2 00 4 Double parton correlations versus factorized distributions
نویسندگان
چکیده
Using the generalized Lipatov-Altarelli-Parisi-Dokshitzer equations for the two-parton distribution functions we show numerically that the dynamical correlations contribute to these functions quite a lot in comparison with the factorized components. At the scale of CDF hard process (∼ 5 GeV) this contribution to the double gluon-gluon distribution is nearly 10% and increases right up to 30% at the LHC scale (∼ 100 GeV) for the longitudinal momentum fractions x ≤ 0.1 accessible to these measurements. For the finite longitudinal momentum fractions x ∼ 0.2 ÷ 0.4 the correlations are large right up to 90% in accordance with the predicted QCD asymptotic behaviour.
منابع مشابه
Unintegrated double parton distributions
We present the construction of unintegrated double parton distribution functions which include dependence on transverse momenta of partons. We extend the formulation which was used to obtain the single unintegrated parton distributions from the standard, integrated parton distribution functions. Starting from the homogeneous part of the evolution equations for the integrated double parton distr...
متن کاملar X iv : h ep - p h / 06 11 25 6 v 1 2 0 N ov 2 00 6 Hadron Tomography Matthias
Generalized parton distributions describe the distribution of partons in the transverse plane. For transversely polarized quarks and/or nucleons, these impact parameter dependent parton distributions are not axially symmetric. These transverse distortions can be related to spin-orbit correlations as well as to (intuitively) to transverse single-spin asymmetries, allowing novel insights into qua...
متن کاملar X iv : h ep - p h / 00 06 19 3 v 1 1 6 Ju n 20 00 ERROR PROPAGATION IN QCD FITS
The parton momentum density distributions of the proton were obtained from a NLO QCD analysis of HERA and fixed target structure function data. The resulting parton distribution set includes the full information on errors and correlations.
متن کاملMultiple Parton Scattering in Nuclei: Twist-Four Nuclear Matrix Elements and Off-Forward Parton Distributions
Multiple parton scatterings inside a large nucleus generally involve highertwist nuclear parton matrix elements. The gluon bremsstrahlung induced by multiple scattering depends not only on direct parton matrix elements but also on momentum-crossed ones, due to the Landau-Pomeranchuk-Migdal interference effect. We show that both types of twist-four nuclear parton matrix elements can be factorize...
متن کاملar X iv : h ep - p h / 04 09 35 4 v 2 5 O ct 2 00 4 Hadron structure from γ ∗ p scattering : interpreting hadronic matrix elements
Abstract. Hadron structure from high-Q2 γ∗ p scattering processes is often expressed in terms of hadronic matrix elements of nonlocal operators. Properly defining and interpreting these quantities is very important in light of experiments aiming to extract transverse momentum dependent parton distributions or generalized parton distributions. The current status will be reviewed, including recen...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2004