Abstract
We study the impact of new physics models in the charge asymmetry defined for LHC final states consisting of two same-sign leptons (2SSl, with l = e, μ) plus jets (Njets ≥ 2), with a center-of-mass energy of \( \sqrt{s} \) = 13 TeV, where the main SM contribution is \( t\overline{t}W \) production. Concretely, we consider three different new physics sources for the charge asymmetries: a heavy neutral scalar/pseudoscalar arising from the general two Higgs doublet model, an effective theory with dimension-6 four-quark operators, and a simplified R-parity-violating supersymmetric model with electroweakino production (higgsino-like or wino-like). We propose measuring the charge asymmetries differentially with respect to several kinematic observables, and inclusively/exclusively with the number of b-tagged jets in the final state (Nb ≥ {1, 2, 3}). Results are compared with the SM prediction using the χ2 criteria, expressing sensitivity in terms of the normal Gaussian significance. We show that some of the proposed new physics scenarios can be probed at the LHC even for the already recorded integrated luminosity of 139 fb−1. Finally, we also estimate the prospects for the potential LHC sensitivity to the considered new physics models in its high-luminosity phase.
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Acknowledgments
RMSS thanks Martin de los Rios for useful discussions. EA and RMSS acknowledge financial support from the “Atracción de Talento” program (Modalidad 1) of the Comunidad de Madrid (Spain) under the grant number 2019-T1/TIC-14019, the Spanish Research Agency (Agencia Estatal de Investigación) through the Grant IFT Centro de Excelencia Severo Ochoa No CEX2020-001007-S and the grant PID2021-124704NB-I00 funded by MCIN/AEI/10.13039/501100011033. LD acknowledges support from PIP-11220200101426 and PICT-2017-2751. AJ was supported in part by the grants RTI2018-096930-B-I00 and PID2021-125273NB-I00. AM acknowledges support from CONICET and ANPCyT under project PICT 2018-03682.
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Arganda, E., Da Rold, L., Juste, A. et al. Probing new physics with charge asymmetries in 2 same-sign leptons plus jets final states at the LHC. J. High Energ. Phys. 2024, 156 (2024). https://doi.org/10.1007/JHEP01(2024)156
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DOI: https://doi.org/10.1007/JHEP01(2024)156