F. Lacava
CERN
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Publication
Featured researches published by F. Lacava.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1996
M Adamovich; M. Adinolfi; Y. Alexandrov; C. Angelini; Federico Antinori; C. Bacci; G Barber; Dario Barberis; D. Barney; J. Batten; W. Beusch; C. Bruschini; R. Cardarelli; A. Cardini; Casanova; F Ceradini; Guido Ciapetti; N Dameri; Giovanni Darbo; A. Diciaccio; A Duane; J.P. Dufey; P. Farthouat; Flaminio; A. Forino; B.R. French; A Frenkel; C. Gemme; R. Gessaroli; K. Harrison
Abstract We describe the detectors and trigger system used in the CERN WA92 experiment. The experiment was designed to study the production and decay of beauty particles from 350 GeV/ c π − interactions in copper and tungsten targets. Charged particle tracking is performed using the omega spectrometer. Silicon microstrip detectors are used to provide precise tracking information in the region of the production and the decay of heavy-flavoured particles and to trigger on the resulting high impact parameter tracks. The precision of vertex reconstruction corresponds to ±3.7% of the mean B-decay proper lifetime. Lepton and high transverse momentum hadron signals are also used in the trigger, which accepts 23% of B-decays and rejects 98.4% of non-beauty interactions.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1990
C. Bacci; A. Bezaguet; D. Bloess; A. Caner; F. Cavanna; F.J. Diez-Hedo; D. Drijard; L. Dumps; A. DiCiaccio; H. Evans; A. Fernando; A. Givernaud; A. Gonidec; M.I. Josa; M. Krammer; F. Lacava; M. Lindgren; C. Markou; G. Maurin; K. Morgan; R.C. Muñoz; L. Naumann; Emilio Petrolo; A. Placci; L. Pontecorvo; E. Radermacher; D. Robinson; T. Rodrigo; C. Rubbia; J. Salicio
Abstract A uranium tetramethylpentane hadronic calorimeter has been tested using electrons and pions of 7 GeV/ c momentum with electric fields varying from 0.8 to 16.0 kV/cm; the e/π charge collection ratio has been measured as a function of the electric field within this range. It is observed that the e/π ratio can be tuned acting on the electric field without spoiling the energy resolution for electrons. At the same time the energy resolution for pions is improved. The effect was cross-checked using a second module and 40 GeV/ c electron and pion beams.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1991
R. J. Apsimon; C. Bacci; G. Bauer; A. Bezaguet; D. Bloess; J. M. Bodenes; R. Bonino; C. Buchanan; G. Busetto; A. Caner; L. Casoli; H. Castilla-Valdez; F. Cavanna; P. Cennini; S. Centro; F. Ceradini; R. Conte; M. Dellanegra; Anna Di Ciaccio; Giorgi M. De; Hedo F. J. Diez; D. Drijard; L. Dumps; H. Evans; A. Ferrando; T A. Fuess; A. Givernaud; A. Gonidec; J. Gronberg; I. Josa-Mutuberria
We present results from the barrel depleted uranium/TMP calorimeter modules constructed by the UA1 Collaboration. Electromagnetic and hadronic energy resolutions have been measured using electron and pion beams with momenta in the range 7 to 70 GeV/c. Results on the energy linearity and the spatial uniformity of response are reported. The electromagnetic shower position resolution has been measured as a function of energy using a fine grained position detector placed at a depth of − 3.5small chi, Greek0. The noise arising both from the electronics chain and from the uranium radioactivity is compared with 70 GeV/c muon signals. The ratio of the electron to pion response has been measured both as a function of the energy and of the electric field. The high lateral and longitudinal granularity of the calorimeter and the presence of a position detector have been used to determine the electron pion separation as a function of energy.
Physics Letters B | 1995
M. I. Adamovich; P. Mazzanti; A. Quareni; M. Dameri; A. Forino; A. Cardini; C. Cianfarani; G. Penso; A. Semenov; J. Batten; Dario Barberis; L. Pontecorvo; W. Beusch; L. Zanello; V. Casanova; C. Bruschini; B.R. French; H. Rotscheidt; D. Websdale; V. Ryzhov; Py Nechaeva; Guido Ciapetti; F. Lacava; M. Adinolfi; Jg Mcewen; R.B. Hurst; B. Osculati; W. Jank; M. Passaseo; R. Cardarelli
Abstract We have searched for the decay D 0 → μ + μ − among 1.25 × 10 5 μ + μ − pairs produced by 350 GeV/ c π − particles interacting in copper and tungsten targets. Using a high-resolution silicon-microstrip detector followed by a large-acceptance magnetic spectrometer and a muon filter we are able to discriminate between prompt and non-prompt muons and to measure dimuon masses. No candidate compatible with a D 0 → μ + μ − decay has been found, allowing us to set an upper limit on the branching fraction B( D 0 → μ + μ − ) of 7.6 × 10 −6 at the 90% confidence level.
