Δ-baryon electromagnetic form factors in lattice QCD

C. Alexandrou; T. Korzec; G. Koutsou; Th Leontiou; C. Lorcé; J. W. Negele; V. Pascalutsa; A. Tsapalis; M. Vanderhaeghen

doi:10.1103/PhysRevD.79.014507

Δ-baryon electromagnetic form factors in lattice QCD

C. Alexandrou
, T. Korzec
, G. Koutsou
, Th Leontiou
, C. Lorcé
, J. W. Negele
, V. Pascalutsa
, A. Tsapalis
, M. Vanderhaeghen

Research output: Contribution to journal › Article › peer-review

Abstract

We develop techniques to calculate the four Δ electromagnetic form factors using lattice QCD, with particular emphasis on the subdominant electric quadrupole form factor that probes deformation of the Δ. Results are presented for pion masses down to approximately 350 MeV for three cases: quenched QCD, two flavors of dynamical Wilson quarks, and three flavors of quarks described by a mixed action combining domain-wall valence quarks and dynamical staggered sea quarks. The magnetic moment of the Δ is compared with chiral effective field theory calculations and the Δ charge density distributions are discussed.

Original language	English
Article number	014507
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	79
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevD.79.014507
Publication status	Published - 5 Jan 2009
Externally published	Yes

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10.1103/PhysRevD.79.014507

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title = "Δ-baryon electromagnetic form factors in lattice QCD",

abstract = "We develop techniques to calculate the four Δ electromagnetic form factors using lattice QCD, with particular emphasis on the subdominant electric quadrupole form factor that probes deformation of the Δ. Results are presented for pion masses down to approximately 350 MeV for three cases: quenched QCD, two flavors of dynamical Wilson quarks, and three flavors of quarks described by a mixed action combining domain-wall valence quarks and dynamical staggered sea quarks. The magnetic moment of the Δ is compared with chiral effective field theory calculations and the Δ charge density distributions are discussed.",

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AU - Alexandrou, C.

AU - Korzec, T.

AU - Koutsou, G.

AU - Leontiou, Th

AU - Lorcé, C.

AU - Negele, J. W.

AU - Pascalutsa, V.

AU - Tsapalis, A.

AU - Vanderhaeghen, M.

PY - 2009/1/5

Y1 - 2009/1/5

N2 - We develop techniques to calculate the four Δ electromagnetic form factors using lattice QCD, with particular emphasis on the subdominant electric quadrupole form factor that probes deformation of the Δ. Results are presented for pion masses down to approximately 350 MeV for three cases: quenched QCD, two flavors of dynamical Wilson quarks, and three flavors of quarks described by a mixed action combining domain-wall valence quarks and dynamical staggered sea quarks. The magnetic moment of the Δ is compared with chiral effective field theory calculations and the Δ charge density distributions are discussed.

AB - We develop techniques to calculate the four Δ electromagnetic form factors using lattice QCD, with particular emphasis on the subdominant electric quadrupole form factor that probes deformation of the Δ. Results are presented for pion masses down to approximately 350 MeV for three cases: quenched QCD, two flavors of dynamical Wilson quarks, and three flavors of quarks described by a mixed action combining domain-wall valence quarks and dynamical staggered sea quarks. The magnetic moment of the Δ is compared with chiral effective field theory calculations and the Δ charge density distributions are discussed.

U2 - 10.1103/PhysRevD.79.014507

DO - 10.1103/PhysRevD.79.014507

M3 - Article

AN - SCOPUS:60349090704

SN - 1550-7998

VL - 79

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 1

M1 - 014507

ER -

Δ-baryon electromagnetic form factors in lattice QCD

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