%0 Conference Paper
%A Rygaard, Lovisa
%A Niedziela, Jeremi
%A Schäfer, Ruth
%A Bruggisser, Sebastian
%A Alimena, Juliette
%A Westhoff, Susanne
%A Blekman, Freya
%T Search for long-lived axion-like particles in top production
%M PUBDB-2024-01551
%D 2024
%X We investigate the discovery potential for long-lived axion-like particles produced in association with a top quark-antiquark pair at the (High-Luminosity) LHC. Compared to inclusive searches for a displaced vertex, top quark associated signals offer new trigger options and an extra handle to suppress background. The search strategy includes axion-like particle decays to a displaced di-muon vertex which further contributes to the suppression of prompt background. For axion-like particles with masses above the di-muon threshold, we find that the (High-Luminosity) LHC can probe effective top-quark couplings as small as  - ctt - /fa = 0.03 (0.002) TeV and proper decay lengths as long as 20 (300) m, assuming a cross section of 1 fb, with data corresponding to an integrated luminosity of 150 fb−1 (3 ab−1). Our predictions suggest that searches for top quark associated displaced di-muons will explore new terrain in the current sensitivity gap between searches for prompt di-muons and missing energy.In this talk I will present the results of our phenomenology study, and the first results of the CMS analysis searching for this same signature.
%B DPG Spring Meeting (German Physical Society)
%C 4 Mar 2024 - 8 Mar 2024, Karlsruhe (Germany)
Y2 4 Mar 2024 - 8 Mar 2024
M2 Karlsruhe, Germany
%F PUB:(DE-HGF)6
%9 Conference Presentation
%U https://bib-pubdb1.desy.de/record/605869