Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
Looking at the Gluon Momentum of the Nucleon with Dymanical Twisted Mass Fermions
Author: Looking at the Gluon Momentum of the Nucleon with Dynamical Twisted Mass Fermions
Author: Looking at the Gluon Momentum of the Nucleon with Dynamical Twisted Mass Fermions
Author: Nucleon Form Factors with N_1tnF
Author: Dynamical Twisted Mass Fermions with Light Quarks
Author: Nucleon and Pion Gluon Parton Distribution Function from Lattice QCD Calculation
Author: Zhouyou FanPublisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 0
Book Description
Parton distribution functions (PDFs) are important to characterize the structure of the hadrons such as protons and neutrons. The contribution to the structure from quarks has been studied in detail during the past few decades. The structure in the gluon sector is also important but less studied. For high-energy hadrons, the gluon contribution dominates at small x, where x is the momentum fraction carried by a quark or gluon. At large x, the uncertainty of the gluon PDF is large, especially compared to that of the quark PDFs at large x. Gluon PDFs for nucleons and pions are mostly extracted from global analysis of experimental data using perturbation theory as a guide. Theoretically, lattice QCD provides an independent non-perturbative theoretical approach to calculate the gluon PDFs. We present the exploratory study of nucleon gluon PDFs from lattice QCD using the quasi-PDF approach. Using valence overlap fermions on the 2 + 1-flavor domain-wall fermion gauge ensemble, the quasi-PDF matrix elements we obtain agree with the Fourier transform of the global-fit PDF within statistical uncertainty. We further study the x-dependent nucleon and pion gluon distributions via the pseudo-PDF approach on lattice ensembles with 2 + 1 + 1 flavors of highly improved staggered quarks (HISQ) generated by the MILC Collaboration. Using clover fermions for the valence action, and adding momentum smearing, PDFs are found for pion boost momenta up to 2.56 9́8 GeV. Several lattice sizes and spacings (a 9́8 0.9, 0.12 and 0.15 9́8 fm) were evaluated, resulting in three pion masses, MÏ0 9́8 220, 310 and 690 9́8 MeV/c2.
The Gluon Momentum Fraction of the Nucleon from Lattice QCD
Author: Constantia AlexandrouParticle Physics Reference Library
Author: Herwig SchopperPublisher: Springer Nature
ISBN: 3030382079
Category : Heavy ions
Languages : en
Pages : 632
Book Description
This first open access volume of the handbook series contains articles on the standard model of particle physics, both from the theoretical and experimental perspective. It also covers related topics, such as heavy-ion physics, neutrino physics and searches for new physics beyond the standard model. A joint CERN-Springer initiative, the "Particle Physics Reference Library" provides revised and updated contributions based on previously published material in the well-known Landolt-Boernstein series on particle physics, accelerators and detectors (volumes 21A, B1,B2,C), which took stock of the field approximately one decade ago. Central to this new initiative is publication under full open access
Physics Briefs
Author: Basics of Perturbative QCD
Author: Yuri DokshitzerPublisher: Atlantica Séguier Frontières
ISBN: 9782863321010
Category : Perturbation (Quantum dynamics).
Languages : en
Pages : 286
Book Description