133 citations · 640 across the 21 of their papers we have counts for
21 papers · 1 filter
A Determination of the CKM Parameter |Vus|
KTeV Collaboration, T. Alexopoulos
We present a determination of the CKM parameter |Vus| based on new measurements of the six largest KL branching fractions and semileptonic form factors by the KTeV (E832) experimen…
Search for the K(L) --> PI0 PI0 E+ E- Decay in the KTeV Experiment
KTeV Collaboration, A. Alavi-Harati
The recent discovery of a large CP violating asymmetry in K(L) --> PI+ PI- E+ E- mode has prompted us to seach for the associated K(L) --> PI0 PI0 E+ E- decay mode in the KTeV-E799…
A Measurement of the KL Charge Asymmetry
The KTeV Collaboration, A. Alavi-Harati
We present a measurement of the charge asymmetry in the mode based on 298 million analyzed decays. We measure a value of $δ_L = (3322 \pm 58(stat) \…
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…
Branching Ratio Measurement of the decay K_L -> e+ e- mu+ mu-
Alavi-Harati
We have collected a 43 event sample of the decay with negligible backgrounds and measured its branching ratio to be .…
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…
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…
Measurements of the rare decay K_{L} -> e^{+} e^{-} e^{+} e^{-}
The KTeV Collaboration, A. Alavi-Harati
We observe 441 K_{L} -> e^{+} e^{-} e^{+} e^{-} candidate events with a background of 4.2 events and measure B(K_{L} -> e^{+} e^{-} e^{+} e^{-}) = (3.72 \pm 0.18(stat) \pm 0.23(sys…
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…
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 +/-…
A Measurement of the Branching Ratio of
The KTeV Collaboration, A. Alavi-Harati
We report on a study of the decay carried out as a part of the KTeV/E799 experiment at Fermilab. The 1997 data yielded a sample of 1543 events, including an expe…
Search for the Decay Kl -> pi0 e+ e-
A. Alavi-Harati
We report on a search for the decay Kl -> pi0 e+ e- carried out by the KTeV/E799 experiment at Fermilab. This decay is expected to have a significant CP violating contribution and…
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…
Search for the Decay
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 violating contribution and…
Observation of the Decay
A. Alavi-Harati
We have observed the decay at the KTeV experiment at Fermilab. This decay presents a formidable background to the search for new physics in . Th…
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…
Observation of CP Violation in K(L)->pi+pi-e+e- Decays
KTeV Collaboration
We report the first observation of a manifestly CP violating effect in the K(L)->pi+pi-e+e- decay mode. A large asymmetry was observed in the distribution of these decays in the CP…
Light Gluino Search for Decays Containing pi+pi- or pi0 from a Neutral Hadron Beam at Fermilab
A. Alavi-Harati et al, KTeV Collaboration
We report on two null searches, one for the spontaneous appearance of pairs, another for a single , consistent with the decay of a long-lived neutral particle into ha…
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…
Measurement of the Decay KL -> Pi0 Gamma Gamma
A. Alavi-Harati et. al, the KTeV Collaboration
We report on a new measurement of the decay KL -> pi0 gamma gamma by the KTeV experiment at Fermilab. We determine the KL -> pi0 gamma gamma branching ratio to be (1.68 +/- 0.07 +/…
Search for Light Gluinos via the Spontaneous Appearance of pi+pi- Pairs with an 800 GeV/c Proton Beam at Fermilab
J. Adams
We searched for the appearance of pi+pi- pairs with invariant mass greater than 648 MeV in a neutral beam. Such an observation could signify the decay of a long-lived light neutral…