Search for tensor interactions in kaon decays at DAΦNE

Chizhov, M. V.

doi:10.1016/0370-2693(96)00535-7

Cited by 17 publications

(10 citation statements)

References 30 publications

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“…In addition to the QED correction (internal-bremsstrahlung) to the P → ν decay, we have the so-called "structure-dependent" terms which can be extracted separately from experiment [56][57][58]; in the SM they depend on P → γ hadronic form factors and some of them are not chirally suppressed [3,59]. The interest of P 2γ in the context of NP is that their kinematic distributions are sensitive to the tensor operator [60,61], which enter with new form factors [62] (q = p − k): 9) although G P T is kinematically suppressed in the amplitude and can be neglected in first approximation. In fact, the PIBETA collaboration has obtained a stringent constraint on these contributions in π e2γ [57] that, using the calculation of F π T obtained in ref.…”

Section: Jhep12(2016)052mentioning

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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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: Jhep12(2016)052mentioning

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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“…Using this model and the momentum parametrization of Eq. (1), the lowest-order (Born) transition matrix element for the K 0 ℓ3 decay is [26,27,28]…”

Section: Phenomenological Model Of K 0 ℓ3 Decaysmentioning

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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“…[11]. High precision measurements of spectral lines in few-electron atoms can probe the existence of exotic forces between electrons [12], while Direct dark matter searches look for new scalar interactions [13] and semileptonic kaon [14] or tau [15] decays experiments are probing for tensor interactions. The tensor and scalar charges are less precisely known, and a determination within lattice QCD can provide essential input for precision measurements probing the existence of novel scalar and tensor interactions aiding experimental searches.…”

Section: Introductionmentioning

confidence: 99%

Nucleon axial, tensor, and scalar charges and σ -terms in lattice QCD

et al. 2020

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We determine the nucleon axial, scalar and tensor charges within lattice quantum chromodynamics including all contributions from valence and sea quarks. We analyze three gauge ensembles simulated within the twisted mass formulation at approximately physical value of the pion mass. Two of these ensembles are simulated with two dynamical light quarks and lattice spacing a ¼ 0.094 fm and the third with a ¼ 0.08 fm includes in addition the strange and charm quarks in the sea. After comparing the results among these three ensembles, we quote as final values our most accurate analysis using the latter ensemble. For the nucleon isovector axial charge we find 1.286(23) in agreement with the experimental value. We provide the flavor decomposition of the intrinsic spin 1 2 ΔΣ q carried by quarks in the nucleon obtaining for the up, down, strange and charm quarks 1 2 ΔΣ u ¼ 0.431ð8Þ, 1 2 ΔΣ d ¼ −0.212ð8Þ, 1 2 ΔΣ s ¼ −0.023ð4Þ and 1 2 ΔΣ c ¼ −0.005ð2Þ, respectively. The corresponding values of the tensor and scalar charges for each quark flavor are also evaluated providing valuable input for experimental searches for beyond the standard model physics. In addition, we extract the nucleon σ-terms and find for the light quark content σ πN ¼ 41.6ð3.8Þ MeV and for the strange σ s ¼ 45.6ð6.2Þ MeV. The y-parameter that is used in phenomenological studies we find y ¼ 0.078ð7Þ.

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Search for tensor interactions in kaon decays at DAΦNE

Cited by 17 publications

References 30 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

Radiative corrections in Kℓ30 decays

Nucleon axial, tensor, and scalar charges and σ -terms in lattice QCD

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