The Kaon Bag Parameter at Physical Mass

2013/12/09 by Julien Frison, Peter Boyle, Frison, Julien +13
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat

paper · pdf · doi:10.48550/arxiv.1312.2374

presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), 29 July - 3 August 2013, Mainz, Germany

arxiv created 2013/12/09 · openalex publication_date 2013/12/09 · arxiv updated 2013/12/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

We present preliminary results for the calculation of the Kaon Bag parameter B_K in N_f=2+1 lattice QCD, using Möbius Domain Wall Fermion ensembles generated by the RBC-UKQCD collaboration. This computation is done directly at physical meson masses, so that we do not have to rely on chiral perturbation theory or any other mass extrapolation. In parallel, the four-quark operator is renormalised through the Rome-Southampton technique. Finally, we compare our value with previous results and draw some conclusions about the remaining dominant contributions in our error budget.

Related

• BSM Kaon Mixing at the Physical Point
• The Kaon B-parameter from Two-Flavour Dynamical Domain Wall Fermions
• Status of B_K from Lattice QCD
• K0-K0bar on the Lattice
• The kaon semileptonic form factor in Nf=2+1 domain wall lattice QCD with physical light quark masses