Testing the scale dependence of the scale factor σeff in double dijet production at the LHC

• Verfasst von: Domdey, Svend Oliver [VerfasserIn]
• Verfasst von: Pirner, Hans J. [VerfasserIn]
• Verfasst von: Wiedemann, Urs Achim [VerfasserIn]
• Titel: Testing the scale dependence of the scale factor σeff in double dijet production at the LHC
• Verf.angabe: Svend Domdey, Hans-Jürgen Pirner, Urs Achim Wiedemann
• Jahr: 2010
• Umfang: 10 S.
• Fussnoten: Im Titel ist "eff" bei "σeff" tiefgestellt ; Published online: 19 November 2009 ; Gesehen am 16.02.2023
• Titel Quelle: Enthalten in: The European physical journal / C
• Ort Quelle: Berlin : Springer, 1998
• Jahr Quelle: 2010
• Band/Heft Quelle: 65(2010), 1/2, Seite 153-162
• ISSN Quelle: 1434-6052
• DOI: doi:10.1140/epjc/s10052-009-1198-5
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Dijet Cross Section
• Sach-SW: High Energy Phys
• Sach-SW: Momentum Fraction
• Sach-SW: Parton Density
• Sach-SW: Transverse Momentum
• K10plus-PPN: 1836310277

Abstract

The scale factor σeff is the effective cross section used to characterize the measured rate of inclusive double dijet production in high-energy hadron collisions. It is sensitive to the two-parton distributions in the hadronic projectile. In principle, the scale factor depends on the center of mass energy and on the minimal transverse energy ET,min  of the jets contributing to the double dijet cross section. Here, we point out that proton-proton collisions at the LHC will provide for the first time experimental access to these scale dependences in a logarithmically wide, nominally perturbative kinematic range 10≲ET,min ≲100 GeV. This constrains the dependence of two-parton distribution functions on parton momentum fractions and parton localization in impact parameter space. Novel information is to be expected about the transverse growth of hadronic distribution functions in the range of semi-hard Bjorken x (0.001≲x≲0.1) and high resolution Q2. We discuss to what extent one can disentangle different pictures of the x-evolution of two-parton distributions in the transverse plane by measuring double-hard scattering events at the LHC.