Impact parameter dependence of parton densities at low x
نویسندگان
چکیده
منابع مشابه
Unintegrated parton densities at small x
We present recent results on transverse momentum dependent parton densities in the limit of small Bjorken x. A definition of an unintegrated seaquark density is proposed which can be used within the CCFM Monte-Carlo event generator CASCADE. We further discuss aspects of the determination of a NLO BFKL unintegrated gluon density. c Copyright owned by the author(s) under the terms of the Creative...
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The connection between parton distributions as a function of the impact parameter and off-forward parton distributions is discussed in the limit of vanishing skewedness parameter ζ, i.e. when the off-forwardness is purely transverse. For the 2nd moment it is also illustrated how to relate ζ 6= 0 data to ζ = 0 data, which is important for experimental measurements of these observables.
متن کاملOff-forward Parton Distributions and Impact Parameter Dependent Parton Structure
where x = x±x and p = p+p refer to the usual light-cone components, p̄ = 1 2 (p+ p), ∆ = p− p, and t ≡ ∆. The “off-forwardness” (or skewedness) in Eqs. (1,2) is defined as ξ ≡ ∆ + p+ . From the point of view of parton physics in the infinite momentum frame, these OFPDs have the physical meaning of the amplitude for the process that a quark is taken out of the nucleon with longitudinal momentum f...
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Parton distributions in impact parameter space, which are obtained by Fourier transforming GPDs, exhibit a significant deviation from axial symmetry when the target and/or quark is transversely polarized. In combination with the final state interactions, this transverse deformation provides a natural mechanism for naive-T odd transverse single-spin asymmetries in semi-inclusive DIS. The deforma...
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We study generalized parton distributions in the impact parameter representation, including the case of nonzero skewness ξ. Using Lorentz invariance, and expressing parton distributions in terms of impact parameter dependent wave functions, we investigate in which way they simultaneously describe longitudinal and transverse structure of a fast moving hadron. We compare this information with the...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2001
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(01)01307-x