Fragmentation of ω and ϕ mesons in e+e- and pp collisions at NLO

A combined analysis of both e+e- (LEP, SLD) and pp (RHIC-PHENIX and LHC-ALICE) hadroproduction processes are done for the first time for the vector meson nonet at the next-to-leading order (NLO) using a model with broken SU(3) symmetry. The transverse momentum (pT) and rapidity (y) dependence of the differential cross-section for ω and ϕ mesons of the pp data are also discussed. The input universal quark (valence and singlet) fragmentation functions at a starting scale of Q02 = 1.5GeV2, after evolution, have values that are consistent with the earlier analysis for e+e- at NLO. However, the universal gluon fragmentation function is now well determined from this study with significantly smaller error bars, as the pp hadroproduction cross-section is particularly sensitive to the gluon fragmentation since it occurs at the same order as the quark fragmentation, in contrast to the e+e- hadroproduction process. Additional parameters involved in describing the strangeness and sea suppression and octet-singlet mixing are found to be close to the earlier analysis; in addition, a new relation between the gluon and sea suppression in K∗ and ϕ hadroproduction has been observed.