Author
Kjell Fransson
Other affiliations: Forschungszentrum Jülich, University of Bonn
Bio: Kjell Fransson is an academic researcher from Uppsala University. The author has contributed to research in topics: Meson & Pion. The author has an hindex of 36, co-authored 178 publications receiving 4056 citations. Previous affiliations of Kjell Fransson include Forschungszentrum Jülich & University of Bonn.
Topics: Meson, Pion, Cryomodule, Electron–positron annihilation, Detector
Papers published on a yearly basis
Papers
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01 Jan 1991-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: The DELPHI detector as discussed by the authors is a 4π detector with emphasis on particle identification, three-dimensional information, high granularity and precise vertex determination, which is used at the large electron positron collider (LEP) at CERN.
Abstract: DELPHI is a 4π detector with emphasis on particle identification, three-dimensional information, high granularity and precise vertex determination. The design criteria, the construction of the detector and the performance during the first year of operation at the large electron positron collider (LEP) at CERN are described.
419 citations
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TL;DR: An exclusive and kinematically complete high-statistics measurement of the basic double-pionic fusion reaction pn→dπ( 0)π(0) over the full energy region of the ABC effect reveals a pronounced low-mass enhancement in the ππ-invariant mass spectrum.
Abstract: We report on an exclusive and kinematically complete high-statistics measurement of the basic double-pionic fusion reaction pn -> d pi(0)pi(0) over the full energy region of the ABC effect, a pr ...
194 citations
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TL;DR: The first exclusive and kinematically complete measurements of the most basic double-pionic fusion reaction pn-->dpi; {0}pi;{0} at beam energies of 1.03 and 1.35 GeV reveal the ABC effect to be a (pipi)_{I=L=0} channel phenomenon associated with both a resonancelike energy dependence in the integral cross section and the formation of a DeltaDelta system in the intermediate state.
Abstract: The ABC effect-a puzzling low-mass enhancement in the pi pi invariant mass spectrum, first observed by Abashian, Booth, and Crowe-is well known from inclusive measurements of two-pion production in ...
164 citations
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Uppsala University1, Jagiellonian University2, University of Tübingen3, University of Münster4, Indian Institutes of Technology5, University of Düsseldorf6, Forschungszentrum Jülich7, Ruhr University Bochum8, University of Erlangen-Nuremberg9, University of Giessen10, RWTH Aachen University11, Petersburg Nuclear Physics Institute12, Joint Institute for Nuclear Research13, University of Silesia in Katowice14, Polish Academy of Sciences15, KEK16, George Washington University17
TL;DR: In this article, high-statistics measurements of quasifree polarized (n) over right arrowp scattering have been performed in the energy region of the narrow resonancelike struct...
Abstract: Exclusive and kinematically complete high-statistics measurements of quasifree polarized (n) over right arrowp scattering have been performed in the energy region of the narrow resonancelike struct ...
162 citations
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TL;DR: The first measurements of the mass and width of the Z 0 at the DELPHI Collaboration at the LEP Collider were presented in this article, where the authors derived the measurements from the multihadronic final states produced in e + e − annihilations at several energies around the 0 mass.
147 citations
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TL;DR: The Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC) at CERN as mentioned in this paper was designed to study proton-proton (and lead-lead) collisions at a centre-of-mass energy of 14 TeV (5.5 TeV nucleon-nucleon) and at luminosities up to 10(34)cm(-2)s(-1)
Abstract: The Compact Muon Solenoid (CMS) detector is described. The detector operates at the Large Hadron Collider (LHC) at CERN. It was conceived to study proton-proton (and lead-lead) collisions at a centre-of-mass energy of 14 TeV (5.5 TeV nucleon-nucleon) and at luminosities up to 10(34)cm(-2)s(-1) (10(27)cm(-2)s(-1)). At the core of the CMS detector sits a high-magnetic-field and large-bore superconducting solenoid surrounding an all-silicon pixel and strip tracker, a lead-tungstate scintillating-crystals electromagnetic calorimeter, and a brass-scintillator sampling hadron calorimeter. The iron yoke of the flux-return is instrumented with four stations of muon detectors covering most of the 4 pi solid angle. Forward sampling calorimeters extend the pseudo-rapidity coverage to high values (vertical bar eta vertical bar <= 5) assuring very good hermeticity. The overall dimensions of the CMS detector are a length of 21.6 m, a diameter of 14.6 m and a total weight of 12500 t.
5,193 citations
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TL;DR: In this article, the nuclear forces can be derived using effective chiral Lagrangians consistent with the symmetries of QCD, and the status of the calculations for two and three nucleon forces and their applications in few-nucleon systems are reviewed.
Abstract: Nuclear forces can be systematically derived using effective chiral Lagrangians consistent with the symmetries of QCD. I review the status of the calculations for two- and three-nucleon forces and their applications in few-nucleon systems. I also address issues like the quark mass dependence of the nuclear forces and resonance saturation for four-nucleon operators.
1,455 citations
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TL;DR: In this paper, the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP are reported.
1,381 citations
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TL;DR: The results of the searches for the Higgs boson made by the 4 LEP experiments in data between 161 and 172GeV are presented in this paper, which gives an improved mass limit of 77GeV/c2.
1,325 citations
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TL;DR: In this paper, the DELPHI Collaboration data was used to show that in the minimal non-supersymmetric standard model with one Higgs doublet a single unification point is excluded by more than 7 standard deviations.
1,114 citations