C.P. de los Heros
Weizmann Institute of Science
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Featured researches published by C.P. de los Heros.
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 ⊥ .
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
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/
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
c
Nuclear Physics | 1996
Th. Ullrich; G. Agakichiev; R. Baur; P. Braun-Munzinger; F. Ceretto; A. Drees; S. Esumi; U. Faschingbauer; C. Fuchs; E. Gatti; P. Glässel; C.P. de los Heros; P. Holl; Ch. Jung; H.W. Kraner; B. Lenkeit; M. Messer; Y. Minaev; Y. Panebrattsev; A. Pfeiffer; J. Rak; I. Ravinovich; S. Razin; P. Rehak; M. Sampietro; J. Schukraft; S. Shimanskiy; E. Socol; H.J. Specht; J. Stachel
at the CERN SPS. In the range covered up to
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1993
Wei Chen; H.W. Kraner; Z. Li; P. Rehak; G. Bertuccio; E. Gatti; A. Longoni; M. Sampietro; P. Holl; J. Kemmer; U. Faschingbauer; F. Hess; C. Jacob; A. Wörner; J.P. Wurm; R. Baur; A. Drees; Peter Fischer; P. Glässel; Th. Günzel; D. Irmscher; L.H. Olsen; A. Pfeiffer; Bernhard M. W. Schmidt; A. Schoen; H.J. Specht; Th. Ullrich; S. Tapprogge; N. Wermes; A. Breskin
\approx
Nuclear Physics | 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. Shimanskiy; W. Seipp; E. Socol; H.J. Specht
1.5 GeV/
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
c^2
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
the mass spectra from p–Be and p–Au collisions are well explained by electron pairs from decays of neutral mesons. For p–Au our result is new. For p–Be, the simultaneously measured electron pair inclusive pair spectrum in which instrumental uncertainties are highly reduced. We confirm the earlier finding of HELIOS-1 with significantly reduced systematic uncertainties of 23% in the mass range below 450 MeV/
Nuclear Physics | 1998
E. Andres; P. Askebjer; S. W. Barwick; R. Bay; Lars Bergström; A. Biron; J. Booth; O. Botner; A. Bouchta; Staffan Carius; M. Carlson; W. Chinowsky; D. Chirkin; J. M. Conrad; C. G. S. Costa; D. F. Cowen; E. Dalberg; T. DeYoung; J. Edsjö; P. Ekström; Ariel Goobar; L. Gray; A. Hallgren; F. Halzen; R. Hardtke; S. Hart; Y. He; C.P. de los Heros; G. C. Hill; P. O. Hulth
c^2
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1989
C. Garabatos; P. Álvarez de Lara; E. Andersen; P.D. Barnes; R. Blaes; Helmut Braun; J.-M. Brom; B. Castaño; M. Cherney; M. Cohler; B. De La Cruz; G.E. Diebold; C. Fernandez; G. B. Franklin; J.A. Garzon; W.M. Geist; D.E. Greiner; C.R. Gruhn; M. Hafidouni; M. Heiden; C.P. de los Heros; J. Hubrec; D. Huss; J.L. Jacquot; P.G. Jones; J.P.M. Kuipers; P. Ladron de Guevara; D. Liko; G. Lovhoiden; J. MacNaughton
, and of 28% in the mass range above 750 MeV/
