SAIP2025

Orthogonality study for the A/S→ZdZd→2l2v/2l2j with the ATLAS detector at the LHC

11 Jul 2025, 12:10

20m

Solomon Mahlangu House (University of the Witwatersrand, Johannesburg)

Oral Presentation Track B - Nuclear, Particle and Radiation Physics Nuclear, Particle and Radiation Physics-2

Speaker

Doomnull Unwuchola (University of the Western Cape)

Description

The hidden abelian Higgs model is used for a search for an additional scalar decaying to two Z-dark bosons (Zd) to two leptons, two neutrinos (2l2v) . The search uses 𝑝𝑝 collision data collected with the ATLAS detector at the LHC with an integrated luminosity of 139 fb⁻¹ at a centre-of-mass energy √s= 13 TeV . This is a follow up to the study of the 4l final states [1]. In our 2l2v channel analysis, using the HAHM on Run-2 and Run-3 data with the ATLAS detector to conduct the search for an additional scalar with a distinct mass from the Higgs boson demands study of signal overlap from the 2l2j channel. A technique is introduced to separate signal events of our 2l2v channel from that of the 2l2j channel . We present the work and result of orthogonality study done to achieve this.

[1] ATLAS Collaboration. (2024). Search for a new scalar decaying into new spin-1 bosons in four-lepton final states with the ATLAS detector (CERN-EP-2024-248). arXiv:2410.16781 [hep-ex].