Conformal collider physics at large charge

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Abstract
A bstract: We study energy correlators and other event shapes in states created by operators with large global U(1) charge Q in Conformal Field Theories. Focusing on theories whose large charge sector is described by the superfluid Effective Field Theory (EFT), we develop a systematic framework to compute event shapes within the EFT. As formerly observed, event shapes at leading order in 1/ Q factorize into a product of classical expectation values determined by symmetry. In contrast, the subleading contribution to energy-energy and charge-charge correlators is a nontrivial prediction of the EFT, which we compute explicitly. Our results reveal a sharp collinear enhancement of the correlation between detectors, induced by the propagation of sound. We also generalize our findings to a broad class of event shapes.
Funding Information
  • Simons Foundation (994296)
  • United States - Israel Binational Science Foundation (2018068)
  • Swiss National Science Foundation (200020-213104)
  • National Science Foundation (PHY-2210361)

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