/ 94 06 38 5 v 3 5 A ug 1 99 4 CERN - TH . 7331 / 94 A DIRECT TEST OF PERTURBATIVE QCD AT SMALL x
نویسنده
چکیده
We show that recent data from HERA on the proton structure function F2 at small x and large Q 2 provide a direct confirmation of the double asymptotic scaling prediction of perturbative QCD. A linear rise of lnF2 with the scaling variable σ is observed throughout the kinematic region probed at HERA, and the measured slope is in excellent agreement with the QCD prediction. This provides a direct determination of the leading coefficient of the beta function. At large values of the scaling variable ρ the data display a small but statistically significant scaling violation. Submitted to: Physics Letters B CERN-TH.7331/94 June 1994 * On leave from a Royal Society University Research Fellowship. † On leave from INFN, Sezione di Torino, Italy. Perturbative QCD predicts that at sufficiently large t ≡ lnQ/Λ and small x the nucleon structure function F2 should exhibit double scaling in the two variables
منابع مشابه
0 v 3 2 0 Ju l 1 99 4 CERN - TH . 7265 / 94 DOUBLE ASYMPTOTIC SCALING AT HERA
Perturbative QCD predicts that at sufficiently large Q and small x nucleon structure functions should exhibit scaling in the two variables √ ln 1 x ln lnQ2 and √
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