SCET中的功率计数和模式
Power Counting and Modes in SCET
摘要：
我们提出了一个制定的软共线有效理论（SCET）在双喷流部门作为一个理论的解耦部门的QCD耦合到威尔逊线。该公式是明显的升压不变，不需要在硬匹配尺度Q引入超软模式，并具有明显的功率计数在Q的逆幂。当超软模式不包括在环路中时，SCET中出现的伪红外发散在扇区之间的重叠被正确减去时消失，其方式类似于SCET的熟悉的零仓减法。我们说明了这种方法，通过分析深非弹性散射在SCET的端点区域和其他应用程序的评论。
英文摘要：
We present a formulation of soft-collinear effective theory (SCET) in the two-jet sector as a theory of decoupled sectors of QCD coupled to Wilson lines. The formulation is manifestly boost-invariant, does not require the introduction of ultrasoft modes at the hard matching scale Q, and has manifest power counting in inverse powers of Q. The spurious infrared divergences which arise in SCET when ultrasoft modes are not included in loops disappear when the overlap between the sectors is correctly subtracted, in a manner similar to the familiar zero-bin subtraction of SCET. We illustrate this approach by analyzing deep inelastic scattering in the endpoint region in SCET and comment on other applications.
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