Inclusive hadron productions inpAcollisions

Inclusive Lepton-hadron Experiments

Spin Polarization of Hyperons in the Hadron-hadron Inclusive Collisions

The high energy hadron-hadron collisions produce various hyperons, in which large spin polarizations perpendicular to a production plane are observed at high Feynman-x (xF ) and low transverse momentum pT . For these collisions, we have proposed a global model on the basis of quark rearrangements concept. In order to produce a final state hyperon at high xF , we consider possible rearrangement ...

Inclusive S-wave charmonium productions in B decays.

The inclusive S−wave charmonium production rates in B decays are considered using the Bodwin-Braaten-Lepage (BBL) approach, including the relativistic corrections and the color-octet mechanism suggested as a possible solution to the ψ ′ puzzle at the Tevatron. We first consider relativistic and radiative corrections to J/ψ → ee and J/ψ → Light Hadrons (LH), in order to determine two nonperturba...

Spin dependent structure functions with leading-hadron productions

Parton distribution functions in the nucleons have been obtained primarily through lepton-induced deep-inelastic scattering (DIS) experiments. One of the most important unresolved issues in our current knowledge of parton distributions is the role of gluons for describing the nucleon spin. While gluon polarization, ∆G(x), could in principle be deduced from the Q-evolution of the polarized struc...

Qualitative Aspects of Polarization Distributions In Excited Heavy Hadron Productions

Within the context of flux tube models, heavy quark fragmentation takes place through the breaking of flux tubes with the production of a (di)quarkanti(di)quark pair. It is found that the (di)quark produced are more likely to be found in an Lz = 0 state. This naturally leads to an supression of the polarization distribution parameters w3/2 and w̃1 for (D1,D ∗ 2) and (Λc1,Λ ∗ c1) production respe...