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High $P_T$ Higgs excess as a signal of non-local QFT at the LHC

  • Su, Xing-Fu
  • Li, You-Ying
  • Nicolaidou, Rosy
  • Chen, Min
  • Wu, Hsin-Yeh
  • Paganis, Stathes
Published Article
Publication Date
Sep 24, 2021
Submission Date
Aug 24, 2021
DOI: 10.1140/epjc/s10052-021-09577-9
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Non-local extensions of the Standard Model with a non-locality scale $\Lambda_{NL}$ have the effect of smearing the pointlike vertices of the Standard Model. At energies significantly lower than $\Lambda_{NL}$ vertices appear pointlike, while beyond this scale all beta functions vanish and all couplings approach a fixed point leading to scale invariance. Non-local SM extensions are ghost free, with the non-locality scale serving as an effective cutoff to radiative corrections of the Higgs mass. We argue that the data expected to be collected at the LHC phase 2 will have a sensitivity to non-local effects originating from a non-locality scale of a few TeV. Using an infinite derivative prescription, we study modifications to heavy vector-boson cross sections that can lead to an enhanced production of boosted Higgs bosons in a region of the kinematic phase space where the SM background is very small.

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