Details

Autor(en) / Beteiligte

• Boroun, G. R.

Titel

Physical limits in the color-dipole model bounds

Ist Teil von

• The European physical journal. A, Hadrons and nuclei, 2021-07, Vol.57 (7), Article 219

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The ratio of the cross-sections for the transverse and longitudinal virtual photon polarizations, σ L / T γ ∗ p , at high photon–hadron energy scattering is studied. The relationship between the gluon distributions obtained using the color-dipole model and standard gluons obtained from the Dokshitzer–Gribov–Lipatov–Altarelli-Parisi (DGLAP) evolution and the Altarelli–Martinelli equations is investigated. It is shown that the color-dipole bounds are dependent on the gluon distribution behavior. This behavior is considered by expansion and Laplace-transform methods. Numerical calculations at leading order (LO) and next-to-leading order (NLO) approximations and a comparison with the color-dipole model (CDM) bounds indicate the range of validity of this method at small dipole sizes, r ∼ 1 / Q ≪ 1 / Q s .