Rare Kaon Decays in the $1/N_c$-Expansion

C. Bruno; J. Prades

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Rare Kaon Decays in the $1/N_c$-Expansion

C. Bruno, J. Prades

High Energy Physics - Phenomenology · Submitted 14 Sep 1992

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim The phenomenological implications are also discussed.

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What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.11 · human participants 0.01 · controlled comparison 0.01 · randomized assignment 0.01 · states quantitative result 0.04 · compares with prior results 0.07 · mentions code or data availability 0.02.

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We study the unknown coupling constants that appear at order $p^4$ in the Chiral Perturbation Theory analysis of $K \to \pi \gamma^* \to \pi l^+ l^-$, $K^{+-} \to \pi^{+-} \gamma \gamma$ and $K \to \pi \pi \gamma$ decays. To that end, we compute the chiral realization of the $\Delta S \, = \, 1$ Hamiltonian in the framework of the $1/N_c$-expansion of the low-energy action. The phenomenological implications are also discussed.

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What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We study the unknown coupling constants that appear at order $p^4$ in the Chiral Perturbation Theory analysis of $K \to \pi \gamma^* \to \pi l^+ l^-$, $K^{+-} \to \pi^{+-} \gamma \gamma$ and $K \to \pi \pi \gamma$ decays.	contribution 0.94	0.78	0.07	asserted 0.91
s1	To that end, we compute the chiral realization of the $\Delta S \, = \, 1$ Hamiltonian in the framework of the $1/N_c$-expansion of the low-energy action.	method 0.95	0.94	0.06	asserted 0.99
s2	The phenomenological implications are also discussed.	interpretation 0.80	0.58	0.04	asserted 0.59

What kind of paper the classifier reports this is: theoretical result 1.00 · evidence from proof or derivation 0.78.

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The paper

Original abstract

We study the unknown coupling constants that appear at order $p^4$ in the Chiral Perturbation Theory analysis of $K \to \pi \gamma^* \to \pi l^+ l^-$, $K^{+-} \to \pi^{+-} \gamma \gamma$ and $K \to \pi \pi \gamma$ decays. To that end, we compute the chiral realization of the $\Delta S \, = \, 1$ Hamiltonian in the framework of the $1/N_c$-expansion of the low-energy action. The phenomenological implications are also discussed.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

Leptoquarks meet $\varepsilon'/\varepsilon$ and rare Kaon processes
hep-ph 2017-12 accept novelty 7.0 of 10

No leptoquark model with a single coupling can explain the epsilon'/epsilon anomaly without exceeding experimental bounds on rare kaon decays, and multi-coupling models are strongly constrained.
Improving lepton flavour universality tests with $K_L$ decays
hep-ph 2026-08 conditional novelty 6.0 of 10

Future KOTO-II measurements of rare neutral kaon decays could distinguish between two viable new physics scenarios that current data and NA62 alone leave overlapping.
Rare K and B Decays in a Warped Extra Dimension with Custodial Protection
hep-ph 2008-12 conditional novelty 6.0 of 10

In a custodially protected Randall-Sundrum model, tree-level right-handed Z exchange can raise Br(K_L to pi0 nu nu-bar) by up to a factor of five while shifting rare B branching ratios by at most about 20 percent.
The Anatomy of Z' and Z with Flavour Changing Neutral Currents in the Flavour Precision Era
hep-ph 2012-11 conditional novelty 5.0 of 10

For a tree-level flavour-changing Z-prime, fixing quark couplings from meson-mixing data yields parameter-free predictions for rare K and B decays, and the resulting correlations can separate left-handed, right-handed...

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