92 Result(s)
within
English
Physics
Elementary Particles, Quantum Field Theory
M. Jung
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Article
Differential cross sections of proton compton scattering at photon laboratory energies between 700 and 1000 MeV
Differential cross sections of proton Compton scattering have been measured at the Bonn 2.5 GeV synchrotron. 78 data points are presented as angular distributions at photon lab energies of 700, 750, 800, 850, ...
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Article
Further evidence for photoproduction of charmedF-mesons
Further experimental evidence is given for theF meson through its decay into η′s. Results are presented for the decay channels ηπ±, ηπ0π± and ηπ+π−π±, and confirm those obtained in a previous experiment.
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Article
Differential cross sections of proton compton scattering at photon laboratory energies between 1.2 and 1.7 GeV
Differential cross sections of proton Compton scattering have been measured at the Bonn 2.5 GeV synchrotron. The experiment covers photon laboratory energies between 1.2 GeV and 1.7 GeV and the square of the f...
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Article
Photoproduction of multiparticle states in the beam fragmentation region for photon energies in the range 50–70 GeV
Forward production of hadrons in γp interactions at about 11 GeV centre of mass energy has been analysed in terms of single particle spectra. Comparisons withK + p andK − p data and with deep inelastic scattering...
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Article
Photoproduction of ϕ mesons by linearly polarized photons of energy 20–40 GeV and further evidence for a photoproduced high-massKK enhancement
A study of ϕ-meson photoproduction by partially polarized photons of energy 20–40 GeV is reported. The production mechanism is found to conserves-channel helicity and to proceed via natural-parity exchange in the
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Article
Evidence for a ωϱ±π± state in diffractive photoproduction
The photoproduction of the final state ω π+π−π0 has been studied as part of a survey of photoproduction in the energy range 20–70 GeV in the Omega spectrometer at CERN. The π+π−π0 system produced with the ω meson...
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Article
The ρ′ in the reaction γp→ π+π−π0π0 p at photon energies of 20–70 GeV
The reactionγp→π + π − π 0 π 0 p (excludingωπ 0 production) has been studied for photon energies in the range 20–70 GeV. A peak is seen in the 4π mass spectrum at ∼1.66 GeV with a width of ∼0.3 GeV which is ident...
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Article
Study ofηπ+π− in the ϱ′(1600) mass region photoproduced in the reaction γp→ηπ+π− p at photon energies of 20 to 70 GeV
In diffractive photoproduction ofηπ+π−, the two-body substatesηρ0 andA 2π are found to contribute significantly to the cross-section forηπ+π− masses below 2.4 GeV. From a spin-parity analysis the branching ratio,...
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Article
Search for a ϕ′ vector meson in diffractive photoproduction ofK + K −π+π−
A study of photoproduction ofK + K −π+π− shows a broad threshold enhancement, about 30% of which is due toK * Kπ production. ThisK * Kπ component shows no dynamical features indicative of the existence of a ϕ′ ve...
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Article
Inclusive photoproduction of ϕ,K *(890) andK *(1420) in the photon energy range 20 to 70 GeV
Inclusive photoproduction of ϕ,K *0(890), \(\bar K*^0 \) andK *0(1420),
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Article
Diffractive photoproduction of ab 1π system
It is shown that a likely interpretation of theb 1 ± π∓ mass spectrum from diffractive photoproduction is that it is due to contributions from the ω3(1670), i...
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Article
A peak in the η ω mass spectrum from diffractive photoproduction
The η ω mass spectrum resulting from diffractive photoproduction, by photons of 25–50 GeV, shows a peak at a mass of 1.61±0.04 GeV and width of 0.23±0.08 GeV. Comparison with the corresponding η ρ0 mass spectrum ...
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Article
Photon diffractive dissociation to ρρπ and ρπππ states
This paper reports studies of the reactions γp→ρ π π πp and γp→ρ ρ πp. In particular a peak is reported in the ρ ρ π mass spectrum with closely similar mass and width to those of the ω ρ π peak previously reporte...
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Article
Open AccessImplications of LHCb measurements and future prospects
During 2011 the LHCb experiment at CERN collected 1.0 fb−1 of \(\sqrt{s} = 7\mbox{~TeV}\) pp collisions. ...
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Article
Open AccessThe phenomenology of electric dipole moments in models of scalar leptoquarks
We study the phenomenology of electric dipole moments (EDMs) induced in various scalar leptoquark models. We consider generic leptoquark couplings to quarks and leptons and match to Standard Model effective fi...
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Article
Open AccessMeasurement of electrons from heavy-flavour hadron decays as a function of multiplicity in p-Pb collisions at \( \sqrt{s_{\mathrm{NN}}} \) = 5.02 TeV
The multiplicity dependence of electron production from heavy-flavour hadron decays as a function of transverse momentum was measured in p-Pb collisions at ...
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Article
Open AccessUnderlying event properties in pp collisions at \( \sqrt{s} \) = 13 TeV
This article reports measurements characterizing the Underlying Event (UE) associated with hard scatterings at midrapidity (|η| < 0.8) in pp collisions at s\( \sqrt{s} \) = 13 TeV. The hard scatterings are identi...
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Article
Open AccessHigher harmonic non-linear flow modes of charged hadrons in Pb-Pb collisions at \( \sqrt{s_{\mathrm{NN}}} \) = 5.02 TeV
Anisotropic flow coefficients, vn, non-linear flow mode coefficients, χn,mk, and correlations among different symmetry planes, ρn,mk are measured in Pb-Pb collisions at s NN \( \sqrt{s_{\mathrm{NN}}} \) =...
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Article
Open AccessCoherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at \( \sqrt{{\mathrm{s}}_{\mathrm{NN}}} \) = 5.02 TeV
Cross sections for the coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at s NN \( \sqrt{{\mathrm{s}}_{\mathrm{NN}}} \) = 5.02 TeV are reported. The measurements, which re...
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Article
Open AccessNon-linear flow modes of identified particles in Pb-Pb collisions at \( \sqrt{s_{\mathrm{NN}}} \) = 5.02 TeV
The pT-differential non-linear flow modes, v4,22, v5,32, v6,33 and v6,222 for π±, K±, K S 0 \( {\mathrm{K}}_{\mathrm{S}}^0 \) , p + p ¯ \( \overline{\mathrm{p}} \) , Λ + Λ ¯ $$ \overline{\Lambda} ...
