Imad Laktineh

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We report on measurements of hadronic and leptonic cross sections and leptonic forwardbackward asymmetries performed with the L3 detector in the years 1993–95. A total luminosity of 103 pb−1 was collected at centre-of-mass energies √ s ≈ mZ and √s ≈ mZ±1.8 GeV which corresponds to 2.5 million hadronic and 245 thousand leptonic events selected. These data(More)
New methods for efficient and unambiguous interconnection between electronic counters and target units based on nuclear photographic emulsion films have been developed. The application to the OPERA experiment, that aims at detecting νμ ⇋ ντ oscillations in the CNGS neutrino beam, is reported in this paper. In order to reduce background due to latent tracks(More)
Three jet events arising from decays of the Z boson, 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 two jets plus one photon. Quark and gluon jet properties in different energy ranges were compared for the(More)
The Semi-Digital Hadronic CALorimeter (SD-HCAL) is one of the two hadronic calorimeter options proposed by the International Large Detector (ILD) project for the future International Linear Collider experiments (ILC). It is a sampling calorimeter with 48 Glass Resistive Plate Chambers (GRPCs) finely segmented into cells of 1 cm2 ensuring a high granularity(More)
The measurement of the correlation between the transverse spin components of + ? pairs collected during 1992 to 1994 with the DELPHI detector at LEP1 is presented. A value ? 0:12 (syst.) was obtained for the correlation parameter, in agreement with the Standard Model expectation.
An update of the searches for charginos and neutralinos in DELPHI is presented, based mainly on recent data collected at centre-of-mass energies of 161 GeV and 172 GeV. No signal is found. For a sneutrino with mass above 300 GeV/c and a mass di erence between the chargino and the lightest neutralino above 10 GeV/c, the lower limit at 95% con dence level on(More)
The fragmentation probabilities into D s meson of charm and beauty quarks produced from the Z 0 decay are measured using the inclusive analysis of D s meson through two of its decay channels the , and the K K. The method relies on the diierence of momentum shape between the D s resulting from the charm quark fragmentation and those of the beauty mesons(More)
  • iiP . Abreu, Wahib Adam, +464 authors A . Tilquin
  • 2007
The transverse, longitudinal and asymmetric components of the fragmentation function are measured from the inclusive charged particles produced in e + e ? collisions at LEP. As in deep inelastic scattering, these data are important for tests of QCD. The transverse T and longitudinal L components of the total hadronic cross section tot are evaluated from the(More)
The spin density matrix elements for the 0 , K 0 (892) and produced in hadronic Z 0 decays are measured in the DELPHI detector. There is no evidence for spin alignment of the K 0 (892) and in the region x p 0:3 (x p = p=p beam), where 00 = 0:330:05 and 00 = 0:300:04, respectively. In the fragmentation region, x p 0:4, there is some indication for spin(More)