Semileptonic 𝑫 → 𝝅ℓ𝝂, 𝑫 → 𝑲ℓ𝝂 and 𝑫𝒔 → 𝑲ℓ𝝂 decays with 2+1f domain wall fermions

Peter Boyle, Luigi Del Debbio, Felix Erben, Jonathan Flynn, Andreas Jüttner, Michael Marshall, Antonin Portelli, J. Tobias Tsang, Oliver Witzel

Publikation: Kapitel i bog/rapport/konference-proceedingKonferencebidrag i proceedingsForskningpeer review

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We present the status of our project to calculate 𝐷 → 𝜋ℓ𝜈, 𝐷 → 𝐾ℓ𝜈 and 𝐷𝑠 → 𝐾ℓ𝜈 semileptonic form factors using domain wall fermions for both heavy and light quarks. Our computations are performed using RBC/UKQCD’s set of 2+1 flavour domain wall fermion and Iwasaki gauge field ensembles. We plan to calculate three-point functions covering the full, physically allowed kinematic range. Given that the signal decays faster than the noise, unambiguously and reliably extracting the ground state is critical for success. We include an analysis of operator diagonalisation within several possible 2 × 2 operator bases and find an admixture of gauged fixed wall and Z (2) wall sources to be acceptable at both zero and non-zero momentum. Initial results for semileptonic form factors are presented for first ensembles
Titel38th International Symposium on Lattice Field Theory (Lattice 2021)
StatusE-pub ahead of print - 7. jan. 2022


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