4 results on '"M. Bongi"'
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2. Measurement of very forward neutron energy spectra for 7 TeV proton–proton collisions at the Large Hadron Collider
- Author
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O. Adriani, E. Berti, L. Bonechi, M. Bongi, G. Castellini, R. D'Alessandro, M. Del Prete, M. Haguenauer, Y. Itow, K. Kasahara, K. Kawade, Y. Makino, K. Masuda, E. Matsubayashi, H. Menjo, G. Mitsuka, Y. Muraki, Y. Okuno, P. Papini, A.-L. Perrot, S. Ricciarini, T. Sako, N. Sakurai, Y. Sugiura, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W.C. Turner, and Q.D. Zhou
- Subjects
LHC ,Forward neutron production ,Hadronic-interaction model ,Physics ,QC1-999 - Abstract
The Large Hadron Collider forward (LHCf) experiment is designed to use the LHC to verify the hadronic-interaction models used in cosmic-ray physics. Forward baryon production is one of the crucial points to understand the development of cosmic-ray showers. We report the neutron-energy spectra for LHC s=7 TeV proton–proton collisions with the pseudo-rapidity η ranging from 8.81 to 8.99, from 8.99 to 9.22, and from 10.76 to infinity. The measured energy spectra obtained from the two independent calorimeters of Arm1 and Arm2 show the same characteristic feature before unfolding the detector responses. We unfolded the measured spectra by using the multidimensional unfolding method based on Bayesian theory, and the unfolded spectra were compared with current hadronic-interaction models. The QGSJET II-03 model predicts a high neutron production rate at the highest pseudo-rapidity range similar to our results, and the DPMJET 3.04 model describes our results well at the lower pseudo-rapidity ranges. However, no model perfectly explains the experimental results over the entire pseudo-rapidity range. The experimental data indicate a more abundant neutron production rate relative to the photon production than any model predictions studied here.
- Published
- 2015
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3. Calocube - A highly segmented calorimeter for a space based experiment
- Author
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S. Bottai, N. Daddi, S. B. Ricciarini, P. Spillantini, P. Papini, E. Vannuccini, Maria Miritello, A. Gregorio, G.F. Rappazzo, Marina Trimarchi, Alessia Tricomi, L. Pacini, G. Pauletta, O. Starodubtsev, R. D' Alessandro, G. Carotenuto, Anna Vedda, A. Tiberio, O. Adriani, M. Chiari, P. W. Cattaneo, A. Basti, A. Rappoldi, V. Bonvicini, N. Zampa, M. Bongi, Paolo Brogi, Antoniangelo Agnesi, Sebastiano Albergo, G. Castellini, S. Detti, L. Santi, Lucrezia Auditore, Lorenzo Bonechi, P. S. Marrocchesi, Mauro Fasoli, A. Sulaj, N. Finetti, Paolo Maestro, Antonio Trifiro, Federico Pirzio, J. E. Suh, B. Zerbo, S. Bonechi, G. Zampa, D. Cauz, Gabriele Bigongiari, Eugenio Berti, Piergiulio Lenzi, Nicola Mori, Maria Giuseppina Bisogni, Marco Grassi, Marco Incagli, Riccardo Paoletti and Giovanni Signorelli, D'Alessandro, R., Adriani, O., Agnesi, A., Albergo, S., Auditore, L., Basti, A., Berti, E., Bigongiari, G., Bonechi, L., Bonechi, S., Bongi, M., Bonvicini, V., Bottai, S., Brogi, P., Carotenuto, G., Castellini, G., Cattaneo, P. W., Cauz, D., Chiari, M., Daddi, N., Detti, S., Fasoli, M., Finetti, N., Gregorio, Anna, Lenzi, P., Maestro, P., Marrocchesi, P. S., Miritello, M., Mori, N., Pacini, L., Papini, P., Pauletta, G., Pirzio, F., Rappazzo, G. F., Rappoldi, A., Ricciarini, S., Santi, L. G., Spillantini, P., Starodubtsev, O., Suh, J. E., Sulaj, A., Tiberio, A., Tricomi, A., Trifiro, A., Trimarchi, M., Vannuccini, E., Vedda, A., Zampa, Gianluigi, Zampa, Nicola, Zerbo, B., D'Alessandro, R, Adriani, O, Agnesi, A, Albergo, S, Auditore, L, Basti, A, Berti, E, Bigongiari, G, Bonechi, L, Bonechi, S, Bongi, M, Bonvicini, V, Bottai, S, Brogi, P, Carotenuto, G, Castellini, G, Cattaneo, P, Cauz, D, Chiari, M, Daddi, N, Detti, S, Fasoli, M, Finetti, N, Gregorio, A, Lenzi, P, Maestro, P, Marrocchesi, P, Miritello, M, Mori, N, Pacini, L, Papini, P, Pauletta, G, Pirzio, F, Rappazzo, G, Rappoldi, A, Ricciarini, S, Santi, L, Spillantini, P, Starodubtsev, O, Suh, J, Sulaj, A, Tiberio, A, Tricomi, A, Trifiro, A, Trimarchi, M, Vannuccini, E, Vedda, A, Zampa, G, Zampa, N, and Zerbo, B
- Subjects
Physics ,Calorimeter ,Nuclear and High Energy Physics ,Astroparticle ,Crystals ,Instrumentation ,Calorimeter (particle physics) ,010308 nuclear & particles physics ,Detector ,Cosmic ray ,Space (mathematics) ,01 natural sciences ,Particle identification ,Nuclear physics ,Acceleration ,0103 physical sciences ,Crystal ,010306 general physics ,Energy (signal processing) - Abstract
Future research in High Energy Cosmic Ray Physics concerns fundamental questions on their origin, acceleration mechanism, and composition. Unambiguous measurements of the energy spectra and of the composition of cosmic rays at the “knee” region could provide some of the answers to the above questions. Only ground based observations, which rely on sophisticated models describing high energy interactions in the earth׳s atmosphere, have been possible so far due to the extremely low particle rates at these energies. A calorimeter based space experiment can provide not only flux measurements but also energy spectra and particle identification, especially when coupled to a dE/dx measuring detector, and thus overcome some of the limitations plaguing ground based experiments. For this to be possible very large acceptances are needed if enough statistic is to be collected in a reasonable time. This contrasts with the lightness and compactness requirements for space based experiments. A novel idea in calorimetry is discussed here which addresses these issues while limiting the mass and volume of the detector. In fact a small prototype is currently being built and tested with ions. In this paper the results obtained will be presented in light of the simulations performed.
- Published
- 2016
4. Anisotropy studies in the cosmic ray proton flux with the PAMELA experiment
- Author
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S. V. Borisov, P. Spillantini, S. V. Koldashov, Roberta Sparvoli, V. G. Zverev, M. P. De Pascale, Mark Pearce, S. B. Ricciarini, V. V. Mikhailov, A. Bianco, Riccardo Munini, L. A. Grishantseva, Per Carlson, S. Y. Krutkov, Mirko Boezio, M. Bongi, V. Di Felice, S. A. Voronov, P. Papini, E. Vannuccini, Lorenzo Bonechi, D. Campana, V. Malvezzi, E. Mocchiutti, Valerio Formato, Giovanna Jerse, C. De Santis, M. Simon, F. Cafagna, A. A. Leonov, P. Picozza, Marco Casolino, Alfonso Monaco, S. Bottai, L. Marcelli, V. V. Malakhov, V. Bonvicini, E. A. Bogomolov, Y. I. Stozhkov, R. Carbone, A. Bruno, F. Palma, C. Pizzolotto, N. De Simone, Laura Rossetto, Maria Teresa Ricci, A. M. Galper, G. C. Barbarino, N. N. Nikonov, O. Adriani, Ritabrata Sarkar, Ugo Giaccari, G. Zampa, W. Menn, N. Zampa, G. A. Bazilevskaya, Andrea Vacchi, G. Castellini, M. D. Kheymits, Nicola Mori, G. I. Vasilyev, Y. T. Yurkin, Roberto Bellotti, A. N. Kvashnin, A. V. Karelin, G. Osteria, A. G. Mayorov, Matteo Martucci, Juan Wu, U., Giaccari, O., Adriani, Barbarino, Giancarlo, G. A., Bazilevskaya, R., Bellotti, A., Bianco, M., Boezio, E. A., Bogomolov, L., Bonechi, M., Bongi, V., Bonvicini, S., Borisov, S., Bottai, A., Bruno, F., Cafagna, D., Campana, R., Carbone, P., Carlson, M., Casolino, G., Castellini, M. P., De Pascale, C., De Santi, N., De Simone, V., Di Felice, V., Formato, A. M., Galper, L., Grishantseva, G., Jerse, A. V., Karelin, M. D., Kheymit, S. V., Koldashov, S. Y., Krutkov, A. N., Kvashnin, A., Leonov, V., Malakhov, V., Malvezzi, L., Marcelli, M., Martucci, A. G., Mayorov, W., Menn, V. V., Mikhailov, E., Mocchiutti, A., Monaco, N., Mori, R., Munini, N., Nikonov, Osteria, Giuseppe, F., Palma, P., Papini, M., Pearce, P., Picozza, C., Pizzolotto, M., Ricci, S. B., Ricciarini, L., Rossetto, R., Sarkar, M., Simon, R., Sparvoli, P., Spillantini, Y. I., Stozhkov, A., Vacchi, E., Vannuccini, G., Vasilyev, S. A., Voronov, J., Wu, Y. T., Yurkin, G., Zampa, N., Zampa, V. G., Zverev, Ivan De Mitri, Nicola Giglietto, Giovanni Marsella, Antonio Surdo, G. C., Barbarino, Formato, Valerio, Jerse, Giovanna, Mocchiutti, Emiliano, Munini, Riccardo, G., Osteria, and Vacchi, Andrea
- Subjects
Physics ,Nuclear and High Energy Physics ,Rigidity (electromagnetism) ,Proton ,Astrophysics::High Energy Astrophysical Phenomena ,Isotropy ,Cosmic ray ,Astrophysics ,Proton flux ,Anisotropy ,Atomic and Molecular Physics, and Optics ,Cosmic Rays - Abstract
Using data taken by the Pamela experiment during 5 years of operation we studied the anisotropy in the arrival direction distribution of cosmic ray protons with rigidity above 40 GV. In this survey we used two different and independent techniques to investigate the large and medium anisotropy patterns in the proton spectrum. With both methods the observed distribution of arrival directions is consistent with the isotropic expectation and no significant evidence of strong anisotropies has been observed.
- Published
- 2013
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