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Lunch Seminar, July 4

http://www.kek.jp/ja/news/topics/2007/INPC2007.html. Current understanding of the nuclear force. Hiroyuki Kamano. Lunch Seminar, July 4. & Symposium for Centennial Celebration of Hideki Yukawa (June 3). Impact and contribution of Yukawa’s meson theory

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Lunch Seminar, July 4

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  1. http://www.kek.jp/ja/news/topics/2007/INPC2007.html Current understanding of the nuclear force Hiroyuki Kamano Lunch Seminar, July 4 & Symposium for Centennial Celebration of Hideki Yukawa (June 3) Impact and contribution of Yukawa’s meson theory to the modern nuclear physics were mentioned.

  2. W. Weise “Overview and perspectives in Nuclear Physics” : Plenary talk in INPC2007 Treatment of quark-gluon d.o.f. will be inevitable! < 1 fm ~1-2 fm 2 fm < Repulsive core Attractive or heavy meson (r, w, s …)exchange phenomenological approach

  3. ( : s-wave projected NN w.f.; : reduced mass) “Nuclear Force from Lattice QCD” by N. Ishii, S. Aoki, T. Hatsuda, to be published in PRL this week. First successful calculation of the nuclear force from quark-gluon d.o.f. . Review article by Prof. F. Wilczek NN potential: Nature 445,157 (2007) Strategy 1. Calculatethe (s-wave projected) NN wave functionusing the Lattice QCD simulations. • Obtain the central NN potential at each • fixed E from the relation: Several articles for this research also appeared in newspapers June 21. ⇒ Calculated using “Blue Gene/L” at KEK

  4. Lattice QCD result of the NN central potential pure Vc Lattice QCD “effective” Vc = pure Vc + DVc Yukawa’s theory (1p exchange) coupling effect with 3D1 state. Lattice QCD captures the essential features of the NN potential in all region! • Yukawa’s result (long distance) • Repulsive core (short distance)

  5. Summary and Perspectives • Further improvements are needed for the quantitative estimations: -Include the virtual pair contribution (non-quenched calculation) - Use the physical mass. • Calculation of other components of the NN potential (LS, tensor etc.) • Investigation of physical origin of the repulsive core. • Application to (“prediction” of) Nucleon-Hyperon1) and Hyperon-Hyperon potentials. ⇔ Interpretation of Yukawa’s theory: Which contributions and/or mechanisms are responsible for the repulsive core? Closely related to the experimental research of hypernuclei at J-PARC2) 1) Hyperon = Baryon with “strangeness” 2) J-PARC = Japan Proton Accelerator Research Complex

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