Observation of scaling of the photon structure function F2γ at low Q2
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ID: 267172
1987
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Abstract
The structure function ${F}_{2}^{\ensuremath{\gamma}}$ for a quasireal photon has been measured in the reaction ee\ensuremath{\rightarrow}eeX for ${Q}^{2}$ in the range 0.2${Q}^{2}$7 ${\mathrm{GeV}}^{2}$, by use of 9200 multihadron events obtained with the TPC/Two-Gamma detector at the SLAC storage ring PEP. The data have been corrected for detector effects by a regularized unfolding procedure and are presented as ${F}_{2}^{\ensuremath{\gamma}}$(x,${Q}^{2}$). The structure function shows scaling in the region 0.3${Q}^{2}$1.6 ${\mathrm{GeV}}^{2}$, x0.3, and rises for higher ${Q}^{2}$ and x0.1. Below ${Q}^{2}$=0.3 ${\mathrm{GeV}}^{2}$, scaling breaks down in accordance with the finite cross-section bound for real photons.
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1987physicalobservation
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| Journal | physical review letters |
| Year | 1987 |
| DOI |
doi:10.1103/PhysRevLett.58.97
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