Scaling in the semi-inclusive reactions K+p → K♀n (charged) + anything at 5, 8.2 and 16 GeV/c

We study the scaling properties of the semi-inclusive reactions K+p → K0 + n (charged) + X0 (neutral) measuring the momentum spectra of K0-mesons for a given number of prongs n. Distributions of the particle density ω(dσn/dpL)/σn for the inclusive K0 at n = 2 and n = 4 show evidence for limited scaling at 5.0, 8.2 and 16 GeV/c incident K+ momenta. © 1972.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Inclusive φ production in K+p interactions at 70 GeV/c

We present results on inclusive φ meson production in K+p interactions at 70 GeV/c in the kaon fragmentation x>0.2 region. Comparison with other data on φ meson production in K± and p induced reactions provides evidence that the strange valence-quark fragmentation or recombination processes play the dominant role in the K±→φ transitions. Arguments are presented that the kaon valence strange s-quark carries a much higher momentum fraction than the u-quark. Evidence for the previously observed narrow φπ+ state at mass ∼2.1 GeV is discussed. © 1982.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

MEASUREMENT OF THE MASS AND WIDTH OF THE Z0 PARTICLE FROM MULTI - HADRONIC FINAL STATES PRODUCED IN e+ e- ANNIHILATIONS

First measurements of the mass and width of the Z0 performed at the newly commissioned LEP Collider by the DELPHI Collaboration are presented. The measuements are derived from the study of multihadronic final states produced in e+e- annihilations at several energies around the Z0 mass. The values found for the mass and width are M(Z0)=91.06±0.09 (stat) ±0.045 (syst.) GeV and Γ(Z0)=2.42±0.21 (stat.) GeV respectively, froma three-parameter fit to the line shape. A two-parameter fit in the framework of the standard model yields for the number of light neutrino species Nν=2.4±0.4 (stat.) ±0.5 (syst.)0SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Search for the standard model Higgs boson at LEP

The four LEP Collaborations, ALEPH, DELPHI, L3 and OPAL, have collected a total of 2461 pb(-1) of e(+)e(-) collision data at centre-of-mass energies between 189 and 209 GeV. The data are used to search for the Standard Model Higgs boson. The search results of the four Collaborations are combined and examined in a likelihood test for their consistency with two hypotheses: the background hypothesis and the signal plus background hypothesis. The corresponding confidences have been computed as functions of the hypothetical Higgs boson mass. A lower bound of 114.4 GeV/c(2) is established, at the 95% confidence level, on the mass of the Standard Model Higgs boson. The LEP data are also used to set upper bounds on the HZZ coupling for various assumptions concerning the decay of the Higgs boson. (C) 2003 Elsevier B.V. All rights reserved