High Resolution Spectroscopy of 12B_Lambda by Electroproduction

• Published in: Physical review letters 2007-07, Vol.99
• Main Authors: 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. Bydˇzovsk´y, A. Camsonne, C.C. Chang, J.-P. Chen, Seonho Choi, E.A. Chudakov, E. Cisbani, S. Colilli, L. 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. Munoz 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. ˇ Sirca, 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, X. Zheng, and C. Zorn
• Format: Article
• Language: English
• Subjects: CHERENKOV COUNTERS; COUNTING RATES; ELECTROPRODUCTION; ENERGY RESOLUTION; HYPERNUCLEI; KAONS; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; RESOLUTION; SEPTUM MAGNETS; SPECTROSCOPY
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.99.052501

An experiment measuring electroproduction of hypernuclei has been performed in Hall A at Jefferson Lab on a $^{12}$C target. In order to increase counting rates and provide unambiguous kaon identification two superconducting septum magnets and a Ring Imaging CHerenkov detector (RICH) were added to the Hall A standard equipment. An unprecedented energy resolution of less than 700 keV FWHM has been achieved. Thus, the observed \lam{12}{B} spectrum shows for the first time identifiable strength in the core-excited region between the ground-state {\it s}-wave $\Lambda$ peak and the 11 MeV {\it p}-wave $\Lambda$ peak.