A Measurement of the Virtual Photon Structure Function

Technical Report · Tue Jan 06 04:00:00 EST 2004

DOI:https://doi.org/10.2172/826667· OSTI ID:826667

Belcinski, R ^[1]

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1. SLAC

The structure function of a virtual photon, representing the physics of the hard scattering of an electron off a massive photon target resulting in a hadronic final state, has been measured in the kinematic range 1.5 {le} Q{sup 2} {le} 5.5 GeV{sup 2}, 0.1 {le} P{sup 2} {le} 1.5 GeV{sup 2} and 2 {le} W {le} 20 GeV. The measurement was done using the TPC/Two-Gamma detector facility and employs a heretofore unique method to determine the W of the final state by using information from both the visible mass of the final state as well as the mass reconstructed from the two lepton tags. The results are compared to a variety of models, and are found to be consistent with an incoherent sum of the QPM and VDM models.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 826667
• Report Number(s): SLAC-R-693
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRONS
LEPTONS
PHOTONS
PHYSICS
SCATTERING
STRUCTURE FUNCTIONS
TARGETS