1. |
- Abreu, P, et al.
(author)
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A measurement of alpha(s) from the scaling violation in e(+)e(-) annihilation
- 1997
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In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 398:1-2, s. 194-206
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Journal article (other academic/artistic)abstract
- The hadronic fragmentation functions of the various quark flavours and of gluons are measured in a study of the inclusive hadron production from Z(0) decays with the DELPHI detector and are compared with the fragmentation functions measured elsewhere at e
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5. |
- Abreu, P, et al.
(author)
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A precise measurement of the B-d(0) meson lifetime using a new technique
- 1997
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In: ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS. - : SPRINGER VERLAG. - 0170-9739. ; 74:1, s. 19-32
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Journal article (other academic/artistic)abstract
- From data recorded by DELPHI between 1991 and 1994, which corresponds to 3.2 million hadronic Z(0) decays, a measurement of the <(B-d(0))over bar> meson lifetime, based on the inclusive reconstruction of 3520 +/- 150 semileptonic decays of the type <(B-d(
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6. |
- Abreu, P, et al.
(author)
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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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7. |
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8. |
- Abreu, P, et al.
(author)
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A search for eta '(c) production in photon-photon fusion at LEP
- 1998
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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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9. |
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10. |
- Abreu, P, et al.
(author)
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A search for invisible Higgs bosons produced in e(+)e(-) interactions at LEP 2 energies
- 1999
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In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 459:1-3, s. 367-381
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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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11. |
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12. |
- Abreu, P, et al.
(author)
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A study of the hadronic resonance structure in the decay tau -> 3 pi nu(tau)
- 1998
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In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 426:3-4, s. 411-427
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Journal article (other academic/artistic)abstract
- The hadronic structure of the decay of the tau lepton to three charged particles, tau --> 3 pi nu(tau), is studied using data collected by the DELPHI detector at LEP between 1992 and 1995. The invariant mass of the 3 pi system, m(3 pi), is fitted using th
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13. |
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14. |
- Abreu, P, et al.
(author)
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An upper limit for Br(Z(0)->ggg) from symmetric 3-jet Z(0) hadronic decays
- 1996
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In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 389:2, s. 405-415
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Journal article (other academic/artistic)abstract
- An upper limit for BR(Z(0) --> 3g) is obtained from a correlation method, which distinguishes statistically between quark and gluon jets by using the difference in their charged particle multiplicity distributions. From the sample of threefold symmetric t
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15. |
- ABREU, P, et al.
(author)
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B-ASTERISK PRODUCTION IN Z-DECAYS
- 1995
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In: ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS. ; 68:3
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Other publication (other academic/artistic)
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16. |
- Abreu, P, et al.
(author)
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Charged particle multiplicity in e(+)e(-) interactions at root s=130 GeV
- 1996
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In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 372:1-2, s. 172-180
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Journal article (other academic/artistic)abstract
- From the data collected by DELPHI at LEP in autumn 1995, the multiplicity of charged particles at a hadronic energy of 130 GeV has been measured to be [n(ch)] = 23.84 +/- 0.51(stat) +/- 0.52(syst), When compared to lower energy data, the value measured is
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18. |
- Abreu, P, et al.
(author)
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Determination of the average lifetime of b-baryons
- 1996
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In: ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS. - : SPRINGER VERLAG. - 0170-9739. ; 71:2, s. 199-210
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Journal article (other academic/artistic)abstract
- The average lifetime of b-baryons has been studied using 3 x 10(6) hadronic Z(0) decays collected by the DELPHI detector at LEP. Three methods have been used, based on the measurement of different observables: the proper decay time distribution of 206 ver
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19. |
- Abreu, P, et al.
(author)
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Determination of vertical bar V-cb vertical bar from the semileptonic decay B-0->D*(-)l(+)nu
- 1996
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In: ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS. - : SPRINGER VERLAG. - 0170-9739. ; 71:4, s. 539-553
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Journal article (other academic/artistic)abstract
- Semileptonic decays B --> D*(-)l(+)nu X were selected from a sample of 3.1 million hadronic Z decays collected by the DELPHI detector at LEP. A topological search for semileptonic B decays to resonant and non-resonant D*(-)pi(+) states was performed and t
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20. |
- Abreu, P, et al.
(author)
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Energy dependence of event shapes and of alpha(s) at LEP 2
- 1999
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In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 456:2-4, s. 322-340
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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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21. |
- Abreu, P, et al.
(author)
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Energy dependence of inclusive spectra in e(+)e(-) annihilation
- 1999
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In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 459:1-3, s. 397-411
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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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22. |
- Abreu, P, et al.
(author)
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Energy dependence of the differences between the quark and gluon jet fragmentation
- 1996
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In: ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS. - : SPRINGER VERLAG. - 0170-9739. ; 70:2, s. 179-195
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Journal article (other academic/artistic)abstract
- Three jet events arising from decays of the Z beson, collected by the DELPHI detector, were used to measure differences in quark and gluon fragmentation. Gluon jets were anti-tagged by identifying b quark jets. Unbiased quark jets came from events with tw
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23. |
- Abreu, P, et al.
(author)
-
First evidence for a charm radial excitation, D-*'
- 1998
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In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 426:1-2, s. 231-242
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Journal article (other academic/artistic)abstract
- Using D*+ mesons exclusively reconstructed in the DELPHI detector at LEP, an excess of 66 +/- 14(stat.) events is observed in the D(*+)pi(+)pi(-) final state with a mass of 2637 +/- 2(stat.) +/- 6(syst.) MeV/c(2) and a full width smaller than 15 MeV/c(2)
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24. |
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25. |
- Abreu, P, et al.
(author)
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First measurement of f'(2)(1525) production in Z(0) hadronic decays
- 1996
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In: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 379:1-4, s. 309-318
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Journal article (other academic/artistic)abstract
- The inclusive production of the f(2)'(1525) in hadronic Z(0) decays has been studied in data collected by the DELPHI detector at LEP. The Ring Imaging Cherenkov detectors were important tools in the identification of the decay f(2)'(1525) --> K+K-. The av
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