INTERNATIONAL NUCLEAR PHYSICS CONFERENCE 2013 6 TH JULY

INTERNATIONAL NUCLEAR PHYSICS CONFERENCE 2013 6 TH JULY 2013, FIRENZE Strange Light Nuclei Strange n a n 1. Unusual or surprising, especially in a way that is difficult to explain or understand 2. having strangeness degree of freedom (only for physists) Satoshi N. Nakamura, Tohoku University

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze Lattice QCD Modarn baryon Interaction models Baryon Interaction QCD Quark degree of freedom SUf(3) Symmetry Nuclear Force Hyperon Force Lots of NN scattering data Limited YN/YY scattering data Established Calculation Tech. Fadeev, Ch. PT, Cluster Model Shell Model Mean Field Nuclear Structure Normal/Exotic nuclei Nuclear Structure Hypernuclei

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze s-shell hypernuclei in 20 th Century 3 H L 4 H L 5 He L Core + L Akaishi D 2 BL(4 LH) = 0. 69 Me. V BL Akaishi D 2 BL(5 LHe) = 3. 01 Me. V 4 H L Underbound Dalitz BL(5 LHe) = 5. 46 Me. V 5 He L Overbound Data from emulsion experiments R. H. Dalitz et al. NPB 47 (1972) 109. D. H. Davis, 50 years of hypernuclear physics I. The early experiments, NPA 754 (2005) 3.

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze N -SN coupling is important n S+ n S 0 n p p p B. F. Gibson et al. , PRC 6 (1972) 741, J. Dabrowski, PRC 8 (1973) 835.

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze N-SN coupling and s-shell HY K. S. Myint, Y. Akaishi et al. NPA 684(2001)592. 0 3 LH 4 LHe 5 LHe 0. 69 0. 13 BL 4 LH Theingi, K. S. Myint, Y. Akaishi ar. Xiv: 1211. 5719 0. 99 2. 04 1. 24 2. 39 3. 12 p n n n p p Unbalance of isospin Effective LNN force p n

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze Charge Symmetry Breaking Effect of LN interaction 1+ 0. 24 Me. V 0. 35 Me. V 4 LH n n p Coulomb effect is small. 0+ n p p 4 LHe Charge Symmetry Breaking cf) B(3 H)-B(3 He)-DBc = 764 -693 = 71 ke. V

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze Three-body NN force Modern Yakubovsky and Ch. PT-NLO calculations were performed but they cannot explain A=4, T=1/2, hypernuclei. (A. Nogga, HYP 2012) p N LS mass difference ~ 80 Me. V p S L < N ND mass difference ~ 300 Me. V M(S+) < M(S 0) < M(S-), Consistent understanding of 0+, 1+ of Phenomenological potential : A. R. Bodmer&Q. N. Usmani, PRC 31(1985)1400. DM(S--S+)~8 Me. V 4 4 He H, L L

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze B of light hypermultiplets 7 4 LH LHe 4 Exp. Data : Emulsion 10 a n n 67 events LBe n 7 n No reported BL p LLi* n LHe p n p Experimental BL a p 10 98 events 7 DCSB Hiyama et al. PRC 80. 054321 PTP in press. n 167 events p a p 15 events a a LB LBe 1 event p a a 10 events

7 He S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze = 6 He + L behaves like glue 6 He : 2 n halo E. Hiyama et al. PRC 80, 054321 (2009)

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze 7 He Density Distributions 2 n a a n n

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze Production of Hypernuclei s-quark exch. (K-, p-) s, sbar pair cre. (p+, K+) (e, e’K+) n to L No 7 He target 7 He(K-, p-) 7 LHe 7 He(p+, K+) 7 LHe p to L 7 Li(e, e’K) 7 LHe

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze Characteristics of (e, e’K) HY study Ø Electromagnetic production Less Section Huge e’ Background Signal/Noise, Detector Ø Convert Proton to Lambda : Iso-multiplet HY by (p, K), (K, p) Absolute energy calibration with L and S 0 masses Ø Coincidence Measurement (e’, K+) Limited Statistics DC beam is necessary Ø High quality primary beam High energy resolution (< 1 Me. V) Thin enriched target

Facilities for (e, e’K+) Hypernuclear study S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze HES HKS JLab Hall-A HRS+HRS (2004) F. Garibaldi (HN 016) JLab Hall-C HNSS (2000) HKS (2005) HKS+HES (2009) Mainz MAMI-C A 1 Kao. S (2008 -) A. Esser (NF 026)

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze 7 Li(e, e’K+)7 He First observation of 7 He w/ good statistics Last missing information of A=7 hypernuclear iso-triplet FWHM 0. 63 Me. V JLab E 01 -011 collaboration, SNN et al. , Phys. Rev. Lett. 110 (2013) 012502.

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze A=7 Hypernuclear iso-triplet Jlab E 01 -011(HKS) emulsion + g 7 7 LHe n a n LLi* n a p 7 LBe p a p

A=7 Hypernuclear iso-triplet w/CSB S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze Jlab E 01 -011(HKS) Assumed CSB potential may be too naïve. New measurements on A=4 systems are necessary. emulsion + g 7 7 LHe n a n LLi* n a p 7 LBe p a p

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze Light hypernuclei 0 3 LH 4 LHe 5 LHe 6 7 LH LHe 0. 13 BL 0. 99 2. 04 1. 24 2. 39 CSB 3. 12 5. 8 5. 68+0. 03+0. 25 Theingi, K. S. Myint, Y. Akaishi ar. Xiv: 1211. 5719 JLab E 01 -011

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze New Data from FINUDA 0 3 LH 4 LH LHe 5 LHe 6 LH 7 LHe 0. 69 0. 13 BL 4 0. 99 2. 04 1. 24 2. 39 FINUDA E. Botta (HN 005) 3. 12 M. Agnello et al. , PRL 108 (2012) 042501. NPA 881 (2012) 269. 4. 0+1. 1 5. 8 5. 68+0. 03+0. 25 JLab E 01 -011 Theingi, K. S. Myint, Y. Akaishi ar. Xiv: 1211. 5719 M. Agnello et al. Nucl. Phys. A 881 (2012) 269. B. F. Gibson, I. R. Afnan Nucl. Phys. A , DOI 10. 1016/j. nuclphysa. 2013. 02. 017 A. Gal and D. J. Millener, ar. Xiv 1305. 6716

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze New Data from FINUDA 0 3 LH 4 LH LHe 5 LHe 6 LH 7 LHe 0. 69 0. 13 BL 4 0. 99 2. 04 1. 24 2. 39 FINUDA E. Botta (HN 005) 3. 12 M. Agnello et al. , PRL 108 (2012) 042501. NPA 881 (2012) 269. 4. 0+1. 1 5. 08 5. 68+0. 03+0. 25 JLab E 01 -011 Theingi, K. S. Myint, Y. Akaishi ar. Xiv: 1211. 5719 M. Agnello et al. Nucl. Phys. A 881 (2012) 269. B. F. Gibson, I. R. Afnan Nucl. Phys. A , DOI 10. 1016/j. nuclphysa. 2013. 02. 017 A. Gal and D. J. Millener, ar. Xiv 1305. 6716

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze New Data from FINUDA 0 3 LH 4 LH LHe 5 LHe 6 LH 7 LHe 0. 69 0. 13 BL 4 0. 99 2. 04 1. 24 2. 39 Theoretical discussion A. Gal (HN 015) FINUDA E. Botta (HN 005) 3. 12 M. Agnello et al. , PRL 108 (2012) 042501. NPA 881 (2012) 269. 4. 0+1. 1 5. 8 5. 68+0. 03+0. 25 JLab E 01 -011 Theingi, K. S. Myint, Y. Akaishi ar. Xiv: 1211. 5719 M. Agnello et al. Nucl. Phys. A 881 (2012) 269. B. F. Gibson, I. R. Afnan Nucl. Phys. A , DOI 10. 1016/j. nuclphysa. 2013. 02. 017 A. Gal and D. J. Millener, ar. Xiv 1305. 6716

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze New Data from FINUDA 0 3 LH 4 LH LHe 0. 99 2. 04 5 LHe 6 LH 7 LHe J-PARC E 10 H. Sugimura (HN 044) 0. 69 0. 13 BL 4 1. 24 2. 39 Theoretical discussion A. Gal (HN 015) FINUDA E. Botta (HN 005) 3. 12 4. 0+1. 1 5. 8 5. 68+0. 03+0. 25 JLab E 01 -011 Theingi, K. S. Myint, Y. Akaishi ar. Xiv: 1211. 5719 M. Agnello et al. Nucl. Phys. A 881 (2012) 269. B. F. Gibson, I. R. Afnan Nucl. Phys. A , DOI 10. 1016/j. nuclphysa. 2013. 02. 017 A. Gal and D. J. Millener, ar. Xiv 1305. 6716

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze Decay p Spectroscopy of electro-produced HY Study of 4 LH ground state Tag Mπ , p π MHYP Mncl deduce mass spectrometer (FWHM~100 ke. V/c)

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze Kaos at MAMI-C (Mainz Univ. ) p- K+ Pilot experiments performed at MAMI-C in 2011 and 2012

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze p- spectrum tagged by K+ A 1 Hypernuclear Collaboration Kaos + Spek-C (2011) Very preliminary Pion momentum : Not calibrated 4 ΛH Expectation Collaboration is now working to finalize spectra including data taken in 2012.

S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze New Experiment at Jlab (PR 12 -13 -002) Proposed to PAC 40 : A Study with High Precision on the Elecro-production of the L and L -Hypernuclei in the Full Mass Range By JLab hypernuclear Collaboration = previous Hall-A HY + HKS-HES (Hall-C) Decay p spectroscopy & 4 He(e, e’K+) 4 LH are parts of program.

Present Status of Hypernuclear Spectroscopy S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze 27 L Tl 208 LMg 48 12 L B L Sc 40 40 LLKK 44 LK 48 L K 4 LH [LN] L Updated from: O. Hashimoto and H. Tamura, Prog. Part. Nucl. Phys. 57 (2006) 564.

Summary � � S. N. Nakamura, Tohoku Univ. , INPC 2013, Firenze Emulsion data provided s-shell hypernuclei data. LN-SN coupling is important to understand them. Binding energy of 7 LHegs was determined by the (e, e’K+) hypernuclear spectroscopy at JLab with newly developed HKS-HES. Observation of 6 LH by FINUDA collaboration triggered active discussion. Study of decay of electro-produced hypernuclei has began at MAMI-C. (4 LH will be studied). New experimental efforts are on going at JLab, Mainz, J-PARC Light hypernuclei are still strange!