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S. O. Holmgren

Researcher at Stockholm University

Publications -  522
Citations -  43937

S. O. Holmgren is an academic researcher from Stockholm University. The author has contributed to research in topics: Large Hadron Collider & Lepton. The author has an hindex of 90, co-authored 522 publications receiving 42285 citations.

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Search for R-parity violation with a (U)over-bar(D)over-bar(D)over-bar coupling at root s approximate to 189 GeV

P. Abreu, +507 more
- 15 Feb 2001 - 
TL;DR: In this article, pair production of gauginos and squarks in e+e collisions at a centre-of-mass energy of 189 GeV have been performed on data corresponding to an integrated luminosity of 158 pb^{-1} collected by the DELPHI detector at LEP.
Journal ArticleDOI

Anode wire ageing in proportional counters: the problem of analog response

TL;DR: In this article, the analog response of proportional counters is determined by the local charge density distribution on an insulating sense-wire surface, which depends on a number of parameters such as spatial distribution of irradiation, counting rate, gas gain and surface conductivity of the insulating layer.
Journal ArticleDOI

First evidence of hard scattering processes in single tagged gamma gamma collisions

P. Abreu, +578 more
- 12 Jan 1995 - 
TL;DR: For the first time, multihadronic production from single tagged γγ collisions has been studied, where one of the scattered leptons was tagged at very low virtual photon absolute mass squared (〈Q2〉 = 0.06 (GeV/c2)2) as mentioned in this paper.
Journal ArticleDOI

Charged kaon production in tau decays at LEP

P. Abreu, +642 more
- 18 Aug 1994 - 
TL;DR: In this article, the DELPHI detector at the LEP collider has been used to identify charged kaons over a large momentum range by the barrel ring imaging Cherenkov detector.
Journal ArticleDOI

Lifetime and Production-rate of Beauty Baryons From Z-decays

P. Abreu, +550 more
TL;DR: The production and decay of beauty baryons (b-baryons) have been studied using 1.7×106 Z hadronic decays collected by the DELPHI detector at LEP as mentioned in this paper.