Conventional versus optimization procedures and the gluon distribution
Teoretičeskaâ i matematičeskaâ fizika, Tome 87 (1991) no. 1, pp. 62-75
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Recent data on large-$p_T$ $\overline{p}p\to\gamma X$ and $pp\to\gamma X$ at $\overline{p}p$ collider, ISR and fixed target energies are analyzed using complete next-to-leading
$(O(\alpha_s^2))$ corrections. We employ physical scales $\mu=M=p_T$ and use
three parton distribution sets differing essentially in the softness of the gluon. With $\mu=M=p_T$ we find that, on the whole, the data favor a distribution of intermediate softness, in contrast to optimization procedures which lead to a very soft gluon distribution.
We discuss theoretical uncertainties related with the photon bremsstrahlung contribution and with the variation of the scales ($p_T/2\leqslant\mu=M\leqslant 2p_T$). We conclude that inherent ambiguities in the theory lead to significant uncertainty in the gluon distribution.
@article{TMF_1991_87_1_a6,
author = {D. Atvud and A. P. Kontoguris and S. Papadopulos},
title = {Conventional versus optimization procedures and the gluon distribution},
journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
pages = {62--75},
publisher = {mathdoc},
volume = {87},
number = {1},
year = {1991},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/TMF_1991_87_1_a6/}
}
TY - JOUR AU - D. Atvud AU - A. P. Kontoguris AU - S. Papadopulos TI - Conventional versus optimization procedures and the gluon distribution JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1991 SP - 62 EP - 75 VL - 87 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1991_87_1_a6/ LA - ru ID - TMF_1991_87_1_a6 ER -
%0 Journal Article %A D. Atvud %A A. P. Kontoguris %A S. Papadopulos %T Conventional versus optimization procedures and the gluon distribution %J Teoretičeskaâ i matematičeskaâ fizika %D 1991 %P 62-75 %V 87 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1991_87_1_a6/ %G ru %F TMF_1991_87_1_a6
D. Atvud; A. P. Kontoguris; S. Papadopulos. Conventional versus optimization procedures and the gluon distribution. Teoretičeskaâ i matematičeskaâ fizika, Tome 87 (1991) no. 1, pp. 62-75. http://geodesic.mathdoc.fr/item/TMF_1991_87_1_a6/