22,560 research outputs found
QCD Factorization for heavy quarkonium production at collider energies
In this talk, I briefly review several models of the heavy quarkonium
production at collider energies, and discuss the status of QCD factorization
for these production models.Comment: 7 pages, 12 figures, Talk presented at the Conference on Quark
Confinement and Hadron Spectrum VII, Ponta Delgada, Portugal, 2-7 September,
200
Collinear factorization for deep inelastic scattering structure functions at large Bjorken xB
We examine the uncertainty of perturbative QCD factorization for hadron
structure functions in deep inelastic scattering at a large value of the
Bjorken variable xB. We analyze the target mass correction to the structure
functions by using the collinear factorization approach in the momentum space.
We express the long distance physics of structure functions and the leading
target mass corrections in terms of parton distribution functions with the
standard operator definition. We compare our result with existing work on the
target mass correction. We also discuss the impact of a final-state jet
function on the extraction of parton distributions at large fractional momentum
x.Comment: 18 pages, 10 figures; discussion on baryon number conservation
clarifie
Heavy quarkonium production in hadronic collisions in TMD framework
Heavy quarkonium () production at low transverse momentum
() in high-energy hadronic collisions is revisited from the point of
view of transverse momentum dependent (TMD) framework. We perform resummation
of double logarithmic correction associated with initial-state soft gluon
shower for production by employing Collins-Soper-Sterman (CSS)
formalism. We show that the CSS formalism provides a nice description of
production data in p+ collisions at Tevatron and p+p
collisions at the LHC.Comment: 6 pages, 2 figures, proceedings of QCD Evolution 2017, 22-26 May
2017, Newport News, VA-US
Novel Phenomenology of Parton Distributions from the Drell-Yan Process
The Drell-Yan massive lepton-pair production in hadronic collisions provides
a unique tool complementary to the Deep-Inelastic Scattering for probing the
partonic substructures in hadrons. We review key concepts, approximations, and
progress for QCD factorization of the Drell-Yan process in terms of collinear
or transverse momentum dependent (TMD) parton distribution functions. We
present experimental results from recent fixed-target Drell-Yan as well as
and boson production at colliders, focussing on the topics of flavor
structure of the nucleon sea as well as the extraction of novel Sivers and
Boer-Mulders functions via single transverse spin asymmetries and azimuthal
lepton angular distribution of the Drell-Yan process. Prospects for future
Drell-Yan experiments are also presented.Comment: 50 pages and 23 figures, and references added and minor typos
correcte
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