High resolution spectroscopy of BΛ12 by electroproduction

M. Iodice, F. Cusanno, A. Acha, P. Ambrozewicz, K. A. Aniol, P. Baturin, P. Y. Bertin, H. Benaoum, K. I. Blomqvist, W. U. Boeglin, H. Breuer, P. Brindza, P. Bydžovský, A. Camsonne, C. C. Chang, J. P. Chen, Seonho Choi, E. A. Chudakov, E. Cisbani, S. ColilliL. Coman, B. J. Craver, G. De Cataldo, C. W. De Jager, R. De Leo, A. P. Deur, C. Ferdi, R. J. Feuerbach, E. Folts, R. Fratoni, S. Frullani, F. Garibaldi, O. Gayou, F. Giulani, J. Gomez, M. Gricia, J. O. Hansen, D. Hayes, D. W. Higinbotham, T. K. Holmstrom, C. E. Hyde, H. F. Ibrahim, X. Jiang, L. J. Kaufman, K. Kino, B. Kross, L. Lagamba, J. J. Lerose, R. A. Lindgren, M. Lucentini, D. J. Margaziotis, P. Markowitz, S. Marrone, Z. E. Meziani, K. McCormick, R. W. Michaels, D. J. Millener, T. Miyoshi, B. Moffit, P. A. Monaghan, M. Moteabbed, C. Muñoz Camacho, S. Nanda, E. Nappi, V. V. Nelyubin, B. E. Norum, Y. Okasyasu, K. D. Paschke, C. F. Perdrisat, E. Piasetzky, V. A. Punjabi, Y. Qiang, B. Raue, P. E. Reimer, J. Reinhold, B. Reitz, R. E. Roche, V. M. Rodriguez, A. Saha, F. Santavenere, A. J. Sarty, J. Segal, A. Shahinyan, J. Singh, S. Širca, R. Snyder, P. H. Solvignon, M. Sotona, R. Subedi, V. A. Sulkosky, T. Suzuki, H. Ueno, P. E. Ulmer, G. M. Urciuoli, P. Veneroni, E. Voutier, B. B. Wojtsekhowski, Y. Ye, X. Zheng, S. Zhou, C. Zorn

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An experiment measuring electroproduction of hypernuclei has been performed in hall A at Jefferson Lab on a C12 target. In order to increase counting rates and provide unambiguous kaon identification two superconducting septum magnets and a ring imaging Cherenkov detector were added to the hall A standard equipment. An unprecedented energy resolution of less than 700 keV FWHM has been achieved. Thus, the observed BΛ12 spectrum shows for the first time identifiable strength in the core-excited region between the ground-state s-wave Λ peak and the 11 MeV p-wave Λ peak.

Original languageEnglish
Article number052501
JournalPhysical Review Letters
Issue number5
StatePublished - 1 Aug 2007


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