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Researchers have discovered a new way to detect leptoquarks (LQs) at the Large Hadron Collider (LHC) by targeting lepton-induced processes. This method provides the most stringent constraints to date on certain types of LQs.

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Area of Science:

  • High Energy Physics
  • Particle Physics
  • Collider Physics

Background:

  • Proton collisions at the Large Hadron Collider (LHC) primarily involve quark and gluon interactions.
  • Protons are composed of not only quarks and gluons but also leptons, which are often overlooked in collision studies.

Purpose of the Study:

  • To explore and analyze lepton-induced processes at the LHC.
  • To present a comprehensive analysis of resonant single leptoquark (LQ) production.
  • To derive novel bounds on minimal scalar leptoquarks using LHC Run II data.

Main Methods:

  • Targeting lepton-quark interactions by selecting a lepton from one beam and a quark from the other.
  • Analyzing resonant single leptoquark production across various flavor combinations (electron/muon with up, down, strange, or charm quarks).
  • Deriving new constraints on leptoquarks based on LHC Run II data.

Main Results:

  • Established a method for studying lepton-induced processes at the LHC.
  • Derived novel bounds for minimal scalar leptoquarks, particularly for flavor combinations involving up or down quarks.
  • Achieved the most stringent constraints to date for specific leptoquark types.

Conclusions:

  • The proposed method offers a powerful new avenue for discovering leptoquarks at the LHC.
  • Future LHC runs hold significant potential for further exploration using this technique.
  • Recommends incorporating searches for single light lepton and single light-flavor jet signatures into the standard exotic searches at ATLAS and CMS.