Next-to-MLLA corrections to single inclusive kt-distributions and 2-particle correlations in a jet

Abstract

The hadronic kt-spectrum inside a high energy jet is determined including corrections of relative magnitude O{\sqrt{α_s}} with respect to the Modified Leading Logarithmic Approximation (MLLA), in the limiting spectrum approximation (assuming an infrared cut-off Q0 =Lambda_{QCD}) and beyond Q_0\neΛ_{QCD}. The results in the limiting spectrum approximation are found to be, after normalization, in impressive agreement with preliminary measurements by the CDF collaboration, unlike what occurs at MLLA, pointing out small overall non-perturbative contributions. Within the same framework, 2-particle correlations inside a jet are also predicted at NMLLA and compared to previous MLLA calculations.

35 pages and 39 figures. Comments, appendices, figures, references added. Version to appear in Phys. Rev. D

References in corpus (5)

• Two particle correlations inside one jet at "Modified Leading Logarithmic Approximation" of Quantum Chromodynamics; I: exact solution of the evolution equations at small x
• Hadronic single inclusive kt distributions inside one jet beyond MLLA
• Inclusive Hadronic Distributions Inside One Jet at High Energy Colliders at "Modified Leading Logarithmic Approximation" of Quantum Chromodynamics
• Single Inclusive Distribution and Two-Particle Correlations Inside One Jet at "Modified Leading Logarithmic Approximation" of Quantum Chromodynamics II : Steepest Descent Evaluation at Small X
• Jet calculus problems of the perturbative quantum chromodynamics

Cited by in corpus (13)

• Parton Fragmentation Functions
• Jet physics in heavy-ion collisions
• (medium-modified) Fragmentation Functions
• Parton fragmentation in the vacuum and in the medium
• Jet Evolution in the Quark-Gluon Plasma from RHIC to the LHC
• Particle Multiplicity in Jets and Sub-jets with Jet Axis from Color Current
• Medium-modified evolution of multiparticle production in jets in heavy-ion collisions
• Jet fragmentation transverse momentum distributions in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Three-particle correlations in QCD parton showers
• Determination of alpha_s at NLO*+NNLL from a global fit of the low-z parton-to-hadron fragmentation functions in e+e- and DIS collisions
• Small-x single-particle distributions in jets from the coherent branching formalism
• Inclusive hadronic distributions in jets and sub-jets with jet axis from color current
• Three-particle correlations in QCD jets and beyond