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Journal Article
Missing energy plus jet in the SMEFT
2024
Overview
A
bstract
We study the production of dineutrinos in proton-proton collisions, with large missing transverse energy and an energetic jet as the experimental signature. Recasting a search from the ATLAS collaboration we work out constraints on semileptonic four-fermion operators, gluon and electroweak dipole operators and
Z
-penguins in the SMEFT. All but the
Z
-penguin operators experience energy-enhancement. Constraints on gluon dipole operators are the strongest, probing new physics up to 14 TeV, and improve over existing ones from collider studies. Limits on FCNC four-fermion operators are competitive with Drell-Yan production of dileptons, and improve on those for tau final states. For left-handed |∆
s
| = |∆
d
| = 1 and right-handed |∆
c
| = |∆
u
| = 1 transitions these are the best available limits, also considering rare kaon and charm decays. We estimate improvements for the 3000 fb
−1
High Luminosity Large Hadron Collider.
