Results 31 to 40 of about 1,855 (178)

Exclusive double quarkonium production and generalized TMDs of gluons

open access: yesPhysics Letters B, 2022
Being the “mother distributions” of all types of two-parton correlation functions, generalized transverse momentum dependent parton distributions (GTMDs) have attracted a lot of attention over the last years.
Shohini Bhattacharya   +4 more
doaj   +1 more source

Large-x parton distributions [PDF]

open access: yesPhysics Letters B, 2000
Reliable knowledge of parton distributions at large x is crucial for many searches for new physics signals in the next generation of collider experiments. Although these are generally well determined in the small and medium x range, it has been shown that their uncertainty grows rapidly for x > 0.1.
Kuhlmann, S.   +7 more
openaire   +3 more sources

Pionic parton distributions revisited [PDF]

open access: yesThe European Physical Journal C, 1999
Using constituent quark model constraints we calculate the gluon and sea-quark content of pions solely in terms of their valence density (fixed by N Drell-Yan data) and the known sea and gluon distributions of the nucleon, using the most recent updated valence-like input parton densities of the nucleon. The resulting small-x dynamical QCD predictions
Gluck, M., Reya, E., Schienbein, I.
openaire   +3 more sources

Nuclear parton distribution functions [PDF]

open access: yesNuclear Physics B - Proceedings Supplements, 2009
We study nuclear effects of charged current deep inelastic neutrino-iron scattering in the framework of a chi^2 analysis of parton distribution functions (PDFs). We extract a set of iron PDFs which are used to compute x_Bj-dependent and Q^2-dependent nuclear correction factors for iron structure functions which are required in global analyses of free ...
Schienbein, I.   +5 more
openaire   +4 more sources

Unintegrated generalized parton distributions [PDF]

open access: yesPhysical Review D, 2001
9 pages including 2 ...
Martin, A. D., Ryskin, M. G.
openaire   +2 more sources

Wigner Functions and Quark Orbital Angular Momentum

open access: yesEPJ Web of Conferences, 2015
Wigner distributions contain combined position and momentum space information of the quark distributions and are related to both generalized parton distributions (GPDs) and transverse momentum dependent parton distributions (TMDs).
Mukherjee Asmita   +2 more
doaj   +1 more source

Are Parton distributions positive? [PDF]

open access: yesNuclear Physics B - Proceedings Supplements, 1999
We show that the naive positivity conditions on polarized parton distributions which follow from their probabilistic interpretation in the naive parton model are reproduced in perturbative QCD at the leading log level if the quark and gluon distribution are defined in terms of physical processes. We show how these conditions are modified at the next-to-
Forte, Stefano   +2 more
openaire   +2 more sources

Parton Distributions [PDF]

open access: yesAIP Conference Proceedings, 2005
13 pages, 9 figures. Plenary talk presented at the XIII International Workshop on Deep Inelastic Scattering (DIS 2005), Madison WI USA, April 27--May 1 ...
openaire   +2 more sources

Measurement of double-parton scattering in inclusive production of four jets with low transverse momentum in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV

open access: yesJournal of High Energy Physics, 2022
A measurement of inclusive four-jet production in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. The transverse momenta of jets within |η| < 4.7 are required to exceed 35, 30, 25, and 20 GeV for the first-, second-, third ...
The CMS collaboration   +2347 more
doaj   +1 more source

Tuning the Circularly Polarized Reflection from Cholesteric Hydroxypropyl Cellulose Using Molecular Photoswitches

open access: yesAngewandte Chemie, Volume 138, Issue 1, 2 January 2026.
Molecular photoswitches dispersed in a cholesteric hydroxypropyl cellulose mesophase enable reversible, light‐driven tuning of structural color and polarization. Enantiomer‐specific effects and light‐responsive patterning highlight the potential of dynamic, cellulose‐based photonic materials.
Fathy Hassan   +8 more
wiley   +2 more sources

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