Tetraquark cusp effects from diquark pair production

Samuel H. Blitz, Richard Lebed

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

We present the first study of the cusp effect (the movement of resonant poles due to the proximity of multiparticle thresholds) caused by the creation of diquark-antidiquark pairs. The cusp profile for such states is obtained from constituent counting rules. We compare the effectiveness of diquark cusps in moving resonant poles with that from a phenomenological form commonly used for meson-pair creation and find that mesons tend to be more effective at lower energies (e.g., the KK¯ threshold), while diquarks tend to be more effective at the charm [X(3872)] scales and above.

Original languageEnglish (US)
Article number094025
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume91
Issue number9
DOIs
StatePublished - May 22 2015

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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