53 Result(s)
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Article
Measurement of \(\frac{{\Gamma _{b\bar b} }}{{\Gamma _{had} }}\) using impact parameter measurements and lepton identification
The partial decay width of theZ to \(b\bar b\) quark pairs has been measured by the DELPHI detector at LEP.b-hadrons...
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Article
B * production in Z decays
The decayB *→B γ has been observed with the DELPHI detector at LEP, where theB * meson is produced inZ boson decays. The combination of inclusively reconstructedB mesons with well-measured converted photons yield...
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Article
Lifetime and production rate of beauty baryons from Z decays
The production and decay of beauty baryons (b-baryons) have been studied using 1.7×106 Z hadronic decays collected by the DELPHI detector at LEP. Three different techniques were used to identify theb-baryons. The...
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Article
Measurement of the forward-backward asymmetry of charm and bottom quarks at theZ pole usingD *± mesons
The forward-backward asymmetries for the processes \(e^ + e^ - \to c\bar c\) and
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Article
Lifetime of charged and neutral B hadrons using event topology
The lifetimes of charged and neutral B hadrons have been measured using data collected by the DELPHI experiment at LEP between 1991 and 1993. B hadrons are tagged as jets with a secondary vertex and the charge...
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Article
Measurements of the τ polarisation in Z0 decays
A sample of Z0→τ+τ− events observed in the DELPHI detector at LEP in 1991 and 1992 is analysed to measure the τ polarisation in the exclusive decay channels
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Article
A measurement of B+ and B0 lifetimes using \(\bar D\ell ^ + \) events
A measurement of B meson lifetimes is presented using data collected from 1991 to 1993 by the DELPHI detector at the LEP collider. Samples of events with a D meson and a lepton in the same jet are selected where ...
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Article
Search for heavy neutral Higgs bosons in two-doublet models
A search for pair production of neutral heavy Higgs bosons decaying into \(b\bar b\) has been carried out in a study...
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Article
First measurement of the strange quark asymmetry at the Z0 peak
A measurement of the strange quark forward-backward asymmetry at the Z0 peak was performed using 718,000 multihadronic Z0 decays collected by the DELPHI detector at LEP in 1992. Thes-quark was tagged by the prese...
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Article
Study of hard scattering processes in multihadron production from γγ collisions at LEP
The production of multihadronic states in γγ collisions at LEP has been studied with the DELPHI detector. The analyzed data correspond to an integrated luminosity of about 32pb−1, collected in the LEP runs of 199...
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Article
Production rate and decay lifetime measurements ofB s 0 mesons at LEP usingD s andϕ mesons
The study of the properties of inclusive production ofD s mesons and of events in which a ϕ and a muon are present in the same jet provides two independent measurements of the ...
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Article
Search for pair-produced heavy scalars in Z0 decays
A search for charged Higgs bosons decaying into quarks is described, based on statistics of around 1.7 million hadronic Zo decays detected in DELPHI. Despite the very high background from standard hadronic decays...
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Article
A precision measurement of the average lifetime ofB hadrons
The average lifetime ofB hadrons was measured using data collected with the DELPHI detector at the LEP collider during 1991 and 1992. The measurement was performed using two different anayses. The first method wa...
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Article
Invariant mass dependence of particle correlations in hadronic final states from the decay of theZ 0
Two-particle correlations in invariant mass are studied separately for like-sign and unlike-sign pions. Strong correlations are observed only at small masses. The correlations decrease very rapidly for like-si...
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Article
A measurement ofD meson production inZ 0 hadronic decays
A study of the fragmentation properties of charm and bottom quarks intoD mesons is presented. From 263 700Z 0 hadronic decays collected in 1991 with the DELPHI detector at the LEP collider,D 0,D + andD *+ are rec...
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Article
Measurement of the triple-gluon vertex from 4-jet events at LEP
From the combined data of 1990 and 1991 of the DELPHI experiment at LEP, 13057 4-jet events are obtained and used for determining the contribution of the triple-gluon vertex. The relevant variables are the gen...
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Article
A measurement ofB meson production and lifetime usingDl − events inZ 0 decays
A study ofB meson decays intoDl X final states is presented. In these events, neutral and chargedD mesons originate predominantly fromB + andB 0 decays, respectively. The dilution of this correlation due toD ** p...
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Article
Determination ofα s using the next-to-leading-log approximation of QCD
A new measurement of αs is obtained from the distributions in thrust, heavy jet mass, energy-energy correlation and two recently introduced jet broadening variables following a method proposed by Catani, Trentadu...
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Article
Measurement of the average lifetime ofB hadrons
The average lifetime ofB hadrons produced in hadronicZ 0 decays has been measured with the DELPHI detector at LEP. The measurement is based on the analysis of the impact parameter distributions of highp ...
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Article
A study of the decays of tau leptons produced on theZ resonance at LEP
From the analysis of a data sample corresponding to an integrated luminosity of 4.63 pb−1 taken during the 1990 run of LEP at centre of mass energies between 88.2 GeV an 94.2 GeV, the tau decays ...
