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Related Experiment Video

Updated: May 22, 2026

Visualizing the Interaction Between the Qdot-labeled Protein and Site-specifically Modified λ DNA at the Single Molecule Level
08:56

Visualizing the Interaction Between the Qdot-labeled Protein and Site-specifically Modified λ DNA at the Single Molecule Level

Published on: July 17, 2018

Isolating the Λ(1405) in lattice QCD.

Benjamin J Menadue1, Waseem Kamleh, Derek B Leinweber

  • 1Special Research Centre for the Subatomic Structure of Matter, School of Chemistry & Physics, University of Adelaide, South Australia 5005, Australia.

Physical Review Letters
|May 1, 2012
PubMed
Summary
This summary is machine-generated.

Researchers identified the unusual low mass of the Lambda (Λ) baryon

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Last Updated: May 22, 2026

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Published on: November 15, 2013

Area of Science:

  • Particle Physics
  • Quantum Chromodynamics (QCD)

Background:

  • The Lambda (Λ) baryon's odd-parity ground state has a surprisingly low mass (1405 MeV).
  • This mass is lower than the odd-parity ground-state nucleon, despite the Λ baryon containing a strange quark.

Purpose of the Study:

  • To isolate and study the elusive odd-parity ground state of the Λ baryon.
  • To determine if the calculated mass ordering matches experimental observations relative to scattering thresholds.

Main Methods:

  • Utilized (2+1)-flavor full-QCD ensembles from the PACS-CS collaboration.
  • Employed a variational analysis technique with source and sink smearing.
  • Used a partially quenched strange quark to achieve the correct kaon mass.

Main Results:

  • Successfully isolated the odd-parity Λ baryon state.
  • Reproduced the correct level ordering with respect to nearby scattering thresholds for the first time.
  • Observed a low-lying, odd-parity mass trend consistent with experimental values.

Conclusions:

  • The study confirms the surprisingly low mass of the odd-parity Λ baryon.
  • The findings align with experimental data, validating the computational methods used.
  • This research provides crucial insights into the properties of strange baryons within QCD.