Amarian M, Auerbach L, Averett T, Berthot J, Bertin P, Bertozzi W, Black T, Brash E, Brown D, Burtin E, Calarco J, Cates G, Chai Z, Chen J-P, Choi Seonho, Chudakov E, Cisbani E, de Jager C W, Deur A, DiSalvo R, Dieterich S, Djawotho P, Finn J M, Fissum K, Fonvieille H, Frullani S, Gao H, Gao J, Garibaldi F, Gasparian A, Gilad S, Gilman R, Glamazdin A, Glashausser C, Goldberg E, Gomez J, Gorbenko V, Hansen J-O, Hersman B, Holmes R, Huber G M, Hughes E, Humensky B, Incerti S, Iodice M, Jensen S, Jiang X, Jones C, Jones G, Jones M, Jutier C, Ketikyan A, Kominis I, Korsch W, Kramer K, Kumar K, Kumbartzki G, Kuss M, Lakuriqi E, Laveissiere G, Lerose J, Liang M, Liyanage N, Lolos G, Malov S, Marroncle J, McCormick K, McKeown R, Meziani Z-E, Michaels R, Mitchell J, Papandreou Z, Pavlin T, Petratos G G, Pripstein D, Prout D, Ransome R, Roblin Y, Rowntree D, Rvachev M, Sabatie F, Saha A, Slifer K, Souder P, Saito T, Strauch S, Suleiman R, Takahashi K, Teijiro S, Todor L, Tsubota H, Ueno H, Urciuoli G, Van der Meer R, Vernin P, Voskanian H, Wojtsekhowski B, Xiong F, Xu W, Yang J-C, Zhang B, Zołnierczuk P A
Yerevan Physics Institute, Yerevan 375036, Armenia.
Phys Rev Lett. 2004 Oct 8;93(15):152301. doi: 10.1103/PhysRevLett.93.152301. Epub 2004 Oct 5.
The generalized forward spin polarizabilities gamma(0) and delta(LT) of the neutron have been extracted for the first time in a Q2 range from 0.1 to 0.9 GeV2. Since gamma(0) is sensitive to nucleon resonances and delta(LT) is insensitive to the Delta resonance, it is expected that the pair of forward spin polarizabilities should provide benchmark tests of the current understanding of the chiral dynamics of QCD. The new results on delta(LT) show significant disagreement with chiral perturbation theory calculations, while the data for gamma(0) at low Q2 are in good agreement with a next-to-leading-order relativistic baryon chiral perturbation theory calculation. The data show good agreement with the phenomenological MAID model.
首次在0.1至0.9 GeV²的Q²范围内提取了中子的广义前向自旋极化率γ(0)和δ(LT)。由于γ(0)对核子共振敏感，而δ(LT)对Δ共振不敏感，预计这对前向自旋极化率应能为当前对QCD手征动力学的理解提供基准测试。关于δ(LT)的新结果与手征微扰理论计算存在显著分歧，而低Q²时γ(0)的数据与次领头阶相对论重子手征微扰理论计算结果吻合良好。数据与唯象MAID模型吻合良好。
