Spin dependent structure function g 1 ( x , Q 2 ) at low x and low Q 2 Barbara Bade
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Spin dependent structure function g 1 (x, Q 2) at low x and low Q 2 Barbara Bade lek Abstract: This is a review of experimental and phenomenological investigations of the nucleon spin dependent structure function g 1 at low values of x and Q 2 .
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ar X iv : h ep - p h / 99 07 56 9 v 1 3 0 Ju l 1 99 9 Spin dependent structure function g 1 at low x and low Q 2
Spin dependent structure function g 1 at low x and low Q 2 B. Bade lek a,b Abstract Theoretical description of the spin dependent structure function g 1 (x, Q 2) in the region of low values of x and Q 2 is presented. It contains the Vector Meson Dominance contribution and the QCD improved parton model suitably extended to the low Q 2 domain. Theoretical predictions are compared with the recent ...
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Theoretical description of the spin dependent structure function g1(x,Q) in the region of low values of x and Q2 is presented. It contains the Vector Meson Dominance contribution and the QCD improved parton model suitably extended to the low Q2 domain. Theoretical predictions are compared with the recent experimental data in the low x, low Q2 region.
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Theoretical expectations concerning small x behaviour of the spin dependent structure function g 1 are summarised. This includes discussion of the Regge pole model predictions and of the double ln 2 (1/x) effects implied by perturbative QCD. The quantitative implementation of the latter is described within the unified scheme incorporating both Altarelli-Parisi evolution and the double ln 2 (1/x...
متن کاملUNIFIED DESCRIPTION OF THE NON − SINGLET SPIN DEPENDENT STRUCTURE FUNCTION g 1 INCORPORATING ALTARELLI - PARISI EVOLUTION AND THE DOUBLE LOGARITHMIC ln 2 ( 1 / x ) EFFECTS AT LOW x
A unified equation for the non-singlet spin dependent structure function gns 1 (x,Q 2) = g 1(x,Q 2) − gn 1 (x,Q2) which incorporates the complete leading order Altarelli-Parisi evolution at finite x and double logarithmic ln2(1/x) effects at x → 0 is formulated. This equation is solved assuming simple phenomenological parametrisation of the non-perturbative part of the structure function. Reaso...
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تاریخ انتشار 2003