A large acceptance, high-resolution detector for rare K+-decay experiments

Appel, R.; Atoyan, G. S.; Bassalleck, B.; Battiste, E.; Bergman, D. R.; Bösiger, K.; Brown, D. N.; Castillo, V.; Cheung, N.W.; Dhawan, S. K.; Do, Hyo-Sang; Egger, J.; Eilerts, S.; Felder, C.; Fischer, H.; Gach, H. Michael; Giles, R. T.; Gninenko, S.; Herold, W.; Hotmer, J.E.; Issakov, Vadim; Karavichev, O.; Kaspar, H.; Kraus, D.; Lazarus, D. M.; Lebedev, V.; Leipuner, L. B.; Lichard, P.; Lowe, J.; Lozano, J.; Lu, Tiancheng; Ma, Hui; Magurno, B.A.; Majid, Walid A.; Menzel, W.; Miller, Carolyn; Nickelson, M.; Ober, I.; Pile, P.; Pislak, S.; Poblaguev, A.; Pomianowski, P.; Postoev, V. E.; Proskurjakov, A. L.; Řehák, P.; Robmann, P.; Schmid, B.; Sher, A.; Ev, Shun'ko; Steiner, S.; Stever, T.L.; Stotzer, R.; Suhov, V.V.; Thompson, J.; Truöl, P.; Valine, C.M; Weyer, H. J.; Wolfe, D.; Zeller, M.

doi:10.1016/s0168-9002(01)00906-8

Cited by 15 publications

(6 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Second, the five parameters that determine the resonance properties, i.e. the complex pole positions of the K * (892) and 3 …”

Section: Fit To τ → Kπν τmentioning

confidence: 99%

“…Historically, the main source of experimental information on Kπ form factors have been K l 3 decays. Recently, five experiments have collected data on semileptonic and leptonic K decays: BNL-E865 [3], KLOE [4], KTeV [5], ISTRA+ [6], and NA48 [7]. The results from these analyses yielded an important amount of information on form factors as well as stringent tests of QCD at low-energies and of the Standard Model itself (for recent reviews on theoretical and experimental aspects of kaon physics we refer to Refs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

K π vector form factor constrained by τ → Kπντ and K l3 decays

Boito

Escribano

Jamin

2010

J. High Energ. Phys.

View full text Add to dashboard Cite

Dispersive representations of the Kπ vector and scalar form factors are used to fit the spectrum of τ → Kπν τ obtained by the Belle collaboration incorporating constraints from results for K l 3 decays. The slope and curvature of the vector form factor are obtained directly from the data through the use of a three-times-subtracted dispersion relation. We find λ ′ + = (25.49 ± 0.31) × 10 −3 and λ ′′ + = (12.22 ± 0.14) × 10 −4 . From the pole position on the second Riemann sheet the mass and width of the K * (892) ± are found to be m K * (892) ± = 892.0 ± 0.5 MeV and Γ K * (892) ± = 46.5 ± 1.1 MeV. The phase-space integrals needed for K l 3 decays are calculated as well. Furthermore, the Kπ isospin-1/2 P -wave threshold parameters are derived from the phase of the vector form factor. For the scattering length and the effective range we find respectively a

show abstract

“…Second, the five parameters that determine the resonance properties, i.e. the complex pole positions of the K * (892) and 3 …”

Section: Fit To τ → Kπν τmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

K π vector form factor constrained by τ → Kπντ and K l3 decays

Boito

Escribano

Jamin

2010

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…This paper presents results from E865 for the first observation of the decay The experimental apparatus for Brookhaven E865 is shown in Fig. 2 and has been described in detail elsewhere [7]. A 6 GeV/c unseparated beam from the AGS was incident on a 5-m long evacuated decay volume.…”

mentioning

confidence: 99%

First observation of the decayK+→e+νeμ+μ−

Ma¹,

Appel²,

Atoyan³

et al. 2006

Phys. Rev. D

Self Cite

164

306

View full text Add to dashboard Cite

show abstract

“…The experimental apparatus was constructed to search for the decay K + → π + µ + e − in flight from an unseparated 6 GeV/c K + beam, and has been described elsewhere [11]. The K e2ee and K µ2ee data were obtained in a 1996 run simultaneously with that for a measurement of K + → π + e + e − (K πee ) [12].…”

mentioning

confidence: 99%

“…The scintillation hodoscope embedded in the muon stack behind 40 cm of iron [11] was used for additional µ/π separation in K µ2ee analysis. The µ/π detection efficiencies in the hodoscope were studied using K π2 and K µ3 events where the π 0 D was fully reconstructed, i.e., the resulting photon was observed and included in the kinematic reconstruction.…”

mentioning

confidence: 99%

Experimental Study of the Radiative DecaysK+→μ+νe+e−andK+
Aa¹,
Appel²,
Gs³
et al. 2002
Phys. Rev. Lett.
Self Cite
44
4
41
1
View full text Add to dashboard Cite

Chiral Perturbation Theory (ChPT) [1] has been a successful approach to describing the decays of pseudoscalar mesons. In the ChPT program radiative kaon decays can serve both as an important test and a source of input parameters for the theory. While the decay modes K + → e + νγ (K e2γ ) and µ + νγ (K µ2γ ) have allowed some study of the form factors involved [2,3,4], the decays) allow a more detailed investigation into the structure of these decays. We report here on such an investigation from Experiment 865 at the Brookhaven National Laboratory AGS with a 100-fold increase in the number of events in the former mode and 150-fold increase in the latter [5].The K e2ee and K µ2ee decays are assumed to proceed via exchange of a W + -boson (l + ν) and photon (e + e − ). The decay amplitude [6,7] includes inner bremsstrahlung (IB) corresponding to the tree diagrams in Fig. 1a,b, and structure dependent (SD) radiation (Fig. 1c) parameterized by vector F V , axial F A and R form factors. K e2γ and K µ2γ experiments were actually sensitive only to |F V + F A |. R, which contributes only to decays with an e + e − -pair, has not yet been measured. Inner bremsstrahlung is unambiguously predicted by the K → lν amplitude and is proportional to the kaon decay constant F K = 160 MeV. We included the kaon electromagnetic form factor in Fig. 1b (amplitude A 4 of

show abstract

A large acceptance, high-resolution detector for rare K+-decay experiments

Cited by 15 publications

References 37 publications

K π vector form factor constrained by τ → Kπντ and K l3 decays

K π vector form factor constrained by τ → Kπντ and K l3 decays

First observation of the decayK+→e+νeμ+μ−

Experimental Study of the Radiative DecaysK+→μ+νe+e−andK+
Aa¹,
Appel²,
Gs³
et al. 2002
Phys. Rev. Lett.
Self Cite
44
4
41
1
View full text Add to dashboard Cite

Contact Info

Product

Resources

About

A large acceptance, high-resolution detector for rare K+-decay experiments

Cited by 15 publications

References 37 publications

K π vector form factor constrained by τ → Kπντ and K l3 decays

K π vector form factor constrained by τ → Kπντ and K l3 decays

First observation of the decayK+→e+νeμ+μ−

Experimental Study of the Radiative DecaysK+→μ+νe+e−andK+Aa1, Appel2, Gs3 et al. 2002Phys. Rev. Lett.Self Cite444411View full textAdd to dashboardCite

Contact Info

Product

Resources

About

Experimental Study of the Radiative DecaysK+→μ+νe+e−andK+
Aa¹,
Appel²,
Gs³
et al. 2002
Phys. Rev. Lett.
Self Cite
44
4
41
1
View full text Add to dashboard Cite