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1.	Schael, S, et al. (författare) Precision electroweak measurements on the Z resonance 2006 Ingår i: Physics Reports. - : Elsevier BV. - 0370-1573 .- 1873-6270. ; 427:5-6, s. 257-454 Forskningsöversikt (refereegranskat)abstract We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLID experiment using a polarised beam at SLC. The measurements include cross-sections, forward-backward asymmetries and polarised asymmetries. The mass and width of the Z boson, m(Z) and Gamma(Z), and its couplings to fermions, for example the p parameter and the effective electroweak mixing angle for leptons, are precisely measured: m(Z) = 91.1875 +/- 0.0021 GeV, Gamma(Z) = 2.4952 +/- 0.0023 GeV, rho(l) = 1.0050 +/- 0.0010, sin(2)theta(eff)(lept) = 0.23153 +/- 0.00016. The number of light neutrino species is determined to be 2.9840 +/- 0.0082, in agreement with the three observed generations of fundamental fermions. The results are compared to the predictions of the Standard Model (SM). At the Z-pole, electroweak radiative corrections beyond the running of the QED and QCD coupling constants are observed with a significance of five standard deviations, and in agreement with the Standard Model. Of the many Z-pole measurements, the forward-backward asymmetry in b-quark production shows the largest difference with respect to its SM expectation, at the level of 2.8 standard deviations. Through radiative corrections evaluated in the framework of the Standard Model, the Z-pole data are also used to predict the mass of the top quark, m(t) = 173(+10)(+13) GeV, and the mass of the W boson, m(W) = 80.363 +/- 0.032 GeV. These indirect constraints are compared to the direct measurements, providing a stringent test of the SM. Using in addition the direct measurements of m(t) and m(W), the mass of the as yet unobserved SM Higgs boson is predicted with a relative uncertainty of about 50% and found to be less than 285 GeV at 95% confidence level. (c) 2006 Elsevier B.V. All rights reserved.
2.	Abreu, P., et al. (författare) Measurement of the gluon fragmentation function and a comparison of the scaling violation in gluon and quark jets 2000 Ingår i: European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; 13:4, s. 573-589 Tidskriftsartikel (refereegranskat)abstract The fragmentation functions of quarks and gluons are measured in various three-jet topologies in Z decays from the full data set collected with the DELPHI detector at the Z resonance between 1992 and 995. The results at different values of transverse momentum-like scales are compared. A parameterization of the quark and gluon fragmentation functions at a fixed reference scale is given. The quark and gluon fragmentation functions show the predicted pattern of scaling violations. The scaling violation for quark jets as a function of a transverse momentum-like scale is in a good agreement with that observed in lower energy e+e- annihilation experiments. For gluon jets it appears to be significantly stronger. The scale dependences of the gluon and quark fragmentation functions agree with the prediction of the DGLAP evolution equations from which the colour factor ratio CA/CF is measured to be: CA/CF = 2.26 ± 0.09stat. ± 0.06sys. ± 0.12clus.,scale..
3.	Abreu, P., et al. (författare) Study of dimuon production in photon-photon collisions and measurement of QED photon structure functions at LEP 2001 Ingår i: European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; 19:1, s. 15-28 Tidskriftsartikel (refereegranskat)abstract Muon pair production in the process e+e- → e+e- μ+μ- is studied using the data taken at LEP1 (√s ≃ mz) with the DELPHI detector during the years 1992-1995. The corresponding integrated luminosity is 138.5 pb-1. The QED predictions have been tested over the whole Q2 range accessible at LEP1 (from several GeV2/c4 to several hundred GeV2/c4) by comparing experimental distributions with distributions resulting from Monte Carlo simulations using various generators. Selected events are used to extract the leptonic photon structure function Fγ 2. Azimuthal correlations are used to obtain information on additional structure functions, Fγ A and Fγ B, which originate from interference terms of the scattering amplitudes. The measured ratios Fγ A/Fγ 2 and FγB/Fγ 2 are significantly different from zero and consistent with QED predictions.
4.	Abreu, P., et al. (författare) Search for sleptons in e+e- collisions at √s = 183 to 189 GeV 2001 Ingår i: European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; 19:1, s. 29-42 Tidskriftsartikel (refereegranskat)abstract Data taken by the DELPHI experiment at centre-of-mass energies of 183 GeV and 189 GeV with a total integrated luminosity of 212 pb-1 have been used to search for the supersymmetric partners of the electrons, muons, and taus in the context of the Minimal Supersymmetric Standard Model (MSSM). The decay topologies searched for were the direct decay (ℓ̃ → ℓx̃), producing acoplanar lepton pairs plus missing energy, and the cascade decay (ℓ → ℓx̃0 2 → ℓγx̃0 1), producing acoplanar lepton and photon pairs plus missing energy. The observed number of events is in agreement with Standard Model predictions. The 95% CL excluded mass limits for selectrons, smuons and staus are mẽ ≤ 87 GeV/c2, mμ̃ ≤ 80 GeV/c2 and mτ̃ 75 GeV/c2, respectively, for values of μ=-200 GeV/c2 and tanβ=1.5.
5.	Abdallah, J, et al. (författare) Rapidity-alignment and p(T) compensation of particle pairs in hadronic Z(0) decays 2002 Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 533:3-4, s. 243-252 Tidskriftsartikel (refereegranskat)abstract Observation is made of rapidity-alignment of K+K- and (p) over barp pairs which results from their asymmetric orientation in rapidity, with respect to the direction from primary quark to antiquark. The K+K- and (p) over barp data are consistent with predictions from the fragmentation string model. However, the (p) over barp data strongly disagree with the conventional implementation of the cluster model. The non-perturbative process of 'gluon splitting to diquarks' has to be incorporated into the cluster model for it to agree with the data. Local conservation of PT between particles nearby in rapidity (i.e., p(T) compensation) is analysed with respect to the thrust direction for pi(+)pi(-), K+K-, and (p) over barp pairs. In this case, the string model provides fair agreement with the data. The cluster model is incompatible with the data for all three particle pairs. The model with its central premiss of isotropically-decaying clusters predicts a p(T) correlation not seen in the data. (C) 2002 Elsevier Science B.V. All rights reserved.
6.	Abdallah, J, et al. (författare) Search for charged Higgs bosons in e(+)e(-) collisions root s=189-202 GeV 2002 Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 525:1-2, s. 17-28 Tidskriftsartikel (refereegranskat)abstract 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. The three different final states, taunutaunu, c (s) over bar(c) over bars and c (s) over bar taunu were considered. New methods were applied to reject wrong hadronic jet pairings and for the tau identification, where a discriminator based on tau polarisation and polar angles was used. No excess of data compared to the expected Standard Model processes was observed and the existence of a charged Higgs boson with mass lower than 71.5 GeV/c(2) is excluded at the 95% confidence level. (C) 2002 Published by Elsevier Science B.V.
7.	Abdallah, J, et al. (författare) Searches for neutral Higgs bosons in e(+)e(-), collisions from root s=191.6 to 201.7 GeV 2002 Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 23:3, s. 409-435 Tidskriftsartikel (refereegranskat)abstract Neutral Higgs bosons of the Standard Model (SM) and the Minimal Supersymmetric Standard Model (MSSM) were searched for in the data collected in 1999 by the DELPHI experiment at centre-of-mass energies between 191.6 and 201.7 GeV with a total integrated luminosity of 228 pb(-1). These analyses, in combination with our results at lower energies, set 95% confidence level lower mass bounds on the Standard Model Higgs boson (107.3 GeV/c(2)) and on the lightest neutral scalar (85.9 GeV/c(2)) and neutral pseudoscalar (86.5 GeV/c(2)) Higgs bosons in representative scans of the MSSM parameter space. An extended scan of the MSSM parameter space was also performed to test the robustness of these limits.
8.	Abdallah, J, et al. (författare) Study of inclusive J/psi production in two-photon collisions at LEP II with the DELPHI detector 2003 Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 565:1-4, s. 76-86 Tidskriftsartikel (refereegranskat)abstract Inclusive J/psi production in photon-photon collisions has been observed at LEP II beam energies. A clear signal from the reaction gammagamma --> J/psi + X is seen. The number of observed N(J/psi --> mu(+)mu(-)) events is 36+/-7 for an integrated luminosity of 617 pb(-1), yielding a cross-section of sigma(J/psi + X) = 45+/-9(stat) +/- 17(syst) pb. Based on a study of the event shapes of different types of gammagamma processes in the PYTHIA program, we conclude that (74+/-22) % of the observed J/psi events are due to 'resolved' photons, the dominant contribution of which is most probably due to the gluon content of the photon. (C) 2003 Published by Elsevier B.V.
9.	Abreu, P, et al. (författare) b-tagging in DELPHI at LEP 2004 Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 32:2, s. 185-208 Tidskriftsartikel (refereegranskat)abstract The standard method used for tagging b-hadrons in the DELPHI experiment at the CERN LEP Collider is discussed in detail. The main ingredient of b-tagging is the impact parameters of tracks, which relies mostly on the vertex detector. Additional information, such as the mass of particles associated to a secondary vertex, significantly improves the selection efficiency and the background suppression. The paper describes various discriminating variables used for the tagging and the procedure of their combination. In addition, applications of b-tagging to some physics analyses, which depend crucially on the performance and reliability of b-tagging, are described briefly.
10.	Abreau, P, et al. (författare) Photon events with missing energy at root s=183 to 189 GeV 2000 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. - 1434-6044. ; 17:1, s. 53-65 Tidskriftsartikel (refereegranskat)abstract The production of single photons has been studied in the reaction e(+)e(-) --> gamma +invisible particles at centre-of-mass energies of 183 GeV and 189 GeV. A previously published analysis of events with multiphoton final states accompanied by missing ene
11.	Abreau, P, et al. (författare) Two-dimensional analysis of the Bose-Einstein correlations in e(+)e(-) annihilation at the Z(0) peak 2000 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 471:4, s. 460-470 Tidskriftsartikel (refereegranskat)abstract The study of the directional dependence of two-particle correlations in the hadronic decays of the Z(0) boson is performed using the data collected by the DELPHI experiment in the 1992-1995 running periods. The comparison between the transverse, R-perpend
12.	Abreu, P, et al. (författare) A measurement of the Tau topological branching ratios 2001 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. - 1434-6044. ; 20:4, s. 617-637 Tidskriftsartikel (refereegranskat)abstract Using data collected in the DELPHI detector at LEP-1, measurements of the inclusive T branching ratios for decay modes containing one, three, or five charged particles have been performed, giving the following results: B-1 equivalent to B T- (particle)(-)
13.	Abreu, P, et al. (författare) A precise measurement of the partial decay width ratio R-b(0) = Gamma(b(b)over-bar)/Gamma(had) 1999 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 10:3, s. 415-442 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract The partial decay width of the Z to b (b) over bar quark pairs has been measured by the DELPHI detector at LEP using data taken in the years 1992 to 1995. Decays of b-hadrons were tagged by several methods using tracks with large impact parameters and/or
14.	Abreu, P, et al. (författare) A precise measurement of the tau polarisation at LEP-1 2000 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 14:4, s. 585-611 Tidskriftsartikel (refereegranskat)abstract The tau polarisation has been studied with the e(+)e(-) --> tau(+)tau(-) data collected by the DELPHI detector at LEP in 1993, 1994 and 1995 around the Z resonance firstly through the exclusive decay channels ev (v) over bar, mu v (v) over bar, pi v, rho
15.	Abreu, P, et al. (författare) A search for eta '(c) production in photon-photon fusion at LEP 1998 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 441:1-4, s. 479-490 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract A search for the production of the eta(c)' meson, the first radial excitation of the ground state of charmonium eta(c)(2980), in the photon-photon fusion reaction at LEP has been performed using the data collected by the DELPHI detector during 1992-1996.
16.	Abreu, P, et al. (författare) A search for heavy stable and long-lived squarks and sleptons in e(+)e(-) collisions at energies from 130 to 183 GeV 1998 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 444:3-4, s. 491-502 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract A search for stable and long-lived heavy charged particles used the data taken by the DELPHI experiment at energies from 130 to 183 GeV. The Cherenkov light detected in the Ring Imaging Cherenkov Detector and the ionization loss measured in the Time Proje
17.	Abreu, P, et al. (författare) A search for invisible Higgs bosons produced in e(+)e(-) interactions at LEP 2 energies 1999 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 459:1-3, s. 367-381 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract Searches for HZ production with the Higgs boson decaying into an invisible final state have been performed with the data collected by the DELPHI experiment up to the centre-of-mass energy of 183 GeV. The hadronic and muon pair final states of the Z boson
18.	Abreu, P, et al. (författare) A study of the Lorentz structure in tau decays 2000 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. - 1434-6044. ; 16:2, s. 229-252 Tidskriftsartikel (refereegranskat)abstract This paper describes a measurement of the Michel parameters, eta, rho, xi, xi delta, and the average v(tau) helicity, h(nu tau), in tau lepton decays together with the first measurement of the tensor coupling in the weak charged current. The tau(+)tau(-)
19.	Abreu, P, et al. (författare) Charged and identified particles in the hadronic decay of W bosons and in e(+)e(-) -> q(q)over-bar from 130 to 200 GeV 2000 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. ; 18:2, s. 203-228 Recension (övrigt vetenskapligt/konstnärligt)abstract Inclusive distributions of charged particles in hadronic W decays are experimentally investigated using the statistics collected by the DELPHI experiment at LEP during 1997, 1998 and 1999, at centre-of-mass energies from 183 to around 200 GeV. The possibl
20.	Abreu, P, et al. (författare) Consistent measurements of alpha(s) from precise oriented event shape distributions 2000 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 14:4, s. 557-584 Tidskriftsartikel (refereegranskat)abstract An updated analysis using about 1.5 million events recorded at root s = M-Z with the DELPHI detector in 1994 is presented. Eighteen infrared and collinear safe event shape observables are measured as a function of the polar angle of the thrust. axis. The
21.	Abreu, P, et al. (författare) Consistent measurements of alpha(s) from precise oriented event shape distributions (vol 14, pg 557, 2000) 2001 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. ; 19:4 Annan publikation (övrigt vetenskapligt/konstnärligt)
22.	Abreu, P, et al. (författare) Determination of P(c -> D(+)) and BR(c -> l(+)) at LEP 1 2000 Ingår i:* EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 12:2, s. 209-224 Tidskriftsartikel (refereegranskat)abstract The probability P(c --> D(+)) that a charm quark fragments into a D+ meson and the c --> l(+) semileptonic branching fraction were measured in Z(0) decay into c (c) over bar events. From the analysis of 3.5 Million Z(0) events collected from 1992 to 199
23.	Abreu, P, et al. (författare) Determination of the e(+)e(-)->gamma gamma(gamma) cross-section at centre-of-mass energies ranging from 189 GeV to 202 GeV 2000 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 491:1-2, s. 67-80 Tidskriftsartikel (refereegranskat)abstract A test of the QED process e(+)e(-) --> gamma gamma>() over bar (gamma) is reported. The data analysed were collected with the DELPHI detector in 1998 and 1999 at the highest energies achieved at LEP, reaching 202 GeV in the centre-of-mass. The total int
24.	Abreu, P, et al. (författare) Determination of vertical bar V-ub vertical bar/vertical bar V-cb vertical bar with DELPHI at LEP 2000 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 478:1-3, s. 14-30 Tidskriftsartikel (refereegranskat)abstract The ratio of the CKM quark-mixing matrix elements \V-ub\/\V-cb\ has been measured using B hadron semileptonic decays. The analysis uses the reconstructed mass M-X of the secondary hadronic system produced in association with an identified lepton. Since B
25.	Abreu, P, et al. (författare) Energy dependence of event shapes and of alpha(s) at LEP 2 1999 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 456:2-4, s. 322-340 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract Infrared and collinear safe event shape distributions and their mean values are determined using the data taken at five different centre of mass energies above M-Z with the DELPHI detector at LEP. From the event shapes, the strong coupling alpha(s) is ext
26.	Abreu, P, et al. (författare) Energy dependence of inclusive spectra in e(+)e(-) annihilation 1999 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 459:1-3, s. 397-411 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract Inclusive charged hadron distributions as obtained from the DELPHI measurements at 130, 136, 161, 172 and 183 GeV are presented as a function of the variables rapidity, xi(p), p and transversal momenta. Data are compared with event generators and with MLL
27.	Abreu, P, et al. (författare) Hadronization properties of b quarks compared to light quarks in e(+)e(-)-> q(q)over-bar from 183 to 200 GeV 2000 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 479:1-3, s. 118-128 Tidskriftsartikel (refereegranskat)abstract 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 192 and 200 GeV during 1999. These data were used to measure the average charge
28.	Abreu, P, et al. (författare) Identified charged particles in quark and gluon jets 2000 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. - 1434-6044. ; 17:2, s. 207-222 Tidskriftsartikel (refereegranskat)abstract A sample of 2.2 million hadronic Z decays, selected from the data recorded by the DELPHI detector at LEP during 1994-1995 was used for an improved measurement of inclusive distributions of pi (+), K+ and p and their antiparticles in gluon and quark jets.
29.	Abreu, P, et al. (författare) Inclusive Sigma(-) and Lambda(1520) production in hadronic Z decays 2000 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 475:3-4, s. 429-447 Tidskriftsartikel (refereegranskat)abstract 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 microvertex detector and is identified by its Sigma --> n pi decay lea
30.	Abreu, P, et al. (författare) Lambda(b) polarization in Z(0) decays at LEP 2000 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 474:1-2, s. 205-222 Tidskriftsartikel (refereegranskat)abstract The longitudinal polarization of the Lambda(b) baryon is measured at the LEP e(+)e(-) collider by DELPHI. It is determined from the charged lepton and neutrino energy spectra in 249 +/- 19 Lambda(b) semileptonic decays reconstructed in approximate to 3.5
31.	Abreu, P, et al. (författare) Limits on the masses of supersymmetric particles at root s=189 GeV 2000 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 489:1-2, s. 38-54 Tidskriftsartikel (refereegranskat)abstract 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 Supersymmetric Particle and other supersymmetric particles within the MSSM framework. R
32.	Abreu, P, et al. (författare) Measurement and interpretation of fermion-pair production at LEP energies from 130 to 172 GeV 1999 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 11:3, s. 383-407 Tidskriftsartikel (refereegranskat)abstract The data collected with the DELPHI detector at centre-of-mass energies between 130 and 172 GeV, during LEP operation in 1995 and 1996, have been used to determine the hadronic and leptonic cross-sections and leptonic forward-backward asymmetries. In addit
33.	Abreu, P, et al. (författare) Measurement and interpretation of fermion-pair production at LEP energies of 183 and 189 GeV 2000 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 485:1-3, s. 45-61 Tidskriftsartikel (refereegranskat)abstract 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 leptonic fermion-pair cross-sections, as well as the leptonic forward-ba
34.	Abreu, P, et al. (författare) Measurement of A(FB)(b(b)over-bar) in hadronic Z decays using a jet charge technique 1999 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 9:3, s. 367-381 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract The bb forward-backward asymmetry has been determined from the average charge how measured in a sample of 3,500,000 hadronic Z decays collected with the DELPHI detector in 1992 - 1995. The measurement is performed in an enriched b (b) over bar sample sele
35.	Abreu, P, et al. (författare) Measurement of inclusive rho(0), f(0)(980), f(2)(1270), K-2(0)(1430) and f '(2)(1525) production in Z(0) decays 1999 Ingår i:* PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 449:3-4, s. 364-382 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract DELPHI results are presented on the inclusive production of the neutral mesons rho(0), f(0)(980), f(2)(1270), K-2(*0)(1430) and f'(2)(1525) in hadronic Z(0) decays. They are based on about 2 million multihadronic events collected in 1994 and 1995, using t
36.	Abreu, P, et al. (författare) Measurement of the (B)over-bar -> D-()pi l(nu)over-bar(l) branching fraction 2000 Ingår i:* PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 475:3-4, s. 407-428 Tidskriftsartikel (refereegranskat)abstract A study of b semileptonic decays into D, D pi(+/-) and Dpi(+/-) final states is presented. The D-0, D+ and D(+) mesons are exclusively reconstructed in Z decay data recorded from 1992 to 1995 in the DELPHI experiment at LEP. The overall branching fracti
37.	Abreu, P, et al. (författare) Measurement of the B-s(0) lifetime and study of B-s(0)-(B-s(0))over-bar oscillations using D(s)l events 2000 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. - 1434-6044. ; 16:4, s. 555-578 Tidskriftsartikel (refereegranskat)abstract Lifetime and oscillations of B-s(0) mesons have been studied in events with a large transverse momentum lepton and a D-s of opposite electric charge in the same hemisphere, selected from about 3.6 million hadronic Z(0) decays accumulated by DELPHI between
38.	Abreu, P, et al. (författare) Measurement of the gluon fragmentation function and a comparison of the scaling violation in gluon and quark jets 2000 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 13:4, s. 573-589 Tidskriftsartikel (refereegranskat)abstract The fragmentation functions of quarks and gluons are measured in Various three-jet topologies in Z decays from the full data set collected with the DELPHI detector at the Z resonance between 1992 and 1995. The results at different values of transverse mom
39.	Abreu, P, et al. (författare) Measurement of the lifetime of b-baryons 1999 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 10:2, s. 185-199 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract The average lifetime of weakly decaying b-baryons was studied using 3.6 million Z(0) hadronic decays collected by the DELPHI detector at LEP. The measurement of the proper decay time distribution of secondary vertices was used on three complementary sampl
40.	Abreu, P, et al. (författare) Measurement of the mass and width of the W boson in e(+)e(-) collisions at root s=189 GeV 2001 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 511:2-4, s. 159-177 Tidskriftsartikel (refereegranskat)abstract A measurement of the FV 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(-1) and an average centre-of-mass energy of 188.6 GeV. Results are obtained
41.	Abreu, P, et al. (författare) Measurement of the mass of the W boson using direct reconstruction at root s=183 GeV 1999 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 462:3-4, s. 410-424 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract From data corresponding to an integrated luminosity of 53.5 pb(-1) taken during the 183 GeV run in 1997, DELPHI has measured the W mass from direct reconstruction of WW --> l<(nu)over bar>q (q) over bar and WW --> q (q) over bar q (q) over bar events. Com
42.	Abreu, P, et al. (författare) Measurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic Z decays and the extraction of the gluon splitting into b(b)over-bar 1999 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 462:3-4, s. 425-439 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract The rate Z --> b (b) over bar b (b) over bar was measured using about 2 x 10(6) hadronic decays collected by the DELPHI experiment in 1994 and 1995. Events were forced into 3-jets with y(min) > 0.06 and a b-tag was required for every jet. The rate was mea
43.	Abreu, P, et al. (författare) Measurement of the semileptonic b branching fractions and average b mixing parameter in Z decays 2001 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. - 1434-6044. ; 20:3, s. 455-478 Tidskriftsartikel (refereegranskat)abstract The semileptonic branching fractions for primary and cascade b decays BR(b --> l(-)), BR(b --> c --> l(+)) and BR(b --> (c) over bar --> l(-) were measured in hadronic Z decays collected by the DELPHI experiment at LEP. The sample was enriched in b decays
44.	Abreu, P, et al. (författare) Measurement of the strange quark forward-backward asymmetry around the Z(0) peak 2000 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 14:4, s. 613-631 Tidskriftsartikel (refereegranskat)abstract A precise measurement of the strange quark forward-backward asymmetry used 3.2 M multihadronic events around the Z(0) peak collected by the DELPHI experiment from 1992 to 1995. The ring imaging Cherenkov detectors in the barrel and end-cap regions identif
45.	Abreu, P, et al. (författare) Measurement of the ZZ cross-section in e(+)e(-) interactions at 183-189 GeV 2001 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 497:3-4, s. 199-213 Tidskriftsartikel (refereegranskat)abstract Measurements of on-shell ZZ production are described, using data collected by DELPHI in 1997 and 1998, at centre-of-mass energies roots = 182.6 GeV and 188.6 GeV, respectively. Results obtained in each of the final states q (q) over barq (q) over bar, mu
46.	Abreu, P, et al. (författare) Measurement of trilinear gauge boson couplings WWV, (V Z,gamma) in e(+)e(-) collisions at 189 GeV 2001 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 502:1-4, s. 9-23 Tidskriftsartikel (refereegranskat)abstract Measurements of the trilinear gauge boson couplings WW gamma and WWZ are presented using the data taken by DELPHI in 1998 at a centre-of-mass energy of 189 GeV and combined with DELPHI data at 183 GeV. Values are determined for Deltag(1)(Z) and Delta kapp
47.	Abreu, P, et al. (författare) Measurement of V-cb from the decay process (B)over-bar(0)-> D(+)l(-)(nu)over-bar 2001 Ingår i:* PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 510:1-4, s. 55-74 Tidskriftsartikel (refereegranskat)abstract A new precise measurement of \V-cb\ and of the branching ratio BR(<(Bover bar>(0)--> D(+)l(-)<()over bar>(l)) has been performed using a sample of about 5000 semileptonic decays (B) over bar (0) --> D(+)l(-)<()over bar>(l), selected by the DELPH
48.	Abreu, P, et al. (författare) Measurements of the leptonic branching fractions of the tau 1999 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 10:2, s. 201-218 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract Data collected with the DELPHI detector from 1993 to 1995 combined with previous DELPHI results for data from 1991 and 1992 yield the branching fractions B(tau --> e nu<(nu)over bar>) = (17.877 +/- 0.109(stat) +/- 0.110(sys))% and B(tau --> mu nu<(nu)over
49.	Abreu, P, et al. (författare) Measurements of the trilinear gauge boson couplings WWV (V equivalent to gamma,Z) in e(+)e(-) collisions at 183 GeV 1999 Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 459:1-3, s. 382-396 Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract Measurements of the trilinear gauge boson couplings WW gamma and WWZ an presented from data taken by DELPHI in 1997 at an energy of 183 GeV. From a study of the reactions e(+)e(-) --> W+W-, e(+)e(-) --> We nu and e(+)e(-) --> nu nu gamma, values are obtai
50.	Abreu, P, et al. (författare) Measurements of the Z partial decay width into c(c)over-bar and multiplicity of charm quarks per b decay 2000 Ingår i: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 12:2, s. 225-241 Tidskriftsartikel (refereegranskat)abstract The partial decay width R-c of the Z into c (c) over bar quark pair and the number of charm quarks n(c) per b decay are measured with the DELPHI detector at LEP 1. Particle identification provides clear DO, D+, D-s(+) and Lambda(c)(+) signatures. The char

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