Topological index theorem on the lattice through the spectral flow of staggered fermions

Azcoiti, V. (Universidad de Zaragoza) ; Follana, E. (Universidad de Zaragoza) ; Vaquero, A. ; Di Carlo, G.

Resumen: We investigate numerically the spectral flow introduced by Adams for the staggered Dirac operator on realistic (quenched) gauge configurations. We obtain clear numerical evidence that the definition works as expected: there is a clear separation between crossings near and far away from the origin, and the topological charge defined through the crossings near the origin agrees, for most configurations, with the one defined through the near-zero modes of large taste-singlet chirality of the staggered Dirac operator. The crossings are much closer to the origin if we improve the Dirac operator used in the definition, and they move towards the origin as we decrease the lattice spacing.

Idioma: Inglés

DOI: 10.1016/j.physletb.2015.03.049

Año: 2015

Publicado en: Physics Letters B 744 (2015), 303-308
ISSN: 0370-2693

Factor impacto JCR: 4.787 (2015)

Categ. JCR: ASTRONOMY & ASTROPHYSICS rank: 14 / 62 = 0.226 (2015) - Q1 - T1
Categ. JCR: PHYSICS, NUCLEAR rank: 4 / 21 = 0.19 (2015) - Q1 - T1
Categ. JCR: PHYSICS, PARTICLES & FIELDS rank: 7 / 28 = 0.25 (2015) - Q1 - T1

Factor impacto SCIMAGO: 3.32 - Nuclear and High Energy Physics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E24-2
Financiación: info:eu-repo/grantAgreement/EC/FP7/238353/EU/Strong Interaction Supercomputing Training Network/STRONGNET
Financiación: info:eu-repo/grantAgreement/ES/INFN–MICINN/AIC-D-2011-0663
Financiación: info:eu-repo/grantAgreement/ES/MICINN/FPA2008-10732
Financiación: info:eu-repo/grantAgreement/ES/MICINN/FPA2009-09638

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Teórica (Dpto. Física Teórica)