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Author : Peter Neil Harriman
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (855 download)
Download or read book The Parton Momentum Distributions of the Nucleon and #LAMBDA#0!0!0!. written by Peter Neil Harriman and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter Neil Harriman
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
Download or read book The parton momentum distributions of the nucleon and Λ_QCD written by Peter Neil Harriman and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Generalized Transverse Momentum Dependent Parton Distributions of the Nucleon written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present first results from our analysis of the most general quark-quark correlator of the nucleon, which can be parameterized in terms of so-called generalized transverse momentum dependent parton distributions. These results include the first complete parameterization of the nucleon GPDs and TMDs to all twists as well as new results on possible nontrivial relations between them.
Author : Hikmat Bahadur BC
Publisher :
ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.:/5 (669 download)
Download or read book Generalized Parton Distributions and Angular Momentum Decomposition of the Nucleon written by Hikmat Bahadur BC and published by . This book was released on 2010 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (953 download)
Download or read book Structure and Spin of the Nucleon written by and published by . This book was released on 2014 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parton distribution functions, describing longitudinal momentum, helicity and transversity distributions of quarks and gluons, have been recently generalized to account also for transverse degrees of freedom. Two new sets of more general distributions, Transverse Momentum Distributions and Generalized Parton Distributions, were introduced to describe transverse momentum and space distributions of partons. Great progress has been made since then in measurements of different Single Spin Asymmetries (SSAs) in semi-inclusive and hard exclusive processes providing access to TMDs and GPDs, respectively. Facilities world-wide involved in studies of the 3D structure of nucleon include HERMES, COMPASS, BELLE, BaBar, Halls A, B, and C at JLab, and PHENIX and STAR at RHIC (BNL). TMD studies in the Drell-Yan process are also becoming an important part of the program of hadron scattering experiments. Studies of TMDs are also among the main driving forces of the JLab 12-GeV upgrade project, several of the forward upgrade proposals of STAR and PHENIX at RHIC, and future facilities, such as the Electron Ion Collider (EIC), FAIR in Germany, and NICA in Russia. In this contribution we present an overview of the latest developments in studies of parton distributions and discuss newly released results, ongoing activities, as well as some future measurements.
Download or read book Nucleon Transverse Momentum-dependent Parton Distributions from Domain Wall Fermion Calculations at 297 MeV Pion Mass written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Lattice QCD calculations of transverse momentum-dependent parton distributions (TMDs) in a nucleon are performed based on a definition of TMDs via hadronic matrix elements of quark bilocal operators containing staple-shaped gauge connections. A parametrization of the matrix elements in terms of invariant amplitudes serves to cast them in the Lorentz frame preferred for the lattice calculation. Using a RBC/UKQCD domain wall fermion ensemble corresponding to a pion mass of 297MeV, on a lattice with spacing 0.084fm, selected TMD observables are accessed and compared to previous explorations at heavier pion masses on coarser lattices.
Author : A. N. Antonov
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (838 download)
Download or read book Nucleon Momentum and Density Distributions in Nuclei written by A. N. Antonov and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. N. Antonov
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (246 download)
Download or read book The Nucleon Momentum Distributions of 39K, 40Ca and 48Ca written by A. N. Antonov and published by . This book was released on 1983 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (925 download)
Download or read book Nucleon and Nucleon-pair Momentum Distributions in Ad"2 Nuclei written by and published by . This book was released on 2014 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report variational Monte Carlo calculations of single-nucleon momentum distributions for Ad"2 nuclei and nucleon-pair and nucleon-cluster momentum distributions for Ad". The wave functions have been generated for a Hamiltonian containing the Argonne [nu]18 two-nucleon and Urbana X three-nucleon potentials. The single-nucleon and nucleon-pair momentum distributions exhibit universal features attributable to the one-pion-exchange tensor interaction The single-nucleon distributions are broken down into proton and neutron components and spin-up and spin-down components where appropriate. The nucleon-pair momentum distributions are given separately for pp and pn pairs. The nucleon-cluster momentum distributions include dp in 3He, tp and dd in S4He, [alpha]d in 6Li, [alpha]t in 7Li, and [alpha][alpha] in 8Be. Detailed tables are provided on-line for download.
Download or read book Transverse Momentum Distributions Inside the Nucleon from Lattice QCD. written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We study transverse momentum dependent parton distribution functions (TMDs) with non-local operators in lattice QCD, using MILC/LHPC lattices. Results obtained with a simplified operator geometry show visible dipole deformations of spin-dependent quark momentum densities. We discuss the basic concepts of the method, including renormalization of the gauge link, and an extension to a more elaborate operator geometry that would allow us to analyze process-dependent TMDs such as the Sivers-function.
Author : Markus Diehl
Publisher :
ISBN 13 :
Total Pages : 58 pages
Book Rating : 4.:/5 (851 download)
Download or read book Nucleon Form Factors, Generalized Parton Distributions and Quark Angular Momentum written by Markus Diehl and published by . This book was released on 2013 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nucleon Form Factors from Generalized Parton Distributions written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss the links between Generalized Parton Distributions (GPDs) and elastic nucleon form factors. These links, in the form of sum rules, represent powerful constraints on parameterizations of GPDs. A Regge parameterization for GPDs at small momentum transfer, is extended to the large momentum transfer region and it is found to describe the basic features of proton and neutron electromagnetic form factor data. This parameterization is used to estimate the quark contribution to the nucleon spin.
Download or read book Semi-Inclusive DIS and Transverse Momentum Dependent Distribution Studies at CLAS. written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Transverse Momentum Dependent parton distribution functions were introduced to describe both longitudinal and transverse momentum distributions of partons inside a nucleon. Great progress has been made in recent years in understanding these distributions measuring different spin asymmetries in semi-inclusive processes. Here we present an overview of the ongoing studies at CLAS and programs planned for the 6 and 12 GeV activity.
Author :
Publisher :
ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.:/5 (925 download)
Download or read book Comment on 'New Limits on Intrinsic Charm in the Nucleon from Global Analysis of Parton Distributions' written by and published by . This book was released on 2015 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intrinsic heavy quarks in hadrons emerge from the non-perturbative structure of a hadron bound state and are a rigorous prediction of QCD. Lattice QCD calculations indicate significant intrinsic charm and strangeness probabilities. Since the light-front momentum distribution of the Fock states is maximal at equal rapidity, intrinsic heavy quarks carry significant fractions of the hadron momentum. The presence of Fock states with intrinsic strange, charm, or bottom quarks in hadrons lead to an array of novel physics phenomena. Accurate determinations of the heavy-quark distributions in the proton are needed to interpret Tevatron and LHC measurements as probed of physics beyond the Standard Model.
Download or read book First Moments of Nucleon Generalized Parton Distributions written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We extrapolate the first moments of the generalized parton distributions using heavy baryon chiral perturbation theory. The calculation is based on the one loop level with the finite range regularization. The description of the lattice data is satisfactory, and the extrapolated moments at physical pion mass are consistent with the results obtained with dimensional regularization, although the extrapolation in the momentum transfer to t=0 does show sensitivity to form factor effects, which lie outside the realm of chiral perturbation theory. We discuss the significance of the results in the light of modern experiments as well as QCD inspired models.
Author : Mahmud Hassan
Publisher :
ISBN 13 :
Total Pages : 89 pages
Book Rating : 4.:/5 (643 download)
Download or read book The Study of Parton Distributions of the Nucleon in the MIT Bag Model written by Mahmud Hassan and published by . This book was released on 2004 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dru Bryant Renner
Publisher :
ISBN 13 :
Total Pages : 444 pages
Book Rating : 4.:/5 (562 download)
Download or read book Exploring Proton Structure Using Lattice QCD written by Dru Bryant Renner and published by . This book was released on 2004 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: We calculate moments of the generalized parton distributions of the nucleon using lattice QCD. The generalized parton distributions determine the angular momentum decomposition of the nucleon and the transverse distributions of partons within the nucleon. Additionally, the generalized parton distributions reduce to the elastic form factors and ordinary parton distributions in particular kinematic limits. Thus by calculating moments of the generalized parton distributions in lattice QCD we can explore many facets of the structure of the nucleon. In this effort, we have developed the building block method to determine all the lattice correlation functions which con- tribute to the off forward matrix elements of the twist two operators. These matrix elements determine the generalized form factors of the nucleon which in turn give the moments of the generalized parton distributions. Thus we use our building block method to calculate all the matrix elements of the lowest twist two operators. Fur- thermore, we use our method to construct an overdetermined set of matrix elements allowing a more accurate calculation of the generalized form factors.
