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1. The fabrication and assembly of the beam source for the SPIDER experiment

Author: P. Zaccaria, G. Corniani, M. Pavei, A. Ceracchi, C. Annino, J.F. Moreno, D. Faso, F. Geli, J. Graceffa, A. Masiello, J.M. Grenier, D. Rizzetto, V. Forest, Christophe Lievin, B. Szcepaniak, M. Busch, and Diego Marcuzzi
Subjects: Engineering, Spider, Fabrication, Test facility, business.industry, Mechanical Engineering, Nuclear engineering, Beam source, Injector, Neutral beam, Negative ions, Ion source, law.invention, Nuclear Energy and Engineering, Neutral beam injector, law, General Materials Science, business, Beam (structure), Civil and Structural Engineering
Abstract: The ITER Heating Neutral Beam injector (HNB) will be equipped with a beam source that will provide a negative beam of 40A (H or D). The R&D activities undertaken in Europe to pursue this challenging goal comprise three experiments: -ELISE – the half size ion source experiment operating in IPP Garching -SPIDER – the full size ion source experiment at Neutral Beam Test Facility (NBTF) site in Padua -MITICA - the full size full energy ITER injector prototype being also established at the NBTF The procurement of the beam source for SPIDER started in October 2012, when a contract between Fusion for Energy and Thales, Microwave & Imaging Sub-Systems (as group leader of a Consortium created with CECOM Srl, Galvano-T GmbH and Zanon SpA) was signed. The scope of the contract has been completed in October 2017 with the delivery of the SPIDER beam source at the NBTF site in Padova Italy. A review of the fabrication of the main parts and of the aspects of their assembly is reported in the paper, with a focus on some of the major issue encountered and the achievement of tight alignment tolerances of the accelerator.
Published: 2019

2. Measurement of the strong interaction induced shift and width of the 1s state of kaonic deuterium at J-PARC

Author: Toshihiko Hiraiwa, G. Beer, H. Tatsuno, Paul Buehler, Haruhiko Outa, Ken Suzuki, Alessandro Scordo, E. Sbardella, O. Vazquez Doce, Kristian Piscicchia, P. Levi Sandri, Massimiliano Bazzi, M. Cargnelli, Johann Zmeskal, Kenta Itahashi, M. Iliescu, I. Tucakovic, Robin Golser, J. Marton, A. d'Uffizi, Y. Sada, Hiroyuki Noumi, Ryugo S. Hayano, M. Poli Lener, M. Iwai, Fuminori Sakuma, M. Sato, T. Ishiwatari, K. Inoue, Hiroaki Ohnishi, Michiko Sekimoto, Makoto Tokuda, S. Ishimoto, Johannes Lachner, Hiroyuki Fujioka, Kyo Tsukada, O. Morra, D. L. Sirghi, F. Ghio, Damir Bosnar, Akihisa Toyoda, Alberto Clozza, Tomofumi Nagae, A. Romero Vidal, Hyoungchan Bhang, Yue Ma, Qi Zhang, L. Busso, Toshimitsu Yamazaki, C. Guaraldo, C. Berucci, T. Yamaga, Florin Sirghi, Shoji Suzuki, Shun Enomoto, D. Faso, Eberhard Widmann, Masahiko Iwasaki, Atsushi Sakaguchi, M. Bragadireanu, Michał Silarski, Yutaka Mizoi, Yasuyuki Matsuda, L. Fabbietti, S. Kawasaki, D. Pietreanu, S. Choi, Shinji Okada, Catalina Curceanu, Paweł Moskal, Hexi Shi, Takatoshi Suzuki, Carlo Fiorini, S. Ajimura, Masami Iio, Kiyoshi Tanida, and T. Hashimoto
Subjects: Physics - Instrumentation and Detectors, Kaonic hydrogen, Strong interaction, Nuclear Theory, FOS: Physical sciences, antikaon–nucleon interaction, low-energy QCD, General Physics and Astronomy, Context (language use), chiral symmetry breaking, kaonic deuterium, Physics and Astronomy (all), sezele, Nuclear physics, Physics and Astronomy (all), Atom, Physics::Atomic Physics, Nuclear Experiment (nucl-ex), Nuclear Experiment, Physics, Quantum chromodynamics, sezele, Instrumentation and Detectors (physics.ins-det), NATURAL SCIENCES. Physics, 3. Good health, PRIRODNE ZNANOSTI. Fizika, Deuterium, Isospin, Chiral symmetry breaking
Abstract: The antikaon-nucleon interaction close to threshold provides crucial information on the interplay between spontaneous and explicit chiral symmetry breaking in low-energy QCD. In this context the importance of kaonic deuterium X-ray spectroscopy has been well recognized, but no experimental results have yet been obtained due to the difficulty of the measurement. We propose to measure the shift and width of the kaonic deuterium 1s state with an accuracy of 60 eV and 140 eV respectively at J-PARC. These results together with the kaonic hydrogen data (KpX at KEK, DEAR and SIDDHARTA at DAFNE) will then permit the determination of values of both the isospin I=0 and I=1 antikaon-nucleon scattering lengths and will provide the most stringent constraints on the antikaon-nucleon interaction, promising a breakthrough. Refined Monte Carlo studies were performed, including the investigation of background suppression factors for the described setup. These studies have demonstrated the feasibility of determining the shift and width of the kaonic deuterium atom 1s state with the desired accuracy of 60 eV and 140 eV., 12 pages, 9 figures
Published: 2015

3. Spectroscopic Study of Hyperon Resonace Below $\bar{K}$N Threshold via the d(K−, n) Reaction

Author: C. Guaraldo, Johann Marton, M. Sekimoto, O. Morra, Shun Enomoto, M. Poli Lener, Ryugo S. Hayano, J. Zmeskal, Michael Cargnelli, A. Scorde, Haruhiko Outa, B. K. Wuenschek, P. Kienle, Makoto Tokuda, Mario Bragadireanu, K. Inoue, Florin Sirghi, Shinji Okada, M. Iwasaki, Aya Sakaguchi, Akihiro Toyoda, T. Hashimoto, H. Yim, Hiroyuki Noumi, Hiroaki Ohnishi, T. Yamazaki, Paul Buehler, K. Piscicchia, M. Iliescu, S. Ishimoto, H. Kou, Y. Kato, Y. Mizoi, Toshihiko Hiraiwa, Catalina Curceanu, E. Widmann, O. Vazquez Doce, Yasuhiro H. Matsuda, D. Faso, Tomokazu Fukuda, Y. Sada, Y. Fujiwara, K. Tanida, K. Shirotori, S. Ajimura, Masami Iio, Ken Suzuki, D. Tomono, K. Itahashi, Tomofumi Nagae, H. C. Bhang, G. A. Beer, Yue Ma, Fuminori Sakuma, L. Busso, Y. Ishiguro, S. Y. Suzuki, Q. Zhang, T. Suzuki, Hexi Shi, M. Iwai, Masatoshi Sato, T. Ishiwatari, H. Tatsuno, S. Choi, T. Yamaga, T. Ishikawa, Diana Sirghi, A. Romero Vidal, K. Tsukada, S. Kawasaki, and H. Fujioka
Subjects: Physics, 010308 nuclear & particles physics, 0103 physical sciences, Hyperon, Analytical chemistry, 010306 general physics, 01 natural sciences, Bar (unit)
Published: 2017

4. Spectroscopic Experiment of Λ(1405) via the In-flight d(K−, n) Reaction at J-PARC K1.8BR

Author: H. C. Bhang, C. Guaraldo, M. Iliescu, M. Sekimoto, Tomokazu Fukuda, T. Hashimoto, S. Ishimoto, Florin Sirghi, E. Widmann, H. Tatsuno, M. Iwasaki, S. Ajimura, T. Suzuki, Masami Iio, S. Choi, T. Yamaga, K. Tanida, Ken Suzuki, Shinji Okada, S. Kawasaki, Makoto Tokuda, Atsushi Sakaguchi, Yue Ma, H. Fujioka, Michael Cargnelli, H. Kou, T. Yamazaki, Mario Bragadireanu, G. A. Beer, Paul Buehler, H. Yim, Tomofumi Nagae, Yuuki Fujiwara, M. Tomono, Haruhiko Outa, Hexi Shi, K. Inoue, Masatoshi Sato, K. Tsukada, Hiroyuki Noumi, S. Y. Suzuki, Akihiro Toyoda, D. Faso, K. Itahashi, D. Pietreanu, L. Busso, T. Ishikawa, Catalina Curceanu, Johann Zmeskal, Y. Sada, K. Shirotori, P. Kienlep, H. Mizoi, Johann Marton, Diana Sirghi, Fuminori Sakuma, Hiroaki Ohnishi, M. Iwai, Q. Zhang, Yasuhiro H. Matsuda, Ryugo S. Hayano, Toshihiko Hiraiwa, K. Yoshida, Shun Enomoto, and O. Morra
Subjects: Physics, Analytical chemistry, J-PARC
Published: 2017

5. Search for deeply bound Kaonic nuclear states via3He(K-, n) reaction at J-PARC

Author: D. Tomono, H. Tatsuno, S. Ishimoto, Akihiro Toyoda, Makoto Tokuda, Alessandro Scordo, M. Iwasaki, Yue Ma, K. Itahashi, Shinji Okada, L. Busso, Florin Sirghi, Hiroaki Ohnishi, K. Tsukada, T. Yamazaki, Haruhiko Outa, Michael Cargnelli, K. Inoue, T. Hashimoto, Mario Bragadireanu, Tomofumi Nagae, Hiroyuki Noumi, Paul Buehler, M. Iliescu, H. Kou, Y. Kato, C. Guaraldo, S. Y. Suzuki, P. Kienle, T. Ishiwatari, Diana Sirghi, G. A. Beer, M. Sekimoto, Y. Sada, O. Vazquez Doce, Y. Ishiguro, Fuminori Sakuma, E. Widmann, O. Morra, Catalina Curceanu, Johann Marton, T. Ishikawa, M. Iwai, Johann Zmeskal, Ken Suzuki, S. Ajimura, Masami Iio, M. Poli Lener, T. Suzuki, Aya Sakaguchi, H. Yim, S. Kawasaki, Tomokazu Fukuda, Y. Mizoi, Hiroyuki Fujioka, Y. Fujiwara, A. Romero Vidal, B. K. Wuenschek, K. Tanida, H. C. Bhang, S. Choi, Shun Enomoto, T. Yamaga, Hexi Shi, Masatoshi Sato, K. Piscicchia, Q. Zhang, Yasuhiro H. Matsuda, D. Faso, Toshihiko Hiraiwa, and Ryugo S. Hayano
Subjects: Nuclear physics, Physics, Bound state, J-PARC
Published: 2014

6. A search for deeply-bound kaonic nuclear states by in-flight 3He(K-, N) reaction at J-PARC

Author: Hiroaki Ohnishi, Catalina Curceanu, Diana Sirghi, Michael Cargnelli, J. Zmeskal, T. Ishiwatari, Makoto Tokuda, Toshihiko Hiraiwa, Hexi Shi, Tomofumi Nagae, K. Piscicchia, O. Morra, Masatoshi Sato, Mario Bragadireanu, S. Kawasaki, K. Tsukada, D. Faso, Fuminori Sakuma, M. Poli Lener, H. Tatsuno, T. Hashimoto, Paul Buehler, Ryugo S. Hayano, L. Busso, T. Yamaga, Kiyoshi Tanida, Y. Kato, O. Vazquez Doce, Akihiro Toyoda, S. Choi, Kenta Itahashi, Paul Kienle, C. Guaraldo, Q. Zhang, Alessandro Scordo, H. Yim, M. Iliescu, Y. Sada, A. Romero Vidal, Shun Enomoto, M. Sekimoto, Yasuyuki Matsuda, Ken Suzuki, Johann Marton, B. K. Wuenschek, T. Ishikawa, Eberhard Widmann, S. Ishimoto, G. A. Beer, Masahiko Iwasaki, Hiroyuki Fujioka, Florin Sirghi, S. Ajimura, Masami Iio, Tomokazu Fukuda, Y. Fujiwara, Hyoungchan Bhang, H. Kou, Haruhiko Outa, Atsushi Sakaguchi, Yutaka Mizoi, K. Inoue, Hiroyuki Noumi, M. Iwai, D. Tomono, Shinji Okada, Yue Ma, T. Yamazaki, Y. Ishiguro, T. Suzuki, and S. Y. Suzuki
Subjects: Nuclear physics, Physics, General Physics and Astronomy, J-PARC
Published: 2014

7. First hypernuclear results from the FINUDA experiment at DAΦNE

Author: F. De Mori, Paolo Camerini, E. Pace, M. Bertani, F. L. Fabbri, V. Filippini, D. Calvo, H. So, G. D'Erasmo, G. Simonetti, O. Morra, A. Olin, Luigi Benussi, P. Cerello, F. Pompili, D. Di Santo, V. Lucherini, G. A. Beer, Sandro Tomassini, A. Panzarasa, Michelangelo Agnello, Stefano Bianco, L. Busso, T. Maruta, Hiroyuki Fujioka, M. Pallotta, P. Gianotti, A. Filippi, E. M. Fiore, Richard Wheadon, V. Paticchio, B. Dalena, A. Feliciello, D. Faso, Rinaldo Rui, S. Marcello, N. Grion, S. Piano, A. Pantaleo, Elena Botta, Tullio Bressani, N. Mirfakhrai, Aldo Zenoni, M. Palomba, A. Krasnoperov, M., Bertani, M., Agnello, G., Beer, L., Benussi, 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, Particle physics, Spectrometer, Meson, Astronomy and Astrophysics, Strangeness, Hypernucleus, Spectroscopy, Atomic and Molecular Physics, and Optics
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: 2005

8. Study of Neutron-Rich Hypernuclei by the (π −, K +) Reaction at J-PARC

Author: K. Matsuda, Hiroyuki Sako, S. Nagamiya, R. Kiuchi, Yutaka Mizoi, T. Soyama, Koji Miwa, C. Samanta, Kazuki Yoshida, Tomokazu Fukuda, Tadamitsu Kishimoto, Shuhei Hayakawa, Atsushi Sakaguchi, S. Ajimura, Tomohiko Takahashi, H. C. Bhang, Hiroyuki Noumi, Ryosuke Ota, O. Morra, Pranab Saha, M. Endo, Kenichi Imai, D. Faso, Kotaro Shirotori, Yuji Shimizu, T. Takahashi, L. Busso, Susumu Sato, K. Matsuoka, Ryotaro Honda, Hitoshi Sugimura, Toshihisa Tanaka, Manami Nakagawa, Yudai Ichikawa, N. Ishibashi, and Shoichi Hasegawa
Subjects: Physics, High rate, Particle physics, Silicon, Detector, chemistry.chemical_element, Lambda, Atomic and Molecular Physics, and Optics, Nuclear physics, chemistry, Neutron, J-PARC, Intensity (heat transfer), Beam (structure)
Abstract: We are planning to perform an experiment at J-PARC and produce new neutron-rich Λ hypernuclei by using the (π −, K +) reaction (J-PARC E10). As the first step, we are planning to produce $${^6_{\Lambda}{\rm H}}$$ hypernuclei with a 6Li target. To conduct this experiment, we are developing new detectors, those are scintillating fiber tracker, and silicon strip detector, for high rate operation to aim at increasing beam intensity up to 107/spill. As a result of beam test in Jun 2012, we are going to use high-rate beam at least 107/spill.
Published: 2013

9. A search for deeply-bound kaonic nuclear state at the J-PARC E15 experiment

Author: A. Romero Vidal, Yasuyuki Matsuda, Hexi Shi, Yutaka Mizoi, Masatoshi Sato, Johann Marton, Y. Sada, C. Guaraldo, G. A. Beer, Alessandro Scordo, T. Hashimoto, K. Inoue, Catalina Curceanu, S. Kawasaki, Shinji Okada, Florin Sirghi, Shun Enomoto, Paul Buehler, Hiroaki Ohnishi, L. Busso, Paul Kienle, Hiroyuki Fujioka, Haruhiko Outa, S. Choi, Tomokazu Fukuda, Mario Bragadireanu, H. Tatsuno, T. Yamazaki, Akihiro Toyoda, D. Faso, O. Vazquez Doce, Eberhard Widmann, Michiko Sekimoto, Tomofumi Nagae, Hyoungchan Bhang, Masahiko Iwasaki, K. Piscicchia, Fuminori Sakuma, O. Morra, S. Ishimoto, D. Tomono, Makoto Tokuda, M. Poli Lener, Hiroyuki Noumi, T. Ishikawa, Johann Zmeskal, Y. Ishiguro, S. Ajimura, Masami Iio, T. Ishiwatari, Atsushi Sakaguchi, Diana Sirghi, Yue Ma, H. Kou, T. Suzuki, Ken Suzuki, M. Iwai, H. Yim, S. Y. Suzuki, Yuuki Fujiwara, M. Iliescu, Kyo Tsukada, Toshihiko Hiraiwa, Ryugo S. Hayano, Michael Cargnelli, and K. Itahashi
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Proton, Nuclear state, Bound state, Neutron, Invariant mass, J-PARC
Abstract: The J-PARC E15 experiment will be performed to search for the simplest kaonic nuclear bound state, K ¯ N N , by the in-flight He 3 ( K − , N ) reaction. The exclusive measurement will be performed by a simultaneous measurement of the missing mass using the forward neutron or proton, and the invariant mass via the expected decay, e.g. K − p p → Λ p → p π − p . In this report, an overview of the experiment and an analysis of engineering runs performed in February and June are presented.
Published: 2013

10. Study of the elementary (K-, n) reactions to search for the K NN bound state via the3He (K-, n) reaction at J-PARC

Author: A. Romero Vidal, S. Kawasaki, H. Fujioka, H. Kou, K. Itahashi, Koki Kanno, Fuminori Sakuma, Shinji Okada, D. Faso, Florin Sirghi, Tomofumi Nagae, Hiroaki Ohnishi, T. Yamazaki, T. Kim, D. Sirghi, Y. Kato, Y. Ishiguro, C. Guaraldo, Yue Ma, G. A. Beer, K. Inoue, H. Outa, Alessandro Scordo, Catalina Curceanu, T. Hashimoto, Michael Cargnelli, Hiroyuki Noumi, M. Sekimoto, T. Suzuki, J. Marton, Shigeru Ishimoto, T. Ishiwatari, Y. Sada, M. Iwai, Akihiro Toyoda, L. Busso, S. Y. Suzuki, S. Ajimura, Masami Iio, D. Tomono, Atsushi Sakaguchi, H. Tatsuno, M. Iliescu, Makoto Tokuda, Ken Suzuki, Paul Buehler, K. Kato, M. Bragadireanu, O. Vazquez Doce, Tomokazu Fukuda, Y. Fujiwara, H. C. Bhang, Yutaka Mizoi, Carolina Berucci, H. Yim, Toshihiko Hiraiwa, Hexi Shi, Ryugo S. Hayano, Kotaro Shirotori, M. Iwasaki, S. Choi, Q. Zhang, M. Sato, T. Yamaga, Kiyoshi Tanida, Shun Enomoto, E. Widmann, T. Ishikawa, Johann Zmeskal, B. K. Wuenschek, K. Tsukada, O. Morra, K. Piscicchia, Yasuhiro H. Matsuda, and Paul Kienle
Subjects: Physics, Deuterium, Hydrogen, chemistry, Yield (chemistry), Hadron, Bound state, Elementary reaction, Physical chemistry, chemistry.chemical_element, Neutron, Atomic physics, Helium
Abstract: We have searched for the simplest kaonic nuclear state, KNN, using the in-flight 3He (K-, n) reaction at the J-PARC hadron experimental facility. In the semi-inclusive neutron missing-mass spectrum at θnlab=0°, an excess of yield was observed just below the K- pp mass-threshold, which cannot be explained by any elementary reactions [PTEP 2015, 061D01]. To understand the missing-mass spectrum of 3He (K-, n) X, we investigated the elementary (K-, n) reactions using hydrogen and deuterium targets. The p (K-, n) X missing-mass spectrum was well described by the charge-exchange reaction. However, in the d (K-, n) X spectrum, we observed an excess of yield just below the K- p mass-threshold, which was similar to that in the 3He (K-, n) X spectrum. (Less)
Published: 2016

11. Timing resolution of the FINUDA scintillation detectors

Author: E. M. Fiore, V. Paticchio, M. Palomba, D. Faso, B. Dalena, A. Pantaleo, G. D’Erasmo, D. Di Santo, G. Simonetti, and A. Andronenkov
Subjects: Physics, Nuclear and High Energy Physics, Scintillation, Physics::Instrumentation and Detectors, business.industry, Resolution (electron density), Detector, Synchronizing, Scintillator, Flashing, Nuclear physics, Optics, business, Instrumentation, Laser light
Abstract: Experimental characterizations of scintillation detectors timing performance of the internal (TOFINO) and external (TOFONE) scintillator barrels used in FINUDA experiment are presented. The measurements take advantage of detecting synchronous particle pairs produced in the reactions, namely e + e - pairs from Bhabha collisions between the primary beams and K + K - pairs from φ (1020) decay. The method used for synchronizing the multiple detectors constituting the scintillator barrels is also described as being carried out in two steps: a rough one online by the injection of laser light pulses flashing the scintillators all together, and a fine one offline exploiting the timing features of e + e - and K + K - pairs.
Published: 2009

12. Measurement of the proton spectra from non-mesonic weak decay of 5ΛHe, 7ΛLi and 12ΛC

Author: E. M. Fiore, Haruhiko Outa, Paolo Montagna, D. Nakajima, A. Andronenkov, G. Simonetti, F. Pompili, V. Tereshchenko, Paolo Camerini, Elena Botta, D. Calvo, H. C. Bhang, M. Palomba, G. D'Erasmo, A. Filippi, Rinaldo Rui, S. Marcello, A. Feliciello, G. A. Beer, O. Morra, F. De Mori, S. Piano, V. Lucherini, B. Dalena, E. Pace, M. Bertani, Marco Bregant, O. Hartmann, Tomofumi Nagae, D. Faso, Michelangelo Agnello, Adriano Fontana, Y. Lee, Michele Arturo Caponero, Stefania Bufalino, Tullio Bressani, F. L. Fabbri, A. Pantaleo, Aldo Zenoni, Tomofumi Maruta, Paola Gianotti, Hiroyuki Fujioka, A. Panzarasa, N. Mirfakhrai, L. Busso, B. H. Kang, Luigi Benussi, V. Lenti, V. Paticchio, R. Wheadon, N. Grion, Akihisa Toyoda, Stefano Bianco, D. Elia, Michiko Sekimoto, Alexey Krasnoperov, Germano Bonomi, and V. Manzari
Subjects: Physics, Nuclear and High Energy Physics, Nuclear Theory, State (functional analysis), Lower limit, Spectral line, law.invention, Nuclear physics, Low energy, law, Physics::Accelerator Physics, Proton spectra, Atomic physics, Nuclear Experiment, Collider
Abstract: The results of a measurement of the proton spectra following the non-mesonic weak decay of 5ΛHe, 7ΛLi and 12ΛC are presented and discussed. The experiment was performed at the ( e + e − ) collider DAΦNE at Laboratori Nazionale di Frascati of INFN. It is the first measurement for 7ΛLi, and for all the spectra the lower limit on the energy of the protons is 15 MeV, never reached before. All the spectra show a similar shape, namely a peak at around 80 MeV as expected for the free Λ p → n p weak reaction, with a low energy rise that should be due to final state interactions and/or two-nucleon induced weak processes. The decay spectrum of 5ΛHe is somehow similar to the ones reported by previous measurements and theoretical calculations, but the same does not happen for the 12ΛC one.
Published: 2008

13. Correlated Λd pairs from the Kstop−A→ΛdA′ reaction

Author: H. So, V. Paticchio, Sandro Tomassini, Alessandro Feliciello, D. Di Santo, F. Pompili, R. Wheadon, Paolo Camerini, Michelangelo Agnello, A. Panzarasa, Elena Botta, H. C. Bhang, L. Busso, Tomofumi Nagae, Germano Bonomi, N. Grion, G. Simonetti, F. L. Fabbri, M. Pallotta, V. Lenti, V. Lucherini, V. Manzari, A. Olin, D. Faso, V. Filippini, M. E. Fiore, F. De Mori, P. Cerello, O. Morra, D. Calvo, A. Pantaleo, M. Caponero, Aldo Zenoni, G. D'Erasmo, Akihisa Toyoda, Tomofumi Maruta, Haruhiko Outa, Rinaldo Rui, S. Marcello, Tullio Bressani, L. Benussi, R. Fini, M. Palomba, E. Pace, M. Bertani, Hiroyuki Fujioka, S. Piano, Stefania Bufalino, N. Mirfakhrai, A. Krasnoperov, A. Filippi, R. Donà, V. Tereshchenko, Paola Gianotti, Marco Bregant, B. Dalena, G. A. Beer, O. Hartmann, Stefano Bianco, and D. Elia
Subjects: Physics, Nuclear and High Energy Physics, Spectrometer, chemistry, Deuterium, Yield (chemistry), Binding energy, chemistry.chemical_element, Lithium, Invariant mass, Atomic physics, Few-body systems, Absorption (electromagnetic radiation)
Abstract: Correlated Λd pairs emitted after the absorption of negative kaons at rest K stop − A → Λ d A ′ in light nuclei 6Li and 12C are studied. Λ-hyperons and deuterons are found to be preferentially emitted in opposite directions. The Λd invariant mass spectrum of 6Li shows a bump whose mass is 3251 ± 6 MeV / c 2 . The bump mass (binding energy), width and yield are reported. The appearance of a bump is discussed in the realm of the [ K ¯ 3 N ] clustering process in nuclei. The experiment was performed with the FINUDA spectrometer at DAΦNE (LNF).
Published: 2007

14. Study of the proton weak decay of 12 ΛCg.s. with FINUDA

Author: A. Feliciello, V. Lucherini, Michelangelo Agnello, E. M. Fiore, O. Hartmann, Stefano Bianco, D. Elia, Rinaldo Rui, S. Marcello, Tullio Bressani, A. Pantaleo, Paola Gianotti, N. Mirfakhrai, Paolo Camerini, D. Calvo, M. Pallotta, Sandro Tomassini, R. Wheadon, Stefano Piano, G. Simonetti, O. Morra, N. Grion, Germano Bonomi, G. D'Erasmo, F. Pompili, V. Manzari, B. Dalena, Elena Botta, V. Tereshchenko, G. A. Beer, F. De Mori, A. Panzarasa, L. Busso, H. C. Bhang, F. L. Fabbri, Stefania Bufalino, D. Di Santo, V. Lenti, V. Paticchio, D. Faso, Tomofumi Nagae, E. Pace, M. Bertani, Haruhiko Outa, Hiroyuki Fujioka, Alexey Krasnoperov, Marco Bregant, H. So, Luigi Benussi, P. Cerello, A. Filippi, Akihiro Toyoda, R. Fini, M. Palomba, Michele Arturo Caponero, V. Filippini, Aldo Zenoni, and Tomofumi Maruta
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Proton, Nuclear Theory, Hadron, law.invention, Nuclear physics, law, Physics::Accelerator Physics, Nuclear fusion, Proton spectra, High Energy Physics::Experiment, Nuclear Experiment, Collider
Abstract: The FINUDA experiment studies the Λ-hypernuclei formation and decay using the reaction (K stop − , π−) induced by the low-momentum K − from the deacy of the φ-meson produced at the (e +, e−) collider DAφNE at the Laboratory Nazionali di Frascati of INFN. In this paper we present new data on the proton spectra following the weak decay of Λ 12 C.
Published: 2007

15. 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

16. Spectroscopic Study of Hyperon Resonances below $\bar{K}N$ Threshold via the $\left( K^{ - },n \right)$ Reaction on Deuteron

Author: Mario Bragadireanu, Johann Marton, O. Morra, T. Suzuki, K. Tsukada, S. Kawasaki, M. Poli Lener, S. Choi, H. Fujioka, M. Iwai, T. Yamaga, K. Shirotori, Toshihiko Hiraiwa, Shinji Okada, Ken Suzuki, S. Ishimoto, Haruhiko Outa, M. Iwasaki, Y. Mizoi, T. Yamazaki, Michael Cargnelli, K. Inoue, C. Guaraldo, Hiroaki Ohnishi, M. Sekimoto, A. Romero Vidal, Hexi Shi, T. Ishikawa, Tomokazu Fukuda, Hiroyuki Noumi, L. Busso, H. Kou, M. Iliescu, H. C. Bhang, E. Widmann, Y. Fujiwara, T. Hashimoto, J. Zmeskal, Makoto Tokuda, G. A. Beer, Masatoshi Sato, Ryugo S. Hayano, Y. Ishiguro, D. Tomono, S. Ajimura, Masami Iio, S. Y. Suzuki, Florin Sirghi, T. Tanida, Tomofumi Nagae, Q. Zhang, Paul Buehler, Yue Ma, D. Faso, Y. Sada, Y. Kato, P. Kienle, O. Vazquez Doce, Aya Sakaguchi, Akihiro Toyoda, H. Yim, Fuminori Sakuma, Al Scordo, K. Itahashi, Catalina Curceanu, Diana Sirghi, T. Ishiwatari, K. Piscicchia, Yasuhiro H. Matsuda, H. Tatsuno, B. K. Wuenschek, and Shun Enomoto
Subjects: Physics, Nuclear physics, Nuclear magnetic resonance, Deuterium, Bar (music), Hyperon
Published: 2015

17. Search for the deeply bound K-pp state from the semi-inclusive forward-neutron spectrum in the in-flight K- reaction on helium-3

Author: S. Kawasaki, T. Yamaga, Kiyoshi Tanida, Kristian Piscicchia, M. Iwasaki, Yutaka Mizoi, Johann Zmeskal, Diana Sirghi, Catalina Curceanu, Shinji Okada, C. Guaraldo, Ryugo S. Hayano, Paul Kienle, Takashi Ishikawa, Fuminori Sakuma, Eberhard Widmann, Florin Sirghi, Makoto Tokuda, Johann Marton, D. Faso, Shoji Suzuki, Shigeru Ishimoto, Hiroyuki Fujioka, H. Tatsuno, G. Beer, Michiko Sekimoto, Takatoshi Suzuki, D. Tomono, Oton Vazquez Doce, K. Inoue, M. Iliescu, Hexi Shi, Tomofumi Nagae, Kenta Itahashi, Atsushi Sakaguchi, Hyoungchan Bhang, O. Morra, Y. Kato, S. Ajimura, Masami Iio, Alessandro Scordo, Yasuyuki Matsuda, T. Hashimoto, Mario Bragadireanu, Hiroaki Ohnishi, Toshimitsu Yamazaki, Tomokazu Fukuda, Y. Fujiwara, Kyo Tsukada, Y. Ishiguro, Akihisa Toyoda, Toshihiko Hiraiwa, Shun Enomoto, Seonho Choi, Qi Zhang, Marco Poli Lener, H. Yim, M. Iwai, Haruhiko Outa, Hiroyuki Noumi, H. Kou, Michael Cargnelli, Yue Ma, L. Busso, Y. Sada, Antonio Romero Vidal, and M. Sato
Subjects: Physics, 010308 nuclear & particles physics, Binding energy, Hadron, General Physics and Astronomy, FOS: Physical sciences, State (functional analysis), Lambda, 01 natural sciences, 7. Clean energy, 3. Good health, ddc, Nuclear physics, Helium-3, 0103 physical sciences, Bound state, Neutron, Production (computer science), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract: An experiment to search for the $K^-pp$ bound state was performed via the in-flight $^3$He($K^-,n)$ reaction using 5.3 $\times$ $10^9$ kaons at 1 GeV/$c$ at the J-PARC hadron experimental facility. In the semi-inclusive neutron missing-mass spectrum at $\theta_{n}^{lab}=0^\circ$, no significant peak was observed in the region corresponding to $K^-pp$ binding energy larger than 80 MeV, where a bump structure has been reported in the $\Lambda p$ final state in different reactions. Assuming the state to be isotropically decaying into $\Lambda p$, mass-dependent upper limits on the production cross section were determined to be 30--180, 70--250, and 100--270 $\mu$b/sr, for the natural widths of 20, 60, and 100 MeV, respectively, at 95\% confidence level., Comment: 12 pages, 6 figures
Published: 2015

18. Search for HΛ6 and HΛ7 with the (Kstop−,π+) reaction

Author: F. De Mori, H. So, V. Filippini, A. Feliciello, Stefano Bianco, F. L. Fabbri, E. Pace, D. Elia, M. Bertani, Sandro Tomassini, Haruhiko Outa, L. Benussi, A. Olin, Aldo Zenoni, Tomofumi Maruta, Paolo Camerini, V. Tereshchenko, G. A. Beer, R. Don, M. E. Fiore, Akihisa Toyoda, Michelangelo Agnello, A. Filippi, Rinaldo Rui, V. Lenti, S. Marcello, O. Morra, R. Wheadon, N. Grion, G. Simonetti, Paola Gianotti, V. Manzari, D. Calvo, Tomofumi Nagae, A. Pantaleo, D. Faso, V. Paticchio, Marco Bregant, Tullio Bressani, S. Piano, M. Caponero, Elena Botta, F. Pompili, G. D'Erasmo, P. Cerello, H. C. Bhang, N. Mirfakhrai, D. Di Santo, B. Dalena, A. Panzarasa, V. Lucherini, L. Busso, Hiroyuki Fujioka, M. Pallotta, Alexey Krasnoperov, R. Fini, and M. Palomba
Subjects: Nuclear physics, Momentum, Physics, Nuclear and High Energy Physics, Spectrometer, Pi, Analytical chemistry, Neutron, Lambda, Spectral line
Abstract: The production of neutron rich Λ-hypernuclei via the ( K stop − , π + ) reaction has been studied using data collected with the FINUDA spectrometer at the DAΦNE ϕ-factory (LNF). The analysis of the inclusive π + momentum spectra is presented and an upper limit for the production of H Λ 6 and H Λ 7 from 6Li and 7Li, is assessed for the first time.
Published: 2006

19. CLAM, a continuous line alignment and monitoring method for RICH mirrors

Author: S. Dalla Torre, A. Latina, D. Faso, F. Tessarotto, J-Ch. Gayde, and S. Costa
Subjects: Surface (mathematics), Physics, Nuclear and High Energy Physics, Optics, business.industry, Compass, Line (geometry), Sensitivity (control systems), Monitoring methods, Classification of discontinuities, business, Instrumentation
Abstract: A method is proposed for the angular alignment of RICH mirrors and for its monitoring, in particular for the COMPASS RICH-1 mirror system. Observing (by means of four cameras) apparent discontinuities in the images of continuous linear objects reflected by the mirrors surface, a relative misalignment of adjacent mirrors can be deduced and then corrected. The method can attain a sensitivity of at least 0.1 mrad, and can also be applied on-line to keep under control the stability of the mirrors during data taking.
Published: 2005

20. 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

21. Absolute calibration of the amplitude threshold of the FINUDA external scintillator barrel

Author: E.M. Fiore, S. Piano, G. Simonetti, D. Calvo, D. Di Santo, G. D’Erasmo, M. Palomba, D. Faso, B. Dalena, V. Paticchio, and A. Pantaleo
Subjects: Physics, Nuclear and High Energy Physics, Scintillation, Physics::Instrumentation and Detectors, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Barrel (horology), Absolute value, Cosmic ray, Scintillator, Absolute calibration, Nuclear physics, Optics, Amplitude, Neutron detection, business, Instrumentation
Abstract: Two different experimental methods, based on cosmic rays measurements, have been investigated to calibrate in absolute units the scintillation light detected, near the threshold, at both ends of the long scintillators constituting the External Scintillator Barrel of the FINUDA experiment. The first one is based on the selection of the cosmic rays intercepting also the vertex detectors. The second one takes into account all the cosmic rays detected by the barrel itself. Both methods are shown to be able to evaluate with enough precision an absolute value of the threshold for neutron detection efficiency calculations.
Published: 2005

22. The upgrade project of the RICH-1 of the COMPASS Experiment

Author: P. Abbon, M. Alekseev, H. Angerer, R. Birsa, M. Bordalo, L. Busso, M. Chiosso, O. Cobanoglu, M. L. Colantoni, S. Dalla Torre, T. Dafni, E. Delagnes, H. Deshamps, V. Diaz, N. Dibiase, W. Eyrich, D. Faso, A. Ferrero, M. Finger, M. Finger Jr, H. Fischer, S. Gerassimov, B. Gobbo, R. Hagemann, D. von Harrach, F. H. Heinsius, R. Joosten, B. Ketzer, K. Konigsmann, V. N. Kolosov, I. Konorov, F. Kunne, A. Lehmann, A. Maggiora, A. Magnon, A. Mann, G. Mazza, G. Menon, A. Mutter, O. Nahle, F. Nerling, D. Neyret, S. Panebianco, D. Panzieri, S. Paul, J. Polak, D. Rebourgeard, F. Robinet, E. Rocco, C. Schill, W. Schroder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, S. Takekawa, F. Tessarotto, A. Teufel, H. Wollny, BRADAMANTE, FRANCO, BRESSAN, Andrea, CILIBERTI, PIERO, DUIC, VENICIO, GIORGI, MARCELLO, LEVORATO, STEFANO, MARTIN, ANNA, PESARO, GIULIA, SCHIAVON, PAOLO, P., Abbon, M., Alekseev, H., Angerer, R., Birsa, M., Bordalo, Bradamante, Franco, Bressan, Andrea, L., Busso, M., Chiosso, Ciliberti, Piero, O., Cobanoglu, M. L., Colantoni, S., Dalla Torre, T., Dafni, E., Delagne, H., Deshamp, V., Diaz, N., Dibiase, Duic, Venicio, W., Eyrich, D., Faso, A., Ferrero, M., Finger, M., Finger Jr, H., Fischer, S., Gerassimov, Giorgi, Marcello, B., Gobbo, R., Hagemann, D., von Harrach, F. H., Heinsiu, R., Joosten, B., Ketzer, K., Konigsmann, V. N., Kolosov, I., Konorov, F., Kunne, A., Lehmann, Levorato, Stefano, A., Maggiora, A., Magnon, A., Mann, Martin, Anna, G., Mazza, G., Menon, A., Mutter, O., Nahle, F., Nerling, D., Neyret, S., Panebianco, D., Panzieri, S., Paul, Pesaro, Giulia, J., Polak, D., Rebourgeard, F., Robinet, E., Rocco, Schiavon, Paolo, C., Schill, W., Schroder, L., Silva, M., Slunecka, F., Sozzi, L., Steiger, M., Sulc, M., Svec, S., Takekawa, F., Tessarotto, A., Teufel, and H., Wollny
Subjects: Compass Experiment
Published: 2009

23. The search for deeply bound kaonic nuclear states at J-PARC

Author: Yuuki Fujiwara, Shinji Okada, T. Ishiwatari, Tomofumi Nagae, T. Yamazaki, Yutaka Mizoi, Haruhiko Outa, H. Tatsuno, A. Romero Vidal, Yasuyuki Matsuda, Toshihiko Hiraiwa, Hiroaki Ohnishi, L. Busso, K. Inoue, Florin Sirghi, Hiroyuki Noumi, Michael Cargnelli, H. C. Bhang, Makoto Tokuda, T. Ishikawa, Johann Zmeskal, H. Kou, M. Poli Lener, T. Suzuki, S. Y. Suzuki, H. Yim, M. Sato, Kyo Tsukada, Shun Enomoto, D. Tomono, S. Ajimura, Masami Iio, M. Iwai, T. Hashimoto, Y. Sada, Ryugo S. Hayano, Paul Kienle, S. Choi, D. Faso, C. Guaraldo, K. Itahashi, D. Pietreanu, Hexi Shi, M. Sekimoto, G. A. Beer, Johann Marton, Atsushi Sakaguchi, Fuminori Sakuma, Tomokazu Fukuda, O. Morra, Eberhard Widmann, Masahiko Iwasaki, Diana Sirghi, Catalina Curceanu, Akihiro Toyoda, M. Iliescu, S. Ishimoto, Mario Bragadireanu, Paul Buehler, O. Vazquez Doce, Ken Suzuki, and Hiroyuki Fujioka
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Kaonic nuclei, strangeness physics, J-PARC, Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Neutron spectroscopy, Nuclear physics, Feature (computer vision), TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Invariant mass
Abstract: The J-PARC E15 experiment aims to search for the lightest kaonic nuclear states, namely K-pp, using in-flight (K-, n) reaction on 3 He . In this experiment, the missing mass in the (K-, n) reaction and the invariant mass of the decay such as K-pp → Λp → pπ-p will be measured simultaneously. In this article, the experimental feature and the present status are presented.
Published: 2011

24. Spectroscopic study of Λ(1405) via the in-flight (K-,n) reaction on deuteron

Author: S. Enomoto, S. Ajimura, G. Beer, H. Bhang, M. Bragadireanu, P. Buehler, L. Busso, M. Cargnelli, S. Choi, C. Curceanu, D. Faso, H. Fujioka, Y. Fujiwara, T. Fukuda, C. Guaraldo, T. Hashimoto, R. Hayano, T. Hiraiwa, M. Iio, K. Inoue, N. Ishibashi, T. Ishikawa, S. Ishimoto, T. Ishiwatari, K. Itahashi, M. Iwai, M. Iwasaki, S. Kawasaki, P. Kienle, H. Kou, J. Marton, Y. Matsuda, Y. Mizoi, O. Morra, T. Nagae, H. Noumi, H. Ohnishi, S. Okada, H. Outa, Y. Sada, A. Sakaguchi, F. Sakuma, M. Sato, M. Sekimoto, H. Shi, D. Sirghi, F. Sirghi, S. Suzuki, T. Suzuki, H. Tatsuno, M. Tokuda, D. Tomono, A. Toyoda, K. Tsukada, E. Widmann, T. Yamazaki, H. Yim, K. Yoshida, J. Zmeskal, Atsushi Hosaka, Kanchan Khemchandani, Hideko Nagahiro, and Kanabu Nawa
Subjects: Physics, Nuclear physics, Nuclear reaction, Pion, Deuterium, Isospin, Hadron, Hyperon, Nucleon, Lambda baryon
Abstract: We present an experimental study of Λ(1405) via the in‐flight (K−,n) reaction on the deuteron target (J‐PARC E31). We will measure all Σ+π−, Σ−π+ and Σ0π0 final states so that the isospin structure of the produced hyperon resonance state can be decomposed. In this report, we present an overview of the experiment and preparation status.
Published: 2011

25. Characterization of Thick film of Copper Electrodeposited for Cryogenic Applications

Author: Colantoni, D. Faso, A. Luzzi, Ivan Davoli, M. Tomellini, Massimiliano Lucci, I. Ottaviani, Rosalba Fittipaldi, A. Fava, Matteo Salvato, and Antonio Vecchione
Subjects: Materials science, Renewable Energy, Sustainability and the Environment, Metallurgy, Mineralogy, chemistry.chemical_element, Condensed Matter Physics, Copper, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Characterization (materials science), Settore FIS/03 - Fisica della Materia, chemistry, Materials Chemistry, Electrochemistry
Published: 2014

26. A search for the K-pp bound state in the 3He(K- in-flight, n) reaction at J-PARC

Author: Ken Suzuki, S. Ishimoto, Michael Cargnelli, Mario Bragadireanu, Ryugo S. Hayano, H. Kou, S. Y. Suzuki, C. Guaraldo, K. Inoue, Johann Marton, G. A. Beer, L. Busso, S. Kawasaki, K. Piscicchia, T. Hashimoto, Paul Kienle, Hiroyuki Fujioka, Q. Zhang, S. Choi, Catalina Curceanu, Makoto Tokuda, D. Tomono, Florin Sirghi, M. Iliescu, Kyo Tsukada, J. Zmeska, Atsushi Sakaguchi, S. Ajimura, Masami Iio, Y. Kato, Hyoungchan Bhang, K. Itahashi, Paul Buehler, Yuuki Fujiwara, Shun Enomoto, O. Morra, Toshihiko Hiraiwa, D. Faso, Yasuyuki Matsuda, Tomofumi Nagae, O. Vazquez Doce, M. Poli Lener, Yue Ma, A. Romero Vida, B. K. Wuenschek, Eberhard Widmann, Tomokazu Fukuda, H. Yim, Haruhiko Outa, Shinji Okada, Masahiko Iwasaki, T. Yamazaki, Hiroyuki Noumi, Y. Sada, Yutaka Mizoi, Akihiro Toyoda, Y. Ishiguro, Fuminori Sakuma, T. Suzuki, Hiroaki Ohnishi, H. Tatsuno, Alessandro Scordo, Michiko Sekimoto, T. Ishikawa, T. Ishiwatari, T. Yamaga, Kiyoshi Tanida, Hexi Shi, Masatoshi Sato, M. Iwai, and Diana Sirghi
Subjects: Physics, Nuclear physics, Spectrometer, QC1-999, Bound state, Neutron, Statistical physics, J-PARC
Abstract: We have collected the first physics data of an experimental search for the simplest kaonic nuclear bound state, “ K − pp”, by the 3He( K − n) reaction at J-PARC. We confirmed that our spectrometer system works as designed and observed clear peak structure composed of the quasi-elastic K − “ n ” → K − n and the charge-exchange K − “ p ” → ¯ K 0 n reactions in the forward neutron spectrum.
Published: 2014

27. Search for the K-pp bound state via the in-flight 3He(K-, n) reaction

Author: C. Guaraldo, Michiko Sekimoto, Hiroaki Ohnishi, G. A. Beer, T. Ishiwatari, K. Itahashi, M. Iliescu, A. Romero Vidal, Toshihiko Hiraiwa, L. Busso, K. Inoue, H. Tatsuno, Eberhard Widmann, Yasuyuki Matsuda, S. Kawasaki, J. Zmeskal, Florin Sirghi, T. Yamaga, Ryugo S. Hayano, Makoto Tokuda, Kiyoshi Tanida, Y. Sada, Tomofumi Nagae, S. Choi, O. Morra, Johann Marton, Hiroyuki Fujioka, Masahiko Iwasaki, Paul Buehler, Michael Cargnelli, D. Faso, T. Ishikawa, Diana Sirghi, M. Poli Lener, Catalina Curceanu, M. Iwai, T. Suzuki, Hyoungchan Bhang, T. Hashimoto, O. Vazquez Doce, Kyo Tsukada, Akihiro Toyoda, Fuminori Sakuma, Shun Enomoto, B. K. Weunschek, Y. Kato, Alessandro Scordo, Y. Ishiguro, K. Piscicchia, Q. Zhang, P. Kienle, Hexi Shi, H. Yim, S. Ajimura, Masami Iio, Masatoshi Sato, Shinji Okada, Mario Bragadireanu, S. Ishimoto, T. Yamazaki, Ken Suzuki, Atsushi Sakaguchi, Tomokazu Fukuda, Y. Fujiwara, Yutaka Mizoi, D. Tomono, Yue Ma, Haruhiko Outa, Hiroyuki Noumi, H. Kou, and S. Y. Suzuki
Subjects: Nuclear physics, Physics, QC1-999, Bound state, Analytical chemistry, Neutron, lcsh:Physics, lcsh:QC1-999
Abstract: In the J-PARC E15 experiment, a K − pp search was performed via the 3 He(K − , n ) reaction at 1.0 GeV/c . A forward-going neutron is detected by a neutron counter with 15 m flight length, and decay particles from K − pp are simultaneously measured by a cylindrical detector system that surrounds a liquid 3 He target system. In March and May, 2013, we carried out the first physics data-taking with 5×109 incident kaons on the 3 He target, and we have obtained a preliminary exclusive analysis result of 3 He(K − , Λp )n reaction.
Published: 2014

28. 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

29. STUDY OF THE (K +,K 0) REACTION ON MEDIUM LIGHT NUCLEI CLOSE TO THRESHOLD

Author: M. AGNELLO, G. BEER, L. BENUSSI, M. BERTANI, H. C. BHANG, S. BIANCO, G. BONOMI, E. BOTTA, M. BREGANT, T. BRESSANI, S. BUFALINO, L. BUSSO, D. CALVO, CAMERINI, Paolo, M. CAPONERO, P. CERELLO, B. DALENA, G. DERASMO, F. DE MORI, D. DI SANTO, D. ELIA, F. L. FABBRI, D. FASO, A. FELICIELLO, A. FILIPPI, V. FILIPPINI, R. A. FINI, E. M. FIORE, H. FUJIOKA, P. GIANOTTI, N. GRION, O. HARTMANN, A. KRASNOPEROV, V. LENTI, V. LUCHERINI, 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, G. SIMONETTI, H. SO, V. TERESHCHENKO, S. TOMASSINI, A. TOYODA, R. WHEADON, A. ZENONI, RUI, RINALDO, M., Agnello, G., Beer, L., Benussi, M., Bertani, H. C., Bhang, S., Bianco, G., Bonomi, E., Botta, M., Bregant, T., Bressani, S., Bufalino, L., Busso, D., Calvo, Camerini, Paolo, M., Caponero, P., Cerello, B., Dalena, G., Derasmo, F., DE MORI, D., DI SANTO, D., Elia, F. L., Fabbri, D., Faso, A., Feliciello, A., Filippi, V., Filippini, R. A., Fini, E. M., Fiore, H., Fujioka, P., Gianotti, N., Grion, O., Hartmann, A., Krasnoperov, V., Lenti, V., Lucherini, 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., Tereshchenko, S., Tomassini, A., Toyoda, R., Wheadon, and A., Zenoni
Published: 2007

30. A highly integrated low-cost readout system for the COMPASS RICH-1 detector2007 IEEE Nuclear Science Symposium Conference Record

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, P. Bordalo, L. Busso, M. Chiosso, M. L. Colantoni, S. Costa, T. Dafni, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, M. Georgi, S. Gerassimov, B. Gobbo, R. Hagemann, D. von Harrach, F. H. Heinsius, R. Joosten, B. Ketzer, V. N. Kolosov, K. Konigsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, A. Maggiora, A. Magnon, A. Mann, G. Menon, A. Mutter, O. Nahle, F. Nerling, D. Neyret, S. Panebianco, D. Panzieri, S. Paul, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, C. Schill, W. Schroder, L. Silva, M. Slunecka, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny, BIRSA, RENATO, BRADAMANTE, FRANCO, BRESSAN, Andrea, CILIBERTI, PIERO, DALLA TORRE, SILVIA, DUIC, VENICIO, LEVORATO, STEFANO, MARTIN, ANNA, PAGANO, PAOLO, PESARO, GIULIA, SCHIAVON, PAOLO, SOZZI, FEDERICA, Bo Yu, P., Abbon, M., Alekseev, H., Angerer, M., Apollonio, Birsa, Renato, P., Bordalo, Bradamante, Franco, Bressan, Andrea, L., Busso, M., Chiosso, Ciliberti, Piero, M. L., Colantoni, S., Costa, T., Dafni, DALLA TORRE, Silvia, E., Delagne, H., Deschamp, V., Diaz, N., Dibiase, Duic, Venicio, W., Eyrich, D., Faso, A., Ferrero, M., Finger, H., Fischer, M., Georgi, S., Gerassimov, B., Gobbo, R., Hagemann, D., von Harrach, F. H., Heinsiu, R., Joosten, B., Ketzer, V. N., Kolosov, K., Konigsmann, I., Konorov, D., Kramer, F., Kunne, A., Lehmann, Levorato, Stefano, A., Maggiora, A., Magnon, A., Mann, Martin, Anna, G., Menon, A., Mutter, O., Nahle, F., Nerling, D., Neyret, Pagano, Paolo, S., Panebianco, D., Panzieri, S., Paul, Pesaro, Giulia, C., Pizzolotto, J., Polak, P., Rebourgeard, F., Robinet, E., Rocco, Schiavon, Paolo, C., Schill, W., Schroder, L., Silva, M., Slunecka, Sozzi, Federica, L., Steiger, M., Sulc, M., Svec, F., Tessarotto, A., Teufel, and H., Wollny
Subjects: Photons, Readout systems, Photodetectors, Field emission cathodes, Detectors, Detectors, Field emission cathodes, Particle beams, Photodetectors, Photomultipliers, Photons, Readout systems, Particle beams, Photomultipliers
Abstract: Particle identification at high multiplicities is a key feature of the COMPASS experiment at CERN's SPS. Hadrons up to 50 GeV/c are identified by a RICH detector with a large horizontal and vertical acceptance of ±250 mrad and ±180 mrad, respectively. The central region of the photon detector is equipped with multi-anode photomultiplier tubes, the remaining 75% of the total active area are covered by MWPCs with CsI photocathodes. In order to improve the performance of the detector at very high beam intensities, more than 62000 channels of a new analog readout system of file MWPCs, based on the APV25 chip, were developed and installed in 2006. The new system features good single photon detection efficiency due to its low noise, negligible dead time at trigger rates up to 50 kHz, and low cost. In addition, sampling of the MWPC signal allows us to measure the signal time with a resolution of about 30 ns or better. The architecture of the new readout system as well as the performance results of the RICH-1 detector in the outer region during 2006 COMPASS run will be discussed
Published: 2007

31. 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

32. Study of the proton weak decay of (Lambda)C-12(g.s.) with FINUDA

Author: M. AGNELLO, G. BEER, L. BENUSSI, M. BERTANI, H. C. BHANG, S. BIANCO, G, BONOMI, E. BOTTA, M. BREGANT, T. BRESSANI, S. BUFALINO, L. BUSSO, D. CALVO, M. CAPONERO, P. CERELLO, B. DALENA, F. DE MORI, G. D'ERASMO, D. DI SANTO, D. ELIA, F. L. FABBRI, D. FASO, A. FELICIELLO, A. FILIPPI, V. FILIPPINI, R. A. FINI, E. M. FIORE, H. FUJIOKA, P. GIANOTTI, N. GRION, O. HARTMANN, A. KRASNOPEROV, V. LENTI, V. LUCHERINI, 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, G. SIMONETTI, H. SO, V. TERESHCHENKO, S. TOMASSINI, A. TOYODA, R. WHEADON, A. ZENONI, CAMERINI, Paolo, RUI, RINALDO, M., Agnello, G., Beer, L., Benussi, M., Bertani, H. C., Bhang, S., Bianco, G, Bonomi, E., Botta, M., Bregant, T., Bressani, S., Bufalino, L., Busso, D., Calvo, Camerini, Paolo, M., Caponero, P., Cerello, B., Dalena, F., DE MORI, G., D'Erasmo, D., DI SANTO, D., Elia, F. L., Fabbri, D., Faso, A., Feliciello, A., Filippi, V., Filippini, R. A., Fini, E. M., Fiore, H., Fujioka, P., Gianotti, N., Grion, O., Hartmann, A., Krasnoperov, V., Lenti, V., Lucherini, 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., Tereshchenko, S., Tomassini, A., Toyoda, R., Wheadon, and A., Zenoni
Published: 2007

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

Author: M. AGNELLO, G. BEER, L. BENUSSI, M. BERTANI, H. C. BHANG, S. BIANCO, G. BONOMI, E. BOTTA, M. BREGANT, T. BRESSANI, S. BUFALINO, L. BUSSO, D. CALVO, M. CAPONERO, P. CERELLO, B. DALENA, F. DE MORI, G. D'ERASMO, D. DI SANTO, D. ELIA, F. L. FABBRI, D. FASO, A. FELICIELLO, V. FILIPPI, V. FILIPPINI, R. A. FINI, E. M. FIORE, H. FUJIOKA, P. GIANOTTI, N. GRION, O. HARTMANN, H. B. KANG, A. KRASNOPEROV, V. LENTI, V. LUCHERINI, V. MANZARI, S. MARCELLO, T. MARUTA, N. MIRFAKHRAI, O. MORRA, T. NAGAE, A. OLIN, H. OUTA, E. PACE, M. PALLOTTA, M. PALOMBA, A. PANTALEO, A. PANZARASA, V. PATICCHIO, S. PIANO, F. POMPILI, G. SIMONETTI, H. SO, V. TERESHCHENKO, S. TOMASSINI, A. TOYODA, R. WHEADON, A. ZENONI, CAMERINI, Paolo, RUI, RINALDO, M., Agnello, G., Beer, L., Benussi, M., Bertani, H. C., Bhang, S., Bianco, G., Bonomi, E., Botta, M., Bregant, T., Bressani, S., Bufalino, L., Busso, D., Calvo, Camerini, Paolo, M., Caponero, P., Cerello, B., Dalena, F., DE MORI, G., D'Erasmo, D., DI SANTO, D., Elia, F. L., Fabbri, D., Faso, A., Feliciello, V., Filippi, V., Filippini, R. A., Fini, E. M., Fiore, H., Fujioka, P., Gianotti, N., Grion, O., Hartmann, H. B., Kang, A., Krasnoperov, V., Lenti, V., Lucherini, V., Manzari, S., Marcello, T., Maruta, N., Mirfakhrai, O., Morra, T., Nagae, A., Olin, 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., Tereshchenko, S., Tomassini, A., Toyoda, R., Wheadon, and A., Zenoni
Published: 2007

34. Correlated Λd pairs from the K−stopA→ΛdA' reaction

Author: M. Agnello, G. Beer, L. Benussi, M. Bertani, H. C. Bhang, S. Bianco, G. Bonomi, E. Botta, M. Bregant, T. Bressani, S. Bufalino, L. Busso, D. Calvo, P. Camerini, M. Caponero, P. Cerello, B. Dalena, F. De Mori, G. D’Erasmo, 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, O. Hartmann, A. Krasnoperov, V. Lucherini, V. Lenti, V. Manzari, S. Marcello, T. Maruta, N. Mirfakhrai, O. Morra, T. Nagae, A. Olin, H. Outa, E. Pace, M. Pallotta, M. Palomba, A. Pantaleo, A. Panzarasa, V. Paticchio, S. Piano, F. Pompili, R. Rui, G. Simonetti, H. So, V. Tereshchenko, S. Tomassini, A. Toyoda, R. Wheadon, A. Zenoni, DONA', ROBERTO, M. Agnello, G. Beer, L. Benussi, M. Bertani, H.C. Bhang, S. Bianco, G. Bonomi, E. Botta, M. Bregant, T. Bressani, S. Bufalino, L. Busso, D. Calvo, P. Camerini, M. Caponero, P. Cerello, B. Dalena, F. De Mori, G. D’Erasmo, D. Di Santo, R. Donà, D. Elia, F.L. Fabbri, D. Faso, A. Feliciello, A. Filippi, V. Filippini, R. Fini, M.E. Fiore, H. Fujioka, P. Gianotti, N. Grion, O. Hartmann, A. Krasnoperov, V. Lucherini, V. Lenti, V. Manzari, S. Marcello, T. Maruta, N. Mirfakhrai, O. Morra, T. Nagae, A. Olin, H. Outa, E. Pace, M. Pallotta, M. Palomba, A. Pantaleo, A. Panzarasa, V. Paticchio, S. Piano, F. Pompili, R. Rui, G. Simonetti, H. So, V. Tereshchenko, S. Tomassini, A. Toyoda, R. Wheadon, and A. Zenoni
Published: 2007

35. A study of the proton spectra following the capture of $K^-$ in $^6$Li and $^{12}$C with FINUDA

Author: O. Morra, P. Cerello, D. Faso, F. De Mori, R. Fini, M. Palomba, R. Wheadon, N. Grion, Germano Bonomi, Tomofumi Nagae, B. Dalena, V. Manzari, E. Pace, M. Bertani, Stefano Bianco, D. Di Santo, D. Elia, V. Tereshchenko, A. Panzarasa, Sandro Tomassini, Paolo Camerini, L. Busso, A. Filippi, V. Filippini, G. D'Erasmo, Alexey Krasnoperov, Hiroyuki Fujioka, V. Lucherini, Marco Bregant, A. Feliciello, H. So, Akihisa Toyoda, G. Simonetti, Aldo Zenoni, V. Paticchio, Haruhiko Outa, Tomofumi Maruta, L. Benussi, E. M. Fiore, A. Olin, V. Lenti, F. L. Fabbri, Paola Gianotti, Elena Botta, H. C. Bhang, Tullio Bressani, G. A. Beer, N. Mirfakhrai, O. Hartmann, A. Pantaleo, Stefania Bufalino, F. Pompili, Michelangelo Agnello, Rinaldo Rui, S. Marcello, M. Pallotta, D. Calvo, S. Piano, M., Agnello, G., Beer, L., Benussi, M., Bertani, H. C., Bhang, S., Bianco, G., Bonomi, E., Botta, M., Bregant, T., Bressani, S., Bufalino, 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. A., Fini, E. M., Fiore, H., Fujioka, P., Gianotti, N., Grion, O., Hartmannd, A., Krasnoperov, V., Lenti, V., Lucherini, V., Manzari, S., Marcello, T., Maruta, N., Mirfakhrai, O., Morra, T., Nagae, A., Olin, H., Outa, E., Pace, M., Pallotta, M., Palomba, A., Pantaleo, A., Panzarasa, V., Paticchio, S., Piano, F., Pompili, Rui, Rinaldo, G., Simonetti, So, H, V., Tereshchenko, S., Tomassini, A., Toyoda, R., Wheadon, and A., Zenoni
Subjects: Physics, Nuclear and High Energy Physics, Proton, Resolution (electron density), Nuclear Theory, FOS: Physical sciences, chemistry.chemical_element, Spectral line, Momentum, medicine.anatomical_structure, chemistry, Cluster (physics), medicine, Substructure, Lithium, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Atomic physics, Nuclear Experiment, Nucleus
Abstract: Momenta spectra of protons emitted following the capture of $K^-$ in $^6$Li and $^{12}$C have been measured with 1% resolution. The $^{12}$C spectrum is smooth whereas for $^6$Li a well defined peak appears at about 500 MeV/$c$. The first observation of a structure in this region was identified as a strange tribaryon or, possibly, a $\bar K$-nuclear state. The peak is correlated with a $\pi^-$ coming from $\Sigma^-$ decay in flight, selected by setting momenta larger than 275 MeV/$c$. The $\Sigma^-$ could be produced, together with a 500 MeV/$c$ proton, by the capture of a $K^-$ in a deuteron-cluster substructure of the $^6$Li nucleus. The capture rate for such a reaction is $(1.62\pm 0.23_{stat} ^{+0.71}_{-0.44}(sys))%/K^-_{stop}$, in agreement with the existing observations on $^4$He targets and with the hypothesis that the $^6$Li nucleus can be interpreted as a $(d+\alpha)$ cluster., Comment: 21 pages, 10 figures. Accepted for publication in NPA
Published: 2006

36. Hypernuclear physics with FINUDA at Dafne

Author: M. AGNELLO, G. BEER, L. BENUSSI, M. BERTANI, H. C. BHANG, S. BIANCO, E. BOTTA, M. BREGANT, T. BRESSANI, L. BUSSO, D. CALVO, M. CAPONERO, P. CERELLO, B. DALENA, F. DE MORI, G. DERASMO, D. DI SANTO, R. DONA', D. ELIA, F. L. FABBRI, D. FASO, A. FELICIELLO, A. FILIPPI, V. FILIPPINI, R. FINI, E. M. FIORE, H. FUJIOKA, P. GIANOTTI, N. GRION, A. KRASNOPEROV, V. LENTI, V. LUCHERINI, V. MANZARI, S. MARCELLO, T. MARUTA, N. MIRFAKHRAI, O. MORRA, T. NAGAE, H. OUTA, A. OLIN, E. PACE, M. PALLOTTA, M. PALOMBA, A. PANTALEO, A. PANZARASA, V. PATICCHIO, S. PIANO, F. POMPILI, RUI, RINALDO, G. SIMONETTI, H. SO, V. TERESHCHENKO, S. TOMASSINI, A. TOYODA, R. WHEADON, A. ZENONI, CAMERINI, Paolo, M., Agnello, G., Beer, L., Benussi, M., Bertani, H. C., Bhang, S., Bianco, E., Botta, M., Bregant, T., Bressani, L., Busso, D., Calvo, Camerini, Paolo, M., Caponero, P., Cerello, B., Dalena, F., DE MORI, G., Derasmo, D., DI SANTO, R., Dona', D., Elia, F. L., Fabbri, D., Faso, A., Feliciello, A., Filippi, V., Filippini, R., Fini, E. M., Fiore, H., Fujioka, P., Gianotti, N., Grion, A., Krasnoperov, V., Lenti, V., Lucherini, V., Manzari, S., Marcello, T., Maruta, N., Mirfakhrai, O., Morra, T., Nagae, H., Outa, A., Olin, E., Pace, M., Pallotta, M., Palomba, A., Pantaleo, A., Panzarasa, V., Paticchio, S., Piano, F., Pompili, Rui, Rinaldo, G., Simonetti, H., So, V., Tereshchenko, S., Tomassini, A., Toyoda, R., Wheadon, and A., Zenoni
Published: 2005

37. Studies for a fast RICH

Author: Alan D. Martin, B. Gobbo, S. Horikawa, G. Menon, R. Birsa, M.G. Alekseev, V. Diaz, M. Finger, L. Busso, D. Panzieri, P. Schiavon, V. Duic, S. Costa, Andrea Ferrero, S. Dalla Torre, Paolo Pagano, D. Faso, Daniel B. Kramer, M.L. Colantoni, N. Di Biase, F. Tessarotto, Andrea Bressan, M. Giorgi, Franco Bradamante, A. Maggiora, P. Ciliberti, Miroslav Sulc, F. Sozzi, M., Alekseev, R., Birsa, F., Bradamante, Bressan, Andrea, L., Busso, Ciliberti, Piero, M. L., Colantoni, S., Costa, S., DALLA TORRE, V., Diaz, N., DI BIASE, V., Duic, D., Faso, A., Ferrero, M., Finger, Giorgi, Marcello, B., Gobbo, S., Horikawa, D., Kramer, A., Maggiora, Martin, Anna, G., Menon, P., Pagano, D., Panzieri, Schiavon, Paolo, F., Sozzi, M., Sulc, and F., Tessarotto
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Luminosity (scattering theory), COMPASS, RICH, Multianode photomultiplier tubes, UV lenses, business.industry, Emphasis (telecommunications), Detector, Photocathode, Optics, Position (vector), COMPASS experiment, Electronics, business, Instrumentation
Abstract: We are developing the design of a photon detection system for a fast RICH, to match the requirements arising from the foreseen enlarged luminosity of the COMPASS experiment. The system is based on UV extended multianode photomultipliers and a system of fused silica lenses that collect the light from a larger surface and guide it to the PMT photocathode, preserving the position information. In our design the ratio of the collection and the photosensitive surfaces is larger than in previous applications (it is of the order of 9), to keep the costs of the photon detection system affordable, while the emphasis is on the fast response of the detectors and the associated electronics. We report about the design parameters and the preliminary test beam results.
Published: 2005

38. First results on (12)(Lambda)C production at DAΦNE

Author: M. Agnello, G. Beer, L. Benussi, M. Bertani, H. C. Bhang, S. Bianco, E. Botta, M. Bregant, T. Bressani, L. Busso, D. Calvo, P. Camerini, M. Caponero, P. Cerello, B. Dalena, F. De Mori, G. D'Erasmo, 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, A. Krasnoperov, V. Lucherini, V. Lenti, V. Manzari, S. Marcello, T. Maruta, N. Mirfakhrai, O. Morra, T. Nagae, A. Olin, H. Outa, E. Pace, M. Pallotta, M. Palomba, A. Pantaleo, A. Panzarasa, V. Paticchio, S. Piano, F. Pompili, R. Rui, G. Simonetti, H. So, V. Tereshchenko, S. Tomassini, A. Toyoda, R. Wheadon, A. Zenoni, DONA', ROBERTO, M. Agnello, G. Beer, L. Benussi, M. Bertani, H.C. Bhang, S. Bianco, E. Botta, M. Bregant, T. Bressani, L. Busso, D. Calvo, P. Camerini, M. Caponero, P. Cerello, B. Dalena, F. De Mori, G. D'Erasmo, D. Di Santo, R. Donà, D. Elia, F.L. Fabbri, D. Faso, A. Feliciello, A. Filippi, V. Filippini, R. Fini, M.E. Fiore, H. Fujioka, P. Gianotti, N. Grion, A. Krasnoperov, V. Lucherini, V. Lenti, V. Manzari, S. Marcello, T. Maruta, N. Mirfakhrai, O. Morra, T. Nagae, A. Olin, H. Outa, E. Pace, M. Pallotta, M. Palomba, A. Pantaleo, A. Panzarasa, V. Paticchio, S. Piano, F. Pompili, R. Rui, G. Simonetti, H. So, V. Tereshchenko, S. Tomassini, A. Toyoda, R. Wheadon, and A. Zenoni
Subjects: Phi-factory, hypernuclear spectroscopy, Nuclear Theory, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Lambda-hypernuclei are produced and studied, with the FINUDA spectrometer, for the first time at an e+e- collider: DAPHNE, the Frascati phi-factory. The slow negative kaons from phi(1020) decay are stopped in thin (0.2 g/cm^2) nuclear targets, and Lambda-hypernuclei formation is detected by measuring the momentum of the outgoing pi^-. A preliminary analysis on 12Lambda-C shows 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.
Published: 2005

39. 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

40. 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

41. Structure near the K- + p + p threshold in the in-flight 3He(K-, Λp)n reaction

Author: A. Romero Vidal, Shun Enomoto, Florin Sirghi, S. Ishimoto, Diana Sirghi, Haruhiko Outa, M. Iwasaki, Paul Buehler, Shinji Okada, B. K. Wuenschek, K. Itahashi, Mario Bragadireanu, Tomokazu Fukuda, Hexi Shi, Tomofumi Nagae, S. Kawasaki, K. Inoue, Y. Fujiwara, Hiroyuki Fujioka, Johann Marton, T. Yamazaki, T. Hashimoto, Masatoshi Sato, K. Piscicchia, O. Vazquez Doce, T. Ishiwatari, M. Iwai, Catalina Curceanu, Yasuhiro H. Matsuda, H. C. Bhang, Y. Kato, G. A. Beer, H. Tatsuno, Yutaka Mizoi, Q. Zhang, Akihiro Toyoda, S. Choi, Michael Cargnelli, Hiroyuki Noumi, T. Yamaga, C. Guaraldo, Ken Suzuki, J. Zmeskal, Makoto Tokuda, K. Tanida, H. Kou, Y. Sada, D. Faso, O. Morra, K. Tsukada, P. Kienle, M. Sekimoto, Atsushi Sakaguchi, M. Iliescu, E. Widmann, T. Ishikawa, S. Y. Suzuki, H. Yim, S. Ajimura, Masami Iio, L. Busso, M. Bazzi, D. Tomono, Yue Ma, Toshihiko Hiraiwa, Hiroaki Ohnishi, Ryugo S. Hayano, Y. Ishiguro, Fuminori Sakuma, Alessandro Scordo, and T. Suzuki
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Form factor (quantum field theory), General Physics and Astronomy, Dalitz plot, Order (ring theory), Lambda, Kinetic energy, 01 natural sciences, 0103 physical sciences, High Energy Physics::Experiment, Absorption (logic), Nuclear Experiment, 010306 general physics, Nucleon, Energy (signal processing)
Abstract: To search for an S= -1 di-baryonic state which decays to $\Lambda p$, the $ {\rm{}^3He}(K^-,\Lambda p)n_{missing}$ reaction was studied at 1.0 GeV/$c$. Unobserved neutrons were kinematically identified from the missing mass $M_X$ of the $ {\rm{}^3He}(K^-,\Lambda p)X$ reaction in order to have a large acceptance for the $\Lambda pn$ final state. The observed $\Lambda p n$ events, distributed widely over the kinematically allowed region of the Dalitz plot, establish that the major component comes from a three nucleon absorption process. A concentration of events at a specific neutron kinetic energy was observed in a region of low momentum transfer to the $\Lambda p$. To account for the observed peak structure, the simplest S-wave pole was assumed to exist in the reaction channel, having Breit-Wigner form in energy and with a Gaussian form-factor. A minimum $\chi^2$ method was applied to deduce its mass $M_X\ =$ 2355 $ ^{+ 6}_{ - 8}$ (stat.) $ \pm 12$ (syst.) MeV/c$^2$, and decay-width $\Gamma_X\ = $ 110 $ ^{+ 19}_{ - 17}$ (stat.) $ \pm 27$ (syst.) MeV/c$^2$, respectively. The form factor parameter $Q_X \sim$ 400 MeV/$c$ implies that the range of interaction is about 0.5
Published: 2016

42. A search for deeply bound kaonic nuclear states at J-PARC

Author: K. Itahashi, S. Y. Suzuki, Shinji Okada, Shun Enomoto, S. Ishimoto, Akihiro Toyoda, T. Yamazaki, Atsushi Sakaguchi, Fuminori Sakuma, Yasuyuki Matsuda, H. Yim, Johann Marton, Ryugo S. Hayano, Tomofumi Nagae, S. Kawasaki, H. Tatsuno, K. Piscicchia, Michael Cargnelli, Hiroyuki Fujioka, T. Ishikawa, Johann Zmeskal, Alessandro Scordo, Yutaka Mizoi, G. A. Beer, Catalina Curceanu, Hiroaki Ohnishi, S. Choi, Y. Sada, Hyoungchan Bhang, Yue Ma, Y. Ishiguro, Kyo Tsukada, Eberhard Widmann, T. Hashimoto, Tomokazu Fukuda, A. Romero Vidal, Haruhiko Outa, Y. Fujiwara, Masahiko Iwasaki, L. Busso, S. Ajimura, Masami Iio, T. Ishiwatari, Hexi Shi, T. Suzuki, Florin Sirghi, Toshihiko Hiraiwa, M. Poli Lener, Ken Suzuki, Hiroyuki Noumi, D. Tomono, Mario Bragadireanu, H. Kou, M. Iliescu, Diana Sirghi, C. Guaraldo, O. Morra, M. Sato, Paul Kienle, M. Iwai, D. Faso, K. Inoue, Paul Buehler, Michiko Sekimoto, O. Vazquez Doce, and Makoto Tokuda
Subjects: Physics, Nuclear reaction, Nuclear physics, Particle decay, Particle physics, Pion, Meson, Bound state, Invariant mass, Neutron, J-PARC, Nucleon, Atomic and Molecular Physics, and Optics
Abstract: The J-PARC E15 experiment has the aims to search for the simplest kaonic nuclear bound state, K − pp, by the in-flight 3He(K −,n) reaction. The exclusive measurement is performed by a simultaneous measurement of the missing mass using the knocked out neutron and the invariant mass via the expected decay, K − pp → Λ p → pπ− p. In this paper, an overview of the experiment and current data analysis of the engineering runs performed in February and June 2012 are presented.
Published: 2010

43. Production of Neutron-Rich Lambda Hypernuclei at J-PARC

Author: Tomonori Takahashi, K. Yoshida, Tomokazu Fukuda, Yuji Shimizu, Hyoungchan Bhang, K. Matsuoka, Tadamitsu Kishimoto, Atsushi Sakaguchi, O. Morra, K. Matsuda, Toshiyuki Takahashi, L. Busso, Yutaka Mizoi, M. Endo, Chhanda Samanta, S. Ajimura, Hiroyuki Noumi, Pranab Saha, and D. Faso
Subjects: Physics, Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Neutron-rich lambda hypernuclei, General Physics and Astronomy, FOS: Physical sciences, Lambda, Nuclear physics, Neutron, double charge-exchange reaction, J-PARC, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract: We discuss the usefulness of the double charge-exchange reactions (DCX) for the production of the neutron-rich Lambda-hypernuclei. We believe the (pi-,K+) reaction is one of the most promising DCX reactions, and propose to produce the neutron-rich Lambda-hypernuclei, 6(Lambda)H and 9(Lambda)He, at the J-PARC 50 GeV PS by the reaction (J-PARC E10 experiment). The design of the experiment is presented., Comment: 6 pages, 2 figures, 1 table, A talk given at Sendai International Symposium on Strangeness Nuclear and Hadronic Systems (SENDAI08), Dec. 15-18, 2008, Sendai, Japan
Published: 2009
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44. The COMPASS RICH-1 detector upgrade

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M. L. Colantoni, S. Costa, S. Dalla Torre, T. Dafni, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. von Harrach, F. H. Heinsius, R. Joosten, B. Ketzer, K. Königsmann, V. N. Kolosov, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, P. Pagano, S. Panebianco, D. Panzieri, S. Paul, G. Pesaro, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, Bradamante, F, Bressan, Andrea, Busso, L, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Costa, S, DALLA TORRE, S, Dafni, T, Delagnes, E, Deschamps, H, Diaz, V, Dibiase, N, Duic, V, Eyrich, W, Faso, D, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, M, Gobbo, B, Hagemann, R, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, Königsmann, K, KOLOSOV V., N, Konorov, I, Kramer, D, Kunne, F, Lehmann, A, Levorato, S, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Nerling, F, Neyret, D, Pagano, P, Panebianco, S, Panzieri, D, Paul, S, Pesaro, G, Polak, J, Rebourgeard, P, Robinet, F, Rocco, E, Schiavon, Paolo, Schill, C, Schröder, W, Silva, L, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Svec, M, Tessarotto, F, Teufel, A, and Wollny, H.
Subjects: Physics, Photomultiplier, Physics::Instrumentation and Detectors, business.industry, Cherenkov detector, Detector, General Physics and Astronomy, Ring-imaging Cherenkov detector, law.invention, Nuclear physics, Upgrade, Optics, law, Compass, COMPASS experiment, High Energy Physics::Experiment, General Materials Science, Physical and Theoretical Chemistry, business, Cherenkov radiation
Abstract: The COMPASS experiment at CERN provides hadron identification in a wide momentum range employing a large size gaseous Ring Imaging CHerenkov detector (RICH). The presence of large uncorrelated background in the COMPASS environment was limiting the efficiency of COMPASS RICH-1 in the very forward regime. A major upgrade of RICH-1 required a new technique for Cherenkov photon detection at count rates of several 106/s per channel in the central detector part, and a read-out system allowing for trigger rates of up to 100 kHz. To cope with these requirements, the photon detectors of the central region have been replaced with a fast photon detection system described here, while, in the peripheral regions, the existing multi-wire proportional chambers with CsI photo-cathodes have been equipped with a new read-out system based on APV preamplifiers and flash ADC chips. The new system consists of multi-anode photomultiplier tubes (MAPMTs) coupled to individual fused silica lens telescopes, and fast read-out electronics based on the MAD4 amplifier-discriminator and the dead-time free F1 TDC chip. The project was completely designed and implemented in less than two years: The upgraded detector is in operation since the 2006 CERN SPS run. We present the photon detection design, constructive aspects and test studies to characterise the single photon response of the MAPMTs coupled to the read-out system as well as the detector performance based on the 2006 data.
Published: 2008

45. Fast photon detection for COMPASS RICH-1

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M.L. Colantoni, S. Costa, N. Dibiase, T. Dafni, S. Dalla Torre, V. Diaz, V. Duic, E. Delagnes, H. Deschamps, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, K. Königsmann, V.N. Kolosov, I. Konorov, D. Kramer, F. Kunne, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, D. Neyret, F. Nerling, P. Pagano, S. Paul, S. Panebianco, D. Panzieri, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, E. Rocco, F. Robinet, P. Schiavon, C. Schill, P. Schoenmeier, L. Silva, M. Slunecka, L. Steiger, F. Sozzi, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, Bradamante, Franco, Bressan, Andrea, Busso, L, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Costa, S, Dibiase, N, Dafni, T, TORRE S., Dalla, Diaz, V, Duic, V, Delagnes, E, Deschamps, H, Eyrich, W, Faso, D, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, Marcello, Gobbo, B, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, Königsmann, K, KOLOSOV V., N, Konorov, I, Kramer, D, Kunne, F, Levorato, Stefano, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Neyret, D, Nerling, F, Pagano, P, Paul, S, Panebianco, S, Panzieri, D, Pesaro, G, Pizzolotto, C, Polak, J, Rebourgeard, P, Rocco, E, Robinet, F, Schiavon, Paolo, Schill, C, Schoenmeier, P, Silva, L, Slunecka, M, Steiger, L, Sozzi, F, Sulc, M, Svec, M, Tessarotto, F, Teufel, A, and Wollny, H.
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, business.industry, UV lenses, Emphasis (telecommunications), Detector, COMPASS, Photocathode, Optics, Upgrade, Photon detection, Compass, RICH, Multianode photomultiplier tubes, Systems design, Electronics, business, Instrumentation
Abstract: A fast photon detection system has been built and assembled for the upgrade of COMPASS RICH-1. The system is based on multianode photomultipliers coupled to fused silica lenses to collect the light from a larger surface and to guide it to the photocathode, preserving the position information. The emphasis is on the fast response and high rate capability of the detectors and the associated electronics. The photon detection system is now ready and it will be employed in the 2006 COMPASS data taking. We report about the system design and construction.
Published: 2007

46. The fast photon detection system of COMPASS RICH-1

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M.L. Colantoni, S. Costa, T. Dafni, S. Dalla Torre, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, V.N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, P. Pagano, S. Panebianco, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, E. Rocco, F. Robinet, P. Schiavon, C. Schill, P. Schoenmeier, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P., Alekseev, M., Angerer, H., Apollonio, M., Birsa, R., Bordalo, P., Bradamante, F., Bressan, A., Busso, L., Chiosso, M., Ciliberti, P., Colantoni, M. L., Costa, S., Dafni, T., Dalla Torre, S., Delagnes, E., Deschamps, H., Diaz, V., Dibiase, N., Duic, V., Eyrich, W., Faso, D., Ferrero, A., Finger, M., Finger Jr., M., Fischer, H., Gerassimov, S., Giorgi, M., Gobbo, B., von Harrach, D., Heinsius, F. H., Joosten, R., Ketzer, B., Kolosov, V. N., Königsmann, K., Konorov, I., Kramer, D., Kunne, F., Lehmann, A., Levorato, S., Maggiora, A., Magnon, A., Mann, A., Martin, A., Menon, G., Mutter, A., Nähle, O., Nerling, F., Neyret, D., Pagano, P., Panebianco, S., Panzieri, D., Paul, S., Pesaro, G., Pizzolotto, Cecilia, Polak, J., Rebourgeard, P., Rocco, E., Robinet, F., Schiavon, P., Schill, C., Schoenmeier, P., Schröder, W., Silva, L., Slunecka, M., Sozzi, F., Steiger, L., Sulc, M., Svec, M., Tessarotto, F., Teufel, A., Wollny, H., Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, Bradamante, F, Bressan, Andrea, Busso, L, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Costa, S, Dafni, T, DALLA TORRE, S, Delagnes, E, Deschamps, H, Diaz, V, Dibiase, N, Duic, V, Eyrich, W, Faso, D, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, M, Gobbo, B, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, KOLOSOV V., N, Königsmann, K, Konorov, I, Kramer, D, Kunne, F, Lehmann, A, Levorato, Stefano, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Nerling, F, Neyret, D, Pagano, P, Panebianco, S, Panzieri, D, Paul, S, Pesaro, G, Pizzolotto, C, Polak, J, Rebourgeard, P, Rocco, E, Robinet, F, Schiavon, Paolo, Schill, C, Schoenmeier, P, Schröder, W, Silva, L, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Svec, M, Tessarotto, F, and Teufel, A
Subjects: Photomultiplier, Nuclear and High Energy Physics, Photon, Multi-anode photomultiplier tubes, Physics::Instrumentation and Detectors, UV lenses, COMPASS, Photon detection, RICH, Instrumentation, law.invention, FAST-RICH, DEUTERON, READOUT, DESIGN, Optics, law, Multi-anode photomultiplier tube, Compass, COMPASS experiment, Nuclear and High Energy Physic, Physics, Large Hadron Collider, business.industry, Detector, Lens (optics), Upgrade, UV lense, High Energy Physics::Experiment, business
Abstract: A fast photon detection system has been built for the upgrade of COMPASS RICH-1, the large size gaseous RICH detector in use at the COMPASS Experiment at the CERN SPS since 2001. The photon detectors of the central region have been replaced by a new system based on multi-anode photomultipliers coupled to individual fused silica lens telescopes and a fast readout electronics system, while in the outer region the existing MWPCs with CsI photocathodes have been equipped with a new readout system, based on the APV chip. RICH-1 has been successfully operated in its upgraded version during the 2006 run. We report on the upgrade design and construction, and on the preliminary characterization of the upgraded RICH-1 performances: at saturation about 60 photons per ring have routinely been obtained and the background level has drastically been reduced thanks to the good time resolution of the new system, leading to a 2 σ π –K separation above 55 GeV/c.
Published: 2007

47. Study of the proton weak decay of Λ 12 Cg.s. with FINUDA

Author: M. Agnello, G. Beer, L. Benussi, M. Bertani, H. C. Bhang, S. Bianco, G. Bonomi, E. Botta, M. Bregant, T. Bressani, S. Bufalino, L. Busso, D. Calvo, P. Camerini, M. Caponero, P. Cerello, B. Dalena, F. De Mori, G. D’Erasmo, D. Di Santo, D. Elia, F. L. Fabbri, D. Faso, A. Feliciello, A. Filippi, V. Filippini, R. A. Fini, E. M. Fiore, H. Fujioka, P. Gianotti, N. Grion, O. Hartmann, A. Krasnoperov, V. Lenti, V. Lucherini, 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, R. Rui, G. Simonetti, H. So, V. Tereshchenko, S. Tomassini, A. Toyoda, R. Wheadon, and A. Zenoni
Published: 2007

48. A highly integrated low-cost readout system for the COMPASS RICH-1 detector

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M. L. Colantoni, S. Costa, T. Dafni, S. Dalla Torre, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, M. Georgi, S. Gerassimov, B. Gobbo, R. Hagemann, D. von Harrach, F. H. Heinsius, R. Joosten, B. Ketzer, V. N. Kolosov, K. Konigsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nahle, F. Nerling, D. Neyret, P. Pagano, S. Panebianco, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, W. Schroder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, and H. Wollny
Subjects: Physics, Photomultiplier, Physics::Instrumentation and Detectors, business.industry, Detector, Photodetector, Dead time, Particle identification, Nuclear physics, Optics, Compass, Nuclear electronics, COMPASS experiment, High Energy Physics::Experiment, business
Abstract: Particle identification at high multiplicities is a key feature of the COMPASS experiment at CERN's SPS. Hadrons up to 50 GeV/c are identified by a RICH detector with a large horizontal and vertical acceptance of plusmn250 mrad and plusmn180 mrad, respectively. The central region of the photon detector is equipped with multi-anode photomultiplier tubes, the remaining 75% of the total active area are covered by MWPCs with Csl photocathodes. In order to improve the performance of the detector at very high beam intensities, more than 62000 channels of a new analog readout system of the MWPCs, based on the APV25 chip, were developed and installed in 2006. The new system features good single photon detection efficiency due to its low noise, negligible dead time at trigger rates up to 50 kHz, and low cost. In addition, sampling of the MWPC signal allows us to measure the signal time with a resolution of about 30 ns or better. The architecture of the new readout system as well as the performance results of the RICH-1 detector in the outer region during 2006 COMPASS run will be discussed.
Published: 2007

49. The A(K stop − , Λd)A′ reaction, a tool to observe [ $$ \overline K $$ NNN] clusters

Author: M. Bertani, O. Hartmann, Stefania Bufalino, Alexey Krasnoperov, Sandro Tomassini, R. Fini, M. Palomba, Tullio Bressani, F. De Mori, N. Mirfakhrai, B. Dalena, Stefano Bianco, Vito Manzari, D. Elia, Richard Wheadon, A. Feliciello, Stefano Piano, F. L. Fabbri, D. Faso, G. Simonetti, V. Lenti, E. M. Fiore, Germano Bonomi, G. A. Beer, Elena Botta, D. Di Santo, H. C. Bhang, O. Morra, Tomofumi Nagae, P. Gianotti, G. D'Erasmo, Haruhiko Outa, E. Pace, Michele Arturo Caponero, V. Filippini, A. Pantaleo, Rinaldo Rui, S. Marcello, Luigi Benussi, F. Pompili, V. Tereshchenko, P. Cerello, A. Panzarasa, Paolo Camerini, H. So, Hiroyuki Fujioka, L. Busso, V. Paticchio, Aldo Zenoni, N. Grion, Tomofumi Maruta, Marco Bregant, M. Pallotta, A. Filippi, Akihiro Toyoda, D. Calvo, V. Lucherini, and Michelangelo Agnello
Subjects: Nuclear physics, Physics, Work (thermodynamics), Spectrometer, Yield (chemistry), Binding energy, Cluster (physics), Invariant mass, Nuclear Experiment
Abstract: This work presents experimental results obtained from a study of the K stop − A → ΛdA′ reaction, where A = 6Li. The study concerns the distributions of the Λd invariant mass, which allows us to determine the structure of bound [K − ppn] systems in nuclei. A candidate of such clusters is identified in the present measurement, and its mass (binding energy), decay width and yield are reported. The experiment was performed at the DAΦNE o-facility (LNF) by using the FINUDA spectrometer. The study depended on the capability of FINUDA to reconstruct the traces of all the particles involved in the decay of the nuclear cluster.
Published: 2007

50. A study of Λ 7 Li production with FINUDA

Author: Paolo Camerini, Germano Bonomi, Alexey Krasnoperov, O. Morra, Haruhiko Outa, Hiroyuki Fujioka, F. De Mori, N. Grion, Sandro Tomassini, G. A. Beer, V. Lucherini, D. Faso, Stefano Bianco, E. M. Fiore, E. Pace, Michelangelo Agnello, Richard Wheadon, R. Fini, D. Elia, M. Palomba, Tomofumi Nagae, G. D'Erasmo, O. Hartmann, H. So, F. L. Fabbri, V. Tereshchenko, Elena Botta, H. C. Bhang, P. Gianotti, Stefano Piano, G. Simonetti, D. Calvo, V. Paticchio, A. Panzarasa, A. Pantaleo, Tullio Bressani, L. Busso, N. Mirfakhrai, V. Lenti, Vito Manzari, Michele Arturo Caponero, V. Filippini, Aldo Zenoni, Tomofumi Maruta, Rinaldo Rui, S. Marcello, A. Filippi, Akihiro Toyoda, Stefania Bufalino, Luigi Benussi, P. Cerello, M. Pallotta, Marco Bregant, F. Pompili, B. Dalena, A. Feliciello, D. Di Santo, and M. Bertani
Subjects: Physics, Nuclear physics, Full width at half maximum, Meson, law, Bound state, Collider, Spectroscopy, law.invention
Abstract: The FINUDA experiment studies the production and decay of Λ-hypernuclei by stopping in thin targets the K −s coming from the decay of the Φ (1020) meson at the DAΦNE e + − e − collider at INFN Laboratori Nazionali di Frascati. In this paper we report the results concerning the production of Λ 7 Li. The absolute production rates for bound states and the best up-to-date hypernuclear spectrum obtained by means of the production π − spectroscopy, with an energy resolution of 1.1 MeV (FWHM), are unveiled.
Published: 2007

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