CERN Accelerating science

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1.
Search for Charged Higgs bosons: Combined Results Using LEP data / ALEPH, DELPHI, L3 and OPAL Collaborations
The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for pair-produced charged Higgs bosons in the framework of Two Higgs Doublet Models (2HDMs). The data of the four experiments are statistically combined. [...]
arXiv:1301.6065; CERN-PH-EP-2012-369; CERN-PH-EP-2012-369; LHWG-Note-2012-01; ALEPH-2012-001-PHYSICS-2012-001; DELPHI-2012-001-PHYS-953; L3-Note-2835; OPAL-PR433.- Geneva : CERN, 2013 - 18 p. - Published in : Eur. Phys. J. C 73 (2013) 2463 Draft (restricted): PDF; Fulltext: CERN-PH-EP-2012-369 - PDF; arXiv:1301.6065 - PDF; External link: Preprint
2.
Generalized event shape and energy flow studies in $e^+ e^-$ annihilation at $\sqrt{s}$ = 91.2-208.0 GeV / L3 Collaboration
We present results from a study of hadronic event structure in high energy e(+)e(-') interactions using the L3 detector at LEP. A new class of event shape distributions are measured at and above the Z boson pole for light quark (u, d, s, c) flavours. [...]
2011 - 59 p. - Published in : JHEP 10 (2011) 143 Springer Open Access article: PDF;
3.
Test of the $\tau$-Model of Bose-Einstein Correlations and Reconstruction of the Source Function in Hadronic Z-boson Decay at LEP / L3 Collaboration
Bose-Einstein correlations of pairs of identical charged pions produced in ha- dronic Z decays are analyzed in terms of various parametrizations. A good descrip- tion is achieved using a L ́evy stable distribution in conjunction with a model where a particle’s momentum is correlated with its space-time point of production, the tau-model. [...]
arXiv:1105.4788; CERN-PH-EP-2011-080; CERN-PH-EP-2011-080.- Geneva : CERN, 2011 - 40 p. - Published in : Eur. Phys. J. C 71 (2011) 1648 CERN-PH-EP-2011-080 (2011-05-20): PDF; Fulltext: PDF; External link: Preprint
4.
Study of hadronic event shape in flavour tagged events in $e^{+} e^{-}$ annihilation at $<\sqrt{S}>$ = 197 GeV / L3 Collaboration
Results are presented from a study of the structure of hadronic events in highenergy (e^+)(e^-) interactions detected by the L3 detector at LEP. Various event shape distributions and their moments are measured at several energy points at and above the Z-boson mass. [...]
arXiv:0907.2658; CERN-PH-EP-2008-011.- Geneva : CERN, 2008 - 29 p. - Published in : PMC Phys. A 2 (2008) 6 Fulltext: CERN-PH-EP-2008-011 - PDF; arXiv:0907.2658 - PDF; External link: Preprint
5.
Study of the Solar Anisotropy for Cosmic Ray Primaries of about 200 GeV Energy with the L3+C Muon Detector / L3 Collaboration
Primary cosmic rays experience multiple deflections in the nonuniform galactic and heliospheric magnetic fields which may generate anisotropies. A study of anisotropies in the energy range between 100 and 500 GeV is performed. [...]
CERN-PH-EP-2008-009.- Geneva : CERN, 2008 - Published in : Astron. Astrophys. 488 (2008) 1093-1100 Fulltext: PDF;
6.
Study of resonance formation in the mass region 1400 - 1500 MeV through the reaction $\gamma\gamma \to K^{0}_{S} K^{\pm} \pi^{\mp}$ / L3 Collaboration
The K^0_SK^+-\pi-+ final state in two-photon collisions is studied with the L3 detector at LEP at e+e- centre-of-mass energies from 183 to 209 GeV with an integrated luminosity of 664.6 pb-1. The \eta(1475) and f1(1420) mesons are observed and their contribution is separated by measuring the formation rates as a function of the photon virtuality Q2. [...]
CERN-PH-EP-2006-041.- Geneva : CERN, 2007 - 20 p. - Published in : JHEP 03 (2007) 018 Fulltext: PDF; SISSA/IOP Open Access article: PDF;
7.
Analysis of the $\pi^+ \pi^- \pi^+ \pi-$ and $\pi^+ \pi^{0}\pi^- \pi^{0}$ final states in quasi-real two-photon collisions at LEP / L3 Collaboration
The reactions gamma gamma -> pi^+pi^-pi^+pi^- and gamma gamma -> pi^+pi^0pi^-pi^0 are studied with the L3 detector at LEP in a data sample collected at centre-of-mass energies from 161GeV to 209GeV with a total integrated luminosity of 698/pb. A spin-parity-helicity analysis of the rho^0 rho^0 and rho^+ rho^- systems for two-photon centre-of-mass energies between 1GeV and 3GeV shows the dominance of the spin-parity state 2+ with helicity 2. [...]
hep-ex/0605021; CERN-PH-EP-2005-058; hep-ex/0605021; CERN-L3-306; CERN-PH-EP-2005-058.- 2006 - 19 p. - Published in : Phys. Lett. B 638 (2006) 128-139 Fulltext: cer-002667238 - PDF; arXiv:hep-ex_0605021 - PDF; External link: Preprint
8.
Study of inclusive strange-baryon production and search for pentaquarks in two-photon collisions at LEP / L3 Collaboration
Measurements of inclusive production of the Lambda, Xi- and Xi*(1530) baryons in two-photon collisions with the L3 detector at LEP are presented. The inclusive differential cross sections for Lambda and Xi- are measured as a function of the baryon transverse momentum, pt, and pseudo-rapidity, eta. [...]
hep-ex/0609054; CERN-PH-EP-2006-028; CERN-L3-308; CERN-PH-EP-2006-028.- Geneva : CERN, 2007 - 31 p. - Published in : Eur. Phys. J. C 49 (2007) 395-410 Fulltext: arXiv:hep-ex_0609054 - PDF; 0609054 - PDF; External link: Preprint
9.
Measurement of hadron and lepton-pair production in $e^{+}e^{-}$ collisions at $\sqrt{s} = 192 - 208 GeV$ at LEP / L3 Collaboration
Hadron production and lepton-pair production in e+e- collisions are studied with data collected with the L3 detector at LEP at centre-of-mass energies sqrt{s}=192-208GeV. Using a total integrated luminosity of 453/pb, 36057 hadronic events and 12863 lepton-pair events are selected. [...]
hep-ex/0603022; CERN-PH-EP-2005-044; CERN-EP-PH-2005-044; CERN-EP-PH-2005-044-[SIC!]; CERN-L3-302; CERN-PH-EP-2005-044.- Geneva : CERN, 2006 - 38 p. - Published in : Eur. Phys. J. C 47 (2006) 1-19 Fulltext: 0603022 - PDF; arXiv:hep-ex_0603022 - PDF; External link: Preprint
10.
Search for neutral MSSM Higgs bosons at LEP / ALEPH Collaboration
The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric Standard Model (MSSM). The data of the four collaborations are statistically combined and examined for their consistency with the background hypothesis and with a possible Higgs boson signal. [...]
hep-ex/0602042; CERN-PH-EP-2006-001; CERN-L3-307; CERN-PH-EP-2006-001.- Geneva : CERN, 2006 - 82 p. ALEPH Papers - Published in : Eur. Phys. J. C 47 (2006) 547 Fulltext: arXiv:hep-ex_0602042 - PDF; phep-2006-001 - PDF; 0602042 - PDF; External link: Preprint

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