Eikonal approximation in celestial CFT
Eikonal approximation in celestial CFT
复制标题
天体 CFT 中的 Eikonal 近似
DOI:
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发表时间:
2022
影响因子:
5.4
通讯作者:
A. Raclariu
中科院分区:
文献类型:
--
作者:
Lei Gioia Yang;A. Raclariu
We identify an eikonal regime in celestial CFT_2 in which massless 2-2 scattering is dominated by t-channel exchange. We derive a formula for the celestial amplitude that resums exchanges of arbitrary integer spin to all orders in the coupling. The resulting eikonal phase takes the same form as in flat space with the powers of center-of-mass energy replaced by weight-shifting operators on the celestial sphere. We independently compute the celestial two-point function for a scalar propagating in a shockwave background and show that to leading order in the gravitational coupling and for a suitable choice of the source, the result agrees with the prediction from the celestial eikonal formula for graviton exchange. We demonstrate that this two-point function can be directly obtained from the corresponding formula in AdS_4 in a flat space limit. We finally establish a general relation between scalar celestial amplitudes in celestial CFT_ d− 1 and the flat space limit of scalar AdS_ d +1 Witten diagrams.
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影响因子:
3.5
作者:
Adamo T
通讯作者:
Adamo T
影响因子:
5.4
作者:
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通讯作者:
A. Fotopoulos;S. Stieberger;T. R. Taylor;B. Zhu
影响因子:
4.4
作者:
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通讯作者:
Zhu, Bin
影响因子:
5.4
作者:
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通讯作者:
W. Fan;A. Fotopoulos;S. Stieberger;T. R. Taylor
影响因子:
5.4
作者:
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通讯作者:
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