Singlet structure function g_1 at small x and small Q^2

Details Singlet structure function g_1 at small x and small Q^2 Singlet structure function g_1 at small x and small Q^2

2006-05-11

arxiv.org/abs/hep-ph/0605133v3

Eur.Phys.J.C50:823-828,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Section 2 is totally changed, one more ref added

Scientific paper

10.1140/epjc/s10052-007-0251-5

Explicit expressions for the singlet g_1 at small x and small Q^2 are obtained with the total resummation of the leading logarithmic contributions. It is shown that g_1 practically does not depend on Q^2 in this kinematic region. In contrast, it would be interesting to investigate its dependence on the invariant energy 2pq because, being g_1 positive at small 2pq, it can turn negative at greater values of this variable. The position of the turning point is sensitive to the ratio between the initial quark and gluon densities, so its experimental detection would enable to estimate this ratio

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