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( F.Cusanno , M.Iodice et al , Phys . Rev. Lett .103 202501 (2009).

High Resolution Hypernuclear Spectroscopy at Jefferson Lab Hall A. ( M. Iodice , F.Cusanno et al. Phys.Rev.Lett . 99,052501 (2007 ). 12 C ( e,e’ K ) 12 B L. 670 keV FWHM. ( F.Cusanno , M.Iodice et al , Phys . Rev. Lett .103 202501 (2009).

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( F.Cusanno , M.Iodice et al , Phys . Rev. Lett .103 202501 (2009).

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  1. High ResolutionHypernuclearSpectroscopy at Jefferson Lab Hall A (M. Iodice,F.Cusannoet al.Phys.Rev.Lett.99,052501 (2007) 12C(e,e’K)12BL 670 keVFWHM (F.Cusanno, M.Iodiceet al,Phys. Rev. Lett.103 202501 (2009). TheWATERFALLtarget: reactions on 16O and 1H nuclei 16O(e,e’K)16NL

  2. 9Be(e,e’K)9LiL (g. MUrciuoli, F. Cusanno, S. Marrone et al) tobesubmittedtoPhys. Rev. Radiative corrected experimental excitation energy vs theoretical data (thin curve). Thick curve: three gaussian fits of the radiative corrected data Experimental excitation energy vs Monte Carlo Data (red curve) and vs Monte Carlo data with radiative Effects “turned off” (blue curve) Radiative corrections do notdepend on the hypothesison the peakstructureproducing the experimental data

  3. Hall A deector setup RICH Detector hadron arm septum magnets electron arm aerogel first generation aerogel second generation To be added to do the experiment

  4. Future Project: Super Hypernuclear Physics at JlabA Study with High Precision on the Electro-production of the  and -Hypernuclei in the Full Mass Range Enge () Unified collaboration from the previous Hall A and C collaborations HRS (e’) Septum Combine the features of previous Hall A and C experiments, create an optimized future program w/ the CEBAF CW beam HKS (K) HES () Septum HRS – HKS: (e, e’K+) experiments for mass spectroscopy HKS – Enge or HKS – HES: New decay -spectroscopy experiment

  5. e,e’ reaction spectroscopy • 1.Elementary L, S0 • Reliable data from1H(e,e’K+)L,S0 at low Q2 • Dynamis, f.f.,… 2.Few-body 2D(e,e’K+)[LN] - Exotic bound state, LN interaction 4He(e,e’K+)4LH - LN, Charge Symmetry Breaking( CSB) 3.Medium-heavy 40,44,48Ca(e,e’K+)40,44,48LK 27Al(e,e’K+)27LMg 48Ti(e,e’K+)48LSc • LN, L’sS.E., iso-spin, A dependence of BL • Mean field approximation • Single particle nature of L • Tri-axial deformation • ,Level inversion due to L • 4. Heavy • 208Pb(e,e’K+) 208LTlL in heaviest nucleus • LN, A dependenceof BL • Meanfieldapproximation • Single particle nature ofL • The roleofthree body forces • Neuronstarsstructure and dynamics

  6. Decay Pion Spectroscopy to Study -Hypernuclei Direct Production Fragmentation Process e’ Example: e’ K+ K+ 12C e 12C * e * p  Fragmentation (<10-16s) s  12B* E.M. p 12Bg.s. Low lying Hypernuclear States 4H Highly Excited Hypernuclear States  4Hg.s.   12C  -  4He  - Weak mesonictwo body decay (~10-10s) 

  7. BNL 3 MeV KEK336 2 MeV Improving energy resolution ~ 1.5 MeV 670 KeV 635 KeV hadron probe vs e.m. probe - Energy resolution - Spinflip and using electromagnetic probe High resolution, high yield, and systematic study is essential

  8. A = 40 A ~ 50 P.H.Pile et al. PRL 66 (1991) 2585 H.Hotchi et al. PRC 64 (2001)044302 51LV 40Ca = (Z=20, N=20) : 40LK = one proton hole + L

  9. TheWATERFALLtarget: reactions on 16O and 1H nuclei H2O “foil” Be windows H2O “foil”

  10. Results on the WATERFALLtarget - 16O and 1H 1H(e,e’K)L 1H(e,e’K)L,S L Energy Calibration Run S 16O(e,e’K)16NL • Water thickness from elastic cross section on H • Precise determination of the particle momenta and beam energy • using the Land Speakreconstruction (energy scale calibration)

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