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Anomalies in Hadronic

B

Decays

https://doi.org/10.1103/PhysRevLett.133.211802

Berthiaume, Raphaël; Bhattacharya, Bhubanjyoti; Boumris, Rida; Jean, Alexandre; Kumbhakar, Suman; London, David (November 2024, Physical Review Letters)

In this Letter, we perform fits to

B \to P P

decays, where

B = {B^{0}, B^{+}, B_{s}^{0}}

and the pseudoscalar

P = {π, K}

, under the assumption of flavor SU(3) symmetry [

{SU (3)}_{F}

]. Although the fits to

Δ S = 0

Δ S = 1

decays individually are good, the combined fit is very poor: there is a

3.6 σ

disagreement with the

{SU (3)}_{F}

limit of the standard model (

{SM}_{{SU (3)}_{F}}

). One can remove this discrepancy by adding

{SU (3)}_{F}

-breaking effects, but 1000%

{SU (3)}_{F}

breaking is required. The above results are rigorous, group theoretically—no dynamical assumptions have been made. When one adds an assumption motivated by QCD factorization, the discrepancy with the

{SM}_{{SU (3)}_{F}}

grows to

4.4 σ

. Published by the American Physical Society2024

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