Measurements of semileptonic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>K</mml:mi><mml:mi>L</mml:mi></mml:msub></mml:math>decay form factors

Alexopoulos, T.; Arenton, M. W.; Barbosa, R. F.; Barker, A. R.; Bellantoni, L.; Bellavance, A.; Blucher, E.; Bock, G. J.; Cheu, E.; Childress, S.; Coleman, R.; Corcoran, M.; Cox, B.; Erwin, A. R.; Ford, R.; Glazov, A.; Golossanov, A.; Graham, J.; Hamm, J.; Hanagaki, K.; Hsiung, Y.; Huang, H.-C.; Jejer, V.; Jensen, D. A.; Keßler, R.; Kobrak, H. G. E.; Kotera, Katsushige; LaDue, J.; Ledovskoy, A.; McBride, P.; Monnier, E.; Nelson, K. S.; Nguyen, H. H.; Niclasen, R.; Prasad, V.; Qi, X. R.; Ramberg, E.; Ray, R. E.; Ronquest, M.; Santos, Edivaldo Moura; Shanahan, P.; Shields, Joseph C.; Slater, W.; Smith, D.; Solomey, N.; Swallow, E. C.; Tesarek, R. J.; Toale, P. A.; Tschirhart, R.; Wah, Y. W.; Wang, James; White, H. B.; Whitmore, J.; Wilking, M. J.; Winstein, B.; Winston, R.; Worcester, E.; Yamanaka, T.; Zimmerman, E. D.

doi:10.1103/physrevd.70.092007

Cited by 63 publications

(15 citation statements)

References 29 publications

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“…Our resulting world-average values for Λ + and ln C are listed in Table 11. The value ln C = 0.2004 (91), when used with f K /f π = 1.193 (6), gives f + (0) = 0.974 (12). More generally, the experimental data on ln C alone give (f K /f π )/f + (0) = 1.225 (14).…”

Section: The K µ3 Scalar Form Factor and Tests Of Chiral Perturbationmentioning

confidence: 99%

“…The KTeV experiment has measured five ratios of the partial widths for the six main K L decays from independent samples of 10 5 -10 6 events collected with a single trigger [91]. The KTeV results for the ratios BR(K µ3 )/BR(K e3 ), BR(π + π − π 0 )/BR(K e3 ), BR(3π 0 )/BR(K e3 ), BR(π + π − )/BR(K e3 ), and BR(2π 0 )/BR(3π 0 ), with total uncertainties ranging from 0.4 to 1.1%, are listed in Table 2.…”

Section: Dominant K L Branching Ratios and τ Klmentioning

confidence: 99%

“…3.5 Measurements of K ℓ3 form factor parameters 3.5.1 K e3 form factor parameters KLOE [128], KTeV [129], NA48 [130], and ISTRA+ [131] have all performed recent measurements of the quadratic parameters λ ′ + and λ ′′ + of the vector form factor for K e3 decays (see Eq. (28)).…”

Section: Dominant K ± Branching Ratios and τ K ±mentioning

confidence: 99%

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An evaluation of |V us | and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays

et al. 2010

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Abstract. We present a global analysis of leptonic and semileptonic kaon decay data, including all recent results published by the BNL-E865, KLOE, KTeV, ISTRA+ and NA48 experiments. This analysis, in conjunction with precise lattice calculations of the hadronic matrix elements now available, leads to a very precise determination of |Vus| and allows us to perform several stringent tests of the Standard Model.

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Section: The K µ3 Scalar Form Factor and Tests Of Chiral Perturbationmentioning

confidence: 99%

Section: Dominant K L Branching Ratios and τ Klmentioning

confidence: 99%

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An evaluation of |V us | and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays

et al. 2010

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“…For τ decays the HFAG group [91] obtains R W = (g e /g µ ) 2 = 0.9964 ± 0.0028, where g e and g µ are the couplings of the W boson to e and µ, respectively. The KTeV measurement of K → π ± ∓ ν decays results in R W = 1.0031 ± 0.0048 [92]. The measurement of K ± → ± ν decays by NA62 corresponds to an equivalent of R W = 1.0044 ± 0.0040 [93].…”

Section: Test Of Electron-muon Universalitymentioning

confidence: 99%

Precision measurement and interpretation of inclusive $$W^+$$ W + , $$W^-$$ W -

et al. 2017

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High-precision measurements by the ATLAS Collaboration are presented of inclusive , and () Drell–Yan production cross sections at the LHC. The data were collected in proton–proton collisions at with an integrated luminosity of . Differential and cross sections are measured in a lepton pseudorapidity range . Differential cross sections are measured as a function of the absolute dilepton rapidity, for , for three intervals of dilepton mass, , extending from 46 to . The integrated and differential electron- and muon-channel cross sections are combined and compared to theoretical predictions using recent sets of parton distribution functions. The data, together with the final inclusive scattering cross-section data from H1 and ZEUS, are interpreted in a next-to-next-to-leading-order QCD analysis, and a new set of parton distribution functions, ATLAS-epWZ16, is obtained. The ratio of strange-to-light sea-quark densities in the proton is determined more accurately than in previous determinations based on collider data only, and is established to be close to unity in the sensitivity range of the data. A new measurement of the CKM matrix element is also provided.

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“…The last column summarizes also various theoretical predictions for a [61] and a τ decay analysis [19]. The experimental numbers from K ℓ3 data (first line) for λ ′ + and λ ′′ + are from left to right from KTeV [79] , KLOE [8,80], NA48 [7,81] and ISTRA+ [82,83]. The theoretical numbers (second line) are from earlier works on τ → Kπν τ without constraints from K ℓ3 [16]- [18] and with constraints [19].…”

Section: Jhep06(2014)082mentioning

confidence: 99%

First determination of f +(0)|V us | from a combined analysis of τ → Kπν τ decay and πK scattering with constraints from K ℓ3 decays

Bernard

2014

J. High Energ. Phys.

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Abstract:We perform a combined analysis of τ → Kπν τ decay and πK scattering with constraints from K ℓ3 data using a N/D approach that fulfills requirements from unitarity and analyticity. We obtain a good fit of the I = 1/2 πK amplitude in the P wave using the LASS data above the elastic region while in this region data are generated via Monte Carlo using the FOCUS results based on D ℓ4 decay. The spectrum and branching ratio of τ → Kπν τ constrained by K ℓ3 decays are also well reproduced leading to f + (0)|V us | = 0.2163 ± 0.0014. Furthermore, we obtain the slope of the vector form factor λ + = (25.56 ± 0.40) × 10 −3 while the value of the scalar form factor at the Callan-Treiman point is ln C = 0.2062 ± 0.0089. Given the experimental precision our results are compatible with the Standard Model.

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Measurements of semileptonicKLdecay form factors

Cited by 63 publications

References 29 publications

An evaluation of |V us | and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays

An evaluation of |V us | and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays

Precision measurement and interpretation of inclusive $$W^+$$ W + , $$W^-$$ W -

First determination of f +(0)|V us | from a combined analysis of τ → Kπν τ decay and πK scattering with constraints from K ℓ3 decays

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