环面还是黑盘？
Torus or black disk?
摘要：
我们表明，碰撞质子的相互作用区域看起来完全吸收（黑色）在碰撞参量高达0.4 - 0.5 fm在LHC能量7 TeV。它取决于弹性衍射峰斜率与总截面的比值。在LHC中，相应的参数近似等于1。该比率在较高能量下的行为将表明该区域是否会演化为黑色圆盘或黑色圆环。最近在7 TeV的拟合不能区分这些可能性的限制内的实验不确定性和外推在未测量的转移动量的区域。
英文摘要：
We show that the interaction region of colliding protons looks completely absorptive (black) at the impact parameters up to 0.4 - 0.5 fm at the LHC energy 7 TeV. It is governed by the ratio of the elastic diffraction peak slope to the total cross section. The corresponding parameter is approximately equal to 1 at the LHC. The behavior of this ratio at higher energies will show if this region will evolve to the black disk or to the black torus. Recent fits at 7 TeV can not distinguish between these possibilities within the limits of experimental indefiniteness and of extrapolations in the regions of unmeasured transferred momenta.
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