High statistic measurement of the K−→π0e−ν decay form-factors

Yushchenko, O.; Akimenko, S.A.; Britvich, G. I.; Datsko, K.; Filin, A.; Inyakin, A.V.; Константинов, А. С.; Константинов, В.Ф.; Korolkov, I.; Khmelnikov, V. A.; Leontiev, V. M.; Novikov, V. P.; Obraztsov, V.; Polyakov, V.A.; Romanovsky, V.; Ronjin, V. M.; Shelikhov, V. I.; Smirnov, N.; Tchikilev, O.; Uvarov, V.; Болотов, В.Н.; Лаптев, С. В.; Polyarush, A. Yu.

doi:10.1016/j.physletb.2004.03.069

Cited by 59 publications

(33 citation statements)

References 10 publications

(6 reference statements)

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“…These parameters are customarily fitted to the kinematic distributions of the decay (or Dalitz plot) [63][64][65][66][67][68][69][70], allowing for a calculation the phase-space integral (see next subsection). The Taylor-expansion parametrization introduces a number of parameters which can not be always determined experimentally free of ambiguities and more efficient parametrizations have been proposed [1,11,20,32], incorporating physical constraints to reduce the number of independent parameters.…”

Section: Kinematical Distributionmentioning

confidence: 99%

“…As discussed in section 3.3, this is the case of the WC se S,T , which are not constrained in a linear fit to the (semi)leptonic kaon decay data, and whose quadratic terms represent the leading NP contributions to the K e3 differential distributions. Indeed, this has been used by the ISTRA [64] and NA48 [65] Collaborations to set bounds on those WC. However, none of these fits contain simultaneously the four relevant quantities, namely, the leading SM form-factors parameters λ + , λ + and both WC se S,T , and the correlations are not given either.…”

Section: Quadratic Contributions Of the Wcmentioning

confidence: 99%

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Global effective-field-theory analysis of new-physics effects in (semi)leptonic kaon decays

González–Alonso

Camalich

2016

J. High Energ. Phys.

129

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We analyze the decays K → π ν and P → ν (P = K, π, = e, µ) using a low-energy Effective-Field-Theory approach to parametrize New Physics and study the complementarity with baryon β decays. We then provide a road map for a global analysis of the experimental data, with all the Wilson coefficients simultaneously, and perform a fit leading to numerical bounds for them and for V us . A prominent result of our analysis is a reinterpretation of the well-known V ud −V us diagram as a strong constraint on new physics. Finally, we reinterpret our bounds in terms of the SU(2) L × U(1) Y -invariant operators, provide bounds to the corresponding Wilson coefficients at the TeV scale and compare our results with collider searches at the LHC.

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Section: Kinematical Distributionmentioning

confidence: 99%

Section: Quadratic Contributions Of the Wcmentioning

confidence: 99%

Global effective-field-theory analysis of new-physics effects in (semi)leptonic kaon decays

González–Alonso

Camalich

2016

J. High Energ. Phys.

129

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“…From recent experimental measurements of these coefficients [21,22,23], the current estimate for I is ∼ 0.154 (0.159) for K with an accuracy of around 1% [2,3], where a dominant error comes from the choice of the parametrization form of the q 2 dependence of f + (q 2 ). The choice of the reference scale q 0 = 0 forces us to study the q 2 dependence of the form factor and take the limit of q 2 = 0 as in Sec.…”

Section: Introductionmentioning

confidence: 96%

Vector form factor inKl3semileptonic decay with two flavors of dynamical domain-wall quarks

et al. 2006

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We calculate the vector form factor in K → πlν semileptonic decays at zero momentum transfer f+(0) from numerical simulations of two-flavor QCD on the lattice. Our simulations are carried out on 163 × 32 at a lattice spacing of a ≃ 0.12 fm using a combination of the DBW2 gauge and the domain-wall quark actions, which possesses excellent chiral symmetry even at finite lattice spacings. The size of fifth dimension is set to Ls = 12, which leads to a residual quark mass of a few MeV. Through a set of double ratios of correlation functions, the form factor calculated on the lattice is accurately interpolated to zero momentum transfer, and then is extrapolated to the physical quark mass. We obtain f+(0) = 0.968(9)(6), where the first error is statistical and the second is the systematic error due to the chiral extrapolation. Previous estimates based on a phenomenological model and chiral perturbation theory are consistent with our result. Combining with an average of the decay rate from recent experiments, our estimate of f+(0) leads to the Cabibbo-KobayashiMaskawa (CKM) matrix element |Vus| = 0.2245(27), which is consistent with CKM unitarity. These estimates of f+(0) and |Vus| are subject to systematic uncertainties due to the finite lattice spacing and quenching of strange quarks, though nice consistency in f+(0) with previous lattice calculations suggests that these errors are not large.

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“…The present paper was written in response to that need. Further measurements of |V us | were performed by the IHEP [11], CERN NA48 [12], and KLOE [13] Collaborations, leading to a current world average [14] of |V us | = 0.2257 ± 0.0021. The KLOE Collaboration utilized radiative corrections documented in Ref.…”

Section: Introductionmentioning

confidence: 99%

Radiative corrections in Kℓ30 decays

André

2007

Annals of Physics

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We calculate the long-distance radiative corrections δ e LD and δ µ LD to the K 0 → π − e + ν e and the K 0 → π − µ + ν µ decay rates. This analysis includes contributions to the long-distance radiative corrections from outside the kinematically-allowed three-body Dalitz region and tests the sensitivity of the radiative corrections to the hadronic K-π form factors. A program, KLOR, was written to numerically evaluate the radiative corrections and to generate Monte Carlo events for experimental acceptance studies. The K 0 e3 and the K 0 µ3 long-distance radiative correction parameters are determined to be (1.3 ± 0.3)% and (1.9 ± 0.3)%, respectively. We also present predictions for the fraction of radiative K 0 ℓ3 events satisfying various requirements on final-state photon kinematics.

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High statistic measurement of the K−→π0e−ν decay form-factors

Cited by 59 publications

References 10 publications

Global effective-field-theory analysis of new-physics effects in (semi)leptonic kaon decays

Global effective-field-theory analysis of new-physics effects in (semi)leptonic kaon decays

Vector form factor inKl3semileptonic decay with two flavors of dynamical domain-wall quarks

Radiative corrections in Kℓ30 decays

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