Description of the spin structure function g₁ at arbitrary x and arbitrary Q²
Ermolaev, B. I. · Greco, M. · Troyan, S. I.
الأصل · EN
The explicit expressions describing the structure function g₁ at arbitrary x and Q² are obtained. In the first place, they combine the well-known DGLAP expressions for g₁ with the total resummation of leading logarithms of x, which makes possible to cover the kinematic region of arbitrary x and large Q². In order to cover the small-Q² region the shift Q² -> Q² + mu² in the large-Q² expressions for g₁ is suggested and values of mu are estimated. The expressions obtained do not require singular factors x⁻ᵃ in the fits for initial parton densities.
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