661. |
- Abreu, P, et al.
(författare)
-
A search for invisible Higgs bosons produced in e(+)e(-) interactions at LEP 2 energies
- 1999
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Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 459:1-3, s. 367-381
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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
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662. |
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663. |
- 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(-)
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664. |
- Abreu, P, et al.
(författare)
-
An upper limit for Br(Z(0)->ggg) from symmetric 3-jet Z(0) hadronic decays
- 1996
-
Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 389:2, s. 405-415
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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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665. |
- ABREU, P, et al.
(författare)
-
B-ASTERISK PRODUCTION IN Z-DECAYS
- 1995
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Ingår i: ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS. ; 68:3
-
Annan publikation (övrigt vetenskapligt/konstnärligt)
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666. |
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667. |
- Abreu, P, et al.
(författare)
-
Charged particle multiplicity in e(+)e(-) interactions at root s=130 GeV
- 1996
-
Ingår i: PHYSICS LETTERS B. - : ELSEVIER SCIENCE BV. - 0370-2693. ; 372:1-2, s. 172-180
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)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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668. |
- 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
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669. |
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670. |
- 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
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