SU(3) breaking in hyperon transition vector form factors

P. E. Shanahan; A. N. Cooke; R. Horsley; Y. Nakamura; P. E. L. Rakow; G. Schierholz; A. W. Thomas; R. D. Young; J. M. Zanotti

doi:10.1103/PhysRevD.92.074029

SU(3) breaking in hyperon transition vector form factors

P. E. Shanahan^*, A. N. Cooke, R. Horsley, Y. Nakamura, P. E. L. Rakow, G. Schierholz, A. W. Thomas, R. D. Young, J. M. Zanotti

^*Corresponding author for this work

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

Abstract

We present a calculation of the SU(3)-breaking corrections to the hyperon transition vector form factors to O(p(4)) in heavy-baryon chiral perturbation theory with finite-range regularization. Both octet and decuplet degrees of freedom are included. We formulate a chiral expansion at the kinematic point Q(2) = -(M-B1-M-B2)(2), which can be conveniently accessed in lattice QCD. The two unknown low-energy lconstants at this point are constrained by lattice QCD simulation results for the Sigma(-) -> n and Xi(0) -> Sigma(+) transition form factors. Hence, we determine lattice-informed values of f(1) at the physical point. This work constitutes progress toward the precise determination of vertical bar V-us vertical bar from hyperon semileptonic decays.

Original language	English
Article number	074029
Number of pages	11
Journal	Physical Review D
Volume	92
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.92.074029
Publication status	Published - 21 Oct 2015

Keywords / Materials (for Non-textual outputs)

BETA-DECAY
LATTICE QCD
QUARK-MODEL
MASS

Access to Document

10.1103/PhysRevD.92.074029

Particle Theory at the Higgs Centre
Ball, R., Berera, A., Boyle, P., Callison-Burch, C., Del Debbio, L., Gardi, E., Kennedy, A., O'Connell, D., Zwicky, R., Berera, A., Boyle, P., Buckley, A., Del Debbio, L., Gardi, E., Horsley, R., Kennedy, A., Kenway, R., O'Connell, D., Smillie, J. & Zwicky, R.
STFC
1/10/14 → 30/09/18
Project: Research

Cite this

@article{f706d18c8bfa4b6cbf9f10db7f993664,

title = "SU(3) breaking in hyperon transition vector form factors",

abstract = "We present a calculation of the SU(3)-breaking corrections to the hyperon transition vector form factors to O(p(4)) in heavy-baryon chiral perturbation theory with finite-range regularization. Both octet and decuplet degrees of freedom are included. We formulate a chiral expansion at the kinematic point Q(2) = -(M-B1-M-B2)(2), which can be conveniently accessed in lattice QCD. The two unknown low-energy lconstants at this point are constrained by lattice QCD simulation results for the Sigma(-) -> n and Xi(0) -> Sigma(+) transition form factors. Hence, we determine lattice-informed values of f(1) at the physical point. This work constitutes progress toward the precise determination of vertical bar V-us vertical bar from hyperon semileptonic decays.",

keywords = "BETA-DECAY, LATTICE QCD, QUARK-MODEL, MASS",

author = "Shanahan, {P. E.} and Cooke, {A. N.} and R. Horsley and Y. Nakamura and Rakow, {P. E. L.} and G. Schierholz and Thomas, {A. W.} and Young, {R. D.} and Zanotti, {J. M.}",

year = "2015",

month = oct,

day = "21",

doi = "10.1103/PhysRevD.92.074029",

language = "English",

volume = "92",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "American Physical Society",

number = "7",

}

TY - JOUR

T1 - SU(3) breaking in hyperon transition vector form factors

AU - Shanahan, P. E.

AU - Cooke, A. N.

AU - Horsley, R.

AU - Nakamura, Y.

AU - Rakow, P. E. L.

AU - Schierholz, G.

AU - Thomas, A. W.

AU - Young, R. D.

AU - Zanotti, J. M.

PY - 2015/10/21

Y1 - 2015/10/21

N2 - We present a calculation of the SU(3)-breaking corrections to the hyperon transition vector form factors to O(p(4)) in heavy-baryon chiral perturbation theory with finite-range regularization. Both octet and decuplet degrees of freedom are included. We formulate a chiral expansion at the kinematic point Q(2) = -(M-B1-M-B2)(2), which can be conveniently accessed in lattice QCD. The two unknown low-energy lconstants at this point are constrained by lattice QCD simulation results for the Sigma(-) -> n and Xi(0) -> Sigma(+) transition form factors. Hence, we determine lattice-informed values of f(1) at the physical point. This work constitutes progress toward the precise determination of vertical bar V-us vertical bar from hyperon semileptonic decays.

AB - We present a calculation of the SU(3)-breaking corrections to the hyperon transition vector form factors to O(p(4)) in heavy-baryon chiral perturbation theory with finite-range regularization. Both octet and decuplet degrees of freedom are included. We formulate a chiral expansion at the kinematic point Q(2) = -(M-B1-M-B2)(2), which can be conveniently accessed in lattice QCD. The two unknown low-energy lconstants at this point are constrained by lattice QCD simulation results for the Sigma(-) -> n and Xi(0) -> Sigma(+) transition form factors. Hence, we determine lattice-informed values of f(1) at the physical point. This work constitutes progress toward the precise determination of vertical bar V-us vertical bar from hyperon semileptonic decays.

KW - BETA-DECAY

KW - LATTICE QCD

KW - QUARK-MODEL

KW - MASS

U2 - 10.1103/PhysRevD.92.074029

DO - 10.1103/PhysRevD.92.074029

M3 - Article

SN - 1550-7998

VL - 92

JO - Physical Review D

JF - Physical Review D

IS - 7

M1 - 074029

ER -

SU(3) breaking in hyperon transition vector form factors

Abstract

Keywords / Materials (for Non-textual outputs)

Access to Document

Fingerprint

Projects

Particle Theory at the Higgs Centre

Cite this