The $\Lambda (1405)$ as a Hybrid

Abstract

Using the QCD Sum Rule Method, we estimate the mass of the lowest strange hybrid baryon with $I{J}^P=0(1/2{)}^{-}$. We find the mass is approximately that of the $\Lambda (1405)$, whose nature has been a puzzle for many decades. Possible tests of this result are discussed.

fourteen pages seven figures

References in corpus (9)

• Kaonic production of Lambda(1405) off deuteron target in chiral dynamics
• Nature of the axial-vector mesons from their Nc behavior within the chiral unitary approach
• Mixed Heavy Quark Hybrid Mesons, Decay Puzzles, and RHIC
• Properties of the Lambda(1405) Measured at CLAS
• Exotic Quark Structure of Lambda(1405) in QCD Sum Rule
• Lambda(1405) in chiral SU(3) dynamics
• Hybrid Charmonium and the $\rho -\pi$ Puzzle
• Flavor-singlet hybrid baryons may already have been discovered
• Light vector hybrid states via QCD sum rules

Cited by in corpus (9)

• Measurement of the Sigma pi photoproduction line shapes near the Lambda(1405)
• Review of the $\mathbf{\Lambda }$(1405): A curious case of a strange-ness resonance
• Determination of exotic hadron structure by constituent-counting rule for hard exclusive processes
• Mass predictions of triply heavy hybrid baryons via QCD sum rules
• The Lambda(1405) state in a chiral unitary approach with off-shell corrections to dimensional regularized loop functions
• Investigation of $qqqs\bar{q}$ pentaquarks in a chiral quark model
• The $\Lambda (1405)$ in resummed chiral effective field theory
• A possible interpretation of $\Lambda$ baryon spectrum with pentaquark components
• Baryons and baryoniums in the perspective of QCD sum rules