SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Kjaer M.) ;pers:(Baubillier M.);pers:(Asman B.);pers:(Bouquet B.)"

Sökning: WFRF:(Kjaer M.) > Baubillier M. > Asman B. > Bouquet B.

  • Resultat 51-58 av 58
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
51.
  • 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.
  •  
52.
  • Abdallah, J, et al. (författare)
  • Search for resonant (nu)over-tilde production at root s=183 to 208 GeV
  • 2003
  • Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 28:1, s. 15-26
  • Tidskriftsartikel (refereegranskat)abstract
    • Searches for resonant (ν) over tilde production in e(+)e(-) collisions under the assumption that R-parity is not conserved and that the dominant R-parity violating coupling is lambda(121) or lambda(131) used data recorded by DELPHI in 1997 to 2000 at centre-of-mass energies of 183 to 208 GeV. No deviation from the Standard Model was observed. Upper limits are given for the lambda(121) and lambda(131) couplings as a function of the sneutrino mass and total width. The limits are especially stringent for sneutrino masses equal to the centre-of-mass energies with the highest integrated luminosities recorded.
  •  
53.
  • 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.
  •  
54.
  • 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.
  •  
55.
  • Abdallah, J, et al. (författare)
  • Production of Xi(0)(c) and Xi(b) in Z decays and lifetime measurement of Xi(b)
  • 2005
  • Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; C:44, s. 299-309
  • Tidskriftsartikel (refereegranskat)abstract
    • The charmed strange baryon Xi(c)(0) was searched for in the decay channel Xi(c)(0) -> Xi(-)pi(+), and the beauty strange baryon Xi(b) in the inclusive channel Xi(b) -> Xi(-)l(-)(nu) over barX, using the 3.5 million hadronic Z events collected by the DELPHI experiment in the years 1992-1995. The Xi(-) was reconstructed through the decay AT, using a constrained fit method for cascade decays. An iterative discriminant analysis was used for the Xi(c)(0) and Xi(b) selection. The production rates were measured to be f(Xi c)(0) x BR(Xi(c)(0) -> Xi(-)pi(+) = (4.7 +/- 1.4(stat.) +/- 1.1(syst.)) x 10(-4) per hadronic Z decay, and BR(b -> Xi(b))xBR(Xi(b) -> Xi(-)l(-)X) = (3.0 +/- 1.0(stat.) +/- 0.3(syst.)) x 10(-4) for each lepton species (electron or muon). The lifetime of the Xi(b) baryon was measured to be tau(Xi b) = 1.45(-0.43)(+0.55)(stat.)+/- 0.13(syst.) ps. A combination with the previous DELPHI lifetime measurement gives tau(Xi b) = 1.48(-0.31)(+0.40)(stat.)+/- 0.12(syst.) ps.
  •  
56.
  • Abdallah, J, et al. (författare)
  • Search for single top production via FCNC at LEP at root s=189-208 GeV
  • 2004
  • Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 590:1-2, s. 21-34
  • Tidskriftsartikel (refereegranskat)abstract
    • A search for single top production (e(+)e(-) --> t (c) over bar) via flavour changing neutral currents (FCNC) was performed using the data taken by the DELPHI detector at LEP2. The data analyzed have been accumulated at center-of-mass energies ranging from 189 to 208 GeV. Limits at 95% confidence level were obtained on the anomalous coupling parameters kappa(gamma) and kappa(Z). (C) 2004 Published by Elsevier B.V.
  •  
57.
  • Abdallah, J, et al. (författare)
  • Charged particle multiplicity in three-jet events and two-gluon systems
  • 2005
  • Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; C:44, s. 311-331
  • Tidskriftsartikel (refereegranskat)abstract
    • The charged particle multiplicity in hadronic three-jet events from Z decays is investigated. The topology dependence of the event multiplicity is found to be well described by a modified leading logarithmic prediction. A parameter fit of the prediction to the data yields a measurement of the colour factor ratio C-A/C-F with the result C-A/C-F = 2.261 +/- 0.014(stat). +/- 0.036(exp). +/- 0-066(theo). in agreement with the SU(3) expectation of QCD. The quark-related contribution to the event multiplicity is subtracted from the three-jet event multiplicity resulting in a measurement of the multiplicity of two-gluon colour-singlet states over a wide energy range. The ratios r = N-gg(s)/Ng (g) over bar (s) of the gluon and quark multiplicities and r((1)) = N'(gg)(s)/N'g (g) over bar (s) of their derivatives are compared with perturbative calculations. While a good agreement between calculations and data is observed for r((1)), larger deviations are found for r indicating that non-perturbative effects are more important for r than for r((1)).
  •  
58.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 51-58 av 58
Typ av publikation
tidskriftsartikel (56)
forskningsöversikt (2)
Typ av innehåll
refereegranskat (58)
Författare/redaktör
Andreazza, A. (58)
Baroncelli, A. (58)
Benekos, N. (58)
Besson, N. (58)
Canale, V. (58)
Eigen, G. (58)
visa fler...
Elsing, M. (58)
Fassouliotis, D. (58)
Fuster, J. (58)
Garcia, C. (58)
Graziani, E. (58)
Hamacher, K. (58)
Haug, S. (58)
Leitner, R. (58)
Liebig, W. (58)
Lipniacka, A. (58)
Maltezos, S. (58)
Joram, C. (58)
Katsoufis, E. (58)
Castro, N. (58)
Liko, D. (58)
Cuevas, J. (58)
Feindt, M. (58)
Arnoud, Y. (58)
Borisov, G. (58)
Carena, F. (58)
Bertrand, D. (58)
Bloch, D (58)
Adam, W. (58)
Adzic, P. (58)
Allmendinger, T. (58)
Amaldi, U. (58)
Amato, S. (58)
Anashkin, E. (58)
Andringa, S. (58)
Baillon, P. (58)
Ballestrero, A. (58)
Bambade, P. (58)
Bardin, D. (58)
Benvenuti, A. (58)
Berat, C. (58)
Berggren, M. (58)
Bracko, M. (58)
Camporesi, T. (58)
Cavallo, F. (58)
Chapkin, M. (58)
Checchia, P. (58)
visa färre...
Lärosäte
Lunds universitet (53)
Uppsala universitet (14)
Stockholms universitet (8)
Kungliga Tekniska Högskolan (1)
Språk
Engelska (58)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (58)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy