CERN Accelerating science

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1.
Measurement of Branching Fractions of τ Hadronic Decays / L3 Collaboration
Using data collected with the L3 detector at LEP at the Z peak, the branching fractions of the τ lepton into the hadronic final states, hnπ0ν(n=0,1,2,>=3) and hh+hnπ0ν where h± denotes a charged hadron, are measured to be .....
CERN-EP-2003-019 ; CERN-L3-270.
- 2003. - 17 p.
Fulltext - Fulltext
2.
Inclusive D± production in two-photon collisions at LEP / L3 Collaboration
Inclusive D*/sup +or-/ production in two-photon collisions is studied with the L3 detector at LEP, using 683 pb/sup -1/ of data collected at centre-of-mass energies from 183 to 209 GeV. Differential cross sections are determined as functions of the transverse momentum and pseudorapidity of the D*/sup +or-/ mesons in the kinematic region 1 GeV<P/sub T/<12 GeV and β <1.4. [...]
2002 - Published in : Phys. Lett. B 535 (2002) 59-69
3.
Measurements of the b¯b production cross section and forward-backward asymmetry at centre-of-mass energies above the Z pole at LEP / L3 Collaboration
The measurements of R/sub b/= sigma (e/sup +/e/sup -/ to bb)/ sigma (e/sup +/e/sup -/ to qq) and of the b quark forward-backward charge asymmetry, A/sub fb//sup b/, at centre-of-mass energies above the Z pole are described. The measurement of R/sub b/ is performed at square root (s) between 130 and 189 GeV using a b-tagging method that exploits the relatively large decay length of b-hadrons. [...]
Geneva : CERN, 2000 - Published in : Phys. Lett. B 485 (2000) 71-84
4.
Hadrons at LEP / L3 Collaboration
1999 - Published in : Phys. Lett. B 453 (1999) 333-42
5.
χc2 formation in two-photon collisions at LEP / L3 Collaboration
1999 - Published in : Phys. Lett. B 453 (1999) 73-82
6.
Search for Scalar Leptons in e+e collisions at s= 183 GeV / L3 Collaboration
We report the result of a search for scalar leptons in e+e collisions at 183 GeV centre-of-mass energy at LEP. No evidence for such particles is found in a data sample of 55.2 pb1. [...]
CERN-EP-99-024; CERN-L3-172.- Geneva : CERN, 1999 - 18 p. - Published in : Phys. Lett. B 456 (1999) 283-96 Fulltext: PDF; - Please contact the library if you need to access this document.
7.
Search for R-parity Violating Chargino and Neutralino Decays in e+e Collisions up to s= 183 GeV / L3 Collaboration
A search for chargino and neutralino pair production in e+e collisions at center-of-mass energies between 161~\textrm{Ge\kern -0.1em V} and 183~\textrm{Ge\kern -0.1em V} is performed under the assumptions that R-parity is not conserved and that only purely leptonic or hadronic R-parity violating decays are allowed. No signal is found in the data. [...]
CERN-EP-99-023; CERN-L3-173.- Geneva : CERN, 1999 - 20 p. - Published in : Phys. Lett. B 459 (1999) 354-366 Fulltext: PDF; - Please contact the library if you need to access this document.
8.
Study of Neutral-Current Four-Fermion and ZZ Production in e+e Collisions at s= 183 GeV / L3 Collaboration
Study of Neutral--Current Four--Fermion and ZZ \\ Production in e+e Collisions at s= 183 GeV A study of neutral--current four--fermion processes is performed using a data sample corresponding to 55.3~pb1 of integrated luminosity collected by the L3 detector at LEP at an average centre--of--mass energy of 183 \GeV. The neutral--current four--fermion cross sections for final states with a pair of charged leptons plus jets and with four charged leptons are measured to be consistent with the Standard Model predictions. [...]
CERN-EP-98-206; CERN-L3-169.- Geneva : CERN, 1999 - 23 p. - Published in : Phys. Lett. B 450 (1999) 281-93 Fulltext: PDF; - Please contact the library if you need to access this document.
9.
Measurement of the cross-section for the process γγ hadrons at LEP / L3 Collaboration
Measurements of the two-photon interaction e+e- --> e+e- hadrons at sqrt(s) = 91 GeV and sqrt(s) = 183 GeV are presented. The double-tag events, collected with the L3 detector, correspond to integrated luminosities of 140 pb-1 at 91 GeV and 52 pb-1 at 183 GeV. [...]
CERN-EP-98-205; CERN-L3-168.- Geneva : CERN, 1999 - 16 p. - Published in : Phys. Lett. B 453 (1999) 333-342 Fulltext: PDF; - Please contact the library if you need to access this document.
10.
Heavy Quarkonium Production in Z Decays / L3 Collaboration
We report measurements of the inclusive production of heavy quarkonium states in Z decays based on the analysis of 3.6 million hadronic events collected by the L3 detector at LEP. The measurement of inclusive J production and an improved 95% confidence level upper limit on Υ production are presented [...]
CERN-EP-98-204; CERN-L3-167.- Geneva : CERN, 1999 - 18 p. - Published in : Phys. Lett. B 453 (1999) 94 Fulltext: PDF; - Please contact the library if you need to access this document.

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