Author
J.G. McEwen
Bio: J.G. McEwen is an academic researcher from University of Southampton. The author has contributed to research in topics: Meson & Quantum chromodynamics. The author has an hindex of 11, co-authored 26 publications receiving 380 citations.
Papers
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TL;DR: The χ1++(3507) and the χ2++(3553) states have been observed in the Goliath spectrometer at the CERN SPS in 185 GeV/c π−-Be collisions.
69 citations
TL;DR: In this article, the authors studied charmed meson production by 350 GeV/c π − particles incident on copper and tungsten targets at the CERN Ω′ spectrometer.
50 citations
TL;DR: In this paper, the first results on photo-production of prompt photons at high transverse momenta were obtained using a high intensity photon beam energy between 50 and 150 GeV.
31 citations
TL;DR: In this article, the first results on inclusive photoproduction of π 0 at transverse momenta up to 4 GeV/ c, using incident γ energies between 50 and 150 GeV, were presented.
29 citations
TL;DR: In a large-acceptance spectrometer, muon pairs and associated hadrons were observed with μμ masses up to 10 GeV/c2 and ΔM M = 0.015 resolution as mentioned in this paper.
21 citations
Cited by
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TL;DR: In this article, it was shown that the meson σ and κ mesons exhibit a spectrum of (squared) masses which are proportional to the sum of orbital angular momentum and radial quantum numbers.
716 citations
20 Apr 1997-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: The COMPASS Collaboration as discussed by the authors is a large-scale project to study the structure and spectroscopy of hadrons by a series of experiments with muon and hadron beams in the energy range of 100-200 GeV.
Abstract: The COMPASS Collaboration brings together about 220 physicists from 27 institutes from Europe, Russia, Japan and India. The goal is to study the structure and spectroscopy of hadrons by a series of experiments with muon and hadron beams in the energy range of 100–200 GeV. The experiment [1] is located at the M2 beam line at the CERN SPS. In 1995 the project started out with two letters of intent which were merged into a common proposal and which was fully approved in September 1998. The first construction phase ended with a commissioning run in 2001. In this article the results of this commissioning run are presented and an outlook on the 2002 run is given.
411 citations
TL;DR: Experimental data on particle correlations and fluctuations in various high-energy multiparticle collisions are presented, with special emphasis on evidence for scaling-law evolution in small phase-space domains as mentioned in this paper.
309 citations
TL;DR: In this paper, a detailed study of J/ψ hadronic production has been performed in a high statistics experiment (more than 1.5 106 Jψ observed in their dimuon decay mode) and data have been taken with incident π±,K±,p±, at 150, 200 and 280 GeV/c.
Abstract: A detailed study ofJ/ψ hadronic production has been performed in a high statistics experiment (more than 1.5 106J/ψ observed in their dimuon decay mode). Data have been taken with incident π±,K±,p±, on hydrogen and platinum targets, at 150, 200 and 280 GeV/c. We find from the observed nuclear dependance of the cross sections, that about 18% of theJ/ψ are produced diffractively. Using known structure functions of the quarks in the nucleon and in the pion, we derive estimations for the gluon structure functions.
210 citations
TL;DR: In this article, the authors discuss the prediction of J / ψ suppression and the systematics of this signature as a function of the transverse energy of the collision and transverse momentum of the J/ ψ.
207 citations