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Titolo:
Chiral behavior of the rho meson in lattice QCD - art. no. 094502
Autore:
Leinweber, DB; Thomas, AW; Tsushima, K; Wright, SV;
Indirizzi:
Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia Univ Adelaide Adelaide SA Australia 5005 ys, Adelaide, SA 5005, Australia Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia Univ Adelaide Adelaide SA Australia 5005 er, Adelaide, SA 5005, Australia
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 9, volume: 6409, anno: 2001,
pagine: 4502 -
SICI:
0556-2821(20011101)6409:9<4502:CBOTRM>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIGHT HADRON SPECTROSCOPY; ZWEIG-IIZUKA RULE; MAGNETIC-MOMENTS; EXTRAPOLATIONS; SPECTRUM; SYMMETRY; NUCLEON; MASSES; REGIME;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Leinweber, DB Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia Univ Adelaide Adelaide SA Australia 5005 SA 5005, Australia
Citazione:
D.B. Leinweber et al., "Chiral behavior of the rho meson in lattice QCD - art. no. 094502", PHYS REV D, 6409(9), 2001, pp. 4502

Abstract

In order to guide the extrapolation of the mass of the rho meson calculated in lattice QCD with dynamical fermions, we study the contributions to itsself-energy, which vary most rapidly as the quark mass approaches zero. from the processes p --> omega pi and rho-->pi pi. It turns out that in analyzing the most recent data from the CP-PACS Collaboration, it is crucial to estimate the self-energy from rho-->pi pi using the same grid of discrete momenta as included implicitly in the lattice simulation. The correction associated with the continuum infinite volume limit can then be found by calculating the corresponding integrals exactly. Our error analysis suggests that a factor of 10 improvement in statistics at the lowest quark mass for which data currently exists would allow one to determine the physical rho massto within 5%. Finally, our analysis throws light on a longstanding problemwith the J parameter.

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Documento generato il 09/04/20 alle ore 20:02:45