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@INPROCEEDINGS{Rygaard:605869,
      author       = {Rygaard, Lovisa and Niedziela, Jeremi and Schäfer, Ruth
                      and Bruggisser, Sebastian and Alimena, Juliette and
                      Westhoff, Susanne and Blekman, Freya},
      title        = {{S}earch for long-lived axion-like particles in top
                      production},
      reportid     = {PUBDB-2024-01551},
      year         = {2024},
      abstract     = {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.},
      month         = {Mar},
      date          = {2024-03-04},
      organization  = {DPG Spring Meeting (German Physical
                       Society), Karlsruhe (Germany), 4 Mar
                       2024 - 8 Mar 2024},
      cin          = {CMS},
      cid          = {I:(DE-H253)CMS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611)},
      pid          = {G:(DE-HGF)POF4-611},
      experiment   = {EXP:(DE-H253)LHC-Exp-CMS-20150101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://bib-pubdb1.desy.de/record/605869},
}