Results 121 to 130 of about 246,289 (260)
On the description of exotic hadron states within QCD sum rules
EPJ Web of Conferences, 2017 Revisiting the QCD sum-rule description of exotic hadron states, we argue that, in order to arrive at trustable analyses of, for instance, strong decay widths of multiquarks, it is inevitable to adopt the QCD sum-rule approach beyond the leading ...
Lucha Wolfgang, Melikhov Dmitri
doaj +1 more source
On the non-perturbative realization of QCD gauge-invariance
, 2017 A few years ago the use of standard functional manipulations was demonstrated to imply an unexpected property satisfied by the fermionic Green's functions of QCD: effective locality.
Fried, Herbert M. +2 more
core +1 more source
q‐Deformed Glueball Spectrum in AdS/QCD Correspondence
Advances in High Energy Physics, Volume 2024, Issue 1, 2024.This work presents the application of the q‐algebra in the glueball spectrum. This algebra is implemented through Jackson’s derivatives in a Schrödinger‐like equation resulting from the gravity fluctuations around the braneworld scenario in five dimensions.
Fabiano F. Santos +2 more
wiley +1 more source
Physics Letters B, 2023 While perturbative QCD is sufficient for understanding the color, mass and energy dependences of parton energy loss and jet quenching at large transverse momentum in heavy-ion collisions, a simultaneous description of heavy flavor nuclear modification ...
Wen-Jing Xing +2 more
doaj
Heavy Quark Symmetry Violation in Semileptonic Decays of D Mesons
, 1992 The decays of $D$ mesons to $K l \nu$ and $K^* l \nu$ final states exhibit significant deviations from the predictions of heavy-quark symmetry, as one might expect since the strange quark's mass is of the same order as the QCD scale.
A. Ali +54 more
core +1 more source
Computation of Heavy Quarkonium Spectrum in Perturbative QCD [PDF]
arXiv, 2016 Non-relativistic bound state theories for QED and QCD have become fairly mature and amenable to a textbook-level understanding and computation. In this talk we give an introductory review of the following subjects related to the recent computation of the heavy quarkonium spectrum using perturbative QCD: (1) Technological developments in higher-order ...
arxiv
Controlling quark mass determinations non-perturbatively in three-flavour QCD
EPJ Web of Conferences, 2017 The determination of quark masses from lattice QCD simulations requires a non-perturbative renormalization procedure and subsequent scale evolution to high energies, where a conversion to the commonly used MS¯$\overline {{\rm{MS}}} $ scheme can be safely
Campos Isabel +5 more
doaj +1 more source
Classical effective theory for hot QCD [PDF]
arXiv, 1998 In high temperature QCD, the perturbation theory is plagued with infrared divergences which reflect long-range non-perturbative phenomena. I argue that it is possible to study such phenomena within a classical thermal field theory which can be put on a three-dimensional lattice. The classical theory is an effective theory for the soft, non-perturbative
arxiv
Probing the Perturbative NLO Parton Evolution in the Small-$x$ Region
, 2004 A dedicated test of the perturbative QCD NLO parton evolution in the very small-$x$ region is performed. We find a good agreement with recent precision HERA-data for $F_2^p(x,Q^2)$, as well as with the present determination of the curvature of $F_2^p ...
21 +8 more
core +3 more sources
The Curvature of F_2^p(x, Q^2) as a Probe of Perturbative QCD Evolutions in the small-x Region [PDF]
arXiv, 2007 Perturbative NLO and NNLO QCD evolutions of parton distributions are studied, in particular in the (very) small-x region, where they are in very good agreement with all recent precision measurements of F_2^p(x,Q^2). These predictions turn out to be also rather insensitive to the specific choice of the factorization scheme (MS or DIS).
arxiv