Avakyan, R.O.
Structure Function
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Measurement and QCD Analysis of the Photon Structure Function F2 (x, Q**2)

The PLUTO collaboration Berger, Christoph ; Genzel, H. ; Lackas, W. ; et al.
Nucl.Phys.B 281 (1987) 365, 1987.
Inspire Record 230592 DOI 10.17182/hepdata.33588

We present a measurement of the hadronic structure function F 2 γ ( x , Q 2 ) of the photon in the Q 2 range from 10 to 100 GeV 2 . Data were taken with the PLUTO detector at the e + e - storage ring PETRA. This measurement and previous PLUTO measurements in the Q 2 range of 1.5 to 16 GeV 2 are compared with higher order QCD calculations. The structure function is consistent with the predicted log Q 2 behaviour when charm contributions are subtracted. The x dependence can be well described for 0.1 < x < 0.9 by the regularization scheme of Antoniadis and Grunberg. Within their scheme the data yield a value of Λ MS = 183 + 65/ −40( stat. ) + 46/ −36( sys. ) MeV for the QCD scale parameter.

5 data tables
Table 1

Data read from graph.

Table 2

Data read from graph.

Table 3

Data read from graph.

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MEASUREMENTS OF THE STRUCTURE FUNCTIONS F2 (x, Q**2) FROM neutrino p AND ANTI-NEUTRINO p INTERACTIONS

The WA21 collaboration Grassler, H. ; Lanske, D. ; Schulte, R. ; et al.
OXFORD NP-79/84, 1984.
Inspire Record 15788 DOI 10.17182/hepdata.1180

None

2 data tables
Table 1

NORMALISATION UNCERTAINTY IS 7 PCT.

Table 2

NORMALISATION UNCERTAINTY IS 7 PCT.


Measurement of the Photon Structure Function F2 (x, Q**2)

The PLUTO collaboration Berger, Christoph ; Deuter, A. ; Genzel, H. ; et al.
Phys.Lett.B 142 (1984) 111-118, 1984.
Inspire Record 201376 DOI 10.17182/hepdata.30545

None

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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First Measurement of the Photon Structure Function F2

The PLUTO collaboration Berger, Christoph ; Genzel, H. ; Grigull, R. ; et al.
Phys.Lett.B 107 (1981) 168-172, 1981.
Inspire Record 167681 DOI 10.17182/hepdata.31043

Using data taken at PETRA we present results on deep inelastic electron photon scattering at momentum transfers 1 < Q 2 < 15 GeV 2 . The results are expressed in terms of the photon structure function F 2 and are compared with QCD predictions and “hadronic” models of the photon. The pointlike component of the photon is found to be dominant.

2 data tables
Table 1

Data read from graph.. Data for W < 3.5 in Berger et al. 1981, PL 99B,287 (<a href=http://durpdg.dur.ac.uk/scripts/reacsearch.csh/TESTREAC/red+1164> RED = 1164 </a>).

Table 2

PHOTON STRUCTURE FUNCTION. NUMERICAL VALUES OF DATA ON FIGURE SUPPLIED BY W. WAGNER.


Determination of the Quark Density Ratio $d(x)/u(x)$ in the Proton

The Aachen-Bonn-CERN-Munich-Oxford collaboration Allen, P. ; Grassler, H. ; Lanske, D. ; et al.
Phys.Lett.B 103 (1981) 71-74, 1981.
Inspire Record 10562 DOI 10.17182/hepdata.31204

Data from an exposure of BEBC filled with hydrogen to a wideband neutrino beam are analysed to yield the structure function F v p 2 ( x ) for x > 0.2. Using our results in combination with data from electron-proton and muon-proton scattering, the quark density ratio d/u is determined as a function of x . The dominance u at large x is clearly seen. The results are compared with theoretical predictions.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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