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Muons in air showers at the Pierre Auger Observatory: Measurement of atmospheric production depth
Pierre Auger Collaboration
The surface detector array of the Pierre Auger Observatory provides information about the longitudinal development of the muonic component of extensive air showers. Using the timin…
A measurement of the branching fractions of the b-quark into charged and neutral b-hadrons
The DELPHI Collaboration, J. Abdallah
The production fractions of charged and neutral b-hadrons in b-quark events from Z0 decays have been measured with the DELPHI detector at LEP. An algorithm has been developed, base…
Measurement of Inclusive f_1(1285) and f_1(1420) Production in Z Decays with the DELPHI Detector
The DELPHI Collaboration, J. Abdallah
DELPHI results are presented on the inclusive production of two (K Kbar pi)^0 states in the mass region 1.2-1.6 GeV/c^2 in hadronic Z decays at LEP I. The measured masses (widths)…
Study of Inclusive J/psi Production in Two-Photon Collisions at LEP II with the DELPHI Detector
The DELPHI Collaboration, J. Abdallah
Inclusive J/psi production in photon-photon collisions has been observed at LEP II beam energies. A clear signal from the reaction gamma gamma -> J/psi+X is seen. The number of obs…
Inclusive b Decays to Wrong Sign Charmed Mesons
The DELPHI Collaboration, J. Abdallah
The production of wrong sign charmed mesons b -> \bar D_{(s)} X, D_{(s)}=(D0,D+,D_s), is studied using the data collected by the DELPHI experiment in the years 1994 and 1995. Charm…
Search for Doubly Charged Higgs Bosons at LEP2
The DELPHI Collaboration, J. Abdallah
A search for pair-produced doubly charged Higgs bosons has been performed using the data collected by the DELPHI detector at LEP at centre-of-mass energies between 189 and 209 GeV.…
Rapidity-Alignment and p_T Compensation of Particle Pairs in Hadronic Z0 Decays
The DELPHI Collaboration, J. Abdallah
Observation is made of rapidity-alignment of K+K- and ppbar pairs which results from their asymmetric orientation in rapidity, with respect to the direction from primary quark to a…
Search for Charged Higgs Bosons in e+e- Collisions at sqrt(s)=189-202 GeV
The DELPHI Collaboration, J. Abdallah
A search for pair-produced charged Higgs bosons was performed in the high energy data collected by the DELPHI detector at LEP II at centre-of-mass energies from 189 GeV to 202 GeV.…
Single Intermediate Vector Boson Production in e+e- collisions at sqrt(s) = 183 and 189 GeV
DELPHI Collaboration, P. Abreu
The cross-sections for the production of single charged and neutral intermediate vector bosons were measured using integrated luminosities of 52 pb^{-1} and 154 pb^{-1} collected b…
Determination of |Vub|/|Vcb| with DELPHI at LEP
The DELPHI Collaboration, P. Abreu
The ratio of the CKM quark-mixing matrix elements |Vub|/|Vcb| has been measured using B hadron semileptonic decays. The analysis uses the reconstructed mass M_X of the secondary ha…
Measurement of the anti-B ---> D* pi lepton anti-neutrino(lepton) Branching Fraction
The DELPHI Collaboration, P. Abreu
A study of b semileptonic decays into D, D pi+- and D* pi+- final states is presented. The D0, D+ and D*+ mesons are exclusively reconstructed in Z decay data recorded from 1992 to…
Rapidity-Rank Structure of p pbar Pairs in Hadronic Z0 Decays
The DELPHI Collaboration, P. Abreu
The rapidity-rank structure of p pbar pairs is used to analyze the mechanism of baryon production in hadronic Z0 decay. The relative occurrence of the rapidity-ordered configuratio…
Measurement of the Mass and Width of the W Boson in e+e- Collisions at sqrt(s) = 189 GeV
The DELPHI Collaboration, P. Abreu
A measurement of the W mass and width has been performed by the DELPHI collaboration using the data collected during 1998. The data sample has an integrated luminosity of 155 pb^{-…
Measurement of V_{cb} from the decay process \bar{B^0} -> D^{*+} \ell^- \barν
The DELPHI Collaboration, P. Abreu
A new precise measurement of |V_{cb}| and of the branching ratio BR(\bar{B^0} -> D^{*+} \ell^- \bar{ν_\ell}) has been performed using a sample of about 5000 semileptonic decays \ba…
Search for charginos in e+e- interactions at sqrt(s) = 189 GeV
The DELPHI Collaboration, P. Abreu
An update of the searches for charginos and gravitinos is presented, based on a data sample corresponding to the 158 pb^{-1} recorded by the DELPHI detector in 1998, at a centre-of…
Search for a fermiophobic Higgs at LEP 2
The DELPHI Collaboration, P. Abreu
Higgs bosons predicted by the fermiophobic scenario within Two Higgs Doublets Models were searched for in the data collected by the DELPHI detector at centre-of-mass energies betwe…
Search for Heavy Stable and Long-Lived Particles in e+e- Collisions at sqrt(s)=189 GeV
The DELPHI Collaboration, P. Abreu
A search for stable and long-lived heavy charged particles was performed using the data taken by the DELPHI experiment at an energy of 189 GeV. The Cherenkov light detected in the…
Update of the search for charginos nearly mass-degenerate with the lightest neutralino
The DELPHI Collaboration, P. Abreu
The data collected by DELPHI in 1998 at the centre-of-mass energy of 189 GeV have been used to update the search for charginos nearly mass-degenerate with the lightest supersymmetr…
Search for supersymmetric partners of top and bottom quarks at sqrt(s) = 189 GeV
The DELPHI Collaboration, P. Abreu
Searches for supersymmetric partners of top and bottom quarks are presented using data taken by the DELPHI experiment at LEP in 1997 and 1998. No deviations from standard model exp…
Measurement and Interpretation of Fermion-Pair Production at LEP Energies of 183 and 189 GeV
The DELPHI Collaboration, P. Abreu
An analysis of the data collected in 1997 and 1998 with the DELPHI detector at e+e- collision energies close to 183 and 189 GeV was performed in order to extract the hadronic and l…
Hadronization properties of b quarks compared to light quarks in e+e- -> q qbar from 183 to 200 GeV
The DELPHI Collaboration, P. Abreu
The DELPHI detector at LEP has collected 54 pb^{-1} of data at a centre-of-mass energy around 183 GeV during 1997, 158 pb^{-1} around 189 GeV during 1998, and 187 pb^{-1} between 1…
Inclusive Sigma- and Lambda(1520) production in hadronic Z decays
The DELPHI Collaboration, P. Abreu
Production of Sigma- and Lambda(1520) in hadronic Z decays has been measured using the DELPHI detector at LEP. The Sigma- is directly reconstructed as a charged track in the DELPHI…
Search for R-parity violation with a Ubar Dbar Dbar coupling at sqrt(s)=189 GeV
The DELPHI Collaboration, P. Abreu
Searches for pair production of gauginos and squarks in e+e- collisions at a centre-of-mass energy of 189 GeV have been performed on data corresponding to an integrated luminosity…
Limits on the Masses of Supersymmetric Particles at sqrt(s)=189 GeV
The DELPHI Collaboration, P. Abreu
Searches for charginos, neutralinos and sleptons at LEP2 centre-of-mass energies from 130 GeV to 189 GeV have been used to set lower limits on the mass of the Lightest Supersymmetr…