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4.5k citations

Showing 2003 · hep-exShow all

19 papers · 2 filters

hep-ex2003★ 53 cited

Precise Measurement of the Pion Axial Form Factor in the Pi+ -> e+ nu gamma Decay

E. Frlez, D. Pocanic, V. A. Baranov +23

We have studied radiative pion decays Pi+ -> e+ nu gamma in three broad kinematic regions using the PIBETA detector and a stopped pion beam. Based on Dalitz distributions of 42,209…

hep-ex2003★ 8 cited

Search for Colour Singlet and Colour Reconnection Effects in Hadronic Z Decays at LEP

L3 Collaboration

A search is performed in symmetric 3-jet hadronic Z decay events for evidence of colour singlet production or colour reconnection effects. Asymmetries in the angular separation of…

hep-ex2003★ 43 cited

Design, Commissioning and Performance of the PIBETA Detector at PSI

E. Frlez, D. Pocanic, K. A. Assamagan +41

We describe the design, construction and performance of the PIBETA detector built for the precise measurement of the branching ratio of pion beta decay, pi+ -> pi0 e+ nu, at the Pa…

hep-ex2003★ 128 cited

Precise Measurement of the Pi+ -> Pi0 e+ nu Branching Ratio

D. Pocanic, E. Frlez, V. A. Baranov +25

Using a large acceptance calorimeter and a stopped pion beam we have made a precise measurement of the rare Pi+ -> Pi0 e+ Nu,(pi_beta) decay branching ratio. We have evaluated the…

hep-ex2003★ 23 cited

Muon Pair Production in ep Collisions at HERA

H1 Collaboration

Cross sections for the production of two isolated muons up to high di-muon masses are measured in ep collisions at HERA with the H1 detector in a data sample corresponding to an in…

hep-ex2003★ 123 cited

Search for Scalar Leptons and Scalar Quarks at LEP

L3 Collaboration

Scalar partners of quarks and leptons, predicted in supersymmetric models, are searched for in e^+e^- collisions at centre-of-mass energies between 192GeV and 209GeV at LEP. No evi…

hep-ex2003★ 64 cited

Search for Doubly-Charged Higgs Bosons at LEP

L3 Collaboration

Doubly-charged Higgs bosons are searched for in e^+e^- collision data collected with the L3 detector at LEP at centre-of-mass energies up to 209 GeV. Final states with four leptons…

hep-ex2003★ 19 cited

Search for a Higgs Boson Decaying to Weak Boson Pairs at LEP

L3 Collaboration

A Higgs particle produced in association with a Z boson and decaying into weak boson pairs is searched for in 336.4 1/pb of data collected by the L3 experiment at LEP at centre-of-…

hep-ex2003★ 12 cited

Proton-Antiproton Pair Production in Two-Photon Collisions at LEP

L3 collaboration

The reaction e^+e^- -> e^+e^- proton antiproton is studied with the L3 detector at LEP. The analysis is based on data collected at e^+e^- center-of-mass energies from 183 GeV to 20…

hep-ex2003★ 35 cited

Search for Excited Leptons at LEP

L3 Collaboration

A search for charged and neutral excited leptons is performed in 217 pb^-1 of e+e- collision data collected with the L3 detector at LEP at centre-of-mass energies from 202 GeV up t…

hep-ex2003★ 62 cited

Diffractive Photoproduction of J/psi Mesons with Large Momentum Transfer at HERA

H1 Collaboration

The diffractive photoproduction of J/psi mesons is measured with the H1 detector at the ep collider HERA using an integrated luminosity of 78 pb^-1. The differential cross section…

hep-ex2003★ 28 cited

Measurement of Exclusive rho^0 rho^0 Production in Two-Photon Collisions at High Q^2 at LEP

L3 Collaboration

Exclusive rho rho production in two-photon collisions involving a single highly virtual photon is studied with data collected at LEP at centre-of-mass energies 89GeV < \sqrt{s} < 2…

hep-ex2003★ 81 cited

New, high statistics measurement of the K+ -> pi0 e+ nu (Ke3) branching ratio

A. Sher, R. Appel, G. S. Atoyan +25

E865 at the Brookhaven National Laboratory AGS collected about 70,000 K+(e3) events with the purpose of measuring the relative K+(e3) branching ratio. The pi0 in all the decays was…

hep-ex2003★ 20 cited

Search for Colour Reconnection Effects in e+e- -> W+W- -> hadrons through Particle-Flow Studies at LEP

L3 Collaboration

A search for colour reconnection effects in hadronic decays of W pairs is performed with the L3 detector at centre-of-mass energies between 189 and 209 GeV. The analysis is based o…

hep-ex2003★ 2 cited

Study of the e+e- -> Ze+e- process at LEP

L3 Collaboration

The cross section of the process e+e- -> Ze+e is measured with 0.7fb^-1 of data collected with the L3 detector at LEP. Decays of the Z boson into quarks and muons are considered at…

hep-ex2003★ 120 cited

High statistics measurement of Ke4 decay properties

S. Pislak, R. Appel, G. S. Atoyan +25

We report experimental details and results of a new measurement of the decay K+ -> pi+pi-e+nue (Ke4}. A sample of more than 400,000 Ke4 events with low background has been collecte…

hep-ex2003★ 44 cited

Isolated electrons and muons in events with missing transverse momentum at HERA

H1 Collaboration

A search for events with a high energy isolated electron or muon and missing transverse momentum has been performed at the electron-proton collider HERA using an integrated luminos…

hep-ex2003★ 20 cited

Measurement of W Polarisation at LEP

L3 Collaboration

The three different helicity states of W bosons produced in the reaction e+ e- -> W+ W- -> l nu q q~ at LEP are studied using leptonic and hadronic W decays. Data at centre-of-mass…

hep-ex2003★ 15 cited

Inclusive Charged Hadron Production in Two-Photon Collisions at LEP

L3 Collaboration

Inclusive charged hadron production, e+e- -> e+e- h+- X, is studied using 414 pb-1 of data collected at LEP with the L3 detector at centre-of-mass energies between 189 and 202 GeV.…