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72 papers · 2 filters
A Study of the Decay D0->K+pi-
FOCUS Collaboration, Jonathan M. Link
Using a large sample of photoproduced charm mesons from the FOCUS experiment at Fermilab (FNAL-E831), we observe the decay with a signal yield of events…
Observation of Tau Neutrino Interactions
DONUT Collaboration
The DONUT experiment has analyzed 203 neutrino interactions recorded in nuclear emulsion targets. A decay search has found evidence of four tau neutrino interactions with an estima…
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 Measurement of the Ratio B(t-->Wb)/B(t-->Wq) and Associated Limit on the CKM Element Vtb
CDF Collaboration
We present the first measurement of the ratio of branching fraction R= B(t-->wb)/B(t-->Wq) from ppbar collisions at sqrt(s)=1.8 TeV. The data set corresponds to 109 pb-1 of data re…
Measurement of the Two-Jet Differential Cross Section in proton-antiproton Collisions at sqrt{s} = 1800 GeV
CDF Collaboration
A measurement is presented of the two-jet differential cross section, d^3σ/dE_T dη_1 dη_2, at center of mass energy sqrt{s} = 1800 GeV in proton-antiproton collisions. The results…
Recent Results on Charm and Hyperon Physics from SELEX
SELEX Collaboration, J. Engelfried
The SELEX experiment (Fermilab E781) is a 3-stage magnetic spectrometer for the study of charm hadroproduction at large x_F using 600GeV/c Sigma-, pi-, and p beams. New precise mea…
Review of Heavy-Quark Production at Fixed-Target Experiments
Jeffrey A. Appel
An increasingly large amount of quality fixed-target data on heavy-quark production at fixed-target energies is appearing. This data can provide information across a range of physi…
A First Measurement of Low x Low Q^2 Structure Functions in Neutrino Scattering
NuTeV Collaboration, B. T. Fleming
A new structure function analysis of CCFR deep inelastic nu-N and nubar-N scattering data is presented for previously unexplored kinematic regions down to Bjorken x=0.0045 and Q^2=…
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 +/-…
Beam Test of BTeV Pixel Detectors
J. C. Wang, J. A. Appel, M. Artuso +20
The silicon pixel vertex detector is one of the key elements of the BTeV spectrometer. Detector prototypes were tested in a beam at Fermilab. We report here on the measured spatial…
A Quasi-Model-Independent Search for New High p_T Physics at DZero
DZero Collaboration
We apply a quasi-model-independent strategy ("Sleuth") to search for new high p_T physics in approximately 100 pb^-1 of ppbar collisions at sqrt(s) = 1.8 TeV collected by the DZero…
A Quasi-Model-Independent Search for New Physics at Large Transverse Momentum
DZero Collaboration
We apply a quasi-model-independent strategy ("Sleuth") to search for new high p_T physics in approximately 100 pb^-1 of ppbar collisions at sqrt(s) = 1.8 TeV collected by the DZero…
The Experiment Road to the Heavier Quarks and Other Heavy Objects
Jeffrey A. Appel
After a brief history of heavy quarks, I will discuss charm, bottom, and top quarks in turn. For each one, I discuss its first observation, and then what we have learned about prod…
Charm Hadroproduction at Fermilab E769
D. J. Summers
E769 has just recorded on tape the interactions of 500 million pions, kaons, and protons. A Cerenkov counter and a TRD were used to tag beam particle types in both positive and neg…
Observation of Polarization in Bottomonium Production at sqrt(s)=38.8 GeV
C. N. Brown, T. C. Awes, M. E. Beddo +34
We present a measurement of the polarization observed for bottomonium states produced in p-Cu collisions at sqrt(s)=38.8 GeV. The angular distribution of the decay dimuons of the U…
Search for Rare and Forbidden Charm Meson Decays D0--> V l+ l- and h h l l
Fermilab E791 Collaboration, E. M. Aitala
We report the results of a search for flavor-changing neutral current, lepton-flavor, and lepton-number violating decays of the 3 and 4-body decay modes of D0 (and its antiparticle…
Inclusive Jet Production in pbar p Collisions
D0 Collaboration, B. Abbott
We report a new measurement of the pseudorapidity (eta) and transverse-energy (Et) dependence of the inclusive jet production cross section in pbar b collisions at sqrt(s) = 1.8 Te…
Search for the Supersymmetric Partner of the Top-Quark in Collisions at
CDF Collaboration
We report on a search for the supersymmetric partner of the top quark (stop) produced in events using of collisions at $\sqrt{s} = 1.8 {…
Search for Neutral Supersymmetric Higgs Bosons in Collisions at TeV
CDF collaboration
We present the results of a search for neutral Higgs bosons produced in association with quarks in final states with pb$…
Energy loss of fast quarks in nuclei
M. B. Johnson, B. Z. Kopeliovich, I. K. Potashnikova +22
We report an analysis of the nuclear dependence of the yield of Drell-Yan dimuons from the 800 GeV/c proton bombardment of , C, Ca, Fe, and W targets. Employing a new formulat…
Direct measurement of the pion valence quark momentum distribution, the pion light-cone wave function squared
E791 Collaboration, E. M. Aitala
We present the first direct measurements of the pion valence quark momentum distribution which is related to the square of the pion light-cone wave function. The measurements were…
Light meson and baryon spectroscopy from charm decays in Fermilab E791
M. V. Purohit
We present results from Fermilab experiment E791. We extracted the fractions of resonant components in the decays, and found a significant polarization of the…
Fermilab E791
L. M. Cremaldi
Fermilab E791, a very high statistics charm particle experiment, recently completed its data taking at Fermilab's Tagged Photon Laboratory. Over 20 billion events were recorded thr…
Precision measurements of the Lambda_c+ and D0 lifetimes
The SELEX collaboration, A. Kushnirenko
We report new precision measurements of the lifetimes of the Lambda_c+ and D0 from SELEX, the charm hadro-production experiment at Fermilab. Based upon 1630 Lambda_c+ and 10210 D0…