R. Kessler

activity

19972019

K_{L} \to π^{0} μ^{+} μ^{-}

133 citations · 642 across the 26 of their papers we have counts for

collaborators

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26 papers · 1 filter

hep-ex2019★ 1 cited

A Measurement of the Branching Ratio of $π^{0}$ Dalitz Decay using $K_{L} \to π^{0} π^{0} π^{0}$ Decays

E. Abouzaid, M. Arenton, A. R. Barker +44

We present a measurement of $B (π^{0} \to e^{+} e^{-} γ) / B (π^{0} \to γ γ)$ , the Dalitz branching ratio, using data taken in 1999 by the E832 KTeV experiment at Fermi National…

hep-ex2011★ 10 cited

Search for the Rare Decays KL->pi0pi0mu+mu- and KL->pi0pi0X0->pi0pi0mu+mu-

KTeV Collaboration, E. Abouzaid, M. Arenton +47

The KTeV E799 experiment has conducted a search for the rare decays KL->pi0pi0mu+mu- and KL->pi0pi0X0->pi0pi0mu+mu-, where the X0 is a possible new neutral boson that was reported…

hep-ex2009★ 22 cited

Dispersive analysis of K_{L mu3} and K_{L e3} scalar and vector form factors using KTeV data

KTeV collaboration, E. Abouzaid et al., V. Bernard +3

Using the published KTeV samples of K_L --> pi^{\pm} e^{\mp} nu and K_L --> pi^{\pm} mu^{\mp} nu decays [1], we perform a reanalysis of the scalar and vector form factors based on…

hep-ex2008★ 54 cited

Final Results from the KTeV Experiment on the Decay KL -> pi0 gamma gamma

KTeV Collaboration, E. Abouzaid, M. Arenton +45

We report on a new measurement of the branching ratio B(KL->pi0 gamma gamma)using the KTeV detector. We reconstruct 1982 events with an estimated background of 608, that results in…

hep-ex2008★ 33 cited

Determination of the Parity of the Neutral Pion via the Four-Electron Decay

E. Abouzaid, M. Arenton, A. R. Barker +44

We present a new determination of the parity of the neutral pion via the double Dalitz decay pi^0 -> e+ e- e+ e-. Our sample, which consists of 30511 candidate decays, was collecte…

hep-ex2007★ 73 cited

Search for Lepton Flavor Violating Decays of the Neutral Kaon

KTeV collaboration, A. Abouzaid

The Fermilab KTeV experiment has searched for lepton flavor violating decays of the KL meson in three decay modes. We observe no events in the signal region for any of the modes st…

hep-ex2007★ 2 cited

Search for the Rare Decay K_{L}\toπ^{0}π^{0}γ

KTeV Collaboration, E. Abouzaid, M. Arenton +49

The KTeV E799 experiment has conducted a search for the rare decay $K_{L} \to π^{0} π^{0} γ$ via the topology $K_{L} \to π^{0} π_{D}^{0} γ$ (where $π_{D}^{0} \to γ e^{+} e^{-}$ ). Due to Bose statistics…

hep-ex2007★ 7 cited

Measurements of the Decay $K_{L} \to e^{+} e^{-} γ$

E. Abouzaid et al.

The E799-II (KTeV) experiment at Fermilab has collected 83262 $K_{L} \to e^{+} e^{-} γ$ events above a background of 79 events. We measure a decay width, normalized to the $K_L \to π^0π^0π…

hep-ex2006★ 4 cited

Cascade and anti-Cascade Polarization Measurements at 800 GeV/c

KTeV Collaboration

The polarization of neutral Cascade and anti-Cascade hyperons produced by 800 GeV/c protons on a BeO target at a fixed targeting angle of 4.8 mrad is measured by the KTeV experimen…

hep-ex2006★ 7 cited

Measurement of Direct Emission in the KL->pi+pi-gamma Decay Mode

KTeV Collaboration

In this paper the KTeV collaboration reports the analysis of 112.1*10^3 candidate KL->pi+pi-gamma decays including a background of 671+/-41 events with the objective of determining…

hep-ex2005★ 17 cited

A Measurement of the K0 Charge Radius and a CP Violating Asymmetry Together with a Search for CP Violating E1 Direct Photon Emission in the Rare Decay KL->pi+pi-e+e-

KTeV Collaboration

Using the complete KTeV data set of 5241 candidate KL->pi+pi-e+e- decays (including an estimated background of 204+-14 events), we have measured the coupling gCR=0.163+- 0.014(stat…

hep-ex2002★ 51 cited

A Measurement of the KL Charge Asymmetry

The KTeV Collaboration, A. Alavi-Harati

We present a measurement of the charge asymmetry $δ_{L}$ in the mode $K_{L} \to π^{\pm} e^{\mp} ν$ based on 298 million analyzed decays. We measure a value of $δ_L = (3322 \pm 58(stat) \…

hep-ex2001★ 9 cited

Radiative Decay Width Measurements of Neutral Kaon Excitations Using the Primakoff Effect

KTeV Collaboration, A. Alavi-Harati

We produce a sample consisting of 147 candidate events, with minimal backgrounds, of the mixed axial vector pair K1(1270)-K1(1400) by exciting Kl's in the Coulomb field of lead and…

hep-ex2001★ 7 cited

Branching Ratio Measurement of the decay K_L -> e+ e- mu+ mu-

Alavi-Harati

We have collected a 43 event sample of the decay $K_{L} \to e^{+} e^{-} μ^{+} μ^{-}$ with negligible backgrounds and measured its branching ratio to be $(2.62 \pm 0.40 \pm 0.17) \times 1 0^{- 9}$ .…

hep-ex2001★ 11 cited

A New Measurement of the Radiative Ke3 Branching Ratio and Photon Spectrum

Douglas R. Bergman

We present a new measurement of the branching ratio of the decay K_L -> pi e nu gamma (Ke3g) with respect to K_L -> pi e nu (Ke3), and the first study of the photon energy spectrum…

hep-ex2001★ 33 cited

First Measurement of Form Factors of the Decay Xi0->Sigma+ e- anti-nu/e

KTeV collaboration

We present the first measurement of the form factor ratios g1/f1 (direct axial-vector to vector), g2/f1 (second class current) and f2/f1 (weak magnetism) for the decay Xi0 -> Sigma…

hep-ex2000★ 14 cited

A Measurement of the Branching Ratio and Asymmetry of the Decay Cascade^0-->Sigma^0/gamma

A. Alavi-Harti

We have studied the rare weak radiative hyperon decay Cascade0-->Sigma0/gamma in the KTeV experiment at Fermilab. We have identified 4045 signal events over a background of 804 eve…

hep-ex2000★ 8 cited

First Observation of the decay KL -> pi0 e e gamma

The KTeV Collaboration

We report on the first observation of the decay KL -> pi0 ee gamma by the KTeV E799 experiment at Fermilab. Based upon a sample of 48 events with an estimated background of 3.6 +/-…

hep-ex2000★ 8 cited

A Measurement of the Branching Ratio of $K_{L} \to e^{+} e^{-} γ γ$

The KTeV Collaboration, A. Alavi-Harati

We report on a study of the decay $K_{L} \to e^{+} e^{-} γ γ$ carried out as a part of the KTeV/E799 experiment at Fermilab. The 1997 data yielded a sample of 1543 events, including an expe…

hep-ex2000★ 17 cited

Study of the KL to PI+PI-GAMMA Direct Emission Vertex

J. Belz, the KTeV Collaboration

We have perfomed studies of the KL to PI+PI-GAMMA Direct Emission (DE) and Inner Bremsstrahlung (IB) vertices, based on data collected by KTeV during the 1996 Fermilab fixed target…

hep-ex2000★ 133 cited

Search for the Decay $K_{L} \to π^{0} μ^{+} μ^{-}$

A. Alavi-Harati

We report on a search for the decay \klpimumu carried out as a part of the KTeV experiment at Fermilab. This decay is expected to have a significant $C P$ violating contribution and…

hep-ex2000★ 7 cited

Observation of the Decay $K_{L} \to μ^{+} μ^{-} γ γ$

A. Alavi-Harati

We have observed the decay $K_{L} \to μ^{+} μ^{-} γ γ$ at the KTeV experiment at Fermilab. This decay presents a formidable background to the search for new physics in $K_{L} \to π^{0} μ^{+} μ^{-}$ . Th…

hep-ex1999★ 29 cited

Search for the Weak Decay of a Lightly Bound H Dibaryon

The KTeV Collaboration

We present results of a search for a neutral, six-quark, dibaryon state called the \h, a state predicted to exist in several theoretical models. Observation of such a state would s…

hep-ex1999★ 16 cited

Measurement of the branching ratio of pi^0 -> e^+e^- using K_L -> 3 pi^0 decays in flight

KTeV Collaboration

The branching ratio of the rare decay pi^0 -> e^+e^- has been measured in E799-II, a rare kaon decay experiment using the KTeV detector at Fermilab. The pi^0's were produced in ful…

A Measurement of the Branching Ratio of π0 Dalitz Decay using KL​→π0π0π0 Decays

Search for the Rare Decays KL->pi0pi0mu+mu- and KL->pi0pi0X0->pi0pi0mu+mu-

Dispersive analysis of K_{L mu3} and K_{L e3} scalar and vector form factors using KTeV data

Final Results from the KTeV Experiment on the Decay KL -> pi0 gamma gamma

Determination of the Parity of the Neutral Pion via the Four-Electron Decay

Search for Lepton Flavor Violating Decays of the Neutral Kaon

Search for the Rare Decay K_{L}\toπ^{0}π^{0}γ

Measurements of the Decay KL​→e+e−γ

Cascade and anti-Cascade Polarization Measurements at 800 GeV/c

Measurement of Direct Emission in the KL->pi+pi-gamma Decay Mode

A Measurement of the K0 Charge Radius and a CP Violating Asymmetry Together with a Search for CP Violating E1 Direct Photon Emission in the Rare Decay KL->pi+pi-e+e-

A Measurement of the KL Charge Asymmetry

Radiative Decay Width Measurements of Neutral Kaon Excitations Using the Primakoff Effect

Branching Ratio Measurement of the decay K_L -> e+ e- mu+ mu-

A New Measurement of the Radiative Ke3 Branching Ratio and Photon Spectrum

First Measurement of Form Factors of the Decay Xi0->Sigma+ e- anti-nu/e

A Measurement of the Branching Ratio and Asymmetry of the Decay Cascade^0-->Sigma^0/gamma

First Observation of the decay KL -> pi0 e e gamma

A Measurement of the Branching Ratio of KL​→e+e−γγ

Study of the KL to PI+PI-GAMMA Direct Emission Vertex

Search for the Decay KL​→π0μ+μ−

Observation of the Decay KL​→μ+μ−γγ

Search for the Weak Decay of a Lightly Bound H Dibaryon

Measurement of the branching ratio of pi^0 -> e^+e^- using K_L -> 3 pi^0 decays in flight

A Measurement of the Branching Ratio of $π^{0}$ Dalitz Decay using $K_{L} \to π^{0} π^{0} π^{0}$ Decays

Measurements of the Decay $K_{L} \to e^{+} e^{-} γ$

A Measurement of the Branching Ratio of $K_{L} \to e^{+} e^{-} γ γ$

Search for the Decay $K_{L} \to π^{0} μ^{+} μ^{-}$

Observation of the Decay $K_{L} \to μ^{+} μ^{-} γ γ$