x and ξ scaling of the nuclear structure function at large x
x and ξ scaling of the nuclear structure function at large x
复制标题
大 x 处核结构函数的 x 和 xi 缩放
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
B. Zihlmann
中科院分区：
文献类型：
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作者：
J. Arrington;C. Armstrong;T. Averett;O. Baker;L. D. Bever;C. Bochna;W. Boeglin;B. Bray;R. Carlini;G. Collins;C. Cothran;D. Crabb;D. Day;J. Dunne;D. Dutta;R. Ent;B. Filippone;A. Honegger;E. Hughes;J. Jensen;J. Jourdan;C. Keppel;D. Koltenuk;R. Lindgren;A. Lung;D. Mack;J. Mccarthy;R. Mckeown;D. Meekins;J. Mitchell;H. Mkrtchyan;G. Niculescu;I. Niculescu;T. Petitjean;O. Rondon;I. Sick;C. Smith;B. Terburg;W. Vulcan;S. Wood;C. Yan;J. Zhao;B. Zihlmann
给出了 ^2H、C、Fe 和 Au 靶材的包容性电子散射数据，入射电子能量为 4.045 GeV，动量转移范围从 Q^2=1 到 7 (GeV/c)^2。数据是在杰斐逊实验室获取的低能量损失值，对应于 Bjorken x ≳ 1 的值。结构函数在此范围内未显示 x 的缩放，其中非弹性散射预计不会主导横截面。然而，数据确实显示了 Nachtmann 变量 Ψ 的缩放比例。这种缩放似乎是核子结构函数中的布卢姆-吉尔曼对偶性与原子核中核子的费米运动相结合的结果。由此产生的缩放扩展到更大的 xi 值开启了以比之前认为的更低的 Q^2 值访问高 x 区域中的核结构函数的可能性。
Inclusive electron scattering data are presented for ^2H, C, Fe, and Au targets at an incident electron energy of 4.045 GeV for a range of momentum transfers from Q^2=1 to 7 (GeV/c)^2. Data were taken at Jefferson Laboratory for low values of energy loss, corresponding to values of Bjorken x ≳ 1. The structure functions do not show scaling in x in this range, where inelastic scattering is not expected to dominate the cross section. The data do show scaling, however, in the Nachtmann variable ξ. This scaling appears to be the result of Bloom- Gilman duality in the nucleon structure function combined with the Fermi motion of the nucleons in the nucleus. The resulting extension of scaling to larger values of ξ opens up the possibility of accessing nuclear structure functions in the high-x region at lower values of Q^2 than previously believed.