1. |
- Abreau, P, et al.
(author)
-
Photon events with missing energy at root s=183 to 189 GeV
- 2000
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In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. - 1434-6044. ; 17:1, s. 53-65
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Journal article (peer-reviewed)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
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2. |
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3. |
- Abreu, P, et al.
(author)
-
A measurement of the Tau topological branching ratios
- 2001
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In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. - 1434-6044. ; 20:4, s. 617-637
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Journal article (peer-reviewed)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)(-)
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4. |
- Abreu, P, et al.
(author)
-
A precise measurement of the partial decay width ratio R-b(0) = Gamma(b(b)over-bar)/Gamma(had)
- 1999
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In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 10:3, s. 415-442
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Journal article (other academic/artistic)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
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5. |
- Abreu, P, et al.
(author)
-
A precise measurement of the tau polarisation at LEP-1
- 2000
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In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 14:4, s. 585-611
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Journal article (peer-reviewed)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
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6. |
- Abreu, P, et al.
(author)
-
A search for eta '(c) production in photon-photon fusion at LEP
- 1998
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 441:1-4, s. 479-490
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Journal article (other academic/artistic)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.
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7. |
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8. |
- Abreu, P, et al.
(author)
-
A search for invisible Higgs bosons produced in e(+)e(-) interactions at LEP 2 energies
- 1999
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 459:1-3, s. 367-381
-
Journal article (other academic/artistic)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
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9. |
- Abreu, P, et al.
(author)
-
A study of the Lorentz structure in tau decays
- 2000
-
In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. - 1434-6044. ; 16:2, s. 229-252
-
Journal article (peer-reviewed)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(-)
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10. |
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11. |
- Abreu, P, et al.
(author)
-
Consistent measurements of alpha(s) from precise oriented event shape distributions
- 2000
-
In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 14:4, s. 557-584
-
Journal article (peer-reviewed)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
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12. |
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13. |
- Abreu, P, et al.
(author)
-
Cross-sections and leptonic forward-backward asymmetries from the Z(0) running of LEP
- 2000
-
In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. - 1434-6044. ; 16:3, s. 371-405
-
Journal article (peer-reviewed)abstract
- During 1993 and 1995 LEP was run at 3 energies near the Z(0) peak in order to give improved measurements of the mass and width of the resonance. During 1994, LEP operated only at the Z(0) peak. In total DELPHI accumulated data corresponding to an integrat
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14. |
- Abreu, P, et al.
(author)
-
Determination of P(c -> D*(+)) and BR(c -> l(+)) at LEP 1
- 2000
-
In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 12:2, s. 209-224
-
Journal article (peer-reviewed)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
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15. |
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16. |
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17. |
- Abreu, P, et al.
(author)
-
Energy dependence of event shapes and of alpha(s) at LEP 2
- 1999
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 456:2-4, s. 322-340
-
Journal article (other academic/artistic)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
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18. |
- Abreu, P, et al.
(author)
-
Energy dependence of inclusive spectra in e(+)e(-) annihilation
- 1999
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 459:1-3, s. 397-411
-
Journal article (other academic/artistic)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
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19. |
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20. |
- Abreu, P, et al.
(author)
-
Identified charged particles in quark and gluon jets
- 2000
-
In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER-VERLAG. - 1434-6044. ; 17:2, s. 207-222
-
Journal article (peer-reviewed)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.
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21. |
- Abreu, P, et al.
(author)
-
Inclusive Sigma(-) and Lambda(1520) production in hadronic Z decays
- 2000
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 475:3-4, s. 429-447
-
Journal article (peer-reviewed)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
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22. |
- Abreu, P, et al.
(author)
-
Lambda(b) polarization in Z(0) decays at LEP
- 2000
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 474:1-2, s. 205-222
-
Journal article (peer-reviewed)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
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23. |
- Abreu, P, et al.
(author)
-
Limits on the masses of supersymmetric particles at root s=189 GeV
- 2000
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 489:1-2, s. 38-54
-
Journal article (peer-reviewed)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
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24. |
- Abreu, P, et al.
(author)
-
Measurement and interpretation of fermion-pair production at LEP energies from 130 to 172 GeV
- 1999
-
In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 11:3, s. 383-407
-
Journal article (peer-reviewed)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
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25. |
- Abreu, P, et al.
(author)
-
Measurement and interpretation of fermion-pair production at LEP energies of 183 and 189 GeV
- 2000
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 485:1-3, s. 45-61
-
Journal article (peer-reviewed)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
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26. |
- Abreu, P, et al.
(author)
-
Measurement of A(FB)(b(b)over-bar) in hadronic Z decays using a jet charge technique
- 1999
-
In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 9:3, s. 367-381
-
Journal article (other academic/artistic)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
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27. |
- Abreu, P, et al.
(author)
-
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
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 449:3-4, s. 364-382
-
Journal article (other academic/artistic)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
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28. |
- Abreu, P, et al.
(author)
-
Measurement of the (B)over-bar -> D-(*)pi l(nu)over-bar(l) branching fraction
- 2000
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 475:3-4, s. 407-428
-
Journal article (peer-reviewed)abstract
- A study of b semileptonic decays into D, D pi(+/-) and D*pi(+/-) 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
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29. |
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30. |
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31. |
- Abreu, P, et al.
(author)
-
Measurement of the lifetime of b-baryons
- 1999
-
In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 10:2, s. 185-199
-
Journal article (other academic/artistic)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
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32. |
- Abreu, P, et al.
(author)
-
Measurement of the mass and width of the W boson in e(+)e(-) collisions at root s=189 GeV
- 2001
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 511:2-4, s. 159-177
-
Journal article (peer-reviewed)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
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33. |
- Abreu, P, et al.
(author)
-
Measurement of the mass of the W boson using direct reconstruction at root s=183 GeV
- 1999
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 462:3-4, s. 410-424
-
Journal article (other academic/artistic)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
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34. |
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35. |
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36. |
- Abreu, P, et al.
(author)
-
Measurement of the strange quark forward-backward asymmetry around the Z(0) peak
- 2000
-
In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 14:4, s. 613-631
-
Journal article (peer-reviewed)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
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37. |
- Abreu, P, et al.
(author)
-
Measurement of the ZZ cross-section in e(+)e(-) interactions at 183-189 GeV
- 2001
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 497:3-4, s. 199-213
-
Journal article (peer-reviewed)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
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38. |
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39. |
- Abreu, P, et al.
(author)
-
Measurement of V-cb from the decay process (B)over-bar(0)-> D(*+)l(-)(nu)over-bar
- 2001
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 510:1-4, s. 55-74
-
Journal article (peer-reviewed)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
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40. |
- Abreu, P, et al.
(author)
-
Measurement of vertical bar V-cs vertical bar using W decays at LEP2
- 1998
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 439:1-2, s. 209-224
-
Journal article (other academic/artistic)abstract
- Decays of W+/- bosons, produced at LEP2, have been used to measure the \V-cs\ element of the Cabibbo-Kobayashi-Maskawa matrix. Values for \V-cs\ were extracted both from the measured hadronic branching ratio of W+/- decays and by tagging the flavour of ha
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41. |
- Abreu, P, et al.
(author)
-
Measurements of the leptonic branching fractions of the tau
- 1999
-
In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 10:2, s. 201-218
-
Journal article (other academic/artistic)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
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42. |
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43. |
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44. |
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45. |
- Abreu, P, et al.
(author)
-
pi(+/-), K-+/-, p and (p)over-bar production in Z(0)-> q(q)over-bar, Z(0)-> b(b)over-bar, Z(0)-> u(u)over-bar,d(d)over-bar,s(s)over-bar
- 1998
-
In: EUROPEAN PHYSICAL JOURNAL C. - : SPRINGER VERLAG. - 1434-6044. ; 5:4, s. 585-620
-
Journal article (other academic/artistic)abstract
- The DELPHI experiment at LEP uses Ring Imaging Cherenkov detectors for particle identification. The good understanding of the RICH detectors allows the identification of charged pions, kaons and protons, covering the full momentum range from 0.7 < p < 45.
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46. |
- Abreu, P, et al.
(author)
-
Rapidity-rank structure of p(p)over-bar pairs in hadronic Z(0) decays
- 2000
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 490:1-2, s. 61-70
-
Journal article (peer-reviewed)abstract
- The rapidity-rank structure of pa pairs is used to analyze the mechanism of baryon production in hadronic Z(0) decay. The relative occurrence of the rapidity-ordered configuration p M p, where M is a meson, and that of pp adjacent pairs is compared. The d
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47. |
- Abreu, P, et al.
(author)
-
Search for a fermiophobic Higgs at LEP 2
- 2001
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 507:1-4, s. 89-103
-
Journal article (peer-reviewed)abstract
- Higgs bosons predicted by the fermiophobic scenario within Two Higgs Doublers Models were searched for in the data collected by the DELPHI detector at centre-of-mass energies between 189 GeV and 202 GeV, corresponding to a total integrated luminosity of 3
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48. |
- Abreu, P, et al.
(author)
-
Search for charged Higgs bosons at LEP 2
- 1999
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 460:3-4, s. 484-497
-
Journal article (other academic/artistic)abstract
- A search for pair produced charged Higgs bosons has been performed in the high energy data collected by DELPHI at LEP with root s = 161, 172 and 183 GeV. The analysis uses the tau nu tau nu, c (s) over bar tau nu and c<(sc)over bar>s final states and a co
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49. |
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50. |
- Abreu, P, et al.
(author)
-
Search for charginos in e(+)e(-) interactions at root s=189 GeV
- 2000
-
In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 479:1-3, s. 129-143
-
Journal article (peer-reviewed)abstract
- 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-mass energy of 189 GeV. No evidence for a signal was found. The lower mass
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