TY  - CONF
AU  - Rygaard, Lovisa
AU  - Niedziela, Jeremi
AU  - Schäfer, Ruth
AU  - Bruggisser, Sebastian
AU  - Alimena, Juliette
AU  - Westhoff, Susanne
AU  - Blekman, Freya
TI  - Search for long-lived axion-like particles in top production
M1  - PUBDB-2024-01551
PY  - 2024
AB  - 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.
T2  - DPG Spring Meeting (German Physical Society)
CY  - 4 Mar 2024 - 8 Mar 2024, Karlsruhe (Germany)
Y2  - 4 Mar 2024 - 8 Mar 2024
M2  - Karlsruhe, Germany
LB  - PUB:(DE-HGF)6
UR  - https://bib-pubdb1.desy.de/record/605869
ER  -