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229 results on '"Ghio F"'

1. Evidence of a dibaryon spectrum in coherent π0π0d photoproduction at forward deuteron angles

Author

Jude, T. C., Alef, S., Beck, R., Braghieri, A., Cole, P. L., Elsner, D., Di Salvo, R., Fantini, A., Freyermuth, O., Frommberger, F., Ghio, F., Goertz, S, Gridnev, A., Kohl, K., Kozlenko, N., Lapik, A., Sandri, P. Levi, Lisin, V., Mandaglio, G., Moricciani, D., Nedorezov, V., Novinsky, D., Pedroni, P., Polonskiy, A., Reitz, B. -E., Romaniuk, M., Scheluchin, G., Schmieden, H., Stuglev, A., Sumachev, V., and Tarakanov, V.

Subjects
Nuclear and High Energy Physics, Coherent photoproduction, Dibaryon, Settore FIS/04, BGOOD, Nuclear Experiment
Abstract

The coherent reaction, $\gamma d \rightarrow \pi^0\pi^0 d$ was studied with the BGOOD experiment at ELSA from threshold to a centre-of-mass energy of 2850\,MeV. A full kinematic reconstruction was made, with final state deuterons identified in the forward spectrometer and $\pi^0$ decays in the central BGO Rugby Ball. The strength of the differential cross section exceeds what can be described by models of coherent photoproduction and instead supports the three isoscalar dibaryon candidates reported by the ELPH collaboration at 2.38, 2.47 and 2.63\,GeV/c$^2$. A low mass enhancement in the $\pi^0\pi^0$ invariant mass is also observed at the $d^*(2380)$ centre-of-mass energy which is consistent with the ABC effect. At higher centre-of-mass energies, a narrow peak in the $\pi^0 d$ invariant mass at 2114\,MeV/c$^2$ with a width of 20\,MeV/c$^2$ supports a sequential two-dibaryon decay mechanism., Comment: 8 pages, 10 figures. Additional references (recommended by colleagues) added since the first revision

Published
2022

2. Photoproduction of Λ(1405)→ Σ Extending to Forward Angles and low Momentum Transfer

Author

Scheluchin, G., Jude, T.C., Alef, S., Bauer, P., Bayadilov, D., Beck, R., Braghieri, A., Cole, P.L., Elsner, D., Di Salvo, R., Fantini, A., Freyermuth, O., Frommberger, F., Ghio, F., Gridnev, A., Hammann, D., Hannappel, J., Kohl, K., Kozlenko, N., Lapik, A., Levi Sandri, P., Lisin, V., Mandaglio, G., Messi, R., Moricciani, D., Mushkarenkov, A., Nedorezov, V., Novinskiy, D., Pedroni, P., Polonskiy, A., Reitz, B.E., Romaniuk, M., Schmieden, H., Sumachev, V., and Tarakanov, V.

Abstract

K+Λ(1405) photoproduction has been studied at the BGOOD experiment via the all neutral decay, Λ(1405)→Σ0π0. The unique BGOOD experimental setup allows both the cross section and Λ(1405) invariant mass distribution (line shape) to be measured over a broad K+ polar angle range, extending to extreme forward K+ angles unattainable at previous experiments.Evidence is provided for the role of a triangle singularity driven by the N⁎(2030) resonance, which appears to contribute significantly to K+Λ(1405) photoproduction. This is observed in the integrated cross section which was determined with unprecedented energy resolution and supported by the angular distributions. The measured line shape is also in agreement with the previous results of CLAS and ANKE, and is consistent with two poles derived in χPT based models.

Published
2022

3. Evidence of a dibaryon spectrum in coherent $π^0π^0 d$ photoproduction at forward deuteron angles

Author

Jude, T. C., Alef, S., Beck, R., Braghieri, A., Cole, P. L., Elsner, D., Di Salvo, R., Fantini, A., Freyermuth, O., Frommberger, F., Ghio, F., Goertz, S, Gridnev, A., Kohl, K., Kozlenko, N., Lapik, A., Sandri, P. Levi, Lisin, V., Mandaglio, G., Moricciani, D., Nedorezov, V., Novinsky, D., Pedroni, P., Polonskiy, A., Reitz, B. -E., Romaniuk, M., Scheluchin, G., Schmieden, H., Stuglev, A., Sumachev, V., and Tarakanov, V.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex)
Abstract

The coherent reaction, $γd \rightarrow π^0π^0 d$ was studied with the BGOOD experiment at ELSA from threshold to a centre-of-mass energy of 2850\,MeV. A full kinematic reconstruction was made, with final state deuterons identified in the forward spectrometer and $π^0$ decays in the central BGO Rugby Ball. The strength of the differential cross section exceeds what can be described by models of coherent photoproduction and instead supports the three isoscalar dibaryon candidates reported by the ELPH collaboration at 2.38, 2.47 and 2.63\,GeV/c$^2$. A low mass enhancement in the $π^0π^0$ invariant mass is also observed at the $d^*(2380)$ centre-of-mass energy which is consistent with the ABC effect. At higher centre-of-mass energies, a narrow peak in the $π^0 d$ invariant mass at 2114\,MeV/c$^2$ with a width of 20\,MeV/c$^2$ supports a sequential two-dibaryon decay mechanism., 8 pages, 10 figures. Additional references (recommended by colleagues) added since the first revision

Published
2022
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4. Measurement of the $\gamma n\rightarrow K^0\Sigma^0$ differential cross section over the $K^*$ threshold

Author

Kohl, K., Alef, S., Beck, R., Braghieri, A., Cole, P., Salvo, R. D., Fantini, A., Freyermuth, O., Frommberger, F., Ghio, F., Goertz, S., Gridnev, A., Hammann, D., Hannappel, J., Jude, T., Kozlenko, N., Lapik, A., Sandri, P. Levi, Lisin, V., Mandaglio, G., Messi, R., Moricciani, D., Nedorezov, V., Nikonov, V. A., Novinsky, D., Pedroni, P., Polonski, A., Reitz, B. -E., Romaniuk, M., Scheluchin, G., Schmieden, H., Stuglev, A., Sumachev, V., and Tarakanov, V.

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

The differential cross section for the quasi-free photoproduction reaction $\gamma n\rightarrow K^0\Sigma^0$ was measured at BGOOD at ELSA from threshold to a center-of-mass energy of 2400 MeV. An increase in the cross section is observed at forward angles above 2000 MeV. The available statistics prevent an accurate description of this behavior, however it appears consistent with models describing a resonance of dynamically generated vector meson-baryon states, where an equivalent model predicted the $P_C$ states observed at LHCb. If proven correct, this could indicate parallels between the strange and charmed quark sectors., Comment: 6 pages, 8 figures

Published
2021

5. Photoproduction of $K^+\Lambda(1405) \rightarrow K^+\pi^0\Sigma^0$ extending to forward angles and low momentum transfer

Author

Scheluchin, G., Jude, T. C., Alef, S., Bauer, P., Bayadilov, D., Beck, R., Braghieri, A., Cole, P. L., Di Salvo, R., Elsner, D., Fantini, A., Freyermuth, O., Fromberger, F., Ghio, F., Gridnev, A., Hammann, D., Hannappel, J., Kohl, K., Kozlenko, N., Lapik, A., Sandri, P. Levi, Lisin, V., Mandaglio, G., Messi, R., Moricciani, D., Mushkarenkov, A., Nedorezov, V., Novinsky, D., Pedroni, P., Polonski, A., Reitz, B. -E., Romaniuk, M., Schmieden, H., Sumachev, V., and Tarakanov, V.

Subjects
Nuclear Experiment
Abstract

$K^+\Lambda(1405)$ photoproduction has been studied at the BGOOD experiment via the all neutral decay, $\Lambda(1405)\rightarrow\Sigma^0\pi^0$. The unique BGOOD experimental setup allows both the cross section and $\Lambda(1405)$ invariant mass distribution (line shape) to be measured over a broad $K^+$ polar angle range, extending to extreme forward $K^+$ angles unattainable at previous experiments. Evidence is provided for the role of a triangle singularity driven by the $N^*(2030)$ resonance, which appears to contribute significantly to $K^+\Lambda(1405)$ photoproduction. This is observed in both the angular distributions and the integrated cross section which was determined with unprecedented energy resolution. The measured line shape is also in agreement with the previous results of CLAS and ANKE, and is consistent with two poles derived in $\chi$PT based models.

Published
2021

6. Observation of a cusp-like structure in the → Σ Cross Section at Forward Angles and low Momentum Transfer

Author

Jude, T.C., Alef, S., Bauer, P., Bayadilov, D., Beck, R., Bella, A., Bieling, J., Braghieri, A., Cole, P.L., Elsner, D., Di Salvo, R., Fantini, A., Freyermuth, O., Frommberger, F., Ghio, F., Goertz, S., Gridnev, A., Hammann, D., Hannappel, J., Kohl, K., Kozlenko, N., Lapik, A., Levi Sandri, P., Lisin, V., Mandaglio, G., Messi, F., Messi, R., Moricciani, D., Nedorezov, V., Nikonov, V.A., Novinskiy, D., Pedroni, P., Polonskiy, A., Reitz, B.E., Romaniuk, M., Sarantsev, A.V., Scheluchin, G., Schmieden, H., Stuglev, A., Sumachev, V., Vegna, V., Tarakanov, V., and Zimmermann, T.

Abstract

The γp→K+Σ0 differential cross section at extremely forward angles was measured at the BGOOD experiment. A three-quarter drop in strength over a narrow range in energy and a strong dependence on the polar angle of the K+ in the centre-of-mass of the reaction is observed at a centre-of-mass energy of 1900 MeV. Residing close to multiple open and hidden strangeness thresholds, the structure appears consistent with meson-baryon threshold effects which may contribute to the reaction mechanism.

Published
2021

7. Measurement of the $��n\rightarrow K^0��^0$ differential cross section over the $K^*$ threshold

Author

Kohl, K., Alef, S., Beck, R., Braghieri, A., Cole, P., Salvo, R. D., Fantini, A., Freyermuth, O., Frommberger, F., Ghio, F., Goertz, S., Gridnev, A., Hammann, D., Hannappel, J., Jude, T., Kozlenko, N., Lapik, A., Sandri, P. Levi, Lisin, V., Mandaglio, G., Messi, R., Moricciani, D., Nedorezov, V., Nikonov, V. A., Novinsky, D., Pedroni, P., Polonski, A., Reitz, B. -E., Romaniuk, M., Scheluchin, G., Schmieden, H., Stuglev, A., Sumachev, V., and Tarakanov, V.

Subjects
High Energy Physics::Phenomenology, Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The differential cross section for the quasi-free photoproduction reaction $��n\rightarrow K^0��^0$ was measured at BGOOD at ELSA from threshold to a center-of-mass energy of 2400 MeV. An increase in the cross section is observed at forward angles above 2000 MeV. The available statistics prevent an accurate description of this behavior, however it appears consistent with models describing a resonance of dynamically generated vector meson-baryon states, where an equivalent model predicted the $P_C$ states observed at LHCb. If proven correct, this could indicate parallels between the strange and charmed quark sectors., 6 pages, 8 figures

Published
2021
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8. Status and development of the TOP-IMPLART Project

Author

Picardi, L., Ampollini, A., Anello, P., Balduzzi, M., Bazzano, G., Borgognoni, F., Cisbani, E., DAndrea, M., De Angelis, C., De Angelis, G., Della Monaca, S., Esposito, G., Ghio, F., Giuliani, F., Lucentini, M., Marino, C., Montereali, R. M., Nenzi, P., Notaro, C., Patrono, C., Placido, C., Piccinini, M., Ronsivalle, C., Santavenere, F., Spurio, A., Strigari, L., Surrenti, V., Tabocchini, A., Trinca, E., and Vadrucci, M.

Subjects
FOS: Physical sciences, Medical Physics (physics.med-ph), Applied Physics (physics.app-ph), Physics - Applied Physics, Physics - Medical Physics
Abstract

The TOP-IMPLART project consists of the design and implementation of a linear proton accelerator, its control and monitoring systems for the treatment of superficial and semi-deep tumors. The energy of 150 MeV (corresponding to a penetration in tissue of about 15 cm) is a milestone in design being useful for the proton therapy treatment of almost 50% of tumors based on their position and depth (including ocular melanoma, head-neck tumors, pediatric tumors, and more superficial tumors). The capability to vary the intensity on a pulse-to-pulse basis combined with an electronic feedback system allows to get the required dose uniformity (2.5%) reducing the number of re-paintings. In this paper the state of the art and the objectives of the TOP-IMPLART project are described within the framework of the progress of Protontherapy.

Published
2020

9. Observation of a cusp-like structure in the $\gamma p \rightarrow K^+\Sigma^0$ cross section at forward angles and low momentum transfer

Author

Jude, T. C., Alef, S., Bauer, P., Bayadilov, D., Beck, R., Bella, A., Bieling, J., Braghieri, A., Cole, P. L., Elsner, D., Di Salvo, R., Fantini, A., Freyermuth, O., Frommberger, F., Ghio, F., Goertz, S., Gridnev, A., Hammann, D., Hannappel, J., Kohl, K., Kozlenko, N., Sandri, A. Lapik P. Levi, Lisin, V., Mandaglio, G., Messi, F., Messi, R., Moricciani, D., Nedorezov, V., Nikonov, V. A, Novinskiy, D., Pedroni, P., Polonskiy, A., Reitz, B. -E., Romaniuk, M., Sarantsev, A. V, Scheluchin, G., Schmieden, H., Stugelev, A., Sumachev, V., Vegna, V., Tarakanov, V., and Zimmermann, T.

Subjects
Nuclear Experiment
Abstract

The $\gamma p \rightarrow K^+\Sigma^0$ differential cross section at extremely forward angles was measured at the BGOOD experiment. A three-quarter drop in strength over a narrow range in energy and a strong dependence on the polar angle of the $K^+$ in the centre-of-mass of the reaction is observed at a centre-of-mass energy of 1900\,MeV. Residing close to multiple open and hidden strangeness thresholds, the structure appears consistent with meson-baryon threshold effects which may contribute to the reaction mechanism., Comment: 9 pages (including a 2 page appendix of tabulated data), 10 figures

Published
2020

10. Kaonic Deuterium Measurement with SIDDHARTA-2 on DA\Phi NE

Author

Curceanu, C., Amirkhani, A., Baniahmad, A., Bazzi, M., Bosnar, D., Bragadireanu, M., Carminati, M., Cargnelli, M., Clozza, A., De Paolis, L., Del Grande, R., Fabbietti, L., Fiorini, C., Ghio, F., Guaraldo, C., Iliescu, M., Iwasaki, M., Levi Sandri, P., Marton, J., Miliucci, M. Moskal, P., Niedźwiecki, S., Okada, S., Pietreanu, D., Piscicchia, K., Scordo, A., Shi, H., Silarski, M., Sirghi, D. L., Sirghi, F., Skurzok, M., Spallone, A., Tatsuno, H., Tüchler, M., Vazquez Doce, O., Widmann, E., and Zmeskal, J.

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

The interaction of antikaons with nucleons and nuclei in the low-energy regime represents an active research field in hadron physics with still many important open questions. The investigation of light kaonic atoms is, in this context, a unique tool to obtain precise information on this interaction. The most precise kaonic hydrogen measurement to date, together with an exploratory measurement of kaonic deuterium, were carried out by the SIDDHARTA Collaboration at the DAΦNE electron– positron collider of LNF-INFN, by combining the excellent quality kaon beam delivered by the collider with new experimental techniques, as fast and precise Silicon-Drift X-ray detectors. The measurement of kaonic deuterium will be realized in the near future by SIDDHARTA-2, a major upgrade of SIDDHARTA.

Published
2020

11. Kaonic Deuterium Precision Measurement at DA(formula presented)NE: The SIDDHARTA-2 Experiment

Author

Miliucci, M., Amirkhani, A., Baniahmad, A., Bazzi, M., Bellotti, G., Berucci, C., Bosnar, D., Bragadireanu, M., Cargnelli, M., Curceanu, C., Dawood Butt, A., De Paolis, L., Del Grande, R., Fabbietti, L., Fiorini, C., Ghio, F., Guaraldo, C., Iliescu, M., Iwasaki, M., Levi Sandri, P., Marton, J., Moskal, P., Niedzwiecki, S., Okada, S., Pietreanu, D., Piscicchia, K., Scordo, A., Shi, H., Silarski, M., Sirghi, D., Sirghi, F., Skurzok, M., Spallone, A., Tatsuno, H., Vazquez Doce, O., Widmann, E., and Zmeskal, J.

Published
2020

12. $K^+��$ photoproduction at forward angles and low momentum transfer

Author

Alef, S., Bauer, P., Bayadilov, D., Beck, R., Bella, A., Bieling, J., Braghieri, A., Cole, P. L., Elsner, D., Di Salvo, R., Fantini, A., Freyermuth, O., Frommberger, F., Ghio, F., Goertz, S., Gridnev, A., Hammann, D., Hannappel, J., Jude, T. C., Kohl, K., Kozlenko, N., Sandri, A. Lapik P. Levi, Lisin, V., Mandaglio, G., Messi, F., Messi, R., Moricciani, D., Nedorezov, V., Nikonov, V. A, Novinskiy, D., Pedroni, P., Polonskiy, A., Reitz, B. -E., Romaniuk, M., Sarantsev, A. V, Scheluchin, G., Schmieden, H., Stuglev, A., Sumachev, V., Vegna, V., Tarakanov, V., and Zimmermann, T.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

$��p \rightarrow K^+ ��$ differential cross sections and recoil polarisation data from threshold for extremely forward angles are presented. The measurements were performed at the BGOOD experiment at ELSA, utilising the high angular and momentum resolution forward spectrometer for charged particle identification. The data discriminates between conflicting results in the world data set and enable extraction of the cross section as the minimum momentum transfer to the recoiling hyperon is approached., 12 pages (including a 2 page appendix), 14 figures

Published
2020
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13. Observation of a cusp-like structure in the $��p \rightarrow K^+��^0$ cross section at forward angles and low momentum transfer

Author

Jude, T. C., Alef, S., Bauer, P., Bayadilov, D., Beck, R., Bella, A., Bieling, J., Braghieri, A., Cole, P. L., Elsner, D., Di Salvo, R., Fantini, A., Freyermuth, O., Frommberger, F., Ghio, F., Goertz, S., Gridnev, A., Hammann, D., Hannappel, J., Kohl, K., Kozlenko, N., Sandri, A. Lapik P. Levi, Lisin, V., Mandaglio, G., Messi, F., Messi, R., Moricciani, D., Nedorezov, V., Nikonov, V. A, Novinskiy, D., Pedroni, P., Polonskiy, A., Reitz, B. -E., Romaniuk, M., Sarantsev, A. V, Scheluchin, G., Schmieden, H., Stugelev, A., Sumachev, V., Vegna, V., Tarakanov, V., and Zimmermann, T.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The $��p \rightarrow K^+��^0$ differential cross section at extremely forward angles was measured at the BGOOD experiment. A three-quarter drop in strength over a narrow range in energy and a strong dependence on the polar angle of the $K^+$ in the centre-of-mass of the reaction is observed at a centre-of-mass energy of 1900\,MeV. Residing close to multiple open and hidden strangeness thresholds, the structure appears consistent with meson-baryon threshold effects which may contribute to the reaction mechanism., 9 pages (including a 2 page appendix of tabulated data), 10 figures

Published
2020
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14. Low-Energy K(formula presented) Nucleon/Multi-nucleon Interaction Studies by AMADEUS

Author

Skurzok, M., Bazzi, M., Belotti, G., Bragadireanu, A., Bosnar, D., Butt, A., Cargnelli, M., Curceanu, C., Paolis, L., Grande, R. D., Fabbietti, L., Fiorini, C., Ghio, F., Guaraldo, C., Hayano, R., Iliescu, M., Iwasaki, M., Sandri, P. L., Marton, J., Miliucci, M., Moskal, P., Okada, S., Pietreanu, D., Piscicchia, K., Ramos, A., Scordo, A., Shi, H., Silarski, M., Sirghi, D. L., Sirghi, F., Spallone, A., Doce, O. V., Widmann, E., Wycech, S., and Zmeskal, J.

Published
2020

15. Studies of K2̆212-nuclei interactions at low-energies by AMADEUS

Author

Del Grande, R., Bazzi, M., Bragadireanu, A. M., Bosnar, D., Cargnelli, M., Clozza, A., Curceanu, C., De Paolis, L., Fabbietti, L., Ghio, F., Guaraldo, C., Iliescu, M., Iwasaki, M., Levi Sandri, P., Marton, J., Miliucci, M., Moskal, P., Okada, S., Piscicchia, K., Ramos, A., Scordo, A., Silarski, M., Sirghi, D. L., Sirghi, F., Skurzok, M., Spallone, A., Vazquez Doce, O., Widmann, E., Wycech, S., and Zmeskal, J.

Subjects
Paper, ddc
Published
2019

16. Studies of low-energy K2̆212 hadronic interactions with light nuclei by AMADEUS

Author

Del Grande, R, Bazzi, M, Bragadireanu, A M, Bosnar, D, Cargnelli, M, Clozza, A, Curceanu, C, De Paolis, L, Fabbietti, L, Ghio, F, Guaraldo, C, Iliescu, M, Iwasaki, M, Levi Sandri, P, Marton, J, Miliucci, M, Moskal, P, Okada, S, Piscicchia, K, Ramos, A, Scordo, A, Silarski, M, Sirghi, D L, Sirghi, F, Skurzok, M, Spallone, A, Vazquez Doce, O, Widmann, E, Wycech, S, and Zmeskal, J

Subjects
Paper, ddc
Published
2019

17. Measurements of the strong-interaction widths of the kaonic 3He and 4He 2p levels

Author

The SIDDHARTA Collaboration, Bazzi, M., Beer, G., Bombelli, L., Bragadireanu, A. M., Cargnelli, M., Curceanu, C., d'Uffizi, A., Fiorini, C., Frizzi, T., Ghio, F., Guaraldo, C., Hayano, R. S., Iliescu, M., Ishiwatari, T., Iwasaki, M., Kienle, P., Sandri, P. Levi, Longoni, A., Marton, J., Okada, S., Pietreanu, D., Ponta, T., Rizzo, A., Vidal, A. Romero, Sbardella, E., Scordo, A., Shi, H., Sirghi, D. L., Sirghi, F., Tatsuno, H., Tudorache, A., Tudorache, V., Doce, O. Vazquez, Wunschek, B., Widmann, E., and Zmeskal, J.

Subjects
Physics, Nuclear and High Energy Physics, X-ray spectroscopy, sezele, 010308 nuclear & particles physics, Strong interaction, Low-energy QCD, FOS: Physical sciences, Kaonic atoms, Antikaon–nucleon physics, 01 natural sciences, Article, Nuclear physics, 0103 physical sciences, Nuclear Experiment (nucl-ex), Atomic physics, 010306 general physics, Nuclear Experiment, Value (mathematics)
Abstract

The kaonic 3He and 4He X-rays emitted in the 3d-2p transitions were measured in the SIDDHARTA experiment. The widths of the kaonic 3He and 4He 2p states were determined to be Gamma_2p(3He) = 6 \pm 6 (stat.) \pm 7 (syst.) eV, and Gamma_2p(4He) = 14 \pm 8 (stat.) \pm 5 (syst.) eV, respectively. Both results are consistent with the theoretical predictions. The width of kaonic 4He is much smaller than the value of 55 \pm 34 eV determined by the experiments performed in the 70's and 80's, while the width of kaonic 3He was determined for the first time., Comment: Accepted in Phys. Lett. B

Published
2012
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18. Measurement of beam-recoil observables Ox , Oz and target asymmetry T for the reaction $ \gamma$ p → K+ $ \Lambda$

Author

Lleres, A., Bartalini, O., Bellini, V., Bocquet, J.P., Calvat, P., Capogni, M., Casano, L., Castoldi, M., D'Angelo, A., Didelez, J.-P., Di Salvo, R., Fantini, A., Franco, D., Gaulard, C., Gervino, G., Ghio, F., Girolami, B., Giusa, A., Guidal, M., Hourany, E., Kunne, R., Kuznetsov, Andrei, Lapik, A., Levi Sandri, P., Mammoliti, F., Mandaglio, G., Moricciani, D., Mushkarenkov, A.N., Nedorezov, V., Nicoletti, L., Perrin, C., Randieri, C., Rebreyend, D., Renard, F., Rudnev, N., Russew, T., Russo, G., Schaerf, C., Sperduto, M.-L., Sutera, M.-C., Turinge, A., Vegna, V., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and GRAAL

Subjects
Nuclear and High Energy Physics, ENERGIES, media_common.quotation_subject, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], PROTON, K+, Lambda, 01 natural sciences, Asymmetry, Settore FIS/04 - Fisica Nucleare e Subnucleare, Nuclear physics, Recoil, 0103 physical sciences, SIGMA(0), Nuclear Experiment, 010306 general physics, media_common, Physics, 010308 nuclear & particles physics, Linear polarization, Observable, Polarization (waves), LAMBDA, BARYON RESONANCES, PHOTOPRODUCTION, Isobar, HYPERON, Physics::Accelerator Physics
Abstract

The double polarization (beam-recoil) observables Ox and Oz have been measured for the reaction gamma p -> K Lambda from threshold production to Egamma = 1500 MeV. The data were obtained with the linearly polarized beam of the GRAAL facility. Values for the target asymmetry T could also be extracted despite the use of an unpolarized target. Analyses of our results by two isobar models tend to confirm the necessity to include new or poorly known resonances in the 1900 MeV mass region., Comment: 19 pages, 15 figures, 3 tables

Published
2009
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20. First measurement of the Σ beam asymmetry in (Formula presented.) photoproduction off the proton near threshold

Author

Levi Sandri, P, Mandaglio, G, De Leo, V, Bartalini, O, Bellini, V, Bocquet, J, Capogni, M, Curciarello, F, Didelez, J, D'Angelo, A, Di Salvo, R, Fantini, A, Franco, D, Gervino, G, Ghio, F, Girolami, B, Giusa, A, Lapik, A, Lleres, A, Mammoliti, F, Manganaro, M, Moricciani, D, Mushkarenkov, A, Nedorezov, V, Randieri, C, Rebreyend, D, Rudnev, N, Russo, G, Schaerf, C, Sperduto, M, Sutera, M, Turinge, A, Vegna, V, and Zonta, I

Subjects
BARYONS, PHOTON, PARTIAL-WAVE ANALYSIS, PSEUDOSCALAR-MESON PHOTOPRODUCTION, PION-PHOTOPRODUCTION, SPIN OBSERVABLES, NUCLEON, ELECTROPRODUCTION, BACKSCATTERING, RESONANCES, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2015

21. First Measurement of the $\Sigma$ Beam Asymmetry in $\eta^{\prime}$ Photoproduction off the Proton near Threshold

Author

Sandri, P. Levi, Mandaglio, G., De Leo, V., Bartalini, O., Bellini, V., Bocquet, J. P., Capogni, M., Curciarello, F., D'Angelo, A., Didelez, J. P., Di Salvo, R., Fantini, A., Franco, D., Gaulard, C., Gervino, G., Ghio, F., Giardina, G., Girolami, B., Giusa, A., Lapik, A., Lleres, A., Mammoliti, F., Manganaro, M., Moricciani, D., Mushkarenkov, A., Nedorezov, V., Randieri, C., Rebreyend, D., Rudnev, N., Russo, G., Schaerf, C., Sperduto, M. L., Sutera, M. C., Turinge, A., Vegna, V., Zonta, I., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and GRAAL

Subjects
Particle physics, Nuclear and High Energy Physics, Photon, Proton, Meson, media_common.quotation_subject, Hadron, Elementary particle, PION-PHOTOPRODUCTION, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Asymmetry, Nuclear physics, 0103 physical sciences, PSEUDOSCALAR-MESON PHOTOPRODUCTION, PARTIAL-WAVE ANALYSIS, SPIN OBSERVABLES, PHOTON, NUCLEON, ELECTROPRODUCTION, BACKSCATTERING, RESONANCES, BARYONS, 010306 general physics, Nuclear Experiment, media_common, Physics, 010308 nuclear & particles physics, Meson Photoproduction, High Energy Physics::Experiment, Nucleon, Beam (structure)
Abstract

The $\Sigma$ beam asymmetry in $\eta^{\prime}$ photoproduction off the proton was measured at the GrAAL polarised photon beam with incoming photon energies of 1.461 and 1.480 GeV. For both energies the asymmetry as a function of the meson production angle shows a clear structure, more pronounced at the lowest one, with a change of sign around 90$^o$. The observed behaviour is compatible with P-wave D-wave (or S-wave F-wave) interference, the closer to threshold the stronger. The results are compared to the existing state-of-the-art calculations that fail to account for the data., Comment: 6 pages, 4 figures, accepted for publication on Eur. Phys. J A

Published
2015
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22. Measurement of the Σ beam asymmetry for the ω photoproduction off the proton and the neutron at the GRAAL experiment

Author

Vegna, V, D'Angelo, A, Bartalini, O, Bellini, V, Bocquet, J, Capogni, M, Casano, L, Castoldi, M, Curciarello, F, De Leo, V, Didelez, J, Di Salvo, R, Fantini, A, Franco, D, Gervino, G, Ghio, F, Giardina, G, Girolami, B, Giusa, A, Lapik, A, Levi Sandri, P, Lleres, A, Mammoliti, F, Mandaglio, G, Manganaro, M, Moricciani, D, Mushkarenkov, A, Nedorezov, V, Randieri, C, Rebreyend, D, Rudnev, N, Russo, G, Schaerf, C, Sperduto, M, Sutera, M, Turinge, A, and Zonta, I

Subjects
MONITORING-SYSTEM, BARYONS, CHROMODYNAMICS, VECTOR-MESON PHOTOPRODUCTION, QUARK-MODEL, BGO CALORIMETER, POLARIZED PHOTONS, RESONANCES, COUPLINGS, THRESHOLD, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2015

23. Evidence for narrow resonant structures at $W \approx 1.68$ and $W \approx 1.72$ GeV in real Compton scattering off the proton

Author

Kuznetsov, V., Mammoliti, F., Bellini, V., Gervino, G., Ghio, F., Giardina, G., Kim, W., Mandaglio, G., Sperduto, M. L., and Sutera, C.

Subjects
High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, High Energy Physics - Experiment
Abstract

First measurement of the beam asymmetry $\Sigma$ for Compton scattering off the proton in the energy range $E_{\gamma}=0.85 - 1.25$ GeV is presented. The data reveals two narrow structures at $E_{\gamma}= 1.036$ and $E_{\gamma}=1.119$ GeV. They may signal narrow resonances with masses near $1.68$ and $1.72$ GeV, or they may be generated by the sub-threshold $K\Lambda$ and $\omega p$ production. Their decisive identification requires additional theoretical and experimental efforts., Comment: Published version

Published
2015

24. Measurement of the Sigma beam asymmetry for the omega photoproduction off the proton and the neutron at the GRAAL experiment

Author

Vegna, V., Bartalini, O, Bellini, V, Bocquet, J. P, Capogni, M, Casano, L. E, Castoldi, M, Curciarello, F, De Leo, V, Didelez, J. P, Di Salvo, R, Fantini, A, Franco, D, Gervino, Gianpiero, Ghio, F, Giardina, G, Girolami, B, Giusa, A, Lapik, A, Levi Sandri, P, Lleres, A, Mammoliti, F, Mandaglio, G, Manganaro, M, Moricciani, D, Mushkarenkov, A, Nedorezov, V, Randieri, C, Rebreyend, D, Rudnev, N, Russo, G, Schaerf, C, Sperduto, M. L, Sutera, M. C, Turinge, A, and Zonta, I.

Subjects
MONITORING-SYSTEM, BARYONS, CHROMODYNAMICS, VECTOR-MESON PHOTOPRODUCTION, QUARK-MODEL, BGO CALORIMETER, POLARIZED PHOTONS, RESONANCES, COUPLINGS, THRESHOLD
Published
2015

25. Measurement of theΣbeam asymmetry for theωphotoproduction off the proton and the neutron at the GRAAL experiment

Author

Vegna, V., D'Angelo, A., Bartalini, O., Bellini, V., Bocquet, J. P., Capogni, M., Casano, L. E., Castoldi, M., Curciarello, Francesca, De Leo, V., Didelez, J. P., Di Salvo, R., Fantini, A., Franco, D., Gervino, G., Ghio, F., Giardina, Giorgio 42, Girolami, B., Giusa, A., Lapik, A., Levi Sandri, P., Lleres, A., Mammoliti, F., Mandaglio, Giuseppe, Manganaro, M., Moricciani, D., Mushkarenkov, A., Nedorezov, V., Randieri, C., Rebreyend, D., Rudnev, N., Russo, G., Schaerf, C., Sperduto, M. L., Sutera, M. C., Turinge, A., and Zonta, I.

Published
2015

29. Measurement of the Sigma beam asymmetry for the omega photoproduction off the proton and the neutron at the GRAAL experiment

Author

Vegna, V, D'Angelo, A, Bartalini, O, Bellini, Vincenzo, Bocquet, Jp, Capogni, M, Casano, Le, Castoldi, M, Curciarello, F, De Leo, V, Didelez, Jp, Di Salvo, R, Fantini, A, Franco, D, Gervino, G, Ghio, F, Giardina, G, Girolami, B, Giusa, A, Lapik, A, Sandri, Pl, Lleres, A, Mammoliti, F, Mandaglio, G, Manganaro, M, Moricciani, D, Mushkarenkov, A, Nedorezov, V, Randieri, C, Rebreyend, D, Rudnev, N, Russo, Giuseppe, Schaerf, C, Sperduto, Ml, Sutera, CONCETTA MARIA, Turinge, A, and Zonta, I.

Subjects
Nuclear Theory, Physics::Accelerator Physics, GRAAL, meson photoproduction, beam asimmetry, omega, High Energy Physics::Experiment, Nuclear Experiment
Abstract

We report on new measurements of the beam asymmetry foromega photoproduction on protons and neutrons in hydrogen and deuterium targets from the GRAAL Collaboration. The beam asymmetry values are extracted from the reaction threshold (E-gamma = 1.1 GeV in the free nucleon kinematics) up to 1.5 GeV of incoming photon energy. For the first time both the radiative and the three-pion decay channels are simultaneously investigated on the free proton. Results from the two decay channels are in agreement, leading to the world's most precise measurements of the beam asymmetry for omega photoproduction off free protons. First experimental results on the deuteron allow the extraction of the Sigma beam asymmetry on quasifree nucleons. The beam asymmetry angular distributions obtained for the free and the quasifree kinematics show the same behavior, similar to the findings in pseudoscalar meson photoproduction reactions. First results of the beam asymmetry on the quasifree neutrons are presented, showing different strengths and angular distributions from the results on the proton target.

Published
2015
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30. Low-energy kaon-nucleon/nuclei interaction studies at DAΦNE by AMADEUS

Author

Tucaković, I., Bazzi, M., Berucci, C., Bosnar, D., Bragadireanu, A. M., Cargnelli, M., Clozza, A., Curceanu, C., D'Uffizi, A., Fabbietti, L., Fiorini, CARLO ETTORE, Ghio, F., Guaraldo, C., Iliescu, M., Ishiwatari, T., Levi Sandri, P., Marton, J., Ietreanu, D., Piscicchia, K., Poli Lener, M., Quaglia, Riccardo, Sbardella, E., Scordo, A., Shi, H., Sirghi, D. L., Sirghi, F., Tatsuno, H., Doce, O., Vazquez, Widmann, E., and Zmeskal, J.

Subjects
Particle physics, QC1-999, Hadron, Nuclear Theory, Physics and Astronomy (all), sezele, Strangeness, 01 natural sciences, law.invention, Nuclear physics, Physics and Astronomy (all), Low energy, law, 0103 physical sciences, Cluster (physics), 010306 general physics, Collider, Nuclear Experiment, Physics, Quantum chromodynamics, sezele, 010308 nuclear & particles physics, kaon-nuclei hadronic interaction, non-perturbative QCD, kaonic clusters, Interaction studies, High Energy Physics::Experiment, Nucleon
Abstract

The AMADEUS experiment deals with the investigation of the low-energy kaon-nuclei hadronic interaction at the DAΦNE collider at LNF-INFN, fundamental to respond to longstanding open questions in the non-perturbative QCD in the strangeness sector. One of the most interesting aspects is to understand how hadron masses and interactions change in the nuclear environment. The antikaon-nucleon potential is investigated searching for signals from possible bound kaonic clusters, which would imply a strongly attractive antikaon-nucleon potential. AMADEUS step 0 consists in the analysis of 2004/2005 KLOE data, exploring K − absorptions in H , 4 He , 9 Be and 12 C present in setup materials. The status of the various preliminary analyses is presented, together with future perspectives.

Published
2015

31. BEAM ASYMMETRY IN MESON PHOTOPRODUCTION ON DEUTERON TARGETS AT GRAAL

Author

DI SALVO, R., Bartalini, O., Bellini, Vincenzo, Bocquet, J. P., Castoldi, M., D'Angelo, A., Didelez, J. P., Fantini, A., Gervino, G., Ghio, F., Girolami, B., Giusa, A., Guidal, M., Hourany, E., Kunne, R., Kuznetsov, V., Lapik, A., LEVI SANDRI, P., Lleres, A., Moricciani, D., Moushkarenko, A., Nedorezov, D. V., Rebreyend, D., Rudnev, N. V., Russo, Giuseppe, Schaerf, C., Sperduto, M. L., Sutera, CONCETTA MARIA, Turinge, A., and Zabrodin, A.

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Proton, Meson, media_common.quotation_subject, Astronomy and Astrophysics, Asymmetry, Atomic and Molecular Physics, and Optics, Nuclear physics, Deuterium, Neutron, Beam (structure), media_common
Abstract

Preliminary results on the beam asymmetry Σ for η and π0 photoproduction on the proton and the neutron in the deuteron in a quasi free kinematics regime have been obtained. Very preliminary results will be presented on the status of art of the GRAAL search for the two members of the exotic penta-quarks anti-decuplet, the P11 and the Θ+.

Published
2005
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32. 2012 pandemic flu

Author

Ghio, F E, Serini, C, Ghislanzoni, L, Calini, A, Monti, G, Pappalardo, F, Ponti, A, Ghio, F E, Serini, C, Ghislanzoni, L, Calini, A, Monti, G, Pappalardo, F, and Ponti, A

Published
2012

33. Sudden cardiac arrest in a marathon runner. A case report

Author

Ghio, F E, Pieri, M, Agracheva, A, Melisurgo, G, Ponti, A, and Serini, C

Subjects
refractory cardiac arrest, cardiovascular system, Case-Report, ECLS
Abstract

Sudden cardiac death is a rare condition resulting from undetected cardiac abnormalities in athletes and non-athletes. Participant screening, immediate and advanced medical management can probably reduce mortality and ameliorate outcomes. In recent years, extracorporeal membrane oxygenation has emerged as a valuable therapeutic option in patients experiencing refractory cardiac arrest as a bridge to different types of outcome, including recovery, heart transplantation or ventricular assist device and organ donations. In this report we describe a case of a sudden cardiac arrest in a marathon runner treated with extracorporeal membrane oxygenation.

Published
2012

34. Strangeness in the Universe? Advances and perspectives in the low-energy kaon-nucleon/nuclei interaction studies at the DA${\Phi}$NE collider

Author

Curceanu, C., Bazzi, M., Ghio, F., Guaraldo, C., Hayano, R. S., Iliescu, M., Ishiwatari, T., Iwasaki, M., Levi Sandri, P., Marton, J., Okada, S., Pietreanu, D., Beer, G., Piscicchia, K., Poli Lener, M., Ponta, T., Quaglia, R., Romero Vidal, A., Sbardella, E., Schembari, F., Scordo, A., Shi, H., Sirghi, D. L., Berucci, C., Tatsuno, H., Tucakovic, I., Vazquez Doce, O., Widmann, E., Zmeskal, J., Bosnar, D., Bragadireanu, A. M., Cargnelli, M., d'Uffizi, A., Fabietti, L., and Fiorini, C.

Subjects
electron positron, Lambda(1405), Physics, atom, Nuclear Theory, formation, interaction [nucleus], K nucleon, beam [K], Frascati Stor, strangeness, nuclear physics, quality, low [energy], Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Contribution to Proceedings, Proc. of PANIC 2014, 269 - 272; DESY-PROC-2014-02; ISSN 1435-8077

Published
2014
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35. Beam asymmetry sigma in etaI photoproduction off the proton at the GRAAL experiment

Author

Mandaglio, G., Bellini, Vincenzo, Bocquet, J. P., Capogni, M., Curciarello, F., D’Angelo, A., Deleo, V., Didelez, J. P., Di Salvo, R., Fantini, A., Franco, D., Gervino, G., Ghio, F., Giardina, G., Girolami, B., Lapik, A. M., Levi Sandri, P., Lleres, A., Mammoliti, Francesco, Manganaro, M., Moricciani, D., Mushkarenkov, A. N., Nedorezov, V. G., Rebreyend, D., Rudnev, N. V., Schaerf, C., Sperduto, M. L., Sutera, M. C., Turinge, A., Vegna, V., and Zonta, I.

Published
2014

36. First Measurement of the $��$ Beam Asymmetry in $��^{\prime}$ Photoproduction off the Proton near Threshold

Author

Sandri, P. Levi, Mandaglio, G., De Leo, V., Bartalini, O., Bellini, V., Bocquet, J. P., Capogni, M., Curciarello, F., D'Angelo, A., Didelez, J. P., Di Salvo, R., Fantini, A., Franco, D., Gaulard, C., Gervino, G., Ghio, F., Giardina, G., Girolami, B., Giusa, A., Lapik, A., Lleres, A., Mammoliti, F., Manganaro, M., Moricciani, D., Mushkarenkov, A., Nedorezov, V., Randieri, C., Rebreyend, D., Rudnev, N., Russo, G., Schaerf, C., Sperduto, M. L., Sutera, M. C., Turinge, A., Vegna, V., and Zonta, I.

Subjects
FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The $��$ beam asymmetry in $��^{\prime}$ photoproduction off the proton was measured at the GrAAL polarised photon beam with incoming photon energies of 1.461 and 1.480 GeV. For both energies the asymmetry as a function of the meson production angle shows a clear structure, more pronounced at the lowest one, with a change of sign around 90$^o$. The observed behaviour is compatible with P-wave D-wave (or S-wave F-wave) interference, the closer to threshold the stronger. The results are compared to the existing state-of-the-art calculations that fail to account for the data., 6 pages, 4 figures, accepted for publication on Eur. Phys. J A

Published
2014
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37. Investigation of the low energy kaons hadronic interactions in light nuclei by AMADEUS

Author

Piscicchia K., Bazzi M., Berucci C., Bosnar D., Bragadireanu A.M., Cargnelli M., Clozza A., D’Uffizi A., Fabietti L., Fiorini C., Ghio F., Guaraldo C., Iliescu M., Ishiwatari T., Levi Sandri P., Marton J., Pietreanu D., Poli Lener M., Quaglia R., Sbardella E., Scordo A., Shi H., Sirghi D.L., Sirghi F., Tatsuno H., Tucaković I., Vazquez Doce O., Widmann E., and Zmeskal J.

Subjects
Physics and Astronomy (all), sezele, Physics, QC1-999, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment, lcsh:Physics, lcsh:QC1-999
Abstract

The AMADEUS experiment has the aim to perform studies of the low energy hadronic interactions of negatively charged kaons with nucleons and nuclei, which are fundamental to solve longstanding open questions in the non-perturbative QCD in the strangeness sector. The DAΦNE collider provides a unique source of monochromatic low-momentum kaons, whose nuclear interaction with the materials of the KLOE detector (used as an active target) provide us excellent acceptance and resolution data for K− capture on H, 4He, 9Be and 12C, both at-rest and in-flight. AMADEUS step 0 consisted in the analysis of the 2004-2005 KLOE data. A second step consisted in the implementation in the central region of the KLOE detector of a pure graphite target, providing a high statistic sample of K− 12C nuclear captures at rest. For the future, new setups for various dedicated targets are under preparation. The aim of such investigations is to face the major open questions in hadron nuclear physics in the strangeness sector, such as the nature of the Λ(1405) state and the resonant versus non-resonant yield in nuclear K− capture, the possible existence of kaonic nuclear clusters, strongly related to a quantitative understanding of single versus multi-nucleon K− absorption.

Published
2014

38. Beam asymmetry Sigma in eta-prime photoproduction off the proton at the GRAAL experiment

Author

Mandaglio, G., Bellini, V., Bocquet, J. P., Capogni, M., Curciarello, F., D'Angelo, A., De Leo, V., Didelez, J. P., Di Salvo, R., Fantini, A., Franco, D., Gervino, G., Ghio, F., Giardina, G., Girolami, B., Lapik, A. M., Levi Sandri, P., Lleres, A., Mammoliti, F., Manganaro, M., Moricciani, D., Mushkarenkov, A. N., Nedorezov, V. G., Rebreyend, D., Rudnev, N. V., Schaerf, C., Sperduto, M. L., Sutera, C. M., Turinge, A., Vegna, V., and Zonta, I.

Published
2014

39. Analysis of the etaI photoproduction off the proton and preliminary beam asymmetry results at the GRAAL experiment

Author

Mandaglio, G., Bellini, Vincenzo, Bocquet, J. P., Capogni, M., Curciarello, F., D’Angelo, A., Deleo, V., Didelez, J. P., Di Salvo, R., Fantini, A., Franco, D., Gervino, G., Ghio, F., Giardina, G., Girolami, B., Lapik, A. M., Levi Sandri, P., Lleres, A., Mammoliti, Francesco, Manganaro, M., Moricciani, D., Mushkarenkov, A. N., Nedorezov, V. G., Rebreyend, D., Rudnev, N. V., Schaerf, C., Sperduto, M. L., Sutera, M. C., Turinge, A., Vegna, V., and Zonta, I.

Published
2014

40. Experimental study of high-energy resolution lead/scintillating fiber calorimetry in the 600–1200 MeV energy region

Author

Bellini, V, Bianco, S, Capogni, M, Casano, L, D'Angelo, A, Fabbri, F, Ghio, F, Giardoni, M, Girolami, B, Hu, L, Levi, S, Null, P, Moricciani, D, Nobili, G, Passamonti, L, Russo, V, Sarwar, S, and Schaerf, C

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Photon, Physics::Instrumentation and Detectors, business.industry, Detector, Resolution (electron density), Physics::Optics, Calorimetry, Settore FIS/04 - Fisica Nucleare e Subnucleare, Optics, Surface-area-to-volume ratio, Fiber, business, Instrumentation, Energy (signal processing)
Abstract

An experimental investigation has been carried out on the properties of electromagnetic shower detectors, composed of a uniform array of plastic scintillating fibers and lead (50:35 by volume ratio) for photons in the energy range 600–1200 MeV. When the photon's incidence angle to the fiber axis is within ±2° an energy resolution of σ E E(%) =5.12 E[ GeV ]+1.71 has been observed.

Published
1997
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41. Measurement of the \Sigma\ beam asymmetry for the \omega\ photo-production off the proton and the neutron at GRAAL

Author

Vegna, V., D'Angelo, A., Bartalini, O., Bellini, V., Boquet, J.P., Capogni, M., Casano, L. E., Castoldi, M., Curciarello, F., De Leo, V., Didelez, J. P., Di Salvo, R., Fantini, A., Franco, D., Gervino, G., Ghio, F., Giardina, G., Girolami, B., Giusa, A., Lapik, A., Sandri, P. Levi, Lleres, A., Mammoliti, F., Mandaglio, G., Manganaro, M., Moricciani, D., Mushkarenkov, A., Nedorezov, V., Randieri, C., Rebreyend, D., Rudnev, N., Russo, G., Schaerf, C., Sperduto, M. L., Sutera, M. C., Turinge, A., Zonta, I., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and GRAAL

Subjects
Nuclear Theory, High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

We report on new measurements of the beam asymmetry for \omega\ photo-production on proton and neutron in Hydrogen and Deuterium targets from the GRAAL collaboration. The beam asymmetry values are extracted from the reaction threshold (E_{\gamma} = 1.1 GeV in the free nucleon kinematics) up to 1.5 GeV of incoming photon energy. For the first time both the radiative and the three-pion decay channels are simultaneously investigated on the free proton. Results from the two decay channels are in agreement and provide important constraints for the determination of resonant state contributions to the \omega\ production mechanism. First experimental results on the deuteron allow the extraction of the \Sigma\ beam asymmetry on quasi-free nucleons. Comparison of the results for free and quasi-free kinematics on the proton shows a generally reasonable agreement, similar to the findings in pseudo-scalar meson photo-production reactions. For the first time measurements on quasi-free neutrons are available, showing that both the strength and the angular distributions of the beam asymmetry are sensibly different from the results on the proton target., Comment: 15 pages, 10 figures and 1 table

Published
2013
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46. Measurement of the �� beam asymmetry for the �� photo-production off the proton and the neutron at GRAAL

Author

Vegna, V., D'Angelo, A., Bartalini, O., Bellini, V., Boquet, J. P., Capogni, M., Casano, L. E., Castoldi, M., Curciarello, F., De Leo, V., Didelez, J. P., Di Salvo, R., Fantini, A., Franco, D., Gervino, G., Ghio, F., Giardina, G., Girolami, B., Giusa, A., Lapik, A., Sandri, P. Levi, Lleres, A., Mammoliti, F., Mandaglio, G., Manganaro, M., Moricciani, D., Mushkarenkov, A., Nedorezov, V., Randieri, C., Rebreyend, D., Rudnev, N., Russo, G., Schaerf, C., Sperduto, M. L., Sutera, M. C., Turinge, A., and Zonta, I.

Subjects
Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

We report on new measurements of the beam asymmetry for �� photo-production on proton and neutron in Hydrogen and Deuterium targets from the GRAAL collaboration. The beam asymmetry values are extracted from the reaction threshold (E_�� = 1.1 GeV in the free nucleon kinematics) up to 1.5 GeV of incoming photon energy. For the first time both the radiative and the three-pion decay channels are simultaneously investigated on the free proton. Results from the two decay channels are in agreement and provide important constraints for the determination of resonant state contributions to the �� production mechanism. First experimental results on the deuteron allow the extraction of the �� beam asymmetry on quasi-free nucleons. Comparison of the results for free and quasi-free kinematics on the proton shows a generally reasonable agreement, similar to the findings in pseudo-scalar meson photo-production reactions. For the first time measurements on quasi-free neutrons are available, showing that both the strength and the angular distributions of the beam asymmetry are sensibly different from the results on the proton target., 15 pages, 10 figures and 1 table

Published
2013
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47. Studies of the K¯N interaction at DAΦNE

Author

Vázquez Doce, O., Bazzi, M., Berucci, C., Bombelli, Luca, Bragadireanu, A. M., Cargnelli, M., Clozza, A., Curceanu, C., D’Uffizi, A., Fiorini, CARLO ETTORE, Ghio, F., Guaraldo, C., Iliescu, M., Ishiwatari, T., Levi Sandri, P., Longoni, ANTONIO FRANCESCO, Marton, J., Okada, S., Pietreanu, D., Piscicchia, K., Poli Lener, M., Ponta, T., Rizzo, A., Romero Vidal, A., Sbardella, E., Scordo, A., Shi, H., Sirghi, D. L., Sirghi, F., Tatsuno, H., Widmann, E., and Zmeskal, J.

Subjects
sezele
Published
2012

48. Precision spectroscopy of light kaonic atom X-rays in the SIDDHARTA experiment

Author

Cargnelli, M., Bazzi, M., Beer, G., Bombelli, Luca, Bragadireanu, A. M., Curceanu, C., Fiorini, CARLO ETTORE, Frizzi, Tommaso, Ghio, F., Girolami, B., Guaraldo, C., Hayano, R., Iliescu, M., Ishiwatari, T., Iwasaki, M., Kienle, P., Lechner, P., Levi Sandri, P., Longoni, ANTONIO FRANCESCO, Lucherini, V., Marton, J., Okada, S., Pietreanu, D., Ponta, T., Romero Vidal, A., Scordo, A., Shi, H. X., Sirghi, D. L., Sirghi, F., Soltau, H., Strüder, L., Tatsuno, H., Vazquez Doce, O., Widmann, E., and Zmeskal, J.

Subjects
sezele
Published
2011

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