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Teoreticheskaya i Matematicheskaya Fizika, 1991, Volume 87, Number 1, Pages 62–75
(Mi tmf5470)
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This article is cited in 5 scientific papers (total in 5 papers)
Conventional versus optimization procedures and the gluon distribution
D. Atvud, A. P. Kontoguris, S. Papadopulos
Abstract:
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.
Received: 17.05.1990
Citation:
D. Atvud, A. P. Kontoguris, S. Papadopulos, “Conventional versus optimization procedures and the gluon distribution”, TMF, 87:1 (1991), 62–75; Theoret. and Math. Phys., 87:1 (1991), 374–385
Linking options:
https://www.mathnet.ru/eng/tmf5470 https://www.mathnet.ru/eng/tmf/v87/i1/p62
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