R. T. Jones
University of Erlangen-Nuremberg
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Featured researches published by R. T. Jones.
Physical Review D | 1998
C. Evangelista; A. Palano; D. Drijard; N. Hamann; R. T. Jones; B. Mouellic; S. Ohlsson; J.-M. Perreau; W. Eyrich; M. Moosburger; S. Pomp; F. Stinzing; H. Fischer; J. Franz; E. Rössle; H. Schmitt; H. Wirth; A. Buzzo; K. Kirsebom; M. Lo Vetere; M. Macri; M. Marinelli; S. Passaggio; M. G. Pia; A. Pozzo; E. Robutti; A. Santroni; P. T. Debevec; R. A. Eisenstein; P. Harris
A study has been performed of the reaction pbar p -> 4K using in-flight antiprotons from 1.1 to 2.0 GeV/c incident momentum interacting with a hydrogen jet target. The reaction is dominated by the production of a pair of phi mesons. The pbar p -> phi phi cross section rises sharply above threshold and then falls continuously as a function of increasing antiproton momentum. The overall magnitude of the cross section exceeds expectations from a simple application of the OZI rule by two orders of magnitude. In a fine scan around the xi/f_J(2230) resonance, no structure is observed. A limit is set for the double branching ratio B(xi -> pbar p) * B(xi -> phi phi) < 6e-5 for a spin 2 resonance of M = 2.235 GeV and Width = 15 MeV.
Physical Review D | 1997
C. Evangelista; A. Palano; D. Drijard; N. Hamann; R. T. Jones; B. Mouellic; S. Ohlsson; J.-M. Perreau; W. Eyrich; M. Moosburger; S. Pomp; F. Stinzing; H. Fischer; J. Franz; E. Rössle; H. Schmitt; H. Wirth; A. Buzzo; K. Kirsebom; M. Lo Vetere; M. Macri; M. Marinelli; S. Passaggio; M. G. Pia; A. Pozzo; E. Robutti; A. Santroni; P. T. Debevec; R. A. Eisenstein; P. Harris
The pbar p -> Ks Ks -> 4pi+/- cross section was measured at incident antiproton momenta between 0.6 and 1.9 GeV/c using the CERN Low Energy Antiproton Ring (LEAR). This investigation was part of a systematic study of in-flight antiproton-proton annihilations into two-neutral-meson final states in a search for hadronic resonances. A coarse scan of the pbar p -> Ks Ks cross section as a function of center-of-mass energy between 1.964 and 2.395 GeV/c^2 and a fine scan of the region surrounding the Xi(2220) are presented. Upper limits on the product branching ratio BR(Xi -> pbar p)BR(Xi -> Ks Ks) are determined for a wide range of mass and width assumptions based on the non-observation of the Xi(2220). A rise in the pbar p -> Ks Ks cross section is observed near 2.15 GeV/c^2, which is consistent with the f2(2150) resonance.
Physical Review D | 1998
C. Evangelista; B. Stugu; R. T. Jones; E. Rössle; F. Stinzing; S. Ohlsson; K. Kilian; A. Palano; D. Drijard; Paul E. Reimer; P. Harris; R. A. Eisenstein; M. Moosburger; H. Schmitt; T. Johansson; H. Korsmo; K. Rohrich; B. Mouellic; R. Geyer; M. Marinelli; S. Pomp; J. Ritter; N. Hamann; O. Steinkamp; W. Oelert; W. Eyrich; M. G. Pia; D. Hertzog; A. Buzzo; M. Lo Vetere
A study has been performed of the reaction pbar p -> 4K using in-flight antiprotons from 1.1 to 2.0 GeV/c incident momentum interacting with a hydrogen jet target. The reaction is dominated by the production of a pair of phi mesons. The pbar p -> phi phi cross section rises sharply above threshold and then falls continuously as a function of increasing antiproton momentum. The overall magnitude of the cross section exceeds expectations from a simple application of the OZI rule by two orders of magnitude. In a fine scan around the xi/f_J(2230) resonance, no structure is observed. A limit is set for the double branching ratio B(xi -> pbar p) * B(xi -> phi phi) < 6e-5 for a spin 2 resonance of M = 2.235 GeV and Width = 15 MeV.
Physical Review D | 1998
C. Evangelista; A. Palano; D. Drijard; N. Hamann; R. T. Jones; B. Mouellic; S. Ohlsson; J.-M. Perreau; W. Eyrich; M. Moosburger; S. Pomp; F. Stinzing; H. Fischer; J. Franz; E. Rössle; H. Schmitt; H. Wirth; A. Buzzo; K. Kirsebom; M. Lo Vetere; M. Macri; M. Marinelli; S. Passaggio; M. G. Pia; A. Pozzo; E. Robutti; A. Santroni; P. T. Debevec; R. A. Eisenstein; P. Harris
A study has been performed of the reaction pbar p -> 4K using in-flight antiprotons from 1.1 to 2.0 GeV/c incident momentum interacting with a hydrogen jet target. The reaction is dominated by the production of a pair of phi mesons. The pbar p -> phi phi cross section rises sharply above threshold and then falls continuously as a function of increasing antiproton momentum. The overall magnitude of the cross section exceeds expectations from a simple application of the OZI rule by two orders of magnitude. In a fine scan around the xi/f_J(2230) resonance, no structure is observed. A limit is set for the double branching ratio B(xi -> pbar p) * B(xi -> phi phi) < 6e-5 for a spin 2 resonance of M = 2.235 GeV and Width = 15 MeV.
Intersections between particle and nuclear physics | 2008
Philip Harris; D. Bassi; P. Biren; R. Bock; A. Buzzo; E. Chesi; P. T. Debevec; D. Drijard; W. Dutty; S. Easo; R. A. Eisenstein; T. Fearnley; M. Ferro‐Luzzi; J. Franz; N. Hamann; R. Harfield; P. Harris; David W. Hertzog; Scott A. Hughes; A. Johansson; R. T. Jones; K. Kilian; K. Kirsebom; A. Klett; H. Korsmo; M. Lovetere; M. Macri; B. Mouellic; W. Oelert; S. Ohlsson
The Jetset experiment (PS202) at LEAR uses a compact detector around a hydrogen cluster jet target to perform spectroscopy of hadronic states in the mass range 1.96 to 2.43 GeV, with emphasis on the reaction pp→φφ. Following two short test runs, analysis has clearly revealed a surprisingly copious production of φφ events. This paper gives a brief introduction to the physics motivation of the experiment and an overview of results from some previous experiments, followed by a description of the Jetset detector and of the analysis that led to a preliminary estimate of 0.2–2.0 μb for the pp→φφ cross section at a center‐of‐mass energy of 2.25 GeV.
Physical Review D | 1997
C. Evangelista; A. Palano; D. Drijard; N. Hamann; R. T. Jones; B. Moueellic; S. Ohlsson; J.-M. Perreau; W. Eyrich; M. Moosburger; S. Pomp; F. Stinzing; H. Fischer; J. Franz; E. Roessle; H. Schmitt; H. Wirth; A. Buzzo; K. Kirsebom; M. Lo Vetere; M. Macri; M. Marinelli; S. Passaggio; M. G. Pia; A. Pozzo; E. Robutti; A. Santroni; P. T. Debevec; R. A. Eisenstein; P. Harris
The pbar p -> Ks Ks -> 4pi+/- cross section was measured at incident antiproton momenta between 0.6 and 1.9 GeV/c using the CERN Low Energy Antiproton Ring (LEAR). This investigation was part of a systematic study of in-flight antiproton-proton annihilations into two-neutral-meson final states in a search for hadronic resonances. A coarse scan of the pbar p -> Ks Ks cross section as a function of center-of-mass energy between 1.964 and 2.395 GeV/c^2 and a fine scan of the region surrounding the Xi(2220) are presented. Upper limits on the product branching ratio BR(Xi -> pbar p)BR(Xi -> Ks Ks) are determined for a wide range of mass and width assumptions based on the non-observation of the Xi(2220). A rise in the pbar p -> Ks Ks cross section is observed near 2.15 GeV/c^2, which is consistent with the f2(2150) resonance.
Archive | 1998
C. Evangelista; Antimo Palano; D. Drijard; Nikolaus H. Hamann; R. T. Jones; B Mouëllic; Stellan Ohlsson; J.-M. Perreau; W. Eyrich; M. Moosburger; S. Pomp; F. Stinzing; H.G. Fischer; J. Franz; E. Rössle; H. von der Schmitt; H. Wirth; A. Buzzo; K. Kirsebom; M. Lo Vetere; M. Macri; M. Marinelli; S. Passaggio; M. G. Pia; A. Pozzo; E. Robutti; A. Santroni; P. T. Debevec; Robert A. Eisenstein; P. Harris
Physical Review D | 1997
C. Evangelista; A. Palano; D. Drijard; Nikolaus H. Hamann; R. T. Jones; B. Moueellic; S. Ohlsson; J.-M. Perreau; W. Eyrich; M. Moosburger; S. Pomp; F. Stinzing; Hans Fischer; J. Franz; E. Roessle; H. von der Schmitt; H. Wirth; A. Buzzo; K. Kirsebom; M. Lo Vetere; M. Macri; Marco Marinelli; S. Passaggio; M. G. Pia; Andrea Pozzo; E. Robutti; A. Santroni; P. T. Debevec; R. A. Eisenstein; P. Harris
Archive | 1997
A. Buzzo; P. T. Debevec; D. Drijard; Robert A. Eisenstein; C. Evangelista; W. Eyrich; H.G. Fischer; J. Franz; R. Geyer; Nikolaus H. Hamann; P. Harris; David W. Hertzog; Scott A. Hughes; Tomas Johansson; R. T. Jones; Karsten Kilian; K. Kirsebom; H. Korsmo; M. Lo Vetere; M. Macri; M. Marinelli; M. Moosburger; B Mouëllic; W. Oelert; Stellan Ohlsson; Antimo Palano; S. Passaggio; J.-M. Perreau; M. G. Pia; S. Pomp
European Physical Journal C | 1997
A Buzzo; P. T. Debevec; D. Drijard; R. A. Eisenstein; C Evangelista; W. Eyrich; H. Fischer; J. Franz; R. Geyer; N. Hamann; P. Harris; D. Hertzog; Sa Hughes; Tord Johansson; R. T. Jones; K. Kilian; K. Kirsebom; H. Korsmo; M Lovetere; M. M. Macri; Marco Marinelli; M Moosburger; Moue