Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 86: Search for New Particles IV

T 86.6: Vortrag

Donnerstag, 18. März 2021, 17:15–17:30, Tk

Vector-Leptoquark Interpretation of the Search for Top Squarks with Decays via Tau Sleptons — •Kyeong Ro Lee and Alexander Mann — Ludwig-Maximilians-Universität, Munich, Germany

Leptoquarks are bosons predicted by various extensions of the Standard Model. Carrying non-zero baryon and lepton numbers, they can decay into a quark-lepton pair and can explain similarities between the lepton and the quark sector of the Standard Model, as well as hints of lepton-flavor universality violation observed in physics of B mesons. Supersymmetry (SUSY) is a framework of theories extending the Standard Model by introducing an additional symmetry between bosons and fermions. If leptoquarks coupling to third-generation fermions (i.e. top and bottom quarks, tau leptons and neutrinos) exist, pair production of such leptoquarks at the LHC would show similar final states as pair-produced top squarks (the SUSY partner of the top quark). More specifically, pair-produced leptoquarks decaying into bottom-tau or top-neutrino pairs will leave similar signatures as pair-produced top squarks decaying via tau sleptons (the SUSY partner of the tau lepton). Thus the search for this SUSY model can be reinterpreted as a search for leptoquarks. In addition to the existing interpretation for scalar (spin-0) leptoquarks, we here look at vector (spin-1) leptoquarks using data taken by the ATLAS detector.