Search Results - "Engblom, P. Thörngren"
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Two-pion production in proton–proton collisions — experimental total cross sections and their isospin decomposition
Published in Physics letters. B (10-08-2009)“…The two-pion production in pp-collisions has been investigated at CELSIUS in exclusive measurements from threshold up to Tp=1.36 GeV. Total and differential…”
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Excitation of the Roper resonance in single- and double-pion production in nucleon-nucleon collisions
Published in The European physical journal. A, Hadrons and nuclei (01-03-2008)“… In most investigations the Roper resonance is sensed only very indirectly via complex partial-wave analyses. We find indications for its excitation in the…”
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Measuring the polarization of a rapidly precessing deuteron beam
Published in Physical review special topics. PRST-AB. Accelerators and beams (28-05-2014)“…This paper describes a time-marking system that enables a measurement of the in-plane (horizontal) polarization of a 0.97-GeV/c deuteron beam circulating in…”
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Connection between zero chromaticity and long in-plane polarization lifetime in a magnetic storage ring
Published in Physical review. Accelerators and beams (01-02-2018)“…In this paper, we demonstrate the connection between a magnetic storage ring with additional sextupole fields set so that thexandychromaticities vanish and the…”
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Low-energy spin-physics experiments with polarized beams and targets at the COSY storage ring
Published in EPJ techniques and instrumentation (16-08-2019)“…A low-energy spin-physics program is being developed at the COSY storage ring. To support the planned experimental activities, several experimental tools for…”
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Exclusive measurement of the pp → nnπ+π+ reaction at 1.1 GeV
Published in The European physical journal. A, Hadrons and nuclei (01-09-2011)“…First exclusive data for the reaction have been obtained at CELSIUS with the WASA detector setup at a beam energy of T p = 1.1 GeV. Total and differential…”
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Faddeev Calculations of Breakup Reactions with Realistic Experimental Constraints
Published in Few-body systems (01-06-2004)“…We present a method to integrate predictions from a theoretical model of a reaction with three bodies in the final state over the region of phase space covered…”
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Axial observables in d-->p--> breakup and the three-nucleon force
Published in Physical review letters (10-09-2004)“…We have measured three axial polarization observables in d-->p--> breakup with a polarized 270 MeV deuteron beam on a polarized proton target. Axial…”
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Analyzing powers and spin correlation coefficients for p + d elastic scattering at 135 and 200 MeV
Published in Physical review. C, Nuclear physics (2006)“…The proton and deuteron analyzing powers and ten of the possible 12 spin correlation coefficients have been measured for p+d elastic scattering at proton…”
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The WASA detector facility at CELSIUS
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (11-09-2008)“…The WASA 4 π multidetector system, aimed at investigating light meson production in light ion collisions and η meson rare decays at the CELSIUS storage ring in…”
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A small size zero-degree spectrometer with germanium detectors
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-05-1997)“…A small size spectrometer for detecting heavy reaction products emitted at small angles has been developed. It is installed at the synchrotron storage ring…”
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Double-pionic fusion of nuclear systems and the "ABC" effect: approaching a puzzle by exclusive and kinematically complete measurements
Published in Physical review letters (06-02-2009)“…The ABC effect-a puzzling low-mass enhancement in the pipi invariant mass spectrum, first observed by Abashian, Booth, and Crowe-is well known from inclusive…”
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New experimental upper limit of the electron–proton spin-flip cross-section
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (21-09-2014)“…In a previous publication, measurements of the depolarization of a stored proton beam by interaction with a co-propagating unpolarized electron beam at low…”
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14
Observation of a large longitudinal analyzing power in a nuclear reaction
Published in Physics letters. B (2000)“…We have measured the longitudinal analyzing power A z of the pp→pp π 0 reaction at 375 MeV bombarding energy. We find that for certain angle combinations of…”
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η -meson production in proton-proton collisions at excess energies of 40 and 72 MeV
Published in Physical review. C, Nuclear physics (30-11-2010)“…The production of eta mesons in proton-proton collisions has been studied using the WASA detector at the CELSIUS storage ring at excess energies of Q = 40 MeV…”
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Phase Measurement for Driven Spin Oscillations in a Storage Ring
Published 24-04-2018“…Phys. Rev. Accel. Beams 21, 042002 (2018) This paper reports the first simultaneous measurement of the horizontal and vertical components of the polarization…”
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Kinematically Complete Measurement of the pd → pdη Reaction
Published in Physica scripta (01-01-2003)Get full text
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Phase locking the spin precession in a storage ring
Published 06-07-2017“…Phys. Rev. Lett. 119, 014801 (2017) This letter reports the successful use of feedback from a spin polarization measurement to the revolution frequency of a…”
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Spin tune mapping as a novel tool to probe the spin dynamics in storage rings
Published 08-03-2017“…Phys. Rev. Accel. Beams 20, 072801 (2017) Precision experiments, such as the search for electric dipole moments of charged particles using storage rings,…”
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Measurement of the η→π+π−e+e− decay branching ratio
Published in Physics letters. B (25-01-2007)“…The reaction pd→He3η at threshold was used to provide a clean source of η mesons for decay studies with the WASA detector at CELSIUS. The branching ratio of…”
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