Charm and bottom quark production in photon-nucleon and photon-photon collisions
نویسنده
چکیده
I discuss mechanisms of heavy quark production in (real) photon-nucleon and (real) photon (real) photon collisions. In particular, I focuse on application of the Saturation Model. In addition to the main dipole-nucleon or dipole-dipole contribution included in recent analyses, I propose how to calculate within the same formalism the hadronic single-resolved contribution to heavy quark production. At high photon-photon energies this yields a sizeable correction of about 30-40 % for inclusive charm production and 15-20 % for bottom production.
منابع مشابه
Remarks on heavy-quark production in photon-nucleon and photon-photon collisions
I discuss mechanisms of heavy quark production in (real) photon-nucleon and (real) photon (real) photon collisions. In particular, I focuse on application of the Saturation Model. In addition to the main dipole-nucleon or dipole-dipole contribution included in recent analyses, I propose how to calculate within the same formalism the hadronic single-resolved contribution to heavy quark productio...
متن کاملHeavy quark production in photon-nucleon and photon-photon collisions
We discuss several mechanisms of heavy quark production in (real) photon-nucleon and (real) photon (real) photon collisions. In particular we focuse on application of the Saturation Model. We discuss how to generalize the formula from virtual photon proton scattering and analyze threshold effects. We discuss a possibility to measure the cross section for γγ → 2c2c̄. In addition to the main dipol...
متن کاملCharm and bottom production in two-photon collisions with OPAL
A preliminary update of the previous OPAL measurement of the inclusive production of D mesons in anti-tagged photon-photon collisions is presented together with the first preliminary OPAL measurement of bottom production in photon-photon collisions.
متن کاملAnalytic calculation of prompt photon plus associated heavy flavor at next-to-leading order in QCD.
Contributions through second order, O(as ), in perturbative quantum chromodynamics are calculated analytically for inclusive associated production of a prompt photon and a charm quark at large values of transverse momentum in high energy hadron-hadron collisions. Seven partonic subprocesses contribute at order as 2 . We find important corrections to the lowest order, O(as), subprocess cg→gc . W...
متن کاملUnintegrated gluon in the photon and heavy quark production
The unintegrated gluon density in the photon is determined, using the Kimber-MartinRyskin prescription . In addition, a model of the unintegrated gluon is proposed, based on the saturation model extended to the large-x region. These gluon densities are applied to obtain cross sections for charm and bottom production in γp and γγ collisions using the kt factorization approach. We investigate bot...
متن کامل