منابع مشابه
Hadronic photon-photon scattering at LEP
Hadronic interactions of two quasi-real photons have been studied extensively both during the LEP1 and the LEP2 data taking periods. The higher energies available at LEP2 in particular opened regions of phase space where hadronic processes can be predicted reliably by perturbative QCD calculations, usually available to next-to-leading order in the strong coupling constant for the process concer...
متن کاملTotal Hadronic Cross-Section of Photon-Photon Interactions at LEP
The total hadronic cross-section σγγ(W ) for the interaction of real photons, γγ → hadrons, is measured for γγ centre-of-mass energies 10 ≤ W ≤ 110 GeV. The cross-section is extracted from a measurement of the process ee → eeγγ → ee + hadrons, using a luminosity function for the photon flux together with form factors for extrapolating to real photons (Q = 0 GeV). The data were taken with the OP...
متن کاملHadronic structure of the photon at LEP
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 hig...
متن کاملMeasurements of Hadronic Structure Functions of the Photon at Lep
The photon is unique in that it can act both as a fundamental particle the gauge boson of QED or as an extended object with structure. The structure function of the photon differs from that of the proton because the photon has a point-like coupling to quark charges which is calculable in perturbative QCD as well as a non-perturbative hadron-like part. The classic way to investigate the structur...
متن کاملHadronic Structure Functions of the Photon Measured at Lep
the photon structure function F γ 2 is obtained. Here Q 2 is the absolute value of the four momentum squared of the virtual photon, γ; x and y are the usual dimensionless variables of deep inelastic scattering and α is the fine structure constant. In the region of small y studied (y ≪ 1) the contribution of the term proportional to the longitudinal structure function F γ L is small and it is us...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2008
ISSN: 1742-6596
DOI: 10.1088/1742-6596/110/2/022056