Joint lattice QCD–dispersion theory analysis confirms the quark-mixing top-row unitarity deficit

Recently, the first ever lattice computation of the γ W -box radiative correction to the rate of the semileptonic pion decay allowed for a reduction of the theory uncertainty of that rate by a factor of ∼ 3 . A recent dispersion evaluation of the γ W -box correction on the neutron also led to a sign...

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Veröffentlicht in:	Physical review. D 2020-06, Vol.101 (11), p.1, Article 111301
Hauptverfasser:	Seng, Chien-Yeah, Feng, Xu, Gorchtein, Mikhail, Jin, Lu-Chang
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy & Astrophysics Computation Dispersion Neutron decay Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Pions Quantum chromodynamics Reduction Uncertainty
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