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arXiv 2402.09256hep-th
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有效场论中的天体共形原初算符

Celestial Conformal Primaries in Effective Field Theories

Prahar Mitra

AI总结:

本文研究了有效场论中更一般的复标度维数共形原初算符,证明其满足完备性与CPT一致性需限制为实数或特定复数形式,其中实标度维数算符无需紫外知识即可定义。

摘要:

通过在boost本征态而非动量本征态的基矢下工作,$d+2$维中的散射振幅可以重新表述为假定全息CFT$_d$中共形原初算符的关联函数。先前的研究表明,具有 $Δ\in \frac{d}{2} + i {\mathbb R}$ 的共形原初算符构成了无质量单粒子表示的一组基。本文考虑了具有 $Δ\in {\mathbb C}$ 的更一般的共形原初算符,并证明了完备性、可归一化性以及与CPT的一致性意味着我们必须将标度维数限制为 $Δ\in \frac{d}{2} + i {\mathbb R}$ 或 $Δ\in {\mathbb R}$。与具有 $Δ\in \frac{d}{2} + i {\mathbb R}$ 的算符不同,具有 $Δ\in {\mathbb R}$ 的共形原初算符可以在无需紫外(UV)知识的情况下构造,因此可以在有效场论中定义。在额外的解析性假设下,对于玻色子或费米子算符,我们可以分别将其限制为 $Δ\in 2 - {\mathbb Z}_{\geq0}$ 或 $Δ\in \frac{1}{2}-{\mathbb Z}_{\geq0}$。

英文摘要:

Scattering amplitudes in $d+2$ dimensions can be recast as correlators of conformal primary operators in a putative holographic CFT$_d$ by working in a basis of boost eigenstates instead of momentum eigenstates. It has been shown previously that conformal primary operators with $Δ\in \frac{d}{2} + i {\mathbb R}$ form a basis for massless one-particle representations. In this paper, we consider more general conformal primary operators with $Δ\in {\mathbb C}$ and show that completeness, normalizability, and consistency with CPT implies that we must restrict the scaling dimensions to either $Δ\in \frac{d}{2} + i {\mathbb R}$ or $Δ\in {\mathbb R}$. Unlike those with $Δ\in \frac{d}{2} + i {\mathbb R}$, the conformal primaries with $Δ\in {\mathbb R}$ can be constructed without knowledge of the UV and can therefore be defined in effective field theories. With additional analyticity assumptions, we can restrict $Δ\in 2 - {\mathbb Z}_{\geq0}$ or $Δ\in \frac{1}{2}-{\mathbb Z}_{\geq0}$ for bosonic or fermionic operators, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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