Study of vector meson fragmentation using a broken SU(3) model

Abstract

Inclusive hadro production in e^+ e^- annihilation processes is examined to study the fragmentation process. A broken SU(3) model is used to determine the quark and gluon fragmentation functions of octet vector mesons, ρand K^*, in a simple way with an SU(3) breaking parameter λ. These are expressed in terms of just two light quark fragmentation functions, V(x, Q2) and γ(x, Q2) and the gluon fragmentation function Dg(x, Q2). These functions are parameterized at the low input scale of Q0^2 = 1.5 GeV2, evolved through LO DGLAP evolution including charm and bottom flavour at appropriate thresholds, and fitted by comparison with data at the Z-pole. The model is extended with the introduction of a few additional parameters to include a study of singlet--octet mixing and hence ωand ϕfragmentation. The model gives good fits to the available data for x >~ 0.01, where x is the scaled energy of the hadron. The model is then applied successfully to ω, ϕproduction in pp collisions at the Relativistic Heavy Ion Collider, RHIC; these data form an important base-line for the study of Quark Gluon Plasma in heavy nucleus collisions at RHIC, and also in future at the LHC.

27 pages PRD-latex with 10 eps figure files; modified to include an analysis of RHIC pp data

References in corpus (6)

• Measurement of neutral mesons in p+p collisions at sqrt(s) = 200 GeV and scaling properties of hadron production
• Determination of fragmentation functions and their uncertainties
• Global Analysis of Fragmentation Functions for Eta Mesons
• Cross section and double helicity asymmetry for eta mesons and their comparison to neutral pion production in p+p collisions at sqrt(s)=200 GeV
• Determination of fragmentation functions and their application to exotic-hadron search
• Prospects for $\varphi$ meson production in pp collisions at the ALICE experiment

Cited by in corpus (8)

• NLO Productions of $\omega$ and $K_{\mathrm{S}}^0$ with a Global Extraction of the Jet Transport Parameter in Heavy Ion collisions
• Nuclear suppression of $\varphi$ meson yields with large $p_T$ at the RHIC and the LHC
• Vector meson fragmentation using a model with broken SU(3) at the Next-to-Leading Order
• Production of ${\rho }^0$ meson with large $p_T$ at NLO in heavy-ion collisions
• Fragmentation of $\omega$ and $\varphi$ Mesons in $e^{+}{e}^{-}$ and $pp$ Collisions at NLO
• Jet tomography in high-energy nuclear collisions
• Particle production at large $p_T$ in Xe+Xe collisions with jet quenching using the higher twist approach
• Direct ${\rho }_L$ meson production in proton-proton and proton-antiproton collisions