A mass inequality for the Ξ* and Θ+ pentaquarks

Marek Karliner*, Harry J. Lipkin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We derive an upper bound on the mass difference between the Ξ* and Θ+ pentaquarks which are the manifestly exotic members of the SU(3)f antidecuplet. The derivation is based on simple assumptions about SU(3)f symmetry breaking and uses the standard quantum mechanical variational method. The resulting rather robust bound is more than 20 MeV below the experimentally reported Ξ*+ mass difference, emphasizing the need for confirmation of the experimental mass values and placing strong constraints on quark models of the pentaquark structure.

Original languageEnglish
Pages (from-to)273-276
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
StatePublished - 5 Aug 2004


Dive into the research topics of 'A mass inequality for the Ξ* and Θ+ pentaquarks'. Together they form a unique fingerprint.

Cite this