ORCID Profile
0000-0001-7391-8830
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Publisher: Elsevier BV
Date: 04-2000
Publisher: American Physical Society (APS)
Date: 08-10-2001
Publisher: Elsevier BV
Date: 12-2005
Publisher: Elsevier BV
Date: 04-1970
Publisher: Springer Science and Business Media LLC
Date: 2007
Publisher: Elsevier BV
Date: 11-2006
Publisher: Elsevier BV
Date: 2001
Publisher: World Scientific Pub Co Pte Lt
Date: 30-01-2007
DOI: 10.1142/S0217751X07035616
Abstract: We study pseudoscalar and scalar mesons using a practical and symmetry preserving truncation of QCD's Dyson-Schwinger equations. We investigate and compare properties of ground and radially excited meson states. In addition to exact results for radial meson excitations we also present results for meson masses and decay constants from the chiral limit up to the charm-quark mass, e.g., the mass of the χ c0 (2P) meson.
Publisher: World Scientific Pub Co Pte Lt
Date: 10-04-2005
DOI: 10.1142/S0217751X05023323
Abstract: A strongly momentum-dependent dressed-quark mass function is basic to QCD. It is central to the appearance of a constituent-quark mass-scale and an existential prerequisite for Goldstone modes. Dyson-Schwinger equation (DSEs) studies have long emphasised this importance, and have proved that QCD's Goldstone modes are the only pseudoscalar mesons to possess a nonzero leptonic decay constant in the chiral limit when chiral symmetry is dynamically broken, while the decay constants of their radial excitations vanish. Such features are readily illustrated using a rainbow-ladder truncation of the DSEs. In this connection we find (in GeV): f η c (1S) =0.233, m η c (2S) =3.42 and support for interpreting η(1295), η(1470) as the first radial excitations of η(548), η′(958), respectively, and K(1460) as the first radial excitation of the kaon. Moreover, such radial excitations have electromagnetic diameters greater than 2 fm. This exceeds the spatial length of lattices used typically in contemporary lattice-QCD.
Publisher: Springer Science and Business Media LLC
Date: 27-01-2006
Publisher: WORLD SCIENTIFIC
Date: 09-2002
Publisher: World Scientific Pub Co Pte Lt
Date: 28-02-2003
DOI: 10.1142/S0217732303010478
Abstract: There is considerable interest in the possibility of extracting model independent information on the masses and other properties of hadrons from lattice QCD, even though the state of the art involves light quark masses considerably higher than those found in nature. We review the applicability of effective field theory to this problem. Taking the rho meson as an ex le, we show that conventional, dimensionally regularized field theory is not sufficiently convergent to provide a reliable method of extrapolation. The reason for the poor convergence is discussed, along with the solution which this suggests. Finally we outline a very interesting suggestion of a connection between hadron masses in full and quenched QCD, using the nucleon and delta as ex les.
Publisher: American Physical Society (APS)
Date: 22-02-2000
Publisher: Elsevier BV
Date: 05-2002
Publisher: Elsevier BV
Date: 06-1998
Publisher: Elsevier BV
Date: 06-2000
Publisher: Springer Science and Business Media LLC
Date: 08-2001
Publisher: Elsevier BV
Date: 05-2002
Publisher: Elsevier BV
Date: 2000
Publisher: American Physical Society (APS)
Date: 21-06-2005
Publisher: Elsevier BV
Date: 05-2003
Publisher: Elsevier BV
Date: 04-2002
Publisher: American Physical Society (APS)
Date: 09-07-2004
Publisher: Springer Science and Business Media LLC
Date: 25-05-2007
Publisher: American Physical Society (APS)
Date: 02-01-2007
Publisher: American Physical Society (APS)
Date: 27-11-2002
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Stewart Wright.