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84 results on '"F.L. FABBRI"'

1. Experimental study of the (K+,K0) interactions on 7Li close to threshold

Author

Michele Arturo Caponero, V. Filippini, F. Pompili, A. Panzarasa, F. De Mori, P. Gianotti, G. D’Erasmo, Stefania Bufalino, R. Rui, A. Feliciello, H. So, G. A. Beer, D. Faso, S. Piano, M. Agnello, V. Lenti, E. Pace, E. M. Fiore, M. Bertani, Alexey Krasnoperov, H.B. Kang, D. Di Santo, E. Botta, R. Fini, V. Tereshchenko, M. Palomba, M. Pallotta, T. Bressani, H. C. Bhang, T. Maruta, O. Hartmann, A. Filippi, N. Mirfakhrai, V. Paticchio, A. Zenoni, N. Grion, B. Dalena, V. Lucherini, D. Calvo, Tomofumi Nagae, S. Marcello, Marco Bregant, Germano Bonomi, P. Cerello, V. Manzari, F.L. Fabbri, Hiroyuki Fujioka, L. Busso, G. Simonetti, A. Olin, P. Camerini, A. Pantaleo, O. Morra, Stefano Bianco, D. Elia, Akihisa Toyoda, Sandro Tomassini, R. Wheadon, Haruhiko Outa, and L. Benussi

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Cross section (physics), Momentum (technical analysis), Spectrometer, law, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Collider, law.invention, Charge exchange
Abstract

The inelastic charge exchange reaction ( K + , K 0 ) on 7Li has been experimentally investigated close to threshold with the FINUDA spectrometer at the e + e − collider DAΦNE by searching for K S 0 decays. It is the first time that this process has been studied at such low momentum. An upper limit of 2.0 mb (at 95% confidence level) has been measured for the total cross section.

Published
2007
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2. Hadronic mass spectrum analysis of D+→K−π+μ+ν decay and measurement of the K∗(892)0 mass and width

Author

J.M. Link, P.M. Yager, J.C. Anjos, I. Bediaga, C. Göbel, A.A. Machado, J. Magnin, A. Massafferri, J.M. de Miranda, I.M. Pepe, E. Polycarpo, A.C. dos Reis, S. Carrillo, E. Casimiro, E. Cuautle, A. Sánchez-Hernández, C. Uribe, F. Vázquez, L. Agostino, L. Cinquini, J.P. Cumalat, B. O'Reilly, I. Segoni, K. Stenson, J.N. Butler, H.W.K. Cheung, G. Chiodini, I. Gaines, P.H. Garbincius, L.A. Garren, E. Gottschalk, P.H. Kasper, A.E. Kreymer, R. Kutschke, M. Wang, L. Benussi, M. Bertani, S. Bianco, F.L. Fabbri, A. Zallo, M. Reyes, C. Cawlfield, D.Y. Kim, A. Rahimi, J. Wiss, R. Gardner, A. Kryemadhi, Y.S. Chung, J.S. Kang, B.R. Ko, J.W. Kwak, K.B. Lee, K. Cho, H. Park, G. Alimonti, S. Barberis, M. Boschini, A. Cerutti, P. D'Angelo, M. DiCorato, P. Dini, L. Edera, S. Erba, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Moroni, D. Pedrini, C. Pontoglio, F. Prelz, M. Rovere, S. Sala, T.F. Davenport, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, D. Lopes Pegna, M.M. Merlo, D. Pantea, S.P. Ratti, C. Riccardi, P. Vitulo, H. Hernandez, A.M. Lopez, H. Mendez, A. Paris, J. Quinones, J.E. Ramirez, Y. Zhang, J.R. Wilson, T. Handler, R. Mitchell, D. Engh, M. Hosack, W.E. Johns, E. Luiggi, J.E. Moore, M. Nehring, P.D. Sheldon, E.W. Vaandering, M. Webster, and M. Sheaff

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Branching fraction, Hadron, Analytical chemistry, Mass spectrum, Spectrum analysis, Mass spectrum analysis
Abstract

We present a Kπ mass spectrum analysis of the four-body semileptonic charm decay D+→K−π+μ+ν in the range of 0.65GeV/c2

Published
2005
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3. First results on 12ΛC production at DAΦNE

Author

Paolo Camerini, M. E. Fiore, E. Pace, M. Bertani, V. Filippini, V. Tereshchenko, D. Calvo, H. So, G. D'Erasmo, G. Simonetti, A. Olin, Akihisa Toyoda, Piergiorgio Cerello, F. Pompili, M. Caponero, V. Manzari, D. Di Santo, F.L. Fabbri, G. A. Beer, Sandro Tomassini, A. Panzarasa, Michelangelo Agnello, Marco Bregant, Stefano Bianco, L. Busso, T. Maruta, D. Elia, Hiroyuki Fujioka, M. Pallotta, V. Lucherini, Tomofumi Nagae, R. Donà, F. De Mori, V. Paticchio, Alessandro Feliciello, Alexey Krasnoperov, L. Benussi, B. Dalena, H. Outa, R. Wheadon, D. Faso, Rinaldo Rui, S. Marcello, N. Grion, S. Piano, A. Pantaleo, Elena Botta, H. C. Bhang, O. Morra, V. Lenti, Tullio Bressani, Paola Gianotti, A. Filippi, N. Mirfakhrai, Aldo Zenoni, R. Fini, and M. Palomba

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Spectrometer, Hadron, Lambda, law.invention, Nuclear physics, Momentum, Full width at half maximum, law, Excited state, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, Collider, Ground state
Abstract

A-hypenuclei are produced and studied, with the FINUDA spectrometer, for the first time at an e(+)e(-) collider: DA Phi NE, the Frascati phi-factory. The slow negative kaons from phi(1020) decay are stopped in thin (0.2 g/cm(2)) nuclear targets, and A-hypemuclei formation is detected by measuring the momentum of the outgoing pi(-). A preliminary analysis on C-12(Lambda) shows X an energy resolution of 1.29 MeV FWHM on the hypernuclear levels, the best obtained so far with magnetic spectrometers at hadron facilities. Capture rates for the ground state and the excited ones are reported, and compared with previous experiments. (c) 2005 Elsevier B.V. All rights reserved

Published
2005
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4. Measurement of masses and widths of excited charm mesons D and evidence for broad states

Author

J.M. Link, P.M. Yager, J.C. Anjos, I. Bediaga, C. Göbel, A.A. Machado, J. Magnin, A. Massafferri, J.M. de Miranda, I.M. Pepe, E. Polycarpo, A.C. dos Reis, S. Carrillo, E. Casimiro, E. Cuautle, A. Sánchez-Hernández, C. Uribe, F. Vázquez, L. Agostino, L. Cinquini, J.P. Cumalat, B. O'Reilly, I. Segoni, M. Wahl, J.N. Butler, H.W.K. Cheung, G. Chiodini, I. Gaines, P.H. Garbincius, L.A. Garren, E. Gottschalk, P.H. Kasper, A.E. Kreymer, R. Kutschke, M. Wang, L. Benussi, M. Bertani, S. Bianco, F.L. Fabbri, A. Zallo, M. Reyes, C. Cawlfield, D.Y. Kim, A. Rahimi, J. Wiss, R. Gardner, A. Kryemadhi, Y.S. Chung, J.S. Kang, B.R. Ko, J.W. Kwak, K.B. Lee, K. Cho, H. Park, G. Alimonti, S. Barberis, M. Boschini, A. Cerutti, P. D'Angelo, M. DiCorato, P. Dini, L. Edera, S. Erba, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Moroni, D. Pedrini, C. Pontoglio, F. Prelz, M. Rovere, S. Sala, T.F. Davenport, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, M.M. Merlo, D. Pantea, D. Lopes Pegna, S.P. Ratti, C. Riccardi, P. Vitulo, H. Hernandez, A.M. Lopez, E. Luiggi, H. Mendez, A. Paris, J.E. Ramirez, Y. Zhang, J.R. Wilson, T. Handler, R. Mitchell, D. Engh, M. Hosack, W.E. Johns, M. Nehring, P.D. Sheldon, K. Stenson, E.W. Vaandering, M. Webster, and M. Sheaff

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Meson, Excited state, Resonance, Invariant mass, Charm (quantum number), State (functional analysis), Atomic physics
Abstract

Using data from the FOCUS experiment we analyze the D+π− and D0π+ invariant mass distributions. We measure the D 2 ∗0 mass M D 2 ∗0 =(2464.5±1.1±1.9) MeV /c 2 and width Γ D 2 ∗0 =(38.7±5.3±2.9) MeV /c 2 , and the D 2 ∗+ mass M D 2 ∗+ =(2467.6±1.5±0.76) MeV /c 2 and width Γ D 2 ∗+ =(34.1±6.5±4.2) MeV /c 2 . We find evidence for broad structures over background in both the neutral and charged final state. If each is interpreted as evidence for a single L=1, jq=1/2 excited charm meson resonance, the masses and widths are M 1/2 0 =(2407±21±35) MeV /c 2 , Γ 1/2 0 =(240±55±59) MeV /c 2 , and M 1/2 + =(2403±14±35) MeV /c 2 , Γ 1/2 + =(283±24±34) MeV /c 2 , respectively.

Published
2004
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5. New measurements of the D+→φμ+ν form factor ratios

Author

J.M. Link, P.M. Yager, J.C. Anjos, I. Bediaga, C. Göbel, A.A. Machado, J. Magnin, A. Massafferri, J.M. de Miranda, I.M. Pepe, E. Polycarpo, A.C. dos Reis, S. Carrillo, E. Casimiro, E. Cuautle, A. Sánchez-Hernández, C. Uribe, F. Vázquez, L. Agostino, L. Cinquini, J.P. Cumalat, J. Jacobs, B. O'Reilly, I. Segoni, K. Stenson, J.N. Butler, H.W.K. Cheung, G. Chiodini, I. Gaines, P.H. Garbincius, L.A. Garren, E. Gottschalk, P.H. Kasper, A.E. Kreymer, R. Kutschke, M. Wang, L. Benussi, M. Bertani, S. Bianco, F.L. Fabbri, A. Zallo, M. Reyes, C. Cawlfield, D.Y. Kim, A. Rahimi, J. Wiss, R. Gardner, Y.S. Chung, J.S. Kang, B.R. Ko, J.W. Kwak, K.B. Lee, K. Cho, H. Park, G. Alimonti, S. Barberis, M. Boschini, A. Cerutti, P. D'Angelo, M. DiCorato, P. Dini, L. Edera, S. Erba, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Moroni, D. Pedrini, C. Pontoglio, F. Prelz, M. Rovere, S. Sala, T.F. Davenport, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, M.M. Merlo, D. Pantea, D. Lopes Pegna, S.P. Ratti, C. Riccardi, P. Vitulo, H. Hernandez, A.M. Lopez, H. Mendez, A. Paris, J.E. Ramirez, Y. Zhang, J.R. Wilson, T. Handler, R. Mitchell, D. Engh, M. Hosack, W.E. Johns, E. Luiggi, M. Nehring, P.D. Sheldon, E.W. Vaandering, M. Webster, and M. Sheaff

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Analytical chemistry, Form factor (quantum field theory), Large sample
Abstract

Using a large sample of D s + → φμ + ν decays collected by the FOCUS photoproduction experiment at Fermilab, we present new measurements of two semileptonic form factor ratios: r v and r 2 . We find r v =1.549±0.250±0.148 and r 2 =0.713±0.202±0.284. These values are consistent with r v and r 2 form factors measured for the process D + → K ∗0 l + ν l .

Published
2004
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6. Charm–anticharm baryon production asymmetries in photon–nucleon interactions

Author

J.M Link, P.M Yager, J.C Anjos, I Bediaga, C Göbel, A.A Machado, J Magnin, A Massafferri, J.M de Miranda, I.M Pepe, E Polycarpo, A.C dos Reis, S Carrillo, E Casimiro, E Cuautle, A Sánchez-Hernández, F Vázquez, C Uribe, L Agostino, L Cinquini, J.P Cumalat, B O'Reilly, I Segoni, M Wahl, J.N Butler, H.W.K Cheung, G Chiodini, I Gaines, P.H Garbincius, L.A Garren, E Gottschalk, P.H Kasper, A.E Kreymer, R Kutschke, M Wang, L Benussi, M Bertani, S Bianco, F.L Fabbri, A Zallo, M Reyes, C Cawlfield, D.Y Kim, A Rahimi, J Wiss, R Gardner, A Kryemadhi, Y.S Chung, J.S Kang, B.R Ko, J.W Kwak, K.B Lee, K Cho, H Park, G Alimonti, S Barberis, M Boschini, A Cerutti, P D'Angelo, M DiCorato, P Dini, L Edera, S Erba, M Giammarchi, P Inzani, F Leveraro, S Malvezzi, D Menasce, M Mezzadri, L Moroni, D Pedrini, C Pontoglio, F Prelz, M Rovere, S Sala, T.F Davenport, V Arena, G Boca, G Bonomi, G Gianini, G Liguori, M.M Merlo, D Pantea, D Lopes Pegna, S.P Ratti, C Riccardi, P Vitulo, H Hernandez, A.M Lopez, E Luiggi, H Mendez, A Paris, J.E Ramirez, Y Zhang, J.R Wilson, T Handler, R Mitchell, D Engh, M Hosack, W.E Johns, M Nehring, P.D Sheldon, K Stenson, E.W Vaandering, M Webster, and M Sheaff

Subjects
Physics, Particle physics, Nuclear and High Energy Physics, Photon, media_common.quotation_subject, FOS: Physical sciences, Asymmetry, High Energy Physics - Experiment, Baryon, High Energy Physics - Experiment (hep-ex), Excited state, Production (computer science), Charm (quantum number), Fermilab, Nucleon, media_common
Abstract

We report measurements of the charm-anticharm production asymmetries for $\Lambda_c^+$, $\Sigma_c^{++}$, $\Sigma_c^0$, $\Sigma_c^{++*}$, $\Sigma_c^{0*}$, and $\Lambda_c^+(2625)$ baryons from the Fermilab photoproduction experiment FOCUS (E831). These asymmetries are integrated over the region where the spectrometer has good acceptance. In addition, we have obtained results for the photoproduction asymmetries of the $\Lambda_c$ baryons as functions of $p_L$, $p_T^2$, and $x_F$. The integrated asymmetry for $\Lambda_c^+$ production, $(\sigma_{\Lambda_c^+} - \sigma_{\Lambda_c^-}) / (\sigma_{\Lambda_c^+} + \sigma_{\Lambda_c^-})$, is $0.111 \pm 0.018 \pm 0.012$, significantly different from zero. The asymmetries of the excited states are consistent with the $\Lambda_c$ asymmetry., Comment: 12 pages, 9 figures, 1 table

Published
2004
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7. Studies of correlations between D and D mesons in high energy photoproduction

Author

J.M. Link, P.M. Yager, J.C. Anjos, I. Bediaga, C. Göbel, J. Magnin, A. Massafferri, J.M. de Miranda, I.M. Pepe, E. Polycarpo, A.C. dos Reis, S. Carrillo, E. Casimiro, E. Cuautle, A. Sánchez-Hernández, C. Uribe, F. Vázquez, L. Agostino, L. Cinquini, J.P. Cumalat, B. O'Reilly, I. Segoni, M. Wahl, J.N. Butler, H.W.K. Cheung, G. Chiodini, I. Gaines, P.H. Garbincius, L.A. Garren, E.E. Gottschalk, P.H. Kasper, A.E. Kreymer, R. Kutschke, M. Wang, L. Benussi, M. Bertani, S. Bianco, F.L. Fabbri, A. Zallo, M. Reyes, C. Cawlfield, D.Y. Kim, A. Rahimi, J. Wiss, R. Gardner, A. Kryemadhi, Y.S. Chung, J.S. Kang, B.R. Ko, J.W. Kwak, K.B. Lee, K. Cho, H. Park, G. Alimonti, S. Barberis, M. Boschini, A. Cerutti, P. D'Angelo, M. DiCorato, P. Dini, L. Edera, S. Erba, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Moroni, D. Pedrini, C. Pontoglio, F. Prelz, M. Rovere, S. Sala, T.F. Davenport, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, D. Lopes Pegna, M.M. Merlo, D. Pantea, S.P. Ratti, C. Riccardi, P. Vitulo, H. Hernandez, A.M. Lopez, E. Luiggi, H. Mendez, A. Paris, J. Quinones, J.E. Ramirez, Y. Zhang, J.R. Wilson, T. Handler, R. Mitchell, D. Engh, M. Hosack, W.E. Johns, M. Nehring, P.D. Sheldon, K. Stenson, E.W. Vaandering, M. Webster, and M. Sheaff

Subjects
Quark, Physics, High energy, Particle physics, Nuclear and High Energy Physics, Meson, Bar (music), Nuclear Theory, High Energy Physics::Phenomenology, FOS: Physical sciences, Large sample, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Production (computer science), High Energy Physics::Experiment, Fermilab, Charm (quantum number), Nuclear Experiment
Abstract

Studies of $D{\bar D}$ correlations for a large sample of events containing fully and partially reconstructed pairs of charmed $D$ mesons recorded by the Fermilab photoproduction experiment FOCUS (FNAL-E831) are presented. Correlations between $D$ and ${\bar D}$ mesons are used to study heavy quark production dynamics. We present results for fully and partially reconstructed charm pairs and comparisons to a recent version of \textsc{Pythia} with default parameter settings. We also comment on the production of $\psi(3770)$ in our data., Comment: 14 pages, 4 figures

Published
2003
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8. Measurement of the Ωc0 lifetime

Author

J.M Link, M Reyes, P.M Yager, J.C Anjos, I Bediaga, C Göbel, J Magnin, A Massafferri, J.M de Miranda, I.M Pepe, A.C dos Reis, S Carrillo, E Casimiro, E Cuautle, A Sánchez-Hernández, C Uribe, F Vázquez, L Agostino, L Cinquini, J.P Cumalat, B O'Reilly, J.E Ramirez, I Segoni, M Wahl, J.N Butler, H.W.K Cheung, G Chiodini, I Gaines, P.H Garbincius, L.A Garren, E Gottschalk, P.H Kasper, A.E Kreymer, R Kutschke, L Benussi, S Bianco, F.L Fabbri, A Zallo, C Cawlfield, D.Y Kim, A Rahimi, J Wiss, R Gardner, A Kryemadhi, C.H Chang, Y.S Chung, J.S Kang, B.R Ko, J.W Kwak, K.B Lee, K Cho, H Park, G Alimonti, S Barberis, M Boschini, A Cerutti, P D'Angelo, M DiCorato, P Dini, L Edera, S Erba, M Giammarchi, P Inzani, F Leveraro, S Malvezzi, D Menasce, M Mezzadri, L Moroni, D Pedrini, C Pontoglio, F Prelz, M Rovere, S Sala, T.F Davenport, V Arena, G Boca, G Bonomi, G Gianini, G Liguori, M.M Merlo, D Pantea, D Lopes Pegna, S.P Ratti, C Riccardi, P Vitulo, H Hernandez, A.M Lopez, E Luiggi, H Mendez, A Paris, J Quinones, W Xiong, Y Zhang, J.R Wilson, T Handler, R Mitchell, D Engh, M Hosack, W.E Johns, M Nehring, P.D Sheldon, K Stenson, E.W Vaandering, M Webster, and M Sheaff

Subjects
Physics, Baryon, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences, Omega
Abstract

The FOCUS experiment(FNAL-E831) has used two channels, $\Omega^- \pi^+$ and $\Xi^-K^- \pi^+ \pi^+$,to measure the lifetime of the $\Omega_c^0$ charmed baryon. From a sample of $64 \pm 14$ signal events at a mass of 2.698 GeV/$c^2$, we measure an $\Omega_c^0$ lifetime of $72 \pm 11$ (stat.) $\pm 11$ (sys.) fs, substantially improving upon the current world average.

Published
2003
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9. A new measurement of the Ξ0 lifetime

Author

J.M Link, M Reyes, P.M Yager, J.C Anjos, I Bediaga, C Göbel, J Magnin, A Massafferri, J.M de Miranda, I.M Pepe, A. C dos Reis, S Carrillo, E Casimiro, E Cuautle, A Sánchez-Hernández, C Uribe, F Vázquez, L Agostino, L Cinquini, J.P Cumalat, B O'Reilly, J.E Ramirez, I Segoni, J.N Butler, H.W.K Cheung, G Chiodini, I Gaines, P.H Garbincius, L.A Garren, E Gottschalk, P.H Kasper, A.E Kreymer, R Kutschke, L Benussi, S Bianco, F.L Fabbri, A Zallo, C Cawlfield, D.Y Kim, K.S Park, A Rahimi, J Wiss, R Gardner, A Kryemadhi, K.H Chang, Y.S Chung, J.S Kang, B.R Ko, J.W Kwak, K.B Lee, K Cho, H Park, G Alimonti, S Barberis, A Cerutti, M Boschini, P D'Angelo, M DiCorato, P Dini, L Edera, S Erba, M Giammarchi, P Inzani, F Leveraro, S Malvezzi, D Menasce, M Mezzadri, L Moroni, D Pedrini, C Pontoglio, F Prelz, M Rovere, S Sala, T.F Davenport, V Arena, G Boca, G Bonomi, G Gianini, G Liguori, M.M Merlo, D Pantea, S.P Ratti, C Riccardi, P Vitulo, H Hernandez, A.M Lopez, H Mendez, L Mendez, E Montiel, D Olaya, A Paris, J Quinones, C Rivera, W Xiong, Y Zhang, J.R Wilson, T Handler, R Mitchell, D Engh, M Hosack, W.E Johns, M Nehring, P.D Sheldon, K Stenson, E.W Vaandering, M Webster, and M Sheaff

Subjects
Physics, Baryon, Nuclear and High Energy Physics, Crystallography, Particle physics, Omega, High Energy Physics - Experiment
Abstract

Using data collected by the Fermilab experiment FOCUS, we measure the lifetime of the charmed baryon (\Xi_{c}^{o}) using the decay channels (\Xi_{c}^{o}\to \Xi ^{-}\pi ^{+}) and (\Xi_{c}^{o}\to \Omega ^{-}K^{+}). From a combined sample of (110\pm 17) events we find (\tau (\Xi_{c}^{o}) =~118^{+ 14}_{- 12} \pm5) fs, where the first and second errors are statistical and systematic, respectively., Comment: 13 pages, 5 figures

Published
2002
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10. Measurements of relative branching ratios of Λ+ decays into states containing Σ

Author

J.M. Link, M. Reyes, P.M. Yager, J.C. Anjos, I. Bediaga, C. Göbel, J. Magnin, A. Massafferri, J.M. de Miranda, I.M. Pepe, A.C. dos Reis, S. Carrillo, E. Casimiro, E. Cuautle, A. Sánchez-Hernández, C. Uribe, F. Vázquez, L. Agostino, L. Cinquini, J.P. Cumalat, B. O'Reilly, J.E. Ramirez, I. Segoni, J.N. Butler, H.W.K. Cheung, G. Chiodini, I. Gaines, P.H. Garbincius, L.A. Garren, E. Gottschalk, P.H. Kasper, A.E. Kreymer, R. Kutschke, L. Benussi, S. Bianco, F.L. Fabbri, A. Zallo, C. Cawlfield, D.Y. Kim, K.S. Park, A. Rahimi, J. Wiss, R. Gardner, A. Kryemadhi, K.H. Chang, Y.S. Chung, J.S. Kang, B.R. Ko, J.W. Kwak, K.B. Lee, K. Cho, H. Park, G. Alimonti, S. Barberis, A. Cerutti, M. Boschini, P. D'Angelo, M. DiCorato, P. Dini, L. Edera, S. Erba, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Moroni, D. Pedrini, C. Pontoglio, F. Prelz, M. Rovere, S. Sala, T.F. Davenport, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, M.M. Merlo, D. Pantea, S.P. Ratti, C. Riccardi, P. Vitulo, H. Hernandez, A.M. Lopez, H. Mendez, L. Mendez, E. Montiel, D. Olaya, A. Paris, J. Quinones, C. Rivera, W. Xiong, Y. Zhang, J.R. Wilson, T. Handler, R. Mitchell, D. Engh, M. Hosack, W.E. Johns, M. Nehring, P.D. Sheldon, K. Stenson, E.W. Vaandering, M. Webster, and M. Sheaff

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Crystallography, High Energy Physics::Phenomenology, Sigma, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Branching (polymer chemistry), Lambda, Astrophysics::Galaxy Astrophysics
Abstract

We have studied the Cabibbo suppressed decay (\Lambda_{c}^{+}\to \Sigma ^{+}K^{*0}(892)) and the Cabibbo favored decays (\Lambda_{c}^{+}\to \Sigma ^{+}K^{+}K^{-}), (\Lambda_{c}^{+}\to \Sigma ^{+}\phi) and (\Lambda_{c}^{+}\to \Xi ^{*0}(\Sigma^{+}K^{-})K^{+}) and measured their branching ratios relative to (\Lambda_{c}^{+}\to \Sigma ^{+}\pi ^{+}\pi ^{-}) to be ((7.8\pm 1.8\pm 1.3)%), ((7.1\pm 1.1\pm 1.1)%), ((8.7\pm 1.6\pm 0.6)%) and ((2.2\pm 0.6\pm 0.6)%), respectively. The first error is statistical and the second is systematic. We also report two 90% confidence level limits (\Gamma (\Lambda_{c}^{+}\to \Sigma ^{-}K^{+}\pi ^{+})/\Gamma (\Lambda_{c}^{+}\to \Sigma^{+}K^{*0}(892))

Published
2002
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11. Evidence for a narrow dip structure at 1.9 GeV/c2 in 3π+3π− diffractive photoproduction

Author

P.L. Frabetti, H.W.K. Cheung, J.P. Cumalat, C. Dallapiccola, J.F. Ginkel, W.E. Johns, M.S. Nehring, E.W. Vaandering, J.N. Butler, S. Cihangir, I. Gaines, P.H. Garbincius, L. Garren, S.A. Gourlay, D.J. Harding, P. Kasper, A. Kreymer, P. Lebrun, S. Shukla, M. Vittone, R. Baldini-Ferroli, S. Bianco, F.L. Fabbri, S. Sarwar, A. Zallo, C. Cawlfield, R. Culbertson, R.W. Gardner, E. Gottschalk, R. Greene, K. Park, A. Rahimi, J. Wiss, G. Alimonti, G. Bellini, M. Boschini, D. Brambilla, B. Caccianiga, L. Cinquini, M. DiCorato, P. Dini, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, E. Meroni, L. Milazzo, L. Moroni, D. Pedrini, L. Perasso, F. Prelz, A. Sala, S. Sala, D. Torretta, D. Buchholz, D. Claes, B. Gobbi, B. O'Reilly, J.M. Bishop, N.M. Cason, C.J. Kennedy, G.N. Kim, T.F. Lin, D.L. Puseljic, R.C. Ruchti, W.D. Shephard, J.A. Swiatek, Z.Y. Wu, V. Arena, G. Boca, G. Bonomi, C. Castoldi, G. Gianini, M. Merlo, S.P. Ratti, C. Riccardi, L. Viola, P. Vitulo, A.M. Lopez, L. Mendez, A. Mirles, E. Montiel, D. Olaya, J.E. Ramirez, C. Rivera, Y. Zhang, J.M. Link, V.S. Paolone, P.M. Yager, J.R. Wilson, J. Cao, M. Hosack, P.D. Sheldon, F. Davenport, K. Cho, K. Danyo, T. Handler, B.G. Cheon, Y.S. Chung, J.S. Kang, K.Y. Kim, K.B. Lee, and S.S. Myung

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Structure (category theory), Fermilab, High Energy Physics - Experiment
Abstract

A narrow dip structure has been observed at 1.9 GeV/c$^2$ in a study of diffractive photoproduction of the $~3\pi^+3\pi^-$ final state performed by the Fermilab experiment E687., Comment: The data of Figure 6 can be obtained by downloading the raw data file e687_6pi.txt. v5 (2nov2018): added Fig. 7, the 6 pion energy distribution as requested by a reader

Published
2001
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12. Measurement of the relative branching ratio BR(Ξc+→p+K−π+)/BR(Ξc+→Ξ−π+π+)

Author

J.M. Link, M. Reyes, P.M. Yager, J.C. Anjos, I. Bediaga, C. Göbel, J. Magnin, A. Massafferri, J.M. de Miranda, I.M. Pepe, A.C. dos Reis, F.R.A. Simão, S. Carrillo, E. Casimiro, A. Sánchez-Hernández, C. Uribe, F. Vázquez, L. Cinquini, J.P. Cumalat, B. O'Reilly, J.E. Ramirez, E.W. Vaandering, J.N. Butler, H.W.K. Cheung, I. Gaines, P.H. Garbincius, L.A. Garren, E. Gottschalk, P.H. Kasper, A.E. Kreymer, R. Kutschke, S. Bianco, F.L. Fabbri, S. Sarwar, A. Zallo, C. Cawlfield, D.Y. Kim, A. Rahimi, J. Wiss, R. Gardner, Y.S. Chung, J.S. Kang, B.R. Ko, J.W. Kwak, K.B. Lee, H. Park, G. Alimonti, M. Boschini, B. Caccianiga, P. D'Angelo, M. DiCorato, P. Dini, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Milazzo, L. Moroni, D. Pedrini, C. Pontoglio, F. Prelz, M. Rovere, A. Sala, S. Sala, T.F. Davenport III, L. Agostino, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, M.M. Merlo, D. Pantea, S.P. Ratti, C. Riccardi, I. Segoni, L. Viola, P. Vitulo, H. Hernandez, A.M. Lopez, H. Mendez, L. Mendez, A. Mirles, E. Montiel, D. Olaya, A. Paris, J. Quinones, C. Rivera, W. Xiong, Y. Zhang, J.R. Wilson, K. Cho, T. Handler, D. Engh, M. Hosack, W.E. Johns, M. Nehring, P.D. Sheldon, K. Stenson, M. Webster, and M. Sheaff

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, Pi, Analytical chemistry
Abstract

We report the observation of the Cabibbo suppressed decay \Xi_c^+ \to p K^-\pi^+ using data collected with the FOCUS spectrometer during the 1996--97 Fermilab fixed target run. We find a \Xi_c^+ signal peak of 202\pm35 events. We have measured the relative branching ratios BR(\Xi^+_c\to p K^-\pi^+)/BR(\Xi^+_c\to\Xi^-\pi^+\pi^+)= 0.234 \pm 0.047 \pm 0.022 and BR(\Xi^+_c\to p \bar{K}^*(892)^0)/BR(\Xi^+_c\to p K^-\pi^+)= 0.54 \pm 0.09 \pm 0.05 .

Published
2001
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13. The FINUDA superconducting magnet at DAΦNE

Author

A. Lanaro, V. Lucherini, F.L. Fabbri, A. Feliciello, B. Dulach, M. Bertani, A. Cecchetti, M. Giardoni, Tullio Bressani, A. Filippi, and Aldo Zenoni

Subjects
Physics, Cryostat, Nuclear and High Energy Physics, Electromagnet, Physics::Instrumentation and Detectors, Solenoid, Superconducting magnet, Atomic and Molecular Physics, and Optics, Particle detector, law.invention, Nuclear physics, law, Electromagnetic coil, Magnet, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider
Abstract

FINUDA is an experiment aiming at high resolution hypernuclear spectroscopy. It employs different types of detectors enclosed inside a large superconducting solenoid. It will operate on the new, high luminosity (e+ − e−) collider DAΦNE of the INFN Frascati National Laboratory. The solenoid operates at 2765 A maximum current corresponding to a magnetic field of 1.1 T. The inner dimensions are: 2.4 m length, 2.7 m diameter. The coil within its cryostat is enclosed inside an iron return yoke composed by a central barrel and two end-caps which can be opened to access the inner detectors. The magnetic field in the inner volume has been fully mapped for both main and minor components. The alignment of such a magnet on a machine as DAΦNE is a very crucial item, needing particular care.

Published
1999
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14. FINUDA and hypernuclei production at DAωNE

Author

N. Colonna, L. Fiore, Rinaldo Rui, S. Marcello, M. Bertani, A. Donzella, Felice Iazzi, D. R. Gill, A. Sharma, Paola Salvini, A. Olin, L. Venturelli, E. Rossetto, D. Calvo, Bruno Minetti, S. Sarwar, C. Guaraldo, S. Yen, S. Bianco, S. Costa, Paolo Montagna, G. D’Erasmo, N. Grion, Elena Botta, V. Lucherini, Paolo Camerini, Michelangelo Agnello, Armando Lanaro, G. R. Smith, P. Gianotti, V. Paticchio, A. Feliciello, L. Busso, Tullio Bressani, A. Filippi, E.M. Fiore, M. Corradini, V. Filippini, Aldo Zenoni, E. Lodi-Rizzini, C. Cattaneo, Alberto Rotondi, F.L. Fabbri, and A. Pantaleo

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Positron, Luminosity (scattering theory), law, Electron, Collider, Linear particle accelerator, law.invention
Abstract

The DAωNE project at the Laboratori Nazionali di Frascati (LNF) is an e + e − collider with electron and positron beams accelerated to 510 MeV by a Linac injector. DAωNE is designed to reach a top luminosity L ∼ 10 33 cm −2 s −1 , that is, to produce ∼4×10 3 ω (1020) s −1 . The hypernuclear research program at DAωNE relies on low-energy kaons, ∼ 16MeV, being produced by ω-meson decays at rest: ω → K − K + with a B.R.∼49%. In the initial stage, DAωNE will operate at a L ∼ 10 32 cm −2 s −1 , however the number of ω produced, and the large geometrical acceptance of the FINUDA detector, ∼ 3 sr , will allow a strong hypernuclear physics program to be pursued.

Published
1995
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15. Hypernuclear weak decay studies with FINUDA

Author

M. Agnello, L. Benussi, M. Bertani, H.C. Bhang, G. Bonomi, E. Botta, M. Bregant, T. Bressani, S. Bufalino, L. Busso, D. Calvo, P. Camerini, B. Dalena, F. De Mori, G. DʼErasmo, F.L. Fabbri, A. Feliciello, A. Filippi, E.M. Fiore, H. Fujioka, P. Gianotti, N. Grion, V. Lucherini, S. Marcello, N. Mirfakhrai, F. Moia, P. Montagna, O. Morra, T. Nagae, H. Outa, A. Pantaleo, V. Paticchio, S. Piano, R. Rui, G. Simonetti, R. Wheadon, A. Zenoni, M., Agnello, L., Benussi, M., Bertani, H. C., Bhang, G., Bonomi, E., Botta, Bregant, Marco, T., Bressani, S., Bufalino, L., Busso, D., Calvo, Camerini, Paolo, B., Dalena, F., De Mori, G., D’Erasmo, F. L., Fabbri, A., Feliciello, A., Filippi, E. M., Fiore, H., Fujioka, P., Gianotti, N., Grion, V., Lucherini, S., Marcello, N., Mirfakhrai, F., Moia, P., Montagna, O., Morra, T., Nagae, H., Outa, A., Pantaleo, V., Paticchio, Piano, Stefano, Rui, Rinaldo, G., Simonetti, R., Wheadon, and A., Zenoni

Subjects
Physics, hypernuclei, Nuclear and High Energy Physics, Nuclear Theory, Width ratio, Kinetic energy, weak decay, Coincidence, Spectral line, mesonic weak decay, non-mesonic weak decay, two-nucleon induced decay, mesonic decay, Nuclear physics, hypernuclei, weak decay, mesonic decay, Proton spectra, High Energy Physics::Experiment, Neutron, Atomic physics, Nuclear Experiment
Abstract

The FINUDA experiment has recently completed an extensive study of the weak decay of p-shell Λ-hypernuclei including both mesonic and non-mesonic modes. Charged mesonic decay rates have been determined based on the analysis of π − kinetic energy spectra, never measured before. The study of proton spectra from non-mesonic weak decay for p-shell hypernuclei, both single and in coincidence with a neutron, has triggered the investigation of the two-nucleon induced Λ N N → n N N decay channel: its weight has been evaluated to be Γ 2 / Γ N M = 0.21 ± 0.07 stat − 0.02 sys + 0.03 sys . Finally, a direct experimental evidence of the occurrence of the weak reaction Λ n p → n n p in nuclei is presented for the first time. Three events have been found which can be attributed to Li Λ 7 and Be Λ 9 two-nucleon induced non-mesonic weak decay; the kinematical analysis is discussed here.

Published
2012

16. Analysis of the decay mode

Author

P.L. Frabetti, G.P. Grim, V.S. Paolone, P.M. Yager, C.W. Bogart, H.W.K. Cheung, S. Culy, J.P. Cumalat, C. Dallapicola, J.F. Ginkel, S.V. Greene, W.E. Johns, M.S. Nehring, J.N. Butler, S. Cihangir, I. Gaines, P.H. Garbincius, L. Garren, S. Gourlay, D.J. Harding, P. Kasper, A. Kreymer, P. Lebrun, H. Mendez, S. Shukla, S. Bianco, F.L. Fabbri, S. Sarwar, A. Spallone, A. Zallo, R. Culbertson, R.W. Gardner, R. Greene, G. Jaross, K. Lingel, J. Wiss, B.G. Cheon, J.S. Kang, K.Y. Kim, G. Alimonti, G. Bellini, B. Caccianiga, L. Cinquini, M. Di Corato, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, E. Meroni, L. Moroni, D. Pedrini, L. Perasso, S. Sala, D. Torretta, M. Vittone, F. Davenport, J.F. Filasetta, D. Buchholz, D. Claes, B. Gobbi, B. O'Reilly, S. Park, R. Yoshida, J.M. Bishop, J.K. Busenitz, N.M. Cason, J.D. Cunningham, C.J. Kenney, G.N. Kim, T.F. Lin, E.J. Mannel, R.J. Mountain, D.L. Puseljic, R.C. Ruchti, W.D. Shephard, J.A. Swiatek, Z.Y. Wu, M.E. Zanabria, V. Arena, G. Boca, C. Castoldi, R. Diaferia, G. Gianini, S.P. Ratti, C. Riccardi, P. Vitulo, A. Lopez, J.R. Wilson, G.R. Blackett, M. Pisharody, T. Handler, and P.D. Sheldon

Subjects
Semileptonic decay, Physics, Nuclear physics, Nuclear and High Energy Physics, chemistry, Branching fraction, Mass spectrum, Mode (statistics), Form factor (quantum field theory), chemistry.chemical_element, Beryllium, Neutrino
Published
1993
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17. Correlated Λt pairs from the absorption of K- at rest in light nuclei

Author

Rinaldo Rui, S. Marcello, Adriano Fontana, S. Piano, D. Faso, Michiko Sekimoto, O. Hartmann, Alexey Krasnoperov, F. Pompili, A. Panzarasa, Haruhiko Outa, L. Busso, L. Benussi, V. Lenti, G. D'Erasmo, Tomofumi Nagae, Marco Bregant, Y. Lee, A. Feliciello, H. C. Bhang, A. Filippi, M. Bertani, Germano Bonomi, Tullio Bressani, V. Paticchio, F. De Mori, P. Gianotti, G. A. Beer, Paolo Montagna, B. H. Kang, N. Mirfakhrai, V. Manzari, D. Calvo, O. Morra, M. Palomba, F.L. Fabbri, R. Wheadon, D. Nakajima, A. Andronenkov, Hiroyuki Fujioka, V. Lucherini, E. Pace, N. Grion, Michele Arturo Caponero, Paolo Camerini, Akihisa Toyoda, Aldo Zenoni, Tomofumi Maruta, E. M. Fiore, D. Elia, E. Botta, Michelangelo Agnello, B. Dalena, G. Simonetti, A. Pantaleo, V. Tereshchenko, Stefania Bufalino, M., Agnello, A., Andronenkov, G., Beer, L., Benussi, M., Bertani, H. C., Bhang, G., Bonomi, E., Botta, M., Bregant, T., Bressani, S., Bufalino, L., Busso, D., Calvo, Camerini, Paolo, M., Caponero, B., Dalena, F., DE MORI, G., D'Erasmo, D., Elia, F. L., Fabbri, D., Faso, A., Feliciello, A., Filippi, E. M., Fiore, A., Fontana, H., Fujioka, P., Gianotti, N., Grion, O., Hartmann, B., Kang, A., Krasnoperov, Y., Lee, V., Lenti, V., Lucherini, V., Manzari, S., Marcello, T., Maruta, N., Mirfakhrai, P., Montagna, O., Morra, T., Nagae, D., Nakajima, H., Outa, E., Pace, M., Palomba, A., Pantaleo, A., Panzarasa, V., Paticchio, S., Piano, F., Pompili, Rui, Rinaldo, M., Sekimoto, G., Simonetti, V., Tereshchenko, A., Toyoda, and R. WHEADON AND A., Zenoni

Subjects
Physics, Nuclear and High Energy Physics, Light nucleus, Range (particle radiation), Spectrometer, 010308 nuclear & particles physics, stati legati di kaoni su nuclei, correlazioni tra particelle, Few-body systems, 01 natural sciences, Yield (chemistry), Hypernuclei, nuclear reactions, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Absorption (electromagnetic radiation), Reaction modeling
Abstract

Novel data from the $K^{-}_{stop}A$ absorption reaction in light nuclei $^{6,7}$Li and $^{9}$Be are presented. The study aimed at finding $\Lambda t$ correlations. Regardless of $A$, the $\Lambda t$ pairs are preferentially emitted in opposite directions. Reaction modeling predominantly assigns to the $K^-_{stop}A\to\Lambda t(N)A'$ direct reactions the emission of the $\Lambda t$ pairs whose yield is found to range from $10^{-3}$ to $10^{-4}$$/K^-_{stop}$. The experiment was performed with the FINUDA spectrometer at DA$\Phi$NE (LNF)., Comment: 11 pages, 5 figures, accepted for publication in Phys. Lett. B

Published
2008

18. DAΦNE monitored by FINUDA

Author

Germano Bonomi, R. Fini, M. Palomba, P. Cerello, V. Manzari, H. So, P. Gianotti, V. Tereschenko, A. Pantaleo, O. Morra, V. Filippini, D. Di Santo, T. Maruta, V. Lucherini, Tomofumi Nagae, M. Pallotta, A. Feliciello, M. Agnello, Haruhiko Outa, Stefano Bianco, M. E. Fiore, L. Benussi, B. Kang, F. De Mori, Alexey Krasnoperov, D. Elia, S. Marcello, A. Panzarasa, Sandro Tomassini, L. Busso, A. Filippi, A. Zenoni, E. Botta, V. Paticchio, F. Pompili, V. Lenti, N. Grion, E. Pace, D. Calvo, M. Bertani, R. Rui, G. D’Erasmo, N. Mirfakhrai, T. Bressani, R. Wheadon, B. Dalena, Marco Bregant, P. Camerini, D. Faso, G. Simonetti, S. Piano, H. C. Bhang, F.L. Fabbri, Hiroyuki Fujioka, M., Agnello, L., Benussi, M., Bertani, H. C., Bhang, S., Bianco, G., Bonomi, E., Botta, M., Bregant, T., Bressani, L., Busso, D., Calvo, Camerini, Paolo, P., Cerello, B., Dalena, F., DE MORI, G., Derasmo, D., DI SANTO, D., Elia, F. L, Fabbri, D., Faso, A., Feliciello, A., Filippi, V., Filippini, R., Fini, M. E., Fiore, H., Fujioka, P., Gianotti, N., Grion, B., Kang, A., Krasnoperov, V., Lucherini, V., Lenti, V., Manzari, S., Marcello, T., Maruta, N., Mirfakhrai, O., Morra, T., Nagae, H., Outa, E., Pace, M., Pallotta, M., Palomba, A., Pantaleo, A., Panzarasa, V., Paticchio, S., Piano, F., Pompili, Rui, Rinaldo, G., Simonetti, H., So, V., Tereschenko, S., Tomassini, R., Wheadon, and A., Zenoni

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Spectrometer, Collision, law.invention, Nuclear physics, Momentum, law, Physics::Accelerator Physics, Nuclear Experiment, Collider, Instrumentation, Energy (signal processing), ComputingMethodologies_COMPUTERGRAPHICS
Abstract

The FINUDA spectrometer, devoted to hypernuclear physics and installed on the DAΦNE two rings collider at the Laboratori Nationali di Frascati, is able to monitor the relevant machine parameters, as luminosity, collision vertexes, c.m. energy and transversal momentum boost, during the process of data taking to study hypernuclear physics without affecting it. The collider parameters relevant to optimize the machine performances to the needs of the experiment are measured both on-line and offline in a run-to-run basis, in an efficient, redundant way, allowing the continuous extraction of reliable and cross-checked information on the machine working conditions.

Published
2007

19. Proposal for a Systematic Study of the CERN Closed Loop Gas System Used by the RPC Muon Detectors in CMS

Author

M. Abbrescia, A. Colaleo, R. Guida, G. Iaselli, R. Liuzzi, F. Loddo, M. Maggi, B. Marangelli, S. Natali, S. Nuzzo, G. Pugliese, A. Ranieri, F. Romano, R. Trentadue, L. Benussi, M. Bertani, S. Bianco, M.A. Caponero, D. Colonna, D. Donisi, F.L. Fabbri, F. Felli, M. Giardoni, B. Ortenzi, M. Pallotta, A. Paolozzi, L. Passamonti, B. Ponzio, C. Pucci, G. Saviano, G. Polese, I. Segoni, N. Cavallo, F. Fabozzi, P. Paolucci, D. Piccolo, C. Sciacca, G. Belli, A. Grelli, M. Necchi, S.P. Ratti, C. Riccardi, P. Torre, and P. Vitulo

Subjects
Physics::Instrumentation and Detectors, Physics::Accelerator Physics, High Energy Physics::Experiment
Abstract

We propose to study features, optimization and commissioning of the CERN Closed Loop gas system used by the RPC muon detectors in experiment CMS at the LHC. Studies include a three-phase campaign both in low-radiation (cosmic rays at the CERN ISR test site) and high-radiation (at the CERN Gamma Irradiation Facility) environment. We describe dedicated RPC chambers tests and chemical analysis of filters and gas used which will allow us to fully characterize the Closed Loop system in view of the upcoming commissioning of the CMS RPC detector.

Published
2006
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20. Omega-Like Fiber Bragg Grating Sensors as Position Monitoring Device: A Possible Pixel Position Detector in CMS?

Author

S. Bianco, M.A.Caponero, F.L. Fabbri, and A.Paolozzi

Subjects
Physics::Instrumentation and Detectors, Physics::Optics, High Energy Physics::Experiment
Abstract

We make the exercise of considering the possible use of FBG sensors as a position device for the pixel detector of experiment CMS at LHC (CERN). We discuss the main features of FBG sensors, describe their use in HEP which we pionereed with the FINUDA experiment at DAFNE and developed for the BTeV experiment R&D at Frascati. We show results including long term stability, resolution, radiation hardness and characterization of Fiber Grating Sensors used to monitor structure deformation, repositioning and surveying of silicon detector in High Energy Physics. We discuss alignment issues in CMS silicon trackers and we evaluate a possible use of FBG sensors in the experiment.

Published
2006
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21. A Novel Approach for an Integrated Straw tube-Microstrip Detector

Author

E. Basile, F. Bellucci, L. Benussi, M. Bertani, S. Bianco, M.A. Caponero, D. Colonna, F. Di Falco, F.L. Fabbri, F. Felli, M. Giardoni, A. La Monaca, G. Mensitieri, B. Ortenzi, M. Pallotta, A. Paolozzi, L. Passamonti, D. Pierluigi, C. Pucci, A. Russo, G. Saviano, F. Casali, M. Bettuzzi, D. Bianconi, F. Baruffaldi, E. Perilli, F. Massa, E. b., Basile, Bellucci, Francesco, L., Benussi, M., Bertani, S., Bianco, M. d., Caponero, D. b., Colonna, F. b., Di, F., Fabbri, F. b., Felli, M., Giardoni, A. L., Monaca, G. c., Mensitieri, B., Ortenzi, M., Pallotta, A. b., Paolozzi, L., Passamonti, D., Pierluigi, C. b., Pucci, A., Russo, G. b., Saviano, F., Casali, M., Bettuzzi, D., Bianconi, F., Baruffaldi, E., Perilli, F., Massa, Basile E., Bellucci F., Benussi L., Bertani M., Bianco S., Caponero M.A., Colonna D., Di Falco F., Fabbri F.L., Felli F., Giardoni M., La Monaca A., Mensitieri G., Ortenzi B., Pallotta M., Paolozzi A., Passamonti L., Pierluigi D., Pucci D., Russo A., Saviano G., Casali F., Bettuzzi M., Bianconi D., Baruffaldi F., Perilli E., and Massa F.

Subjects
Straw tube, Nuclear and High Energy Physics, Materials science, Physics - Instrumentation and Detectors, Silicon, Mechanical tension, Silicon microstrips, Test beam performances, Tracking, Detector, elementary particles, chemistry.chemical_element, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Fibre-reinforced plastic, Straw, tracking, Microstrip devices, Mechanical tension, Carbon fiber reinforced plastics, Crystal lattices, Elementary particles, Mechanical properties, Performance, Radiation detectors, Tensile testing, Nuclear Energy and Engineering, Test beam, chemistry, Electrical and Electronic Engineering, Composite material, Silicon microstrip detectors, detectors
Abstract

We report on a novel concept of silicon microstrips and straw tubes detector, where integration is accomplished by a straw module with straws not subjected to mechanical tension in a Rohacell $^{\circledR}$ lattice and carbon fiber reinforced plastic shell. Results on mechanical and test beam performances are reported on as well., Accepted by Transactions on Nuclear Science (2005). 11 pages, 9 figures, uses lnfprep.sty

Published
2005

22. Two-And Three-Dimensional Reconstruction and Analysis of the Straw Tubes Tomography in the BTeV Experiment

Author

E.Basile, F.Bellucci, L. Benussi, M. Bertani, S. Bianco, M.A. Caponero, D. Colonna, F. Di Falco, F.L. Fabbri, F. Felli, M. Giardoni, A. La Monaca, F.Massa, G. Mensitieri, B. Ortenzi, M. Pallotta, A. Paolozzi, L. Passamonti, D.Pierluigi, C. Pucci, A. Russo, and G. Saviano

Abstract

A check of the eccentricity of the aluminised kapton straw tubes used in the BTeV experiment is accomplished using X-ray tomography of the section of tubes modules. 2 and 3-dimensional images of the single tubes and of the modules are reconstructed and analysed. Preliminary results show that a precision better than 40 μm can be reached on the measurement of the straw radii.

Published
2005
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23. Micrometric Position Monitoring Using Fiber Bragg Gratin Sensors in Silicon Detectors

Author

E.Basile, F.Bellucci, L. Benussi, M. Bertani, S. Bianco, M.A. Caponero, D. Colonna, F. Di Falco, F.L. Fabbri, F. Felli, M.Giardoni, A. La Monaca, F.Massa, G. Mensitieri, B. Ortenzi, M. Pallotta, A. Paolozzi, L. Passamonti, D. Pierluigi, C. Pucci, A. Russo, and G. Saviano

Subjects
Physics::Instrumentation and Detectors, Physics::Optics
Abstract

We show R&D results including long term stability,resolution, radiation hardness and characterization of Fiber Grating sensors used to monitor structure deformation, repositioning and surveying of silicon detector in High Energy Physics.

Published
2005
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24. A new configuration for a straw tubemicrostrip detector

Author

E. Basile, F. Bellucci, L. Benussi, M. Bertani, S. Bianco, M.A. Caponero, D. Colonna, F. Di Falco, F.L. Fabbri, F. Felli, M. Giardoni, A. La Monaca, G. Mensitieri, B. Ortenzi, M. Pallotta, A. Paolozzi, L. Passamonti, D. Pierluigi, C. Pucci, A. Russo, G. Saviano, and S. Tomassini

Subjects
Straw tube, Materials science, Silicon, chemistry, Detector, chemistry.chemical_element, Composite material, Fibre-reinforced plastic, Straw, Mechanical tension, Silicon radiation detectors, Silicon microstrip detectors
Abstract

We report on a novel concept of silicon microstrips and straw tubes detector, where integration is accomplished by a straw module with straws not subjected to mechanical tension in a Rohacell/spl reg/ lattice and carbon fiber reinforced plastic shell.

Published
2005
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25. Evidence for a Kaon-Bound StateK−ppProduced inK−Absorption Reactions at Rest

Author

F. De Mori, M. Palomba, H. So, E. Pace, M. Bertani, B. Dalena, N. Mirfakhrai, A. Pantaleo, O. Morra, G. A. Beer, D. Di Santo, G. Simonetti, A. Filippi, V. Filippini, Stefano Bianco, V. Paticchio, M. Agnello, A. Zenoni, R. Rui, T. Maruta, P. Cerello, A. Feliciello, A. Olin, V. Lucherini, E. M. Fiore, N. Grion, Tomofumi Nagae, D. Faso, D. Calvo, P. Gianotti, Akihiro Toyoda, L. Busso, P. Camerini, S. Piano, F.L. Fabbri, R. Wheadon, Hiroyuki Fujioka, S. Marcello, E. Botta, F. Pompili, G. D’Erasmo, Haruhiko Outa, L. Benussi, Sandro Tomassini, A. Panzarasa, and T. Bressani

Subjects
Physics, Proton, Meson, Nuclear Theory, Binding energy, Hyperon, General Physics and Astronomy, Resonance, Nuclear physics, Particle decay, Bound state, High Energy Physics::Experiment, Absorption (logic), Atomic physics, Nuclear Experiment
Abstract

We have searched for a deeply bound kaonic state by using the FINUDA spectrometer installed at the e{sup +}e{sup -} collider DA{phi}NE. Almost monochromatic K{sup -}'s produced through the decay of {phi}(1020) mesons are used to observe K{sup -} absorption reactions stopped on very thin nuclear targets. Taking this unique advantage, we have succeeded to detect a kaon-bound state K{sup -}pp through its two-body decay into a {lambda} hyperon and a proton. The binding energy and the decay width are determined from the invariant-mass distribution as 115{sub -5}{sup +6}(stat){sub -4}{sup +3}(syst) MeV and 67{sub -11}{sup +14}(stat){sub -3}{sup +2}(syst) MeV, respectively.

Published
2005
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26. Il Progetto ScienzaPerTutti:la Fisica in Rete

Author

L. Benussi, H. Bilokon, R. Baldini, P. De Simone, A. C. De Vitis, E. Durante, F.L. Fabbri, G. Isidori, G. Nicoletti, P. Modestino, P. Patteri, C. Petrascu, S. P. Ratti, F. R. Romano, D. Sirghi, and P. Valente

Abstract

ScienzaPerTutti (http://scienzapertutti.lnf.infn.it) sviluppa un progetto di comunicazione/divulgazione sui temi della scienza, rivolto al pubblico generico con particolare attenzione al mondo della scuola. Realizzato da ricercatori dei Laboratori Nazionali di Frascati dell'NFN, in due anni ha totalizzato oltre 1500000 accessi. Caratteristiche qualificanti sono: comunicazione diretta tra chi produce e chi fruisce della scienza; dichiarata contaminabilità; agli idiomi comunicativi del mondo giovanile; dinamicità; dei contenuti che qualificano il sito, più che come opportunità; occasionale di visita, come periodico evento-appuntamento in rete. Lo sviluppo del progetto si basa su un comitato redazionale permanente, sulla collaborazione d'esperti, ma anche sui contributi dei web-nauti visitatori.

Published
2005
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27. First results from the FINUDA experiment

Author

M. Bertani, P. Camerini, N. Mirfakhrai, S. Piano, P. Cerello, Stefano Bianco, P. Gianotti, G. D’Erasmo, F. De Mori, G. A. Beer, G. Simonetti, T. Maruta, R. Wheadon, T. Bressani, D. Di Santo, A. Pantaleo, O. Morra, E. Pace, A. Olin, A. Filippi, V. Paticchio, V. Lucherini, L. Benussi, R. Rui, A. Feliciello, D. Faso, L. Busso, F. Pompili, Sandro Tomassini, B. Dalena, F.L. Fabbri, Hiroyuki Fujioka, M. Pallotta, M. Palomba, A. Krasnoperov, V. Filippini, M. Agnello, A. Zenoni, N. Grion, D. Calvo, E. M. Fiore, H. So, E. Botta, S. Marcello, A. Panzarasa, M., Agnello, G., Beer, L., Benussi, M., Bertani, S., Bianco, E., Botta, T., Bressani, L., Busso, D., Calvo, Camerini, Paolo, P., Cerello, B., Dalena, F., DE MORI, G., D'Erasmo, D., DI SANTO, F. L., Fabbri, D., Faso, A., Feliciello, A., Filippi, V., Filippini, E. M., Fiore, H., Fujioka, P., Gianotti, N., Grion, A., Krasnoperov, V., Lucherini, S., Marcello, T., Maruta, N., Mirfakhrai, O., Morra, A., Olin, E., Pace, M., Pallotta, M., Palomba, A., Pantaleo, A., Panzarasa, V., Paticchio, S., Piano, F., Pompili, Rui, Rinaldo, G., Simonetti, H., So, S., Tomassini, R., Wheadon, and A., Zenoni

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Range (particle radiation), Field (physics), Nuclear Theory, High Energy Physics::Experiment, LAMBDA-HYPERNUCLEI, Atomic physics, Nuclear Experiment, Physics::History of Physics
Abstract

This paper provides a summary of the first results obtained by the FINUDA Collaboration in the field of hypernuclear physics. They range from the spectroscopic study of several A-hypernuclei to the observation of some non-mesonic decay modes. Hints on rare hypernuclear two-body decays, on neutron-rich hypernuclei and on deeply-bound kaonic nuclei are also reported.

Published
2005

28. First results from the FINUDA experiment at DAΦNE

Author

H. Fujioka, A. Zenoni, M. Bertani, G. A. Beer, Tullio Bressani, Rinaldo Rui, A. Olin, P. Gianotti, S. Tomassini, N. Grion, F. De Mori, Michelangelo Agnello, E. Pace, S. Piano, O. Morra, N. Mirfakhrai, G. Simonetti, T. Maruta, R. Wheadon, A. Panzarasa, L. Busso, Paolo Camerini, G. D’Erasmo, D. Calvo, A. Feliciello, D. Faso, P. Cerello, V. Filippini, A. Filippi, F. Pompili, D. Di Santo, V. Paticchio, S. Bianco, A. Pantaleo, L. Benussi, H. So, V. Lucherini, E.M. Fiore, F.L. Fabbri, S. Marcello, Elena Botta, M. Palomba, A. Krasnoperov, B. Dalena, M., Agnello, G., Beer, L., Benussi, M., Bertani, S., Bianco, E., Botta, T., Bressani, L., Busso, D., Calvo, Camerini, Paolo, P., Cerello, B., Dalena, F., DE MORI, G., D'Erasmo, D., DI SANTO, F. L., Fabbri, D., Faso, A., Feliciello, A., Filippi, V., Filippini, E. M., Fiore, H., Fujioka, P., Gianotti, N., Grion, A., Krasnoperov, V., Lucherini, S., Marcello, T., Maruta, N., Mirfakhrai, O., Morra, A., Olin, E., Pace, Pallotta, M, M., Palomba, A., Pantaleo, A., Panzarasa, V., Paticchio, S., Piano, F., Pompili, Rui, Rinaldo, G., Simonetti, So, H, S., Tomassini, R., Wheadon, and A., Zenoni

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Spectrometer, Meson, Detector, Detector calibration, Strangeness, Excitation, Spectral line
Abstract

In spring 2003 the FINUDA detector was installed at the ϕ factory DAΦNE in the Laboratori Nazionali di Frascati of INFN (Italy). In October 2003 the commissioning of the apparatus was accomplished and the first data taking started with a set of nuclear targets 6 Li, 7 Li, nat C, 27 Al, 51 V. The data collection will continue until a total integrated luminosity of 250 pb −1 is recorded. Light and medium A hypernuclei will be abundantly produced by the strangeness exchange reaction induced by the stopped K − coming from the decay of ϕ ( 1020 ) mesons. The aim of the experiment is to simultaneously measure the excitation energy spectra of the produced hypernuclei, with a resolution better than 1 MeV, the lifetime of the Λ embedded in the different hypernuclei and the partial widths Γ π , Γ n p and Γ n n for mesonic and non-mesonic hypernuclear decays. Information on neutron-rich hypernuclei and rare hypernuclear two-body decays might be available too, with the statistics that will be collected at the end of the run. In the present paper, first results concerning in-beam detector calibration, spectrometer performances and very preliminary hypernuclear formation and decay spectra will be presented.

Published
2005

29. The FINUDA straw tubes detector

Author

L Benussi, M Bertani, S Bianco, F.L Fabbri, P Gianotti, M Giardoni, C Guaraldo, A Lanaro, V Lucherini, A Mecozzi, L Passamonti, V Russo, and S Sarwar

Subjects
Nuclear and High Energy Physics, Instrumentation
Published
1996
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30. A Novel Approach for an Integrated Straw Tube-Microstrip Detector

Author

E. Basile, F. Bellucci, L. Benussi, M. Bertani, S. Bianco, M.A. Caponero, D. Colonna, F. Di Falco, F.L. Fabbri, F. Felli, M. Giardoni, A. La Monaca, G. Mensitieri, B. Ortenzi, M. Pallotta, A. Paolozzi, L. Passamonti, D.Pierluigi, C. Pucci, A. Russo, G. Savian, and S. Tomassini

Abstract

We report on a novel concept of silicon microstrips and straw tubes detector, where integration is accomplished by a straw module with straws not subjected to mechanical tension in a Rohacell lattice and carbon fiber reinforced plastic shell. Results on mechanical and test beam performances are reported on as well.

Published
2004
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31. A New Configuration for a Strawtubes - MicrostripsDetector

Author

E. Basile, F. Bellucci, L. Benussi, M. Bertani, S. Bianco, M.A. Caponero, D. Colonna, F. Di Falco, F.L. Fabbri, F. Felli, M. Giardoni, A. La Monaca, G. Mensitieri, B. Ortenzi, M. Pallotta, A. Paolozzi, L. Passamonti, D.Pierluigi, C. Pucci, A. Russo, G. Saviano, and S. Tomassini

Abstract

We report on a novel concept of silicon microstrips and straw tubes detector, where integration is accomplished by a straw module with straws not subjected to mechanical tension in a Rohacell lattice and CFRP shell.

Published
2004
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32. First Results on Hypernuclear Spectroscopy from the FINUDA Experiment at DAFNE

Author

M. Agnello, G. Beer, L. Benussi, M. Bertani, S. Bianco, E. Botta, T. Bressani, L. Busso, D. Calvo, P. Camerini, P. Cerello, B. Dalena, F. De Mori, G. D'Erasmo, D. Di Santo, F.L. Fabbri, D. Faso, A. Feliciello, A. Filippi, V. Filippini, E.M. Fiore, H. Fujioka, P. Gianotti, N. Grion, A. Krasnoperov, V. Lucherini, S. Marcello, T. Maruta, N. Mirfakhrai, O. Morra, A. Olin, E. Pace, M. Pallotta, M. Palomba, A. Pantaleo, A. Panzarasa, V. Paticchio, S. Piano, F. Pompili, R. Rui, G. Simonetti, H. So, S. Tomassini, R. Wheadon, and A. Zenoni

Abstract

FINUDA is the hypernuclear physics experiment carried out at DAΦNE, the e^+e^- , ϕ-factory of the INFN Frascati Laboratory. The aim of the experiment is to study simultaneously the formation and decay of hypernuclei produced by the strangeness exchange reaction induced by the stopped $ K^- coming from the decay of the ϕ(1020) mesons. This paper presents the first preliminary results concerning spectrometer performances, hypernuclear formation and decay from the first FINUDA data set.

Published
2004
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33. Dalitz plot analysis of D_s+ and D+ decay to pi+pi-pi+ using the K-matrix formalism

Author

J.M. Link, P.M. Yager, J.C. Anjos, I. Bediaga, C. Göbel, A.A. Machado, J. Magnin, A. Massafferri, J.M. de Miranda, I.M. Pepe, E. Polycarpo, A.C. dos Reis, S. Carrillo, E. Casimiro, E. Cuautle, A. Sánchez-Hernández, C. Uribe, F. Vázquez, L. Agostino, L. Cinquini, J.P. Cumalat, B. O'Reilly, I. Segoni, M. Wahl, J.N. Butler, H.W.K. Cheung, G. Chiodini, I. Gaines, P.H. Garbincius, L.A. Garren, E. Gottschalk, P.H. Kasper, A.E. Kreymer, R. Kutschke, M. Wang, L. Benussi, M. Bertani, S. Bianco, F.L. Fabbri, A. Zallo, M. Reyes, C. Cawlfield, D.Y. Kim, A. Rahimi, J. Wiss, R. Gardner, A. Kryemadhi, Y.S. Chung, J.S. Kang, B.R. Ko, J.W. Kwak, K.B. Lee, K. Cho, H. Park, G. Alimonti, S. Barberis, M. Boschini, A. Cerutti, P. D'Angelo, M. DiCorato, P. Dini, L. Edera, S. Erba, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Moroni, D. Pedrini, C. Pontoglio, F. Prelz, M. Rovere, S. Sala, T.F. Davenport, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, M.M. Merlo, D. Pantea, D. Lopes Pegna, S.P. Ratti, C. Riccardi, P. Vitulo, H. Hernandez, A.M. Lopez, E. Luiggi, H. Mendez, A. Paris, J.E. Ramirez, Y. Zhang, J.R. Wilson, T. Handler, R. Mitchell, D. Engh, M. Hosack, W.E. Johns, M. Nehring, P.D. Sheldon, K. Stenson, E.W. Vaandering, M. Webster, and M. Sheaff

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Scattering, Dalitz plot, FOS: Physical sciences, High Energy Physics - Experiment, Nuclear physics, Formalism (philosophy of mathematics), High Energy Physics - Experiment (hep-ex), High Energy Physics::Experiment, Spectroscopy, K matrix, Matrix formalism
Abstract

FOCUS results from Dalitz plot analysis of D_s+ and D+ to pi+pi-pi+ are presented. The K-matrix formalism is applied to charm decays for the first time to fully exploit the already existing knowledge coming from the light-meson spectroscopy experiments. In particular all the measured dynamics of the S-wave pipi scattering, characterized by broad/overlapping resonances and large non-resonant background, can be properly included. This paper studies the extent to which the K-matrix approach is able to reproduce the observed Dalitz plot and thus help us to understand the underlying dynamics. The results are discussed, along with their possible implications on the controversial nature of the sigma meson., To be submitted to Phys.Lett.B A misprint corrected in formula 3

Published
2003

34. Results on Position Monitoring and Dispacement (Omega-Like Device) by Means of Fiber Bragg Grating Sensors for the BTeV Detector

Author

L. Benussi, M. Bertani, S. Bianco, M.A. Caponero, D. Colonna, F. Di Falco, F.L. Fabbri, F. Felli, M. Giardoni, A. La Monaca, F.Massa, B. Ortenzi, M. Pallotta, A. Paolozzi, L. Passamonti, D.Pierluigi, and A. Russo

Subjects
Physics::Instrumentation and Detectors, Physics::Optics
Abstract

We propose to use Fiber Bragg Grating sensors for position monitoring of silicon tracking detectors up to a micron precision. We also introduce the concept of a device (the Omega-like device) which, instrumented with FBG sensors, is able to relocate moving structures with a 10 micron precision. We show R&D results including long term stability, resolution, radiation hardness and characterization of Fiber Bragg Grating sensors used to monitor structure deformation, repositioning, and surveying of silicon detectors in High Energy Physics.

Published
2003
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35. Charm system tests of CPT and Lorentz invariance with FOCUS

Author

J.M. Link, M. Reyes, P.M. Yager, J.C. Anjos, I. Bediaga, C. Göbel, J. Magnin, A. Massafferri, J.M. de Miranda, I.M. Pepe, A.C. dos Reis, S. Carrillo, E. Casimiro, E. Cuautle, A. Sánchez-Hernández, C. Uribe, F. Vázquez, L. Agostino, L. Cinquini, J.P. Cumalat, B. O'Reilly, J.E. Ramirez, I. Segoni, M. Wahl, J.N. Butler, H.W.K. Cheung, G. Chiodini, I. Gaines, P.H. Garbincius, L.A. Garren, E. Gottschalk, P.H. Kasper, A.E. Kreymer, R. Kutschke, L. Benussi, S. Bianco, F.L. Fabbri, A. Zallo, C. Cawlfield, D.Y. Kim, K.S. Park, A. Rahimi, J. Wiss, R. Gardner, A. Kryemadhi, K.H. Chang, Y.S. Chung, J.S. Kang, B.R. Ko, J.W. Kwak, K.B. Lee, K. Cho, H. Park, G. Alimonti, S. Barberis, M. Boschini, A. Cerutti, P. D'Angelo, M. DiCorato, P. Dini, L. Edera, S. Erba, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Moroni, D. Pedrini, C. Pontoglio, F. Prelz, M. Rovere, S. Sala, T.F. Davenport, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, M.M. Merlo, D. Pantea, D.L. Pegna, S.P. Ratti, C. Riccardi, P. Vitulo, H. Hernandez, A.M. Lopez, E. Luiggi, H. Mendez, A. Paris, J. Quinones, W. Xiong, Y. Zhang, J.R. Wilson, T. Handler, R. Mitchell, D. Engh, M. Hosack, W.E. Johns, M. Nehring, P.D. Sheldon, K. Stenson, E.W. Vaandering, M. Webster, and M. Sheaff

Subjects
Physics, Particle physics, Nuclear and High Energy Physics, Meson, Lorentz transformation, media_common.quotation_subject, FOS: Physical sciences, Lorentz covariance, Asymmetry, Standard Model, High Energy Physics - Experiment, symbols.namesake, High Energy Physics - Experiment (hep-ex), Standard-Model Extension, symbols, Charm (quantum number), media_common
Abstract

We have performed a search for CPT violation in neutral charm meson oscillations. While flavor mixing in the charm sector is predicted to be small by the Standard Model, it is still possible to investigate CPT violation through a study of the proper time dependence of a CPT asymmetry in right-sign decay rates for $D^0\to K^-\pi^+$ and $\d0b\to K^+\pi^-$. This asymmetry is related to the CPT violating complex parameter $\xi$ and the mixing parameters $x$ and $y$: $A_{CPT}\propto{\rm Re} \xi y-{\rm Im} \xi x$ . Our 95% confidence level limit is $-0.0068, Comment: 12 pages 5 figures

Published
2003

36. Light Quark Spectroscopy Results from FOCUS and E687

Author

Bianco, Stefano, J.M. Link, L. Agostino, G. Alimonti, J.C. Anjos, V. Arena, R. Baldini-Ferroli, S. Barberis, I. Bediaga, G. Bellini, L. Benussi, J.M. Bishop, G. Boca, G. Bonomi, M. Boschini, D. Brambilla, D. Buchholz, J.N. Butler, B. Caccianiga, A. Calandrino, S. Carrillo, E. Casimiro, N.M. Cason, C. Castoldi, C. Cawlfield, A. Cerutti, H.W.K. Cheung, G. Chiodini, K. Cho, Y.S. Chung, S. Cihangir, L. Cinquini, D. Claes, N. Copty, R. Culbertson, J.P. Cumalat, C. Dallapiccola, P. D'Angelo, T.F. Davenport III, J.M. De Miranda, M. DiCorato, P. Dini, A.C. Dos Reis, L. Edera, D. Engh, C.J. Kennedy, S. Erba, F.L. Fabbri, P.L. Frabetti, I. Gaines, P.H. Garbincius, R. Gardner, L.A. Garren, M. Giammarchi, G. Gianini, J.F. Ginkel, B. Gobbi, C. Göbel, E. Gottschalk, S.A. Gourlay, R. Greene, T. Handler, D.J. Harding, H. Hernandez, M. Hosack, P. Inzani, W.E. Johns, J.S. Kang, P.H. Kasper, D.Y. Kim, G.N. Kim, B.R. Ko, A.E. Kreymer, A. Kryemadhi, R. Kutschke, J.W. Kwak, Y. Kwon, P. Lebrun, K.B. Lee, F. Leveraro, G. Liguori, T.F. Lin, A.M. Lopez, J. Magnin, S. Malvezzi, A. Massafferri, D. Menasce, H. Mendez, L. Mendez, M. Merlo, E. Meroni, M. Mezzadri, L. Milazzo, A. Mirles, E. Montiel, L. Moroni, S.S. Myung, M.S. Nehring, D. Olaya, B. O'Reilly, D. Pantea, V.S. Paolone, K.S. Park, H. Park, D. Pedrini, I.M. Pepe, L. Perasso, C. Pontoglio, F. Prelz, M. Purohit, D.L. Puseljic, J. Quinones, A. Rahimi, J.E. Ramirez, S.P. Ratti, M. Reyes, C. Riccardi, C. Rivera, M. Rovere, R.C. Ruchti, S. Sala, A. Sala, M. Sales, A. Sánchez-Hernández, I. Segoni, M. Sheaff, P.D. Sheldon, W.D. Shephard, S. Shukla, F. Simõ, K. Stenson, J.A. Swiatek, P. Torre, D. Torretta, C. Uribe, E.W. Vaandering, F. Vasquez, L. Viola, M. Vittone, P. Vitulo, M.S. Webster, J.R. Wilson, J. Wiss, Z.Y. Wu, P.M. Yager, A. Zallo, and Y. Zhang

Abstract

Using the FOCUS spectrometer (experiments 687 and 831 at Fermilab) we confirm the existence of a diffractively photoproduced enhancement in K^+K^- at 1750 MeV/c^2 with nearly 100 times the statistics of previous experiments. We also observe a narrow dip structure at 1.9 GeV/c2 in a study of diffractive photoproduction of the 3π^+3π^- final state.

Published
2002
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37. Evidence for a narrouw dip structure at 1.9 GeV/ c^2 in 3pi^+3p^- Diffractive Photoproduction

Author

P.L. Frabetti, H.W.K. Cheung, J.P. Cumalat, C. Dallapiccola, J.F. Ginkel, W.E. Johns, M.S. Nehring, E.W. Vaandering, J.N. Butler, S. Cihangir, I. Gaines, P.H. Garbincius, L. Garren, S.A. Gourlay, D.J. Harding, P. Kasper, A. Kreymer, P. Lebrun, S. Shukla, M. Vittone, R. Baldini-Ferroli, S. Bianco, F.L. Fabbri, S. Sarwar, A. Zallo, C. Cawlfield, R. Culbertson, R.W. Gardner, E. Gottschalk, R. Greene, K.Park, A. Rahimi, J. Wiss, G. Alimonti, G. Bellini, M. Boschini, D. Brambilla, B. Caccianiga, L. Cinquini, M. DiCorato, P. Dini, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, E. Meroni, L. Milazzo, L. Moroni, D. Pedrini, L. Perasso, F. Prelz, A. Sala, S. Sala, D. Torretta, D. Buchholz, D. Claes, B. Gobbi, B. O’Reilly, J.M. Bishop, N.M. Cason, C.J. Kenned, G.N. Kim, T.F. Lin, D.L. Puseljic, R.C. Ruchti, W.D. Shephard, J.A. Swiatek, Z.Y. Wu, V. Arena, G. Boca, G. Bonomi, C. Castoldi, G. Gianini, M. Merlo, S.P. Ratti, C. Riccardi, L. Viola, P. Vitulo, A.M. Lopez, L. Mendez, A. Mirles, E. Montiel, D. Olaya, J.E. Ramirez, C.Rivera, Y. Zhang, J.M. Link, V.S. Paolone, P.M. Yager, J.R. Wilson, J. Cao, M. Hosack, P.D. Sheldon, F. Davenport, K. Cho, K. Danyo, T. Handler, B.G. Cheon, Y.S. Chung, J.S. Kang, K.Y. Kim, K.B. Lee, and S.S. Myung

Abstract

A narrow dip structure has been observed at 1.9 GeV/c^2 in a study of diffractive photo-production of the 3pi^+ 3 pi^- final state performed by the Fermilab experiment E687.

Published
2001
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38. New Focus Results on Charm Mixing and CP Violation

Author

S. Bianco, J.M. Link, V.S. Paolone, M. Reyes, P.M. Yager, J.C. Anjos, I. Bediaga, C. Göbel, J. Magnin, J.M. De Miranda, I.M. Pepe, A.C. Dos Reis, F. SimãO, S. Carrillo, E. Casimiro, H. Mendez, A.Sànchez-Hernàndez, C. Uribe, F. Vasquez, L. Cinquini, J.P. Cumalat, J.E. Ramirez, B. O'Reilly, E.W. Vaandering, J.N. Butler, H.W.K. Cheung, I. Gaines, P.H. Garbincius, L.A. Garren, E. Gottschalk, S.A. Gourlay, P.H. Kasper, A.E. Kreymer, R. Kutschke, F.L. Fabbri, S. Sarwar, A. Zallo, C. Cawlfield, D.Y. Kim, K.S. Park, A. Rahimi, J. Wiss, R. Gardner, Y.S. Chung, J.S. Kang, B.R. Ko, J.W. Kwak, K.B. Lee, S.S. Myung, H. Park, G. Alimonti, M. Boschini, D. Brambilla, B. Caccianiga, A. Calandrino, P. D'Angelo, M. DiCorato, P. Dini, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Milazzo, L. Moroni, D. Pedrini, F. Prelz, M. Rovere, A. Sala, S. Sala, T.F. Davenport III, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, M. Merlo, D. Pantea, S.P. Ratti, C. Riccardi, P. Torre, L. Viola, P. Vitulo, H. Hernandez, A.M. Lopez, L. Mendez, A. Mirles, E. Montiel, D. Olaya, J. Quinones, C. Rivera, Y. Zhang, N. Copty, M. Purohit, J.R. Wilson, K. Cho, T. Handler, D. Engh, W.E. Johns, M. Hosack, M.S. Nehring, M. Sales, P.D. Sheldon, K. Stenson, M.S. Webster, M. Sheaff, and Y. Kwon

Abstract

We present a summary of recent results on CP violation and mixing in the charm quark sector based on a high statistics sample collected by photoproduction experiment FOCUS (E831 at Fermilab). We have measured the difference in lifetimes for the D0 decays: D0→K−π+ and D0→K−K+. This translates into a measurement of the yCP mixing parameter in the $\d0d0$ system, under the assumptions that K−K+ is an equal mixture of CP odd and CP even eigenstates, and CP violation is negligible in the neutral charm meson system. We verified the latter assumption by searching for a CP violating asymmetry in the Cabibbo suppressed decay modes D+→K−K+π+, D0→K−K+ and D0→π−π+. We show preliminary results on a measurement of the branching ratio Γ(D∗+→π+(K+π−))/Γ(D∗+→π+(K−π+)).

Published
2000
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39. Preliminary Results on Charmed Meson Spectroscopy

Author

J.M Link, V.S. Paolone, M. Reyes, P.M. Yager, J.C. Anjos, I. Bediaga, C. Göbel, J. Magnin, J.M. De Miranda, I.M. Pepe, A.C. Dos Reis, F. Simão, S. Carrillo, E. Casimiro, H. Mendez, A.Sánchez-Hernández, C. Uribe, F. Vasquez, L. Cinquini, J.P. Cumalat, J.E. Ramirez, B. O'Reilly, E.W. Vaandering, J.N. Butler, H.W.K. Cheung, I. Gaines, P.H. Garbincius, L.A. Garren, E. Gottschalk, S.A. Gourlay, P.H. Kasper, A.E. Kreymer, R. Kutschke, S. Bianco, F.L. Fabbri, S. Sarwar, A. Zallo, C. Cawlfield, D.Y. Kim, K.S. Park, A. Rahimi, J. Wiss, R. Gardner, Y.S. Chung, J.S. Kang, B.R. Ko, J.W. Kwak, K.B. Lee, S.S. Myung, H. Park, G. Alimonti, M. Boschini, D. Brambilla, B. Caccianiga, A. Calandrino, P. D'Angelo, M. DiCorato, P. Dini, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Milazzo, L. Moroni, D. Pedrini, F. Prelz, M. Rovere, A. Sala, S. Sala, T.F. Davenport III, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, M. Merlo, D. Pantea, S.P. Ratti, C. Riccardi, P. Torre, L. Viola, P. Vitulo, H. Hernandez, A.M. Lopez, L. Mendez, A. Mirles, E. Montiel, D. Olaya, J. Quinones, C. Rivera, Y. Zhang, N. Copty, M. Purohit, J.R. Wilson, K. Cho, T. Handler, D. Engh, W.E. Johns, M. Hosack, M.S. Nehring, M. Sales, P.D. Sheldon, K. Stenson, M.S. Webster, M. Sheaff, and Y. Kwon

Subjects
High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract

We report the preliminary measurement by the FOCUS Collaboration (E831 at Fermilab) of masses and widths of the L=1 charm mesons D*^+_2 and D*^+_2 . The fit of the invariant mass distribution requires an additional term to account for a broad structure over background.

Published
2000
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40. Heavy Flavor Spectroscopy

Author

F.L. Fabbri

Subjects
High Energy Physics::Lattice, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract

I review and discuss the status of heavy-flavor spectroscopy.

Published
1999
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41. FINUDA, the physics program

Author

V. Filippini, M. Agnello, P.A. Amaudruz, G. Beer, L. Benussi, M. Bertani, S. Bianco, E. Botta, T. Bressani, L. Busso, D. Calvo, P. Camerini, L. Celano, P. Cerello, G. D'Erasmo, F.L. Fabbri, A. Feliciello, A. Filippi, E.M. Fiore, L. Fiore, P. Gianotti, M. Giardoni, D.R. Gill, N. Grion, C. Guaraldo, L. Jie, F. Iazzi, A. Lanaro, L. Lee, V. Lucherini, S. Marcello, G. Marciano, B. Minetti, N. Mirfakhrai, O. Morra, A.A. Nozdrin, A. Olin, E. Pace, A. Pantaleo, V. Paticchio, A. Raimondo, E. Rossetto, A. Rotondi, R. Ruih, P. Salvini, S. Sarwar, V. Serdyuk, G. Smith, L. Trasatti, L. Venturelli, R. Wheadon, S. Yen, A. Zenoni, A. Zia, V., Filippini, M., Agnello, P. A., Amaudruz, G., Beer, L., Benussi, M., Bertani, S., Bianco, E., Botta, T., Bressani, L., Busso, D., Calvo, Camerini, Paolo, L., Celano, P., Cerello, G., D'Erasmo, F. L., Fabbri, A., Feliciello, A., Filippi, E. M., Fiore, L., Fiore, P., Gianotti, M., Giardoni, D. R., Gill, N., Grion, C., Guaraldo, L., Jie, F., Iazzi, A., Lanaro, L., Lee, V., Lucherini, S., Marcello, G., Marciano, B., Minetti, N., Mirfakhrai, O., Morra, A. A., Nozdrin, A., Olin, E., Pace, A., Pantaleo, V., Paticchio, A., Raimondo, E., Rossetto, A., Rotondi, Rui, Rinaldo, P., Salvini, S., Sarwar, V., Serdyuk, G., Smith, L., Trasatti, L., Venturelli, R., Wheadon, S., Yen, A., Zenoni, and A., Zia

Subjects
Nuclear physics, Physics, Nuclear reaction, Nuclear and High Energy Physics, Pion, Meson, Hadron, Monte Carlo method, Elementary particle, kaons, Particle detector, Background radiation
Published
1998

42. The DAFNE F???FACTORY at FRASCATI: Collider Project and Physics Program

Author

F.L. Fabbri

Subjects
Nuclear Theory, Physics::Accelerator Physics, High Energy Physics::Experiment, Physics::Atomic Physics, Nuclear Experiment
Abstract

The DAFNE ϕ-Factory expected to be operational at the Frascati Laboratory will offer a unique opportunity to clarify many questions on kaon physics remained open for more than 30 years: CP and CPT nonconservation, hypernucleus production and decays, kaonic hydrogen puzzle, kaon rare decays, kaon nucleon scattering length, and others.

Published
1996
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43. Measurements of Light Yield, Attenuation Lenght and Time Response of Long Samples of 'Blue' Scintillating Fibers

Author

A. Antonelli, M. Antonelli, G. Barbiellini, M. Barone, S. Bertolucci, S. Bianco, C. Bini, C. Bloise, V. Bolognesi, F. Bossi, R. Caloi, P. Campana, F. Cervelli, M. Cordelli, G. De Zorzi, G. Di Cosimo, A. Di Domenico, O. Erriquez, F.L. Fabbri, A. Farilla, A. Ferrari, P. Franzini, F. Garufi, P. Gauzzi, E. Gero, S. Giovannella, R. Haydar, M. Incagli, L. Keeble, W. Kim, G. Lanfranchi, J. Lee-Franzini, A. Martini, A. Martinis, S. Miscetti, F. Murtas, A. Parri, A. Passeri, S. Sarwar, F. Scuri, E. Spiriti, L. Tortora, G. Venanzoni, and X. L. Wang. S. WöLfle

Subjects
Physics::Instrumentation and Detectors, Physics::Accelerator Physics, High Energy Physics::Experiment
Abstract

In connection with the design of the electromagnetic calorimeter of the KLOE detector, we have studied the performance of several samples of commercially available plastic scintillating fibers with a particle beam at the CERN PS. Results on light yield, attenuation length and time resolution measurements concerning 2-4.5m long samples of those fibers are presented.

Published
1996
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45. First results of a search for neutrinos from collapsing stars with the LVD at Gran Sasso

Author

M. Aglietta, B. Alpat, E.D. Aleya, P. Antonioli, G. Anzivino, G. Badino, Y. Ban, G. Bari, M. Basile, A. Benelli, V.S. Berezinsky, L. Bergamasco, S. Bianco, A. Bizzetti, G. Bruni, Y. Cao, G. Cara Romeo, R. Casaccia, C. Castagnoli, A. Castellina, K. Chen, R. Chen, J.A. Chinellato, L. Cifarelli, G. Cini, S. Cong, A. Contin, V.L. Dadikin, M. Dardo, A. De Silva, M. Deutsch, L.G. Dos Santos, R.I. Enikeev, F.L. Fabbri, W. Fulgione, P. Galeotti, P. Ghia, P. Giusti, F. Grianti, S. Gu, E.S. Hafen, P. Haridas, G. Iacobucci, N. Inoue, F.F. Khalchukov, E.V. Korolkova, P.V. Kortchaguin, V.B. Kortchaguin, V.A. Kudryavtsev, G. Landi, K. Lau, X. Lin, L. Lu, J. Ma, Z. Ma, G. Maccarone, A.S. Malguin, Z. Mao, M.A. Markov, T. Massam, B. Mayes, N. Mengotti Silva, A. Misaki, G.H. Mo, B. Monteleoni, C. Morello, J. Moromisato, R. Nania, G. Navarra, L. Panaro, D. Parks, P.G. Pelfer, L. Periale, P. Picchi, P. Pinna, L. Pinsky, I.A. Pless, M. Pu, J. Pyrlyk, J. Qiu, V.G. Ryasny, O.G. Ryazhskaya, O. Saavedra, K. Saitoh, D. Sanders, G. Sartorelli, S. Sarwar, D. Shen, G. Susinno, V.P. Talochkin, H. Tang, J. Tang, W. Tian, G.C. Trinchero, A. Turtelli, I. Uman, P. Vallania, S. Vernetto, E. von Goeler, L. Votano, T. Wada, F. Wang, H. Wang, S. Wang, R. Weathers, R. Weinstein, M. Widgoff, L. Xu, Z. Xu, V.F. Yakushev, I. Yamamoto, G. Yi, A. Zallo, G.T. Zatsepin, X. Zhou, X. Zhu, B. Zhuan, and A. Zichichi

Subjects
ICARUS, Physics, Nuclear and High Energy Physics, COSMIC cancer database, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, Other Fields of Physics, Astronomy, Astrophysics, Scintillator, Atomic and Molecular Physics, and Optics, Galaxy, Stars, High Energy Physics::Experiment, Neutrino, Large Volume Detector
Abstract

The Large Volume Detector (LVD) in the Gran Sasso underground Laboratory is a multipurpose detector consisting of a large volume of liquid scintillator interleaved with limited streamer tubes. In this paper we discuss its power to study low energy cosmic neutrinos. The results show that the first LVD tower (368 tons of liquid scintillator) is well suited to detect neutrinos from gravitational stellar collapses within all of our Galaxy over a wide range of burst duration (up to a few hundred seconds). No burst candidates have been observed in the first two months of data taking.

Published
1993

46. A new low-walk double-threshold discriminator

Author

A. Balla, V. Russo, M. Bertani, G. Corradi, F. Pompili, L. Passamonti, E. Pace, V. Lucherini, P. Gianotti, F.L. Fabbri, Stefano Bianco, S. Sarwar, and L. Benussi

Subjects
Physics, Nuclear and High Energy Physics, Discriminator, business.industry, Interface (computing), Double threshold, Electrical engineering, business, Instrumentation, VMEbus, Channel density
Abstract

A new double-threshold discriminator has been designed and constructed at Frascati INFN laboratories for processing the signals arising from gas-drift chambers. Its main features are low time walk, high channel density and VME interface. The discriminator board is 9U sized and houses 32 channels mounted on independent sockets. This solution eases the replacement of faulty channels without loosing operation of the full board.

Published
2001
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47. The FINUDA straw tube detector

Author

A. Zia, L. Benussi, M. Bertani, S. Bianco, F.L. Fabbri, P. Gianotti, M. Giardoni, V. Lucherini, A. Mecozzi, E. Pace, L. Passamonti, N. Qaiser, V. Russo, S. Tomassini, S. Sarwar, and V. Serdyouk

Subjects
Straw tube, Physics, Nuclear physics, Nuclear and High Energy Physics, Nuclear engineering, Detector, Measuring instrument, Straw, Instrumentation, Particle detector
Abstract

The long straw tube detectors used as the most external tracker in the FINUDA experiment are described. The test on prototypes, the performances, the final selected configuration and the update on the construction of the straw tubes actually in progress at Frascati are reviewed and summarized.

Published
2001
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48. HIGH RESOLUTION, LOW-ENERGY E.M. Pb-SCIFI CALORIMETRY. AN INVESTIGATION ON FIBRES AND TESTS ON PHOTON BEAM WITH LOW-ENERGY PHOTONS

Author

S. BIANCO, R. CASACCIA, L. DANIELLO, F.L. FABBRI, M. GIARDONI, D. HERTZOG, S. HUGHES, M. LINDOZZI, L. PASSAMONTI, P. REIMER, V. RUSSO, S. SARWAR, R. TAYLOE, L. VOTANO, and A. ZALLO

Abstract

This article reports on studies aimed to characterise the properties of plastic scintillating fibres to be used in head-on, 1:1 Pb-SCIFI calorimetric modules. The effect of glue on the attenuation of the light transported by cladding close to the photomultiplier tube is studied and found to effectively decrease the contribution of cladding light. Pb-SCIFI modules have been assembled and tested on a 20-80 MeV tagged photon beam. Good linearity and energy resolution better than 6%/ \\sqrt{E[GeV]} were achieved, therefore showing that this technique is suitable for experimentation at \ϕ-factories.

Published
1991
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49. ELECTROMAGNETIC CALORIMETERS FOR DAFNE THAT MAKE USE OF CsI(TI) AND Pb + FIBER ELEMENTS

Author

S. BIANCO, R. CASACCIA, F.L. FABBRI, M. GIARDONI, L. PASSAMONTI, M. LINDOZZI, N. I. QAZI, V. RUSSO, S. SARWAR, L. VOTANO, and A. ZALLO

Subjects
Physics::Instrumentation and Detectors, High Energy Physics::Experiment
Abstract

In this paper the physical performances of a calorimeter composed of a highly segmented tracking section (5X_0) that uses CsI(TI) elements, followed by a total absorption 10X_0 Pb-scintillating fiber segment, are compaired with those of a more conventional Pb-scintillating fiber detector. The γ energy range covered by these detectors is (20 - 300)MeV, as requested by the experimentation at e^+e^- ϕ factory machines.

Published
1991
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