The gluon momentum density xg(x, Q(2)) of the proton was extracted at Q(2) = 20 GeV2 for small values of x between 4 x 10(-4) and 10(-2) from the scaling violations of the proton structure function F-2 measured recently by ZEUS in deep inelastic neutral current ep scattering at HERA. The extraction was performed in two ways. Firstly, using a global NLO fit to the ZEUS data on F-2 at low x constrained by measurements from NMC at larger x; and secondly using published approximate methods for the solution of the GLAP QCD evolution equations. Consistent results are obtained. A substantial increase of the gluon density is found at small x in comparison with the NMC result obtained at larger values of x.

Extraction of the Gluon Density of the Proton At X

CIRIO, Roberto;COSTA, Marco;PERONI, Cristiana;SACCHI, Roberto;SOLANO, Ada Maria;
1995-01-01

Abstract

The gluon momentum density xg(x, Q(2)) of the proton was extracted at Q(2) = 20 GeV2 for small values of x between 4 x 10(-4) and 10(-2) from the scaling violations of the proton structure function F-2 measured recently by ZEUS in deep inelastic neutral current ep scattering at HERA. The extraction was performed in two ways. Firstly, using a global NLO fit to the ZEUS data on F-2 at low x constrained by measurements from NMC at larger x; and secondly using published approximate methods for the solution of the GLAP QCD evolution equations. Consistent results are obtained. A substantial increase of the gluon density is found at small x in comparison with the NMC result obtained at larger values of x.
1995
Inglese
Sì, ma tipo non specificato
345
576
588
12
http://dx.doi.org/10.1016/0370-2693(95)00021-C
ZEUS; INELASTIC MUON SCATTERING; DEUTERON STRUCTURE FUNCTIONS; NUCLEON STRUCTURE FUNCTIONS; HIGH STATISTICS MEASUREMENT; PARTON DISTRIBUTIONS; LEADING ORDER; HIGH Q2; PERTURBATION-THEORY; SCALING VIOLATIONS; PP COLLISIONS
262
416
M. DERRICK;D. KRAKAUER;S. MAGILL;B. MUSGRAVE;J. REPOND;J. SCHLERETH;R. STANEK;R. L. TALAGA;J. THRON;F. ARZARELLO;R. AYAD;G. BARI;M. BASIL...espandi
info:eu-repo/semantics/article
reserved
03-CONTRIBUTO IN RIVISTA::03A-Articolo su Rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/109191
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