Z. Fraenkel
Weizmann Institute of Science
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Featured researches published by Z. Fraenkel.
Physics Letters B | 1998
G. Agakichiev; R. Baur; P. Braun-Munzinger; F. Ceretto; A. Drees; S. Esumi; U. Faschingbauer; Z. Fraenkel; C. Fuchs; E. Gatti; P. Glässel; C.P. de los Heros; P. Holl; Ch. Jung; B. Lenkeit; M. Messer; Y. Panebrattsev; A. Pfeiffer; J. Rak; I. Ravinovich; S. Razin; P. Rehak; M. Richter; M. Sampietro; N. Saveljic; J. Schukraft; S. Shimansky; W. Seipp; E. Socol; H.J. Specht
We report a measurement of low-mass electron pairs observed in 158 GeV/nucleon Pb-Au collisions. The pair yield integrated over the range of invariant masses 0.2<m<2.0 GeV is enhanced by a factor of 3.5 +/- 0.4 (stat) +/- 0.9 (syst) over the expectation from neutral meson decays. As observed previously in S-Au collisions, the enhancement is most pronounced in the invariant-mass region 300-700 MeV. For Pb-Au we find evidence for a strong increase of the enhancement with centrality. In addition, we show that the enhancement covers a wide range in transverse momentum, but is largest at the lowest observed pt.We report a measurement of low-mass electron pairs observed in 158 GeV/nucleon Pb-Au collisions. The pair yield integrated over the range of invariant masses 0.2 < m < 2.0 GeV is enhanced by a factor of 3.5 +/- 0.4 (stat) +/- 0.9 (syst) over the expectation from neutral meson decays. As observed previously in S-Au collisions, the enhancement is most pronounced in the invariant-mass region 300-700 MeV. For Pb-Au we find evidence for a strong increase of the enhancement with centrality. In addition, we show that the enhancement covers a wide range in transverse momentum, but is largest at the lowest observed pt.Abstract We report a measurement of low-mass electron pairs observed in 158 GeV/nucleon Pb-Au collisions. The pair yield integrated over the range of invariant masses 0.2 ≤ m ≤ 2.0 GeV/c 2 is enhanced by a factor of 3.5 ± 0.4 (stat) ± 0.9 (syst) over the expectation from neutral meson decays. As observed previously in S-Au collisions, the enhancement is most pronounced in the invariant-mass region 300-700 MeV/c 2 . For Pb-Au we find evidence for a strong increase of the enhancement with centrality. In addition, we show that the enhancement covers a wide range in transverse momentum, but is largest at the lowest observed p ⊥ .
Nuclear Physics | 1999
B. Lenkeit; G. Agakichiev; H. Appelshäuser; R. Baur; P. Braun-Munzinger; F. Ceretto; A. Cherlin; A. Drees; S. Esumi; U. Faschingbauer; Z. Fraenkel; P. Glässel; G. Hering; P. Holl; Ch. Jung; A. Marín; M. Messer; D. Miskowiec; Y. Panebrattsev; A. Pfeiffer; J. Rak; I. Ravinovich; S. Razin; P. Rehak; M. Richter; N. Saveljic; W. Schmitz; J. Schukraft; W. Seipp; S. Shimanskiy
Abstract During the 1996 lead run time, CERES has accumulated 42 million events, corresponding to a factor of 5 more statistics than in 1995 and 2.5 million events of a special photon-run. We report on the results of the low-mass e + e − -pair analysis. Since the most critical item is the poor signal-to-background ratio we also discuss the understanding of this background, in absolute terms, with the help of a detailed Monte Carlo simulation. We show preliminary results of the photon analysis and summarize the results of the hadron analysis preliminarily reported on already at QM97 [1].During the 1996 lead run time, CERES has accumulated 42 million events, corresponding to a factor of 5 more statistics than in 1995 and 2.5 million events of a special photon-run. We report on the results of the low-mass e
European Physical Journal C | 1998
G. Agakichiev; M. Appenheimer; R. Averbeck; F. Ballester; R. Baur; A. Brenschede; J. Diaz; A. Drees; U. Faschingbauer; Jl Ferrero; Z. Fraenkel; M. Franke; C. Fuchs; E. Gatti; P. Glässel; Th. Günzel; C.P. de los Heros; F. Hess; R. Holzmann; Iourevitch; D. Irmscher; C Jacob; W. Kühn; B. Lenkeit; H. Löhner; A. Marín; Fm Marques; G. Martinez; Metag; M. Notheisen
^+
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1994
R. Baur; A. Breskin; R. Chechik; A. Drees; U. Faschingbauer; Peter Fischer; Z. Fraenkel; J. Gläss; P. Glässel; C.P. de los Heros; D. Irmscher; Reinhard Männer; A. Pfeiffer; A. Schön; J. Schukraft; Ch. Schwick; A. Shor; H.J. Specht; V. Steiner; S. Tapprogge; G. Tel-Zur; I. Tserruya; Th. Ullrich; J.P. Wurm
e
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1988
A. Breskin; R. Chechik; Z. Fraenkel; D. Sauvage; V. Steiner; I. Tserruya; G. Charpak; W. Dominik; J.P. Fabre; J. Gaudaen; F. Sauli; Masayo Suzuki; Peter Fischer; P. Glässel; H. Ries; A. Schön; H.J. Specht
^-
Nuclear Physics | 1998
Federica Ceretto; G. Agakichiev; H. Appelshäuser; R. Baur; P. Braun-Munzinger; F. Ceretto; A. Cherlin; A. Drees; P. Ernst; S. Esumi; U. Faschingbauer; Z. Fraenkel; C. Fuchs; E. Gatti; P. Glässel; C.P. de los Heros; G. Hering; P. Holl; Ch. Jung; B. Lenkeit; A. Marín; M. Messer; D. Miskowiec; O. Nix; Y. Panebrattsev; A. Pfeiffer; J. Rak; I. Ravinovich; S. Razin; P. Rehak
-pair analysis. Since the most critical item is the poor signal-to-background ratio we also discuss the understanding of this background, in absolute terms, with the help of a detailed Monte Carlo simulation. We show preliminary results of the photon analysis and summarize the results of the hadron analysis preliminarily reported on already at QM97
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1996
U. Faschingbauer; G. Agakichiev; R. Baur; F. Ceretto; A. Dress; Z. Fraenkel; C. Fuchs; E. Gatti; P. Glässel; F. Hess; M. Hemberger; C.P. de los Heros; Peter Holl; D. Irmscher; C. Jacob; J. Kemmer; Y. Minaev; Y. Panebrattsev; A. Pfeiffer; I. Ravinovich; S. Razin; P. Rehak; M. Sampietro; J. Schukraft; S. Shimanskiy; E. Socol; H.J. Spech; G. Tel-Zur; I. Tserruya; Th. Ullrich
Abstract. In a joint effort the CERES/NA45 and TAPS collaborations have measured low-mass electron pairs in p–Be and p–Au collisions at 450 GeV/n
Nuclear Physics | 1999
B. Lenkeit; S. Voloshin; P. Rehak; A. Cherlin; C. Voigt; J.P. Wessels; W. Schmitz; P. Braun-Munzinger; S. Razin; P. Glässel; D Miskowiec; S. Esumi; S S Shimansky; U. Faschingbauer; Th. Ullrich; P. Holl; A. Pfeiffer; Yu. Panebratsev; H.W. Kraner; J. Slivova; H.J. Specht; I. Ravinovich; E. Socol; G. Agakichiev; M. Richter; H. Appelshäuser; Ch. Jung; C. Fuchs; A. Drees; E. Gatti
c
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1996
G. Agakichiev; R. Baur; F. Ceretto; A. Drees; U. Faschingbauer; Z. Fraenkel; C. Fuchs; E. Gatti; P. Glässel; M. Hemberger; P. Holl; C.P. de los Heros; D. Irmscher; H.W. Kraner; B. Lenkeit; M. Messer; Y. Minaev; Y. Panebrattsev; A. Pfeiffer; I. Ravinovich; S. Razin; P. Rehak; M. Sampietro; J. Schukraft; S. Shimanskiy; E. Socol; H.J. Specht; G. Tel-Zur; I. Tserruya; Th. Ullrich
at the CERN SPS. In the range covered up to n
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1994
R. Baur; A. Drees; Peter Fischer; Z. Fraenkel; P. Glässel; H. Klein; A. Pfeiffer; A. Schön; A. Shor; H.J. Specht; V. Steiner; I. Tserruya; Th. Ullrich
approx
