| Article | |
| Report number | arXiv:2202.08795 ; CERN-TH-2022-037 |
| Title | Simulating rare kaon decays $K^{+}\to\pi^{+}\ell^{+}\ell^{-}$ using domain wall lattice QCD with physical light quark masses |
| Author(s) | Boyle, P.A. (Edinburgh U. ; Brookhaven) ; Erben, F. (Edinburgh U.) ; Flynn, J.M. (Southampton U. ; U. Southampton (main)) ; Gülpers, V. (Edinburgh U.) ; Hill, R.C. (Edinburgh U. ; Southampton U.) ; Hodgson, R. (Edinburgh U.) ; Jüttner, A. (Southampton U. ; U. Southampton (main) ; CERN) ; hÓgáin, F.Ó. (Edinburgh U.) ; Portelli, A. (Edinburgh U.) ; Sachrajda, C.T. (Southampton U.) |
| Collaboration | RBC Collaboration ; UKQCD Collaboration |
| Publication | 2023-01-01 |
| Imprint | 2022-02-17 |
| Number of pages | 11 |
| Note | 11 pages, 8 figures |
| In: | Phys. Rev. D 107, 1 (2023) pp.L011503 |
| DOI | 10.1103/PhysRevD.107.L011503 (publication) 10.1103/PhysRevD.107.L011503 (publication) |
| Subject category | hep-ph ; Particle Physics - Phenomenology ; hep-lat ; Particle Physics - Lattice |
| Abstract | We report the first calculation using physical light-quark masses of the electromagnetic form factor $V(z)$ describing the long-distance contributions to the $K^+\to\pi^+\ell^+\ell^-$ decay amplitude. The calculation is performed on a 2+1 flavor domain wall fermion ensemble with inverse lattice spacing $a^{-1}=1.730(4)$GeV. We implement a Glashow-Iliopoulos-Maiani cancellation by extrapolating to the physical charm-quark mass from three below-charm masses. We obtain $V(z=0.013(2))=-0.87(4.44)$, achieving a bound for the value. The large statistical error arises from stochastically estimated quark loops. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: Published by the American Physical Society (License: CC BY 4.0), sponsored by SCOAP³ |
Corresponding record in: Inspire
Journalen skapades 2022-02-18, och modifierades senast 2024-09-21
