A high-Q2 measurement of the photon structure function F2

High-energy photoproduction

“…Most of the available photon parton distributions have been parametrized from those data. Later results have come from the TOPAZ [18] and AMY [19] experiments at TRISTAN and from the OPAL [20,21] and DELPHI [22] experiments at LEP. They are shown in Fig.…”

“…The values of b have been obtained from a fit of the differential cross section of the form dσ d|t| = A · e −b|t| in the given t range. [18,19] and LEP [20,22] compared to the LO fits to all previous data of LAC [27] and GRV [31]. Compilation from [179].…”

Optical spectroscopy of trapped neutral atoms

“…Adding to this the expected much larger statistics, there is a bright future for photoproduction physics at HERA. Figure 3: Recent data on F 2 (x; Q 2 ) from TRISTAN [18,19] and LEP [20,22] compared to the LO ts to all previous data of LAC [27] and GRV [31]. Compilation from [179].…”

“…Most of the available photon parton distributions have been parametrized from those data. Later results have come from the TOPAZ [18] and AMY [19] experiments at TRISTAN and from the OPAL [20,21] and DELPHI [22] experiments at LEP. They are shown in Fig.…”

DiffractiveJ/ψproduction through the color-octet mechanism in resolved photon processes at DESY HERA

“…This dual nature of the photon have been studied in γP and γγ, γ * γ scattering processes [8]. There are two basic types of inclusive processes where the partonic structure of the photon is investigated: one is the deep inelastiv scattering e + γ → e + X processes ( DIS γ ), where the structure function of the photon F γ 2 (x, Q 2 ) is measured [8,9]. the other is th large P T jet and charged particle production in γP and γγ collisions, where individual parton densities in the photon are probed [8,[10][11][12].…”