Study of the decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">K</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>→<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1

Alliegro, C.; Campagnari, C.; Chaloupka, V.; Cooper, P. S.; Egger, J.; Gordon, H. A.; Hadley, N. J.; Herold, W.; Kaspar, H.; Lee, A.M.; Lazarus, D. M.; Lubatti, H. J.; Řehák, P.; Zeller, M.; Zhao, T. C.

doi:10.1103/physrevlett.68.278

Cited by 66 publications

(77 citation statements)

References 18 publications

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“…On the basis of this model-independent analysis, we conclude that the central values of the µ/e ratio [7] and the slope of the electron spectrum [6] together are not consistent. The ∼ 2σ discrepancy can be due to a statistical fluctuation or could be an indication of peculiar non-standard physics.…”

Section: 3mentioning

confidence: 99%

“…At O(p 4 ) only negative values of a + are allowed [6]. However, in general there can be a second branch of solutions with positive a + .…”

Section: 3mentioning

confidence: 99%

“…which, together with the results from [6], implies a muon/electron ratio Comparison between different shapes of the K + → π + e + e − form factor for a + > 0 (as in Fig. 3).…”

Section: 3mentioning

confidence: 99%

“…In the Brookhaven experiment BNL-E777 [6] both spectrum and branching ratio of the decay K + → π + e + e − were measured. They fit a spectrum with two parameters C and λ defined through…”

Section: 3mentioning

confidence: 99%

“…The solid and long-dashed lines correspond to the theoretical prediction for two sets of values of a + and b + . The comparison is to be applied for M ee > 0.150 GeV (vertical line) as measured by experiment [6].…”

Section: 3mentioning

confidence: 99%

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The decays K→πl⁺l⁻ beyond leading order in the chiral expansion

D’Ambrosio¹,

Ecker²,

Isidori³

et al. 1998

J. High Energy Phys.

164

245

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We present a model-independent analysis of K + → π + ℓ + ℓ − and K S → π 0 ℓ + ℓ − decays, including K → 3π unitarity corrections and a general decomposition of the dispersive amplitude. From the existing data on K + → π + e + e − we predict the ratio R = B(K + → π + µ + µ − )/B(K + → π + e + e − ) to be larger than 0.23, in slight disagreement with the recent measurement R = 0.167 ± 0.036. Consequences for the K ± → π ± e + e − charge asymmetries and for the K L → π 0 e + e − mode are also discussed.

show abstract

Section: 3mentioning

confidence: 99%

“…At O(p 4 ) only negative values of a + are allowed [6]. However, in general there can be a second branch of solutions with positive a + .…”

Section: 3mentioning

confidence: 99%

“…which, together with the results from [6], implies a muon/electron ratio Comparison between different shapes of the K + → π + e + e − form factor for a + > 0 (as in Fig. 3).…”

Section: 3mentioning

confidence: 99%

Section: 3mentioning

confidence: 99%

Section: 3mentioning

confidence: 99%

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The decays K→πl⁺l⁻ beyond leading order in the chiral expansion

D’Ambrosio¹,

Ecker²,

Isidori³

et al. 1998

J. High Energy Phys.

164

245

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Chiral Perturbation Theory

Ecker

1993

Quantitative Particle Physics: Cargèse 1992

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Large-N c Higher Order Weak Chiral Lagrangians for Nonleptonic and Radiative Kaon Decays

Cheng

1994

Contemporary Topics in Medium Energy Physics

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In pure chiral perturbation theory (ChPT) the couplings of higher order Lagrangian terms are running parameters and hence can be determined only empirically from various low-energy hadronic processes. While this scenario works well for strong interactions, it is unsatisfactory for nonleptonic and radiative nonleptonic weak interactions: It is impossible, from the outset, to determine all unknown higher-order chiral couplings by experiment; theory is tested only by certain chiral constraints rather than by its quantitative predictions.Based on a QCD-motivated model for p 4 strong chiral Lagrangian valid in the limit of large N c , one can derive large-N c fourth-order effective chiral Lagrangians for ∆S = 1 nonleptonic weak interactions and radiative weak transitions. Applications to K → πππ, K → πγγ, and K → ππγ are discussed.

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Study of the decayK+→π+
C. Alliegro
¹
,
C. Campagnari
²
,
V. Chaloupka
³

et al.

Cited by 66 publications

References 18 publications

The decays K→πl⁺l⁻ beyond leading order in the chiral expansion

The decays K→πl⁺l⁻ beyond leading order in the chiral expansion

Chiral Perturbation Theory

Large-N c Higher Order Weak Chiral Lagrangians for Nonleptonic and Radiative Kaon Decays

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Study of the decayK+→π+C. Alliegro1, C. Campagnari2, V. Chaloupka3 et al.

Cited by 66 publications

References 18 publications

The decays K→πl+l− beyond leading order in the chiral expansion

The decays K→πl+l− beyond leading order in the chiral expansion

Chiral Perturbation Theory

Large-N c Higher Order Weak Chiral Lagrangians for Nonleptonic and Radiative Kaon Decays

Contact Info

Product

Resources

About

Study of the decayK+→π+
C. Alliegro
¹
,
C. Campagnari
²
,
V. Chaloupka
³

et al.

The decays K→πl⁺l⁻ beyond leading order in the chiral expansion

The decays K→πl⁺l⁻ beyond leading order in the chiral expansion