Isospin splittings of meson and baryon masses from three-flavor lattice QCD + QED

R. Horsley; Y. Nakamura; H. Perlt; D. Pleiter; P. E. L. Rakow; G. Schierholz; A. Schiller; R. Stokes; H. Stüben; R. D. Young; J. M. Zanotti

doi:10.1088/0954-3899/43/10/10LT02

Isospin splittings of meson and baryon masses from three-flavor lattice QCD + QED

R. Horsley, Y. Nakamura, H. Perlt, D. Pleiter, P. E. L. Rakow, G. Schierholz, A. Schiller, R. Stokes, H. Stüben, R. D. Young, J. M. Zanotti

School of Physics and Astronomy

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

Abstract

Lattice QCD simulations are now reaching a precision where isospin breaking effects become important. Previously, we have developed a program to systematically investigate the pattern of flavor symmetry beaking within QCD and successfully applied it to meson and baryon masses involving up, down and strange quarks. In this Letter we extend the calculations to QCD + QED and present our first results on isospin splittings in the pseudoscalar meson and baryon octets. In particular, we obtain the nucleon mass difference of $M_n-M_p=1.35(18)(8)\,\mbox{MeV}$ and the electromagnetic contribution to the pion splitting $M_{\pi^+}-M_{\pi^0}=4.60(20)\,\mbox{MeV}$. Further we report first determination of the separation between strong and electromagnetic contributions in the $\bar{MS}$ scheme.

Original language	English
Journal	Journal of Physics G: Nuclear and Particle Physics
Volume	43
Issue number	10
DOIs	https://doi.org/10.1088/0954-3899/43/10/10LT02
Publication status	Published - 12 Sept 2016

Keywords / Materials (for Non-textual outputs)

hep-lat
hep-ph
nucl-th

Access to Document

10.1088/0954-3899/43/10/10LT02

http://arxiv.org/abs/1508.06401v2

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

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

Cite this

@article{bd24195ee4ee43d08f8d928ce53c0187,

title = "Isospin splittings of meson and baryon masses from three-flavor lattice QCD + QED",

abstract = "Lattice QCD simulations are now reaching a precision where isospin breaking effects become important. Previously, we have developed a program to systematically investigate the pattern of flavor symmetry beaking within QCD and successfully applied it to meson and baryon masses involving up, down and strange quarks. In this Letter we extend the calculations to QCD + QED and present our first results on isospin splittings in the pseudoscalar meson and baryon octets. In particular, we obtain the nucleon mass difference of $M_n-M_p=1.35(18)(8)\,\mbox{MeV}$ and the electromagnetic contribution to the pion splitting $M_{\pi^+}-M_{\pi^0}=4.60(20)\,\mbox{MeV}$. Further we report first determination of the separation between strong and electromagnetic contributions in the $\bar{MS}$ scheme.",

keywords = "hep-lat, hep-ph, nucl-th",

author = "R. Horsley and Y. Nakamura and H. Perlt and D. Pleiter and Rakow, {P. E. L.} and G. Schierholz and A. Schiller and R. Stokes and H. St{\"u}ben and Young, {R. D.} and Zanotti, {J. M.}",

note = "14 pages, 10 figures, text and figures added, Journal version",

year = "2016",

month = sep,

day = "12",

doi = "10.1088/0954-3899/43/10/10LT02",

language = "English",

volume = "43",

journal = "Journal of Physics G: Nuclear and Particle Physics",

issn = "0954-3899",

publisher = "IOP Publishing",

number = "10",

}

TY - JOUR

T1 - Isospin splittings of meson and baryon masses from three-flavor lattice QCD + QED

AU - Horsley, R.

AU - Nakamura, Y.

AU - Perlt, H.

AU - Pleiter, D.

AU - Rakow, P. E. L.

AU - Schierholz, G.

AU - Schiller, A.

AU - Stokes, R.

AU - Stüben, H.

AU - Young, R. D.

AU - Zanotti, J. M.

N1 - 14 pages, 10 figures, text and figures added, Journal version

PY - 2016/9/12

Y1 - 2016/9/12

N2 - Lattice QCD simulations are now reaching a precision where isospin breaking effects become important. Previously, we have developed a program to systematically investigate the pattern of flavor symmetry beaking within QCD and successfully applied it to meson and baryon masses involving up, down and strange quarks. In this Letter we extend the calculations to QCD + QED and present our first results on isospin splittings in the pseudoscalar meson and baryon octets. In particular, we obtain the nucleon mass difference of $M_n-M_p=1.35(18)(8)\,\mbox{MeV}$ and the electromagnetic contribution to the pion splitting $M_{\pi^+}-M_{\pi^0}=4.60(20)\,\mbox{MeV}$. Further we report first determination of the separation between strong and electromagnetic contributions in the $\bar{MS}$ scheme.

AB - Lattice QCD simulations are now reaching a precision where isospin breaking effects become important. Previously, we have developed a program to systematically investigate the pattern of flavor symmetry beaking within QCD and successfully applied it to meson and baryon masses involving up, down and strange quarks. In this Letter we extend the calculations to QCD + QED and present our first results on isospin splittings in the pseudoscalar meson and baryon octets. In particular, we obtain the nucleon mass difference of $M_n-M_p=1.35(18)(8)\,\mbox{MeV}$ and the electromagnetic contribution to the pion splitting $M_{\pi^+}-M_{\pi^0}=4.60(20)\,\mbox{MeV}$. Further we report first determination of the separation between strong and electromagnetic contributions in the $\bar{MS}$ scheme.

KW - hep-lat

KW - hep-ph

KW - nucl-th

U2 - 10.1088/0954-3899/43/10/10LT02

DO - 10.1088/0954-3899/43/10/10LT02

M3 - Article

SN - 0954-3899

VL - 43

JO - Journal of Physics G: Nuclear and Particle Physics

JF - Journal of Physics G: Nuclear and Particle Physics

IS - 10

ER -

Isospin splittings of meson and baryon masses from three-flavor lattice QCD + QED

Abstract

Keywords / Materials (for Non-textual outputs)

Access to Document

Fingerprint

Projects

Particle Theory at the Higgs Centre

Profiles

Roger Horsley

Cite this