Semileptonic $b \to u$ decays and $|V_{ub}|$ - INSPIRE

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Semileptonic $b \to u$ decays and $|V_{ub}|$

Jonna Koponen
(
- U. Mainz, PRISMA and
- Mainz U.
)

May 16, 2022

11 pages

Published in:

PoS LATTICE2021 (2022) 015

Contribution to:

- Lattice 2021
, 015

Published: May 16, 2022

DOI:

10.22323/1.396.0015

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Abstract: (SISSA)

The Cabibbo–Kobayashi–Maskawa (CKM) matrix element

|V_{ub}|

describes the coupling between

u

and

b

quarks in the weak interaction, and is one of the fundamental parameters of the Standard Model.

|V_{ub}|

is the focus of a longstanding puzzle, as the world-average values derived from inclusive and exclusive

B

-meson decays show a tension of a few standard deviations. Semileptonic decays can be used to extract CKM elements by combining a lattice QCD calculation of the form factors and experimental branching fractions. In this report we will focus on the recent progress in lattice QCD calculations and the current status of

|V_{ub}|

.

lattice field theory
CKM matrix
branching ratio
semileptonic decay
quark
weak interaction
form factor

References(27)

Figures(0)

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