2019/09/30 by Tao Liu, Xi Tong, Yi Wang +1 · 1 citation
Physics and Astronomy · #Collider #Correlation function (quantum field theory) #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Function (biology) #Large Hadron Collider #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Scalar (mathematics) #Scaling #Trispectrum #Unparticle physics #astro-ph.CO #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1007/jhep04(2020)189
published as JHEP 04 (2020) 189 · 22 pages, 8 figures; v2:references added; v3:appendix added, small changes in the text
openalex created_date 2019/09/12 · openalex publication_date 2020/04/01 · arxiv created 2020/05/16 · arxiv updated 2020/05/20 · openalex updated_date 2026/08/05
A bstract In direct analogy to the 4-body decay of a heavy scalar particle, the 4-point correlation function of primordial fluctuations carries P and CP information. The CP violation appears as a P-odd angular dependence in the imaginary part of the trispectrum in momentum space. We construct a model with axion-like couplings which leads to observably large CP-violating trispectrum for future surveys. Furthermore, we show the importance of on-shell particle production in observing P- and CP-violating signals. It is impossible to observe these signals from local 4-scalar EFT operators that respect dilation symmetry, and thus any such observation can rule out single-field EFT with sufficiently small slow-roll parameters. This calculation opens a new frontier of studying P and CP at very high energy scales.