ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We present a measurement of the photon structure functionF 2 γ in the reactionee→eeX forQ 2 in the range 0.2〈Q 2〈7 GeV2, using 9,200 multihadron events obtained with the TPC/Two-Gamma detector at PEP. The data have been corrected for detector effects using a regularized unfolding procedure and are presented as a function ofx andQ 2. The structure function shows scaling in the region 0.3〈Q 2〈1.6 GeV2,x〈0.3 and rises for higherQ 2. AtQ 2=5.1 GeV2 the results are compared with QCD and, within the scheme of Antoniadis and Grunberg, rather conservative bounds for the QCD scale parameter of 133±50〈 $$\Lambda _{\overline {{\rm M}S} } $$ 〈268±98 MeV are obtained. A study of the final state structure shows that the rise ofF 2 γ is consistent with being entirely due to the pointlike component of the photon.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01561108
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