15 results on '"Sperduto, M. L."'
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2. Rosenbluth separation of the $��^0$ electroproduction cross section
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Defurne, M., Mazouz, M., Albataineh, H., Allada, K., Aniol, K. A., Bellini, V., Benali, M., Boeglin, W., Bertin, P., Brossard, M., Camsonne, A., Canan, M., Chandavar, S., Chen, C., Chen, J. -P., de Jager, C. W., de Leo, R., Desnault, C., Deur, A., Fassi, L. El, Ent, R., Flay, D., Friend, M., Fuchey, E., Frullani, S., Garibaldi, F., Gaskell, D., Giusa, A., Glamazdin, O., Golge, S., Gomez, J., Hansen, O., Higinbotham, D., Holmstrom, T., Horn, T., Huang, J., Huang, M., Hyde, C. E., Iqbal, S., Itard, F., Kang, H., Kelleher, A., Keppel, C., Koirala, S., Korover, I., LeRose, J. J., Lindgren, R., Long, E., Magne, M., Mammei, J., Margaziotis, D. J., Markowitz, P., Jimenez-Arguello, A. Marti, Meddi, F., Meekins, D., Michaels, R., Mihovilovic, M., Camacho, C. Munoz, Nadel-Turonski, P., Nuruzzaman, N., Paremuzyan, R., Puckett, A., Punjabi, V., Qiang, Y., Rakhman, A., Rashad, M. N. H., Riordan, S., Roche, J., Russo, G., Sabati, F., Saenboonruang, K., Saha, A., Sawatzky, B., Selvy, L., Shahinyan, A., Sirca, S., Solvignon, P., Sperduto, M. L., Subedi, R., Sulkosky, V., Sutera, C., Tobias, W. A., Urciuoli, G. M., Wang, D., Wojtsekhowski, B., Yao, H., Ye, Z., Zafar, A., Zhan, X., Zhang, J., Zhao, B., Zhao, Z., Zheng, X., and Zhu, P.
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High Energy Physics - Experiment (hep-ex) ,FOS: Physical sciences ,High Energy Physics::Experiment ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment - Abstract
We present deeply virtual $��^0$ electroproduction cross-section measurements at $x_B$=0.36 and three different $Q^2$--values ranging from 1.5 to 2 GeV$^2$, obtained from experiment E07-007 that ran in the Hall A at Jefferson Lab. The Rosenbluth technique was used to separate the longitudinal and transverse responses. Results demonstrate that the cross section is dominated by its transverse component, and thus is far from the asymptotic limit predicted by perturbative Quantum Chromodynamics. An indication of a non-zero longitudinal contribution is provided by the interference term $��_{LT}$ also measured. Results are compared with several models based on the leading twist approach of Generalized Parton Distributions (GPDs). In particular, a fair agreement is obtained with models where the scattering amplitude is described by a convolution of chiral-odd (transversity) GPDs of the nucleon with the twist-3 pion distribution amplitude. Therefore, neutral pion electroproduction may offer the exciting possibility of accessing transversity GPDs through experiment., Submitted to Physical Review Letters
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- 2016
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3. Evidence for narrow resonant structures at $W \approx 1.68$ and $W \approx 1.72$ GeV in real Compton scattering off the proton
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Kuznetsov, V., Mammoliti, F., Bellini, V., Gervino, G., Ghio, F., Giardina, G., Kim, W., Mandaglio, G., Sperduto, M. L., and Sutera, C.
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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
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- 2015
4. The MOLLER Experiment: An Ultra-Precise Measurement of the Weak Mixing Angle Using M��ller Scattering
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MOLLER Collaboration, Benesch, J., Brindza, P., Carlini, R. D., Chen, J-P., Chudakov, E., Covrig, S., Dalton, M. M., Deur, A., Gaskell, D., Gavalya, A., Gomez, J., Higinbotham, D. W., Keppel, C., Meekins, D., Michaels, R., Moffit, B., Roblin, Y., Suleiman, R., Wines, R., Wojtsekhowski, B., Cates, G., Crabb, D., Day, D., Gnanvo, K., Keller, D., Liyanage, N., Nelyubin, V. V., Nguyen, H., Norum, B., Paschke, K., Sulkosky, V., Zhang, J., Zheng, X., Birchall, J., Blunden, P., Gericke, M. T. W., Falk, W. R., Lee, L., Mammei, J., Page, S. A., van Oers, W. T. H., Dehmelt, K., Deshpande, A., Feege, N., Hemmick, T. K., Kumar, K. S., Kutz, T., Miskimen, R., Ramsey-Musolf, M. J., Riordan, S., Saylor, N. Hirlinger, Bessuille, J., Ihloff, E., Kelsey, J., Kowalski, S., Silwal, R., De Cataldo, G., De Leo, R., Di Bari, D., Lagamba, L., Bellini, E. NappiV., Mammoliti, F., Noto, F., Sperduto, M. L., Sutera, C. M., Cole, P., Forest, T. A., Khandekar, M., McNulty, D., Aulenbacher, K., Baunack, S., Maas, F., Tioukine, V., Gilman, R., Myers, K., Ransome, R., Tadepalli, A., Beniniwattha, R., Holmes, R., Souder, P., Armstrong, D. S., Averett, T. D., Deconinck, W., Duvall, W., Lee, A., Pitt, M. L., Dunne, J. A., Dutta, D., Fassi, L. El, De Persio, F., Meddi, F., Urciuoli, G. M., Cisbani, E., Fanelli, C., Garibaldi, F., Johnston, K., Simicevic, N., Wells, S., King, P. M., Roche, J., Arrington, J., Reimer, P. E., Franklin, G., Quinn, B., Ahmidouch, A., Danagoulian, S., Glamazdin, O., Pomatsalyuk, R., Mammei, R., Martin, J. W., Holmstrom, T., Erler, J., Kolomensky, Yu. G., Napolitano, J., Aniol, K. A., Ramsay, W. D., Korkmaz, E., Spayde, D. T., Benmokhtar, F., Del Dotto, A., Perrino, R., Barkanova, S., Aleksejevs, A., and Singh, J.
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High Energy Physics - Phenomenology (hep-ph) ,Physics::Accelerator Physics ,FOS: Physical sciences ,High Energy Physics::Experiment ,Nuclear Experiment (nucl-ex) - Abstract
The physics case and an experimental overview of the MOLLER (Measurement Of a Lepton Lepton Electroweak Reaction) experiment at the 12 GeV upgraded Jefferson Lab are presented. A highlight of the Fundamental Symmetries subfield of the 2007 NSAC Long Range Plan was the SLAC E158 measurement of the parity-violating asymmetry $A_{PV}$ in polarized electron-electron (M��ller) scattering. The proposed MOLLER experiment will improve on this result by a factor of five, yielding the most precise measurement of the weak mixing angle at low or high energy anticipated over the next decade. This new result would be sensitive to the interference of the electromagnetic amplitude with new neutral current amplitudes as weak as $\sim 10^{-3}\cdot G_F$ from as yet undiscovered dynamics beyond the Standard Model. The resulting discovery reach is unmatched by any proposed experiment measuring a flavor- and CP-conserving process over the next decade, and yields a unique window to new physics at MeV and multi-TeV scales, complementary to direct searches at high energy colliders such as the Large Hadron Collider (LHC). The experiment takes advantage of the unique opportunity provided by the upgraded electron beam energy, luminosity, and stability at Jefferson Laboratory and the extensive experience accumulated in the community after a round of recent successfully completed parity-violating electron scattering experiments
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- 2014
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5. First Measurement of the $��$ Beam Asymmetry in $��^{\prime}$ Photoproduction off the Proton near Threshold
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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.
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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
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- 2014
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6. Measurement of the �� beam asymmetry for the �� photo-production off the proton and the neutron at GRAAL
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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.
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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
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- 2013
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7. Evidence for Narrow N*(1685) Resonance in Quasifree Compton Scattering on the Neutron
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Kuznetsov, V., Polyakov, M. V., Bellini, V., Boiko, T., Chebotarev, S., Dho, H. S., Gervino, G., Ghio, F., Giusa, A., Kim, A., Kim, W., Mammoliti, F., Milman, E., Ni, A., Perevalova, I. A., Randieri, C., Russo, G., Sperduto, M. L., Sutera, C. M., and Vall, A. N.
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High Energy Physics - Phenomenology ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology (hep-ph) ,Astrophysics::High Energy Astrophysical Phenomena ,Nuclear Theory ,FOS: Physical sciences ,High Energy Physics::Experiment ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment ,High Energy Physics - Experiment - Abstract
The first study of quasi-free Compton scattering on the neutron in the energy range of $E_{\gamma}=0.75 - 1.5$ GeV is presented. The data reveals a narrow peak at $W\sim 1.685$ GeV. This result, being considered in conjunction with the recent evidence for a narrow structure at $W\sim 1.68$GeV in the $\eta$ photoproduction on the neutron, suggests the existence of a new nucleon resonance with unusual properties: the mass $M\sim 1.685$GeV, the narrow width $\Gamma \leq 30$MeV, and the much stronger photoexcitation on the neutron than on the proton., Comment: Replaced with the version published in Phys. Rev. C
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- 2010
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8. Beam asymmetry $��$ measurements on the $��^-$ photoproduction off neutrons
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Mandaglio, G., Mammoliti, F., Manganaro, M., Bellini, V., Bocquet, J. P., Casano, L., D'Angelo, A., Di Salvo, R., Fantini, A., Franco, D., Gervino, G., Ghio, F., Giardina, G., Girolami, B., Giusa, A., Ignatov, A., Lapik, A., Sandri, P. Levi, Lleres, A., Moricciani, D., Mushkarenkov, A. N., Nedorezov, V., Randieri, C., Rebreyend, D., Rudnev, N. V., Russo, G., Schaerf, C., Sperduto, M. L., Sutera, M. C., Turinge, A., Vegna, V., Briscoe, W. J., and Strakovsky, I. I.
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Nuclear Theory ,FOS: Physical sciences ,High Energy Physics::Experiment ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment - Abstract
The $��$ beam asymmetry in the photoproduction of negative pions from quasi-free neutrons in a deuterium target was measured at Graal in the energy interval 700 - 1500 MeV and a wide angular range, using polarized and tagged photons. The results are compared with recent partial wave analyses., 8 pages, 9 figures, 1 table, resubmitted to Phys. Rev. C
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- 2010
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9. Evaluation of excitation energy and spin from light charged particles multiplicities in heavy-ion collisions
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Steckmeyer, J. C., Sosin, Z., Grotowski, K., Pawlowski, P., Aiello, S., Anzalone, A., Bini, M., Borderie, B., Bougault, R., Cardella, G., Casini, G., Cavallaro, S., Charvet, J. L., Dayras, R., Filippo, E., Durand, D., Femino, S., Frankland, J. D., Galichet, E., Geraci, M., Giustolisi, F., Guazzoni, P., Iacono Manno, M., Lanzalone, G., Lanzano, G., Le Neindre, N., Lo Nigro, S., Lo Piano, F., Olmi, A., Pagano, A., Papa, M., Marian PARLOG, Pasquali, G., Piantelli, S., Pirrone, S., Politi, G., Porto, F., Rivet, M. F., Rizzo, F., Rosato, E., Roy, R., Sambataro, S., Sperduto, M. L., Stefanini, A. A., Sutera, C., Tamain, B., Vient, E., Volant, C., Wieleczko, J. P., Zetta, L., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CHIMERA, INDRA, Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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 Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
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projectile deexcitation ,excitation energy ,Nuclear Theory ,FOS: Physical sciences ,heavy-ion interactions ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,transport model calculations ,25.70-z, 25.70.Lm, 25.60.Mn ,Nuclear reactions 107Ag(58Ni+X) ,peripheral reactions ,angular momentum transfer ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment ,E=52 A.MeV - Abstract
A simple procedure for evaluating the excitation energy and the spin transfer in heavy-ion dissipative collisions is proposed. It is based on a prediction of the GEMINI evaporation code : for a nucleus with a given excitation energy, the average number of emitted protons decreases with increasing spin, whereas the average number of alpha particles increases. Using that procedure for the reaction 107Ag+58Ni at 52 MeV/nucleon, the excitation energy and spin of quasi-projectiles have been evaluated. The results obtained in this way have been compared with the predictions of a model describing the primary dynamic stage of heavy-ion collisions., 8 pages, 3 figures
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- 2005
10. Eta photoproduction on the neutron at GRAAL : Measurement of the differential cross section
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Rebreyend, D., Bartalini, O., Bellini, V., Bocquet, J.P., Castoldi, M., D'Angelo, A., Didelez, J.-P., Di Salvo, R., Fantini, A., Gervino, G., Ghio, F., Girolami, B., Giusa, A., Guidal, M., Hourany, E., Kouznetsov, V., Kunne, R., Lapik, A., Levi Sandri, P., Lleres, A., Moricciani, D., Nedorezov, V., Russo, G., Rudnev, N., Schaerf, C., Sperduto, M.-L., Sutera, M.C., Turinge, A., 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
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Scattering cross-section ,Physics ,Nuclear and High Energy Physics ,Proton ,010308 nuclear & particles physics ,FOS: Physical sciences ,Astronomy and Astrophysics ,respiratory system ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,PROTON ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Settore FIS/04 - Fisica Nucleare e Subnucleare ,Nuclear physics ,0103 physical sciences ,cardiovascular system ,Neutron ,Nuclear Experiment (nucl-ex) ,010306 general physics ,Nuclear Experiment ,circulatory and respiratory physiology - Abstract
In this contribution, we will present our first preliminary measurement of the differential cross section for the reaction gamma+n->eta+n. Comparison of the reactions gamma+p->eta+p for free and bound proton (D2 target) will also be discussed., 6 pages, 4 figures, Proceedings of the 10th International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon, August 29-September 4 2004, Beijing, China
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- 2004
11. $\eta$ photoproduction off the neutron at GRAAL: Evidence for a resonant structure at W=1.67 GeV
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Kuznetsov, V., Bartalini, O., Bellini, V., Castoldi, M., D'Angelo, A., Didelez, J. -P., Di Salvo, R., Fantini, A., Franco, D., Gervino, G., Ghio, F., Girolami, B., Giusa, A., Guidal, M., Hourany, E., Kunne, R., Lapik, A., Sandri, P. Levi, Moricciani, D., Nicoletti, L., Randalieri, C., Rudnev, N., Russo, G., Schaerf, C., Sperduto, M. -L., Sutera, M. -C., Turinge, A., 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), J.P.Bocquet, V. Kuznetsov, and D. Rebreyend
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Physics ,010308 nuclear & particles physics ,Astrophysics::High Energy Astrophysical Phenomena ,Nuclear Theory ,Structure (category theory) ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,01 natural sciences ,High Energy Physics - Experiment ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Neutron ,High Energy Physics::Experiment ,Nuclear Experiment (nucl-ex) ,010306 general physics ,Nuclear Experiment - Abstract
New (preliminary) data on eta photoproduction off the neutron are presented. These data reveal a resonant structure at W=1.67 GeV., Comment: 8 pages, 4 figures. Published in Proceedings of Workshop on the Physics of Excited Nucleons NSTAR2004, Grenoble, France, March 24 - 27, pg.197
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- 2004
12. Isospin effects on two-particle correlation functions in E/A = 61 MeV 36Ar + 112,124Sn reactions
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Ghetti, R., Avdeichikov, V., Jakobsson, B., Golubev, P., Helgesson, J., Colonna, N., Tagliente, G., Wilschut, H. W., Kopecky, S., Kravchuk, V. L., Anderson, E. W., Nadel-Turonski, P., Westerberg, L., Bellini, V., Sperduto, M. L., and Sutera, C.
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Nuclear Theory ,FOS: Physical sciences ,Physics::Accelerator Physics ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment - Abstract
Small-angle, two-particle correlation functions have been measured for 36Ar+ 112,124Sn collisions at E/A = 61 MeV. Total momentum gated neutron-proton (np) and proton-proton (pp) correlations are stronger for the 124Sn-target. Some of the correlation functions for particle pairs involving deuterons or tritons (nd, pt, and nt) also show a dependence on the isospin of the emitting source., 4 pages, 4 figures. Submitted to Physical Review Letters
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- 2003
13. Study of the dissipative binary channels in the $^{107}$Ag + $^{58}$Ni reaction at 52 MeV/nucleon
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Steckmeyer, J. C., Aiello, S., Anazalone, A., Auger, G., Bini, M., Borderie, B., Bougault, R., Bouriquet, B., Buta, A., Cardella, G., Casini, G., Cavallaro, S., Charvet, J. L., Chbihi, A., Colin, J., Cussol, D., Dayras, R., Cesare, N., Filippo, E., Demeyer, A., Dore, D., Durand, D., Femino, S., Frankland, J. D., Galichet, E., Geraci, M., Gerlic, E., Gingras, L., Giustolisi, F., Guazzoni, P., Guinet, D., Guiot, B., Hudan, S., Lanzalone, G., Lanzano, G., Lautesse, P., Lavaud, F., Lecolley, J. F., Legrain, R., Nicolas Le Neindre, Lo Nigro, S., Lopez, O., Lo Piano, F., Manduci, L., Nalpas, L., Normand, J., Olmi, A., Pagano, A., Papa, M., Pârlog, M., Pasquali, G., Pawlowski, P., Piantelli, S., Pirrone, S., Plagnol, E., Poggi, G., Politi, G., Porto, F., Rivet, M. F., Rizzo, F., Rosato, E., Roy, R., Sambataro, S., Samri, M., Sperduto, M. L., Stefanini, A. A., Sutera, C., Tabacaru, G., Tamain, B., Tassan-Got, L., Vachon, M., Vient, E., Vigilante, M., Volant, C., Wieleczko, J. P., Zetta, L., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-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), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), INDRA, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Flores, Sylvie
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[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Theory ,FOS: Physical sciences ,Nuclear Experiment (nucl-ex) ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Experiment ,Particle Physics - Experiment - Abstract
The binary dissipative channels are characterized by the presence of two main fragments in the exit channel. They have been studied in the 107Ag+58Ni reaction at 52 MeV/nucleon of bombarding energy. For that purpose a modified version of the INDRA multidetector has been used in conjunction with a part of the CHIMERA multidetector. Preliminary results on the excitation energy and intrinsic angular momentum of the quasi-projectile are reported and compared to a dynamical calculation., Comment: 11 pages, 8 figures, Proc. XLth Int. Winter Meeting on Nuclear Physics, Bormio, Italy, January 21-26, edited by I. Iori, 2002, p.198
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- 2002
14. Differential cross section measurement of η photoproduction on the proton from threshold to 1100 MeV
- Author
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GRAAL collaboration, Renard, F., Anghinolfi, M., Bartalini, O., Bellini, V., Bocquet, J. -P., Capogni, M., Castoldi, M., Corvisiero, P., D'Angelo, A., Didelez, J. -P., Di Salvo, R., Gaulard, C., Gervino, G., Ghio, F., Girolami, B., Guidal, M., Hourany, E., Kouznetsov, V., Kunne, R., Lapik, A., Sandri, P. Levi, Lleres, A., Moricciani, D., Nedorezov, V., Nicoletti, L., Rebreyend, D., Rudnev, N., Sanzone, M., Schaerf, C., Sperduto, M. -L., Sutera, M. -C., Taiuti, M., Turinge, A., Zhao, Q., Zucchiatti, A., 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
Scattering cross-section ,Polarization observables ,Particle physics ,Nuclear and High Energy Physics ,EXTRACTION ,Photon ,Proton ,Baryon resonances ,media_common.quotation_subject ,Nuclear Theory ,FOS: Physical sciences ,PION-PHOTOPRODUCTION ,01 natural sciences ,7. Clean energy ,Asymmetry ,SIGMA-BEAM ASYMMETRY ,DECAYS ,High Energy Physics - Experiment ,Settore FIS/04 - Fisica Nucleare e Subnucleare ,High Energy Physics - Experiment (hep-ex) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Eta photoproduction ,010306 general physics ,Nuclear Experiment ,media_common ,Physics ,BARYONS ,010308 nuclear & particles physics ,Eta meson ,Resonance ,ELECTROPRODUCTION ,RESONANCE ,MODEL ,Baryon ,Differential cross section ,Photon beam asymmetry ,Particle Physics - Experiment ,Beam (structure) - Abstract
The differential cross section for the reaction p(gamma, eta p) has been measured from threshold to 1100 MeV photon laboratory energy. For the first time, the region of the S11(1535) resonance is fully covered in a photoproduction experiment and allows a precise extraction of its parameters at the photon point. Above 1000 MeV, S-wave dominance vanishes while a P-wave contribution is observed whose nature will have to be clarified. These high precision data together with the already measured beam asymmetry data will provide stringent constraints on the extraction of new couplings of baryon resonances to the eta meson., 10 pages, 5 figures, submitted to Phys. Letters B. Typos corrected. Some more information on the S11(1535) parameters
- Published
- 2002
15. $^{35}$Cl+$^{12}$C Asymmetrical fission excitation functions
- Author
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Beck, C., Mahboub, D., Nouicer, R., Matsuse, T., Djerroud, B., Freeman, R. M., Haas, F., Hachem, A., Morsad, A., Youlal, M., Sanders, S. J., Dayras, R., Berthoumieux, E., Legrain, R., Pollacco, E., Cavallaro, Sl, De Filippo, E., Lanzano, G., Pagano, A., and Sperduto, M. L.
- Subjects
Nuclear Theory (nucl-th) ,Nuclear Theory ,FOS: Physical sciences ,Nuclear Experiment - Abstract
The fully energy-damped yields from the $^{35}$Cl+$^{12}$C reaction have been systematically investigated using particle-particle coincidence techniques at a $^{35}$Cl bombarding energy of $\sim$ 8 MeV/nucleon. The fragment-fragment correlation data show that the majority of events arises from a binary-decay process with rather large numbers of secondary light-charged particles emitted from the two excited exit fragments. No evidence is observed for ternary break-up events. The binary-process results of the present measurement, along with those of earlier, inclusive experimental data obtained at several lower bombarding energies are compared with predictions of two different kinds of statistical model calculations. These calculations are performed using the transition-state formalism and the Extended Hauser-Feshbach method and are based on the available phase space at the saddle point and scission point of the compound nucleus, respectively. The methods give comparable predictions and are both in good agreement with the experimental results thus confirming the fusion-fission origin of the fully-damped yields. The similarity of the predictions for the two models supports the claim that the scission point configuration is very close to that of the saddle point for the light $^{47}$V mass-asymmetry-dependent fission barriers needed in the transition-state calculation., Comment: 20 pages, revtex, figures available upon request, to appear in Phys. Rev. C
- Published
- 1996
- Full Text
- View/download PDF
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