Spin structure function g 1 (x, Q) and the DHGHY integral I(Q) at low Q: predictions from the GVMD model
نویسندگان
چکیده
منابع مشابه
Spin dependent structure function g 1 ( x , Q 2 ) at low x and low Q 2 Barbara Bade
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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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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The resummation of O(α l+1 s ln 2l x) terms in the evolution equation of the singlet part of g 1 (x, Q 2) is carried out. The corresponding singlet evolution kernels are calculated explicitely. The leading small-x contribution to the three-loop splitting function matrix is determined in the MS scheme. Relations are derived for the case of N = 1 supersymmetric Yang–Mills field theory. Numerical ...
متن کاملQCD predictions for spin dependent photonic structure function g γ 1 ( x , Q 2 ) in the low x region of future linear colliders
QCD predictions for spin dependent photonic structure function g γ 1 (x, Q 2) in the low x region of future linear colliders Abstract Spin dependent structure function g γ 1 (x, Q 2) of the polarised photon is analysed within the formalism based upon the unintegrated spin dependent par-ton distributions incorporating the LO Altarelli-Parisi evolution and the double ln 2 (1/x) resummation at low...
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We present estimates of possible data on spin-dependent asymmetries in inclusive scattering of high energy polarized electrons by high energy polarized protons at HERA, including statistical errors, and discuss systematic uncertainties. We show that these data would shed light on the small x behaviour of the polarized structure function g 1 , and would reduce substantially the uncertainty on th...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2002
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s2002-01041-2