Spectroscopy of Lambda-9Li by electroproduction
Abstract
In the absence of accurate data on the free two-body hyperon-nucleon interaction, the spectra of hypernuclei can provide information on the details of the effective hyperon-nucleon interaction. Electroproduction of the hypernucleus Lambda-9Li has been studied for the first time with sub-MeV energy resolution in Hall A at Jefferson Lab on a 9Be target. In order to increase the counting rate and to provide unambiguous kaon identification, two superconducting septum magnets and a Ring Imaging CHerenkov detector (RICH) were added to the Hall A standard equipment. The cross section to low-lying states of Lambda-9Li is concentrated within 3 MeV of the ground state and can be fitted with four peaks. The positions of the doublets agree with theory while a disagreement could exist with respect to the relative strengths of the peaks in the doublets. A Lambda separation energy of 8.36 +- 0.08 (stat.) +- 0.08 (syst.) MeV was measured, in agreement with an earlier experiment.
Cite
@article{arxiv.1405.5839,
title = {Spectroscopy of Lambda-9Li by electroproduction},
author = {G. M. Urciuoli and F. Cusanno and S. Marrone and A. Acha and P. Ambrozewicz and K. A. Aniol and P. Baturin and P. Y. Bertin and H. Benaoum and K. I. Blomqvist and W. U. Boeglin and H. Breuer and P. Brindza and P. Bydzovsky and A. Camsonne and C. C. Chang and J. -P. Chen and Seonho Choi and E. A. Chudakov and E. Cisbani and S. Colilli and L. Coman and B. J. Craver and G. De Cataldo and C. W. de Jager and R. De Leo and A. P. Deur and C. Ferdi and R. J. Feuerbach and E. Folts and R. Fratoni and S. Frullani and F. Garibaldi and O. Gayou and F. Giuliani and J. Gomez and M. Gricia and J. O. Hansen and D. Hayes and D. W. Higinbotham and T. K. Holmstrom and C. E. Hyde and H. F. Ibrahim and M. Iodice and X. Jiang and L. J. Kaufman and K. Kino and B. Kross and L. Lagamba and J. J. LeRose and R. A. Lindgren and M. Lucentini and D. J. Margaziotis and P. Markowitz and Z. E. Meziani and K. McCormick and R. W. Michaels and D. J. Millener and T. Miyoshi and B. Moffit and P. A. Monaghan and M. Moteabbed and C. Munoz Camacho and S. Nanda and E. Nappi and V. V. Nelyubin and B. E. Norum and Y. Okasyasu and K. D. Paschke and C. F. Perdrisat and E. Piasetzky and V. A. Punjabi and Y. Qiang and P. E. Reimer and J. Reinhold and B. Reitz and R. E. Roche and V. M. Rodriguez and A. Saha and F. Santavenere and A. J. Sarty and J. Segal and A. Shahinyan and J. Singh and S. Sirca and R. Snyder and P. H. Solvignon and M. Sotona and R. Subedi and V. A. Sulkosky and T. Suzuki and H. Ueno and P. E. Ulmer and P. Veneroni and E. Voutier and B. B. Wojtsekhowski and X. Zheng and C. Zorn},
journal= {arXiv preprint arXiv:1405.5839},
year = {2015}
}
Comments
14 pages, 8 figures