Momentum transfer dependence of kaon semileptonic form factor on (10 fm)⁴ at the physical point

2022/12/01 by Takeshi Yamazaki, Ken-Ichi Ishikawa, Yamazaki, Takeshi +13
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2212.00255

openalex publication_date 2022/12/01 · openalex created_date 2022/12/13 · openalex updated_date 2026/07/28

Abstract

We calculate the kaon semileptonic form factors using the two sets of the PACS10 configuration, whose physical volumes are more than (10 fm)⁴ at the physical point. The lattice spacings are 0.063 and 0.085 fm. The configurations were generated using the Iwasaki gauge action and N_f=2+1 stout-smeared nonperturbatively O(a)-improved Wilson quark action. From the momentum transfer dependence of the form factors, we evaluate the slope and curvature for the form factors at the zero momentum transfer. Furthermore, we calculate the phase space factor, which is used to obtain |V_us| through the kaon semileptonic decay. These results are compared with previous lattice results and experimental values.

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