The ALPs from the top: searching for long lived axion-like particles from exotic top decays
- Publication type:
- Journal article
- Metadata:
-
- Abstract
- <jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>We propose a search for long lived axion-like particles (ALPs) in exotic top decays. Flavour-violating ALPs appear as low energy effective theories for various new physics scenarios such as t-channel dark sectors or Froggatt-Nielsen models. In this case the top quark may decay to an ALP and an up- or charm-quark. For masses in the few GeV range, the ALP is long lived across most of the viable parameter space, suggesting a dedicated search. We propose to search for these long lived ALPs in <jats:inline-formula><jats:alternatives><jats:tex-math>$$ t\overline{t} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>t</mml:mi> <mml:mover> <mml:mi>t</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math></jats:alternatives></jats:inline-formula> events, using one top quark as a trigger. We focus on ALPs decaying in the hadronic calorimeter, and show that the ratio of energy deposits in the electromagnetic and hadronic calorimeters as well as track vetoes can efficiently suppress Standard Model backgrounds. Our proposed search can probe exotic top branching ratios smaller than 10<jats:sup><jats:italic>−</jats:italic>4</jats:sup> with a conservative strategy at the upcoming LHC run, and potentially below the 10<jats:sup><jats:italic>−</jats:italic>7</jats:sup> level with more advanced methods. Finally we also show that measurements of single top production probe these branching ratios in the very short and very long lifetime limit at the 10<jats:sup><jats:italic>−</jats:italic>3</jats:sup> level.</jats:p>
- Autoren
- Adrian Carmona
- Fatemeh Elahi
- Christiane Scherb
- Pedro Schwaller
- DOI
- 10.1007/jhep07(2022)122
- eISSN
- 1029-8479
- Ausgabe der Veröffentlichung
- 7
- Zeitschrift
- Journal of High Energy Physics
- Sprache
- en
- Artikelnummer
- 122
- Online publication date
- 2022
- Datum der Veröffentlichung
- 2022
- Status
- Published
- Herausgeber
- Springer Science and Business Media LLC
- Herausgeber URL
- http://dx.doi.org/10.1007/jhep07(2022)122
- Datum der Datenerfassung
- 2022
- Titel
- The ALPs from the top: searching for long lived axion-like particles from exotic top decays
- Ausgabe der Zeitschrift
- 2022
Data source: Crossref
- Other metadata sources:
-
- Beziehungen:
- Property of