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CERN Document Server 2,049 records found  1 - 10próximoend  jump to record: Search took 1.62 seconds. 
1.
(100)
Search for a fourth generation b'-quark at LEP-II at sqrt{s}=196-209 GeV / DELPHI Collaboration
A search for the pair production of fourth generation b'-quarks was performed using data taken by the DELPHI detector at LEP-II. The analysed data were collected at centre-of-mass energies ranging from 196 to 209 GeV, corresponding to an integrated luminosity of 420 pb^{-1}. [...]
arXiv:0704.0594; CERN-PH-EP-2006-023; CERN-PH-EP-2006-023.- Geneva : CERN, 2007 - 26 p. - Published in : Eur. Phys. J. C 50 (2007) 507-518 Fulltext: PDF; External link: Fulltext
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2.
(91)
A Study of $b\overline{b}$ Production in $e^{+}e^{-}$ Collisions at $\sqrt{s}$ = 130-207 GeV / DELPHI Collaboration
Measurements are presented of R_b, the ratio of the b bbar cross-section to the q qbar cross-section in e+e- collisions, and the forward-backward asymmetry A^b_FB at twelve energy points in the range sqrt(s) = 130-207 GeV. These results are found to be consistent with the Standard Model expectations. [...]
arXiv:0901.4461; CERN-PH-EP-2008-018; CERN-PH-EP-2008-018.- 2009 - 21 p. - Published in : Eur. Phys. J. C 60 (2009) 1-15 Fulltext: arXiv:0901.4461 - PDF; 10052_2009_917_OnlinePDF - PDF; External link: Fulltext
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3.
(85)
Measurement of the Tau Lepton Polarisation at LEP2 / DELPHI Collaboration
A first measurement of the average polarisation P_tau of tau leptons produced in e+e- annihilation at energies significantly above the Z resonance is presented. The polarisation is determined from the kinematic spectra of tau hadronic decays. [...]
arXiv:0710.1368; CERN-PH-EP-2007-010; CERN-PH-EP-2007-010.- 2008 - 17 p. - Published in : Phys. Lett. B 659 (2008) 65-73 Fulltext: PDF; External link: Preprint
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4.
(78)
Inclusive single-particle production in two-photon collisions at LEP II with the DELPHI detector / DELPHI Collaboration
A study of the inclusive charged hadron production in two-photon collisions is described. The data were collected with the DELPHI detector at LEP II. [...]
arXiv:0906.5302; CERN-PH-EP-2008-017; CERN-PH-EP-2008-017.- Geneva : CERN, 2009 - 15 p. - Published in : Phys. Lett. B 678 (2009) 444-449 Fulltext: arXiv:0906.5302 - PDF; S0370269309007503 - XML;
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5.
(76)
Observation of the Muon Inner Bremsstrahlung at LEP1 / DELPHI Collaboration
Muon bremsstrahlung photons converted in front of the DELPHI main tracker (TPC) in dimuon events at LEP1 were studied in two photon kinematic ranges: 0.2 < E_gamma <= 1 GeV and transverse momentum with respect to the parent muon p_T < 40 MeV/c, and 1 < E_gamma <= 10 GeV and p_T < 80 MeV/c . A good agreement of the observed photon rate with predictions from QED for the muon inner bremsstrahlung was found, contrary to the anomalous soft photon excess that has been observed recently in hadronic Z^0 decays. [...]
arXiv:0901.4488; CERN-PH-EP-2007-012; CERN-PH-EP-2007-012.- 2008 - 24 p. - Published in : Eur. Phys. J. C 57 (2008) 499-514 Fulltext: arXiv:0901.4488 - PDF; 10052_2008_779_OnlinePDF - PDF; External link: Fulltext
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6.
(76)
Study of b-quark mass effects in multijet topologies with the DELPHI detector at LEP / DELPHI Collaboration
The effect of the heavy b-quark mass on the two, three and four-jet rates is studied using LEP data collected by the DELPHI experiment at the Z peak in 1994 and 1995. The rates of b-quark jets and light quark jets (l = uds) in events with n = 2, 3, and 4 jets, together with the ratio of two and four-jet rates of b-quarks with respect to light-quarks, R_n^bl, have been measured with a double-tag technique using the CAMBRIDGE jet-clustering algorithm. [...]
arXiv:0804.3883; CERN-PH-EP-2007-011; CERN-PH-EP-2007-011.- 2008 - 24 p. - Published in : Eur. Phys. J. C 55 (2008) 525-538 Fulltext: PDF; External link: Fulltext
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7.
(76)
A study of the b-quark fragmentation function with the DELPHI detector at LEP I and an averaged distribution obtained at the Z Pole / DELPHI Collaboration
The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by the DELPHI detector at LEP. Two complementary methods are used to reconstruct the energy of weakly decaying b-hadrons, E^weak_B. [...]
arXiv:1102.4748; CERN-PH-EP-2010-057; CERN-PH-EP-2010-057.- Geneva : CERN, 2011 - 50 p. - Published in : Eur. Phys. J. C 71 (2011) 1557 Fulltext: CERN-PH-EP-2010-057 - PDF; arXiv:1102.4748 - PDF; Preprint: PDF; External link: Rivet analyses reference
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8.
(76)
Correlations between Polarisation States of W Particles in the Reaction $e^- e^+\to W^- W^+$ at LEP2 Energies 189-209 GeV / DELPHI Collaboration
In a study of the reaction e-e+ -> W-W+ with the DELPHI detector, the probabilities of the two W particles occurring in the joint polarisation states transverse-transverse (TT), longitudinal-transverse plus transverse-longitudinal (LT) and longitudinal-longitudinal (LL) have been determined using the final states WW -> l nu q qbar (l = e, mu). The two-particle joint polarisation probabilities, i.e. [...]
arXiv:0908.1023; CERN-PH-EP-2009-003; CERN-PH-EP-2009-003.- Geneva : CERN, 2009 - 20 p. - Published in : Eur. Phys. J. C 63 (2009) 611-623 Fulltext: PDF; External link: Preprint
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9.
(76)
Search for one large extra dimension with the DELPHI detector at LEP / DELPHI Collaboration
Single photons detected by the DELPHI experiment at LEP2 in the years 1997-2000 are reanalysed to investigate the existence of a single extra dimension in a modified ADD scenario with slightly warped large extra dimensions. The data collected at centre-of-mass energies between 180 and 209 GeV for an integrated luminosity of ~650 pb^{-1} agree with the predictions of the Standard Model and allow a limit to be set on graviton emission in one large extra dimension. [...]
arXiv:0901.4486; CERN-PH-EP-2008-013; CERN-PH-EP-2008-013.- 2009 - 11 p. - Published in : Eur. Phys. J. C 60 (2009) 17-23 Fulltext: 10052_2009_874_OnlinePDF - PDF; arXiv:0901.4486 - PDF; External link: Fulltext
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10.
(76)
Di-jet production in $\gamma\gamma$ collisions at LEP2 / DELPHI Collaboration
The production of two high-p_T jets in the interactions of quasi-real photons in e+e- collisions at sqrt{s_ee} from 189 GeV to 209 GeV is studied with data corresponding to an integrated e+e- luminosity of 550 pb^{-1}. The jets reconstructed by the k_T cluster algorithm are defined within the pseudo-rapidity range -1 < eta < 1 and with jet transverse momentum, p_T, above 3 GeV/c. [...]
arXiv:0901.4500; CERN-PH-EP-2008-012; CERN-PH-EP-2008-012.- 2008 - 17 p. - Published in : Eur. Phys. J. C 58 (2008) 531-541 Fulltext: arXiv:0901.4500 - PDF; 10052_2008_777_OnlinePDF - PDF; External link: DURHAM
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