Charmed hadron production in

D-meson production from recombination in hadronic collisions

“…The significance of this anti-correlation mainly establishes itself for leading D-mesons (cq) in forward production with meson beams [34], where the valence anti-quark provides a large part of the cc yield.…”

LEADING EFFECTS IN HADROPRODUCTIONS OF ΛcAND D FROM CONSTITUENT QUARK–DIQUARK CASCADE PICTURE

“…This is due to the fact that energetic Λ c andΛ c are produced in the d-quark-diquark and theū-antiquark-quark chains, respectively. The former chain is slightly shifted to the target fragmentation region as compared with the latter one due to the large momentum fraction of the diquark [30]. Therefore our model gives the negative asymmetry A π − A (Λ c ,Λ c ) at 0.…”

“…Here we choose very small intrinsic transverse momenta and use the value β in = 40 used in Ref. [31] in order to reproduce p 2 T dependences of D mesons. We take account of the annihilation of the valence antiquark from beam and valence quark from target in a slightly different way from the one pointed out in Refs.…”

“…The difference between the spectra of Ω andΩ in pp collision is described by the processes (13), (15) and (14) and the parameters are chosen as η [] = η {} = 0.25. [28,31] For the cascade process a → H(ab) + b in the beam (target) side, the distribution function of light-like fraction of b is assumed as…”

“…[28], we used cos 2 θ = 2 3 and P uū = 0.45, P dd = 0.45 and P ss = 0.10. To reproduce the data on π − p → D ± X cross section, we choose cos 2 θ = 1 2 , P cc = 0.0003, P uū = 0.435, P dd = 0.435 and P ss = 0.1297 [31]. The dynamical parameters γ [ ] and γ {} as well as the mixing angle of symmetric and anti-symmetric diquarks in octet baryon is related to the π ± spectra in proton fragmentation region and are chosen as γ [ ] = 1.5 and γ {} = 2.0 [30,31].…”