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arxiv: 2205.15373 · v2 · pith:QQKV4OYR · submitted 2022-05-30 · hep-lat · hep-ex· hep-ph

A lattice QCD perspective on weak decays of b and c quarks Snowmass 2022 White Paper

Peter A. Boyle , Bipasha Chakraborty , Christine T.H. Davies , Thomas DeGrand , Carleton DeTar , Luigi Del Debbio , Aida X. El-Khadra , Felix Erben
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Jonathan M. Flynn Elvira G\'amiz Davide Giusti Steven Gottlieb Maxwell T. Hansen Jochen Heitger Ryan Hill William I. Jay Andreas J\"uttner Jonna Koponen Andreas Kronfeld Christoph Lehner Andrew T. Lytle Guido Martinelli Stefan Meinel Christopher J. Monahan Ethan T. Neil Antonin Portelli James N. Simone Silvano Simula Rainer Sommer Amarjit Soni J. Tobias Tsang Ruth S. Van de Water Alejandro Vaquero Ludovico Vittorio Oliver Witzel
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classification hep-lat hep-exhep-ph
keywords latticeweakcalculationscommunitydecaysfuturephysicssnowmass
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Lattice quantum chromodynamics has proven to be an indispensable method to determine nonperturbative strong contributions to weak decay processes. In this white paper for the Snowmass community planning process we highlight achievements and future avenues of research for lattice calculations of weak $b$ and $c$ quark decays, and point out how these calculations will help to address the anomalies currently in the spotlight of the particle physics community. With future increases in computational resources and algorithmic improvements, percent level (and below) lattice determinations will play a central role in constraining the standard model or identifying new physics.

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  1. Hadronic tau decays at higher orders in QCD

    hep-ph 2026-01 unverdicted novelty 5.0

    Sequence transformations applied to the fixed-order QCD series for hadronic tau decays produce estimates c5,1 = 298 ± 15, c6,1 = 3431 ± 256, c7,1 = 2.29 ± 0.29 × 10^4 and a predicted δ^(0)_FOPT = 0.2119 ± 0.0040.