreement with the QCD predictions. The world summar...
متن کامل