Final state rescattering effects in axio-hadronic η and η′ decays

Alves, Daniele S.M.; Gonzàlez-Solís, Sergi

doi:10.1007/JHEP07(2024)264

Final state rescattering effects in axio-hadronic η and η′ decays

Daniele S.M. Alves
(
- Los Alamos
)
,
Sergi Gonzàlez-Solís
(
- Los Alamos and
- Barcelona U. and
- ICC, Barcelona U.
)

Feb 5, 2024

29 pages

Published in:

JHEP 07 (2024) 264

Published: Jul 30, 2024

e-Print:

2402.02993 [hep-ph]

DOI:

10.1007/JHEP07(2024)264

Report number:

LA-UR-24-20793

View in:

ADS Abstract Service

reference search6 citations

Citations per year

Abstract: (Springer)

It has been long-understood that final state rescattering effects provide

\mathcal{O}

(1) corrections to hadronic meson decays rates, such as η → πππ and η′ → ηππ. Hence, one would expect that such effects would be just as important in axio-hadronic η and η′ decays, such as η

^{(}

′

^{)}

→ ππa, where a is an axion or axion-like particle (ALP). And indeed they are, as we show in this paper by using the treatment of dispersion relations to include the effects of strong final state interactions in several axio-hadronic processes, namely, η

^{(}

′

^{)}

→ π

^{0}

π

^{0}

a, η

^{(}

′

^{)}

→ π

^{+}

π

^{−}

a, and η′ → ηπ

^{0}

a. We also compute the perturbative, leading order decay rates for multiple ALP emission, such as in η

^{(}

′

^{)}

→ π

^{0}

aa, η′ → ηaa and η

^{(}

′

^{)}

→ aaa, and briefly discuss the expected corrections from strong interactions and the processes that must be considered for an accurate rate estimation of these multi-ALP decay channels.

Note:

29 pages, 9 figures

Axions and ALPs
Chiral Lagrangian
New Light Particles
eta: decay
eta(958): decay
higher-order: 0
decay rate
axion-like particles
strong interaction
dispersion relation

References(0)

Figures(15)

Loading ...