Form factors of the D_s → ϕℓ ν_ℓ semileptonic decay with (2+1)-flavor lattice QCD

2025/12/25 by Gaofeng Fan, Fan, Gaofeng, Yu Meng +13
Physics and Astronomy · Computer Science · #Quantum Chromodynamics and Particle Interactions #Particle physics theoretical and experimental studies #Computational Physics and Python Applications

paper · doi:10.48550/arxiv.2512.21607

Abstract

We present a systematic lattice calculation of the vector and axial vector form factors V and A_i~(i=0,1,2) for the D_s → ϕℓ ν_ℓ semileptonic decay using (2+1)-flavor Wilson-clover fermion configurations generated by the CLQCD collaboration. Seven gauge ensembles with different lattice spacings, from 0.052~fm to 0.105~fm, and different pion masses, from about 210~MeV to 320~MeV are utilized, enabling us to take both the continuum limit and physical pion mass extrapolation. The form factor ratios are obtained to be r_V=1.614(19) and r₂=0.741(31). Our results of form factors reach the precision of 1%-4%, which greatly improves the previous lattice QCD results and obtains the most precise determination to date.

Related

• Study of the D_s → ϕℓ ν_ℓ semileptonic decay with (2+1)-flavor lattice QCD
• D semileptonic form factors and |V_cs(d)| from 2+1 flavor lattice QCD
• Study of the Λ→ p ℓ ν_ℓ semileptonic decay in lattice QCD
• Semileptonic B\→\π\ℓ\ν, B\→ D\ℓ\ν, B_s\→ K\ℓ\ν, and\n B_s\→ D_s\ℓ\ν decays
• D-meson semileptonic form factors at zero momentum transfer in (2+1+1)-flavor lattice QCD