CERN Accelerating science

Article
Report number	arXiv:1912.00699
Title	The anomalous production of multi-lepton and its impact on the measurement of $Wh$ production at the LHC
Author(s)	Hernandez, Yesenia (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Kumar, Mukesh (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Cornell, Alan S. (Johannesburg U.) ; Dahbi, Salah-Eddine (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Fang, Yaquan (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Lieberman, Benjamin (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Mellado, Bruce (U. Witwatersrand, Johannesburg, Sch. Phys. ; iThemba LABS) ; Monnakgotla, Kgomotso (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Ruan, Xifeng (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Xin, Shuiting (Beijing, GUCAS ; Beijing, Inst. High Energy Phys.)
Publication	2021-04-27
Imprint	2019-12-02
Number of pages	13
Note	13 pages, 1 table, 11 figures. Version accepted for publication in European Physical Journal C
In:	Eur. Phys. J. C 81 (2021) 365
DOI	10.1140/epjc/s10052-021-09137-1 (publication)
Subject category	hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Accelerator/Facility, Experiment	CERN LHC
Abstract	Anomalies in multi-lepton final states at the Large Hadron Collider (LHC) have been reported in Refs. \cite{vonBuddenbrock:2017gvy,vonBuddenbrock:2019ajh}. These can be interpreted in terms of the production of a heavy boson, $H$, decaying into a Standard Model (SM) Higgs boson, $h$, and a singlet scalar, $S$, which is treated as a SM Higgs-like boson. This process would naturally affect the measurement of the $Wh$ signal strength at the LHC, where $h$ is produced in association with leptons and di-jets. Here, $h$ would be produced with lower transverse momentum, $p_{Th}$, compared to SM processes. Corners of the phase-space are fixed according to the model parameters derived in Refs. \cite{vonBuddenbrock:2016rmr,vonBuddenbrock:2017gvy} without additional tuning, thus nullifying potential look-else-where effects or selection biases. Provided that no stringent requirements are made on $p_{Th}$ or related observables, the signal strength of $Wh$ is $\mu(Wh)=2.41 \pm 0.37$. This corresponds to a deviation from the SM of $3.8\sigma$. This result further strengthens the need to measure with precision the SM Higgs boson couplings in $e^+e^-$, and $e^-p$ collisions, in addition to $pp$ collisions.
Copyright/License	CC-BY-4.0 preprint: (Licenses: CC0 1.0, arXiv nonexclusive-distrib 1.0)

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