Abstract (prl232502)

High Resolution Spectroscopy of the 12LB Hypernucleus Produced by the (e,e´K⁺) Reaction

T. Miyoshi,¹ M. Sarsour,² L. Yuan,³ X. Zhu,³ A. Ahmidouch,⁴ P. Ambrozewicz,⁵ D. Androic,⁶ T. Angelescu,⁷ R. Asaturyan,⁸ S. Avery,³ O. K. Baker,^3,10 I. Bertovic,⁶ H. Breuer,⁹ R. Carlini,¹⁰ J. Cha,³ R. Chrien,¹¹ M. Christy,³ L. Cole,³ S. Danagoulian,⁴ D. Dehnhard,¹² M. Elaasar,¹³ A. Empl,² R. Ent,¹⁰ H. Fenker,¹⁰ Y. Fujii,¹ M. Furic,⁶ L. Gan,³ K. Garrow,¹⁰ A. Gasparian,³ P. Gueye,³ M. Harvey,³ O. Hashimoto,¹ W. Hinton,³ B. Hu,³ E. Hungerford,² C. Jackson,³ K. Johnston,¹⁵ H. Juengst,¹² C. Keppel,³ K. Lan,² Y. Liang,³ V. P. Likhachev,¹⁶ J. H. Liu,¹² D. Mack,¹⁰ A. Margaryan,⁸ P. Markowitz,¹⁷ J. Martoff,⁵ H. Mkrtchyan,⁸ S. N. Nakamura,¹ T. Petkovic,⁶ J. Reinhold,¹⁷ J. Roche,¹⁸ Y. Sato,^1,3 R. Sawafta,⁴ N. Simicevic,¹⁵ G. Smith,¹⁰ S. Stepanyan,⁸ V. Tadevosyan,⁸ T. Takahashi,¹ K. Tanida,¹⁹ L. Tang,^3,10 M. Ukai,¹ A. Uzzle,³ W. Vulcan,¹⁰ S. Wells,¹⁵ S. Wood,¹⁰ G. Xu,² H. Yamaguchi,¹ and C. Yan¹⁰

(HNSS Collaboration)

¹Tohoku University, Sendai 980-8578, Japan
²University of Houston, Houston, Texas 77204, USA
³Hampton University, Hampton, Virginia 23668, USA
⁴North Carolina A&T State University, Greensboro, North Carolina 27411, USA
⁵Temple University, Philadelphia, Pennsylvania 19122, USA
⁶University of Zagreb, Zagreb, Croatia
⁷University of Bucharest, Bucharest, Romania
⁸Yerevan Physics Institute, Yerevan, Armenia
⁹University of Maryland, College Park, Maryland 20742, USA
¹⁰Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
¹¹Brookhaven National Laboratory, Upton, New York 11973, USA
¹²University of Minnesota, Minneapolis, Minnesota 55455, USA
¹³Southern University at New Orleans, New Orleans, Louisiana 70126, USA
¹⁴Rensselaer Polytechnic Institute, Troy, New York 12180, USA
¹⁵Louisiana Tech University, Ruston, Louisiana 71272, USA
¹⁶University of Sao Paulo, Sao Paulo, Brazil
¹⁷Florida International University, Miami, Florida 33199, USA
¹⁸College of William and Mary, Williamsburg, Virginia 23187, USA
¹⁹University of Tokyo, Tokyo 113-0033, Japan

(Received 29 October 2002; published 10 June 2003)

High-energy,cw electron beams at new accelerator facilities allow electromagnetic productionand precision study of hypernuclear structure, and we report hereon the first experiment demonstrating the potential of the (e,e´K⁺)reaction for hypernuclear spectroscopy. This experiment is also the firstto take advantage of the enhanced virtual photon flux availablewhen electrons are scattered at approximately zero degrees. The observed energy resolution was found to be 900 keV for the 12LB spectrum, and is substantially better than any previous hypernuclear experimentusing magnetic spectrometers. The positions of the major excitations arefound to be in agreement with a theoretical prediction andwith a previous binding energy measurement, but additional structure isalso observed in the core excited region, underlining the futurepromise of this technique. ©2003 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v90/e232502

doi: 10.1103/PhysRevLett.90.232502
PACS: 21.80.+a, 25.30.Rw

High Resolution Spectroscopy of the 12LB Hypernucleus Produced by the (e,e´K+) Reaction

(Received 29 October 2002; published 10 June 2003)

High Resolution Spectroscopy of the 12LB Hypernucleus Produced by the (e,e´K⁺) Reaction