Magnetic form factors of the octet baryons from lattice QCD and chiral extrapolation

CSSM Collaborations; QCDSF UKQCD Collaborations; P. E. Shanahan; R. Horsley; Y. Nakamura; D. Pleiter; P. E. L. Rakow; G. Schierholz; H. Stueben; A. W. Thomas; R. D. Young; J. M. Zanotti

doi:10.1103/PhysRevD.89.074511

Magnetic form factors of the octet baryons from lattice QCD and chiral extrapolation

CSSM Collaborations, QCDSF UKQCD Collaborations, P. E. Shanahan^*, R. Horsley, Y. Nakamura, D. Pleiter, P. E. L. Rakow, G. Schierholz, H. Stueben, A. W. Thomas, R. D. Young, J. M. Zanotti

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract

We present a 2 + 1-flavor lattice QCD calculation of the electromagnetic Dirac and Pauli form factors of the octet baryons. The magnetic Sachs form factor is extrapolated at six fixed values of Q(2) to the physical pseudoscalar masses and infinite volume using a formulation based on heavy-baryon chiral perturbation theory with finite-range regularization. We properly account for omitted disconnected quark contractions using a partially quenched effective field theory formalism. The results compare well with the experimental form factors of the nucleon and the magnetic moments of the octet baryons.

Original language	English
Article number	074511
Number of pages	20
Journal	Physical Review D
Volume	89
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.89.074511
Publication status	Published - 18 Apr 2014

Keywords / Materials (for Non-textual outputs)

PERTURBATION-THEORY
QUARK MASS
NUCLEON
MOMENTS
RATIO

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10.1103/PhysRevD.89.074511

Roger Horsley
- rhorsleyph.ed.acuk
- School of Physics and Astronomy - Reader
Person: Academic: Research Active

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CSSM Collaborations, QCDSF UKQCD Collaborations, Shanahan, P. E., Horsley, R., Nakamura, Y., Pleiter, D., Rakow, P. E. L., Schierholz, G., Stueben, H., Thomas, A. W., Young, R. D., & Zanotti, J. M. (2014). Magnetic form factors of the octet baryons from lattice QCD and chiral extrapolation. Physical Review D, 89(7), Article 074511. https://doi.org/10.1103/PhysRevD.89.074511

@article{ec80a228ca01465ca483c14d058432fb,

title = "Magnetic form factors of the octet baryons from lattice QCD and chiral extrapolation",

abstract = "We present a 2 + 1-flavor lattice QCD calculation of the electromagnetic Dirac and Pauli form factors of the octet baryons. The magnetic Sachs form factor is extrapolated at six fixed values of Q(2) to the physical pseudoscalar masses and infinite volume using a formulation based on heavy-baryon chiral perturbation theory with finite-range regularization. We properly account for omitted disconnected quark contractions using a partially quenched effective field theory formalism. The results compare well with the experimental form factors of the nucleon and the magnetic moments of the octet baryons.",

keywords = "PERTURBATION-THEORY, QUARK MASS, NUCLEON, MOMENTS, RATIO",

author = "\{CSSM Collaborations\} and \{QCDSF UKQCD Collaborations\} and Shanahan, \{P. E.\} and R. Horsley and Y. Nakamura and D. Pleiter and Rakow, \{P. E. L.\} and G. Schierholz and H. Stueben and Thomas, \{A. W.\} and Young, \{R. D.\} and Zanotti, \{J. M.\}",

year = "2014",

month = apr,

day = "18",

doi = "10.1103/PhysRevD.89.074511",

language = "English",

volume = "89",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "American Physical Society",

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TY - JOUR

T1 - Magnetic form factors of the octet baryons from lattice QCD and chiral extrapolation

AU - CSSM Collaborations

AU - QCDSF UKQCD Collaborations

AU - Shanahan, P. E.

AU - Horsley, R.

AU - Nakamura, Y.

AU - Pleiter, D.

AU - Rakow, P. E. L.

AU - Schierholz, G.

AU - Stueben, H.

AU - Thomas, A. W.

AU - Young, R. D.

AU - Zanotti, J. M.

PY - 2014/4/18

Y1 - 2014/4/18

N2 - We present a 2 + 1-flavor lattice QCD calculation of the electromagnetic Dirac and Pauli form factors of the octet baryons. The magnetic Sachs form factor is extrapolated at six fixed values of Q(2) to the physical pseudoscalar masses and infinite volume using a formulation based on heavy-baryon chiral perturbation theory with finite-range regularization. We properly account for omitted disconnected quark contractions using a partially quenched effective field theory formalism. The results compare well with the experimental form factors of the nucleon and the magnetic moments of the octet baryons.

AB - We present a 2 + 1-flavor lattice QCD calculation of the electromagnetic Dirac and Pauli form factors of the octet baryons. The magnetic Sachs form factor is extrapolated at six fixed values of Q(2) to the physical pseudoscalar masses and infinite volume using a formulation based on heavy-baryon chiral perturbation theory with finite-range regularization. We properly account for omitted disconnected quark contractions using a partially quenched effective field theory formalism. The results compare well with the experimental form factors of the nucleon and the magnetic moments of the octet baryons.

KW - PERTURBATION-THEORY

KW - QUARK MASS

KW - NUCLEON

KW - MOMENTS

KW - RATIO

U2 - 10.1103/PhysRevD.89.074511

DO - 10.1103/PhysRevD.89.074511

M3 - Article

SN - 1550-7998

VL - 89

JO - Physical Review D

JF - Physical Review D

IS - 7

M1 - 074511

ER -

Magnetic form factors of the octet baryons from lattice QCD and chiral extrapolation

Abstract

Keywords / Materials (for Non-textual outputs)

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Roger Horsley

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