Nd elastic scattering at 250 Me V Faddeev

N+d elastic scattering at 250 Me. V Faddeev calc (by Prof. H. Kamada) : NN only (CD-Bonn, AV 18, Nijmegen-I, II, 93) : NN with TM-3 NF : AV 18+Urbana. IX-3 NF : CD-Bonn+TM 99 -3 NF K. Sekiguchi et al. Phys. Rev. C 65, 034003 (2002) p+d (K. Hatanaka et. al, PRC 66(2002)044002) & n+d (Y. Maeda et. al, PRC 76(2002)014004) measurements at RCNP Large discrepancies between data & 3 NF predictions at qcm = 110 -- 180 deg. N+d scattering at 250 Me. V shows different results from that at below 135 Me. V

Calculations with D–excitation 3 NF The effects of the D-excitation by any mesons (calc. by Lisbon -Hannover Gr. ) u D-excitations are explicitly included by the coupled channel method p-r, r-r and 3 p-ring type 3 NF(illinois model) are included effectively. u No large superiority to the 2 p –exchange type 3 NF. What we are missing?

ベクトル偏極分解能 Final state interaction (FSI) 近傍 ＠ 200 Me. V (q～ 740 Me. V/c) J. Kuroś, Doctoral Dissertation (2002) : NN only : NN with TM-3 NF : AV 18+Ur. IX-3 NF : CD-Bonn +TM’-3 NF f 12 = f 1 - f 2 FSI configuration (q 1= q 2 , f 12 =0) 近傍で S-curve に沿った測定を行うと、弾性散 乱からは引き出せない三体力の情報が見える可能性がある。

実験方法 Configuration: (qp 1= qn = 40 deg , f 1 n = 0 deg) (qp 1= 40 deg, qp 2 ～ 67 deg , f 12 = 180 deg) u LASの磁場及びGRの角度・磁場を変えながら測定（３セット） q. LAS = 40 deg Ep 1 = 50 ~ 115 Me. V QFS q. GR ~ 67 deg Ep 2 = 116 ~ 120 Me. V S-curve polarized proton beam Ep = 250 Me. V B. I. = 50 n. A polarization ~ 70 % CD 2 target Liq D 2 target FSI QFS S=0[Me. V]

Missing Mass

実験結果(1) pd breakup at 250 Me. V Calc. by Prof. Kamada (KIT) 微分散乱断面積 u DEp 1 = 5 Me. V-bin (DS = 7 Me. V-bin) y r a n i m i l e r P u 統計誤差 < 1% 青線：アクセプタンス中心 (qp 1= qn = 40 deg , f 1 n = 0 deg) 赤線：角度アクセプタンス を考慮 w/o 3 NF Around FSI Around CS Min. With 3 NF Good

実験結果(3) Lisbon-Hannover Gr. の計算 pd breakup at 250 Me. V u D-3 NF u Coulomb力無し（緑線） Coulomb力有り（紫線） 理論計算同士の比較 u Coulomb力の効果は小さい y r a n i m i l e Pr