Tetraquarks, their masses and decays in QED2

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Abstract

Recent observations by Belle and BESIII of charged quarkonium-like resonances give new stimulus for theoretical investigation of exotic hadrons in general and heavy tetraquarks in particular. We use QED2, a confining theory, as a model for the masses and decays of tetraquarks. Here we discuss the states \( \left( {Q\overline{Q}q\overline{q}} \right) \) and \( \left( {QQ\overline{q}\overline{q}} \right) \) (and its anti-particle), where Q and q are two fermion flavors with masses M and m, so that M >m. Wethendiscussdecaymodesofthesestatesinto \( \left( {Q\overline{Q}} \right) \), \( \left( {q\overline{q}} \right) \), \( \left( {Q\overline{q}} \right) \), \( \left( {\overline{Q}q} \right) \). Itturns out that \( \left( {Q\overline{Q}q\overline{q}} \right) \) is stable, while \( \left( {QQ\overline{q}\overline{q}} \right) \) is not.

Keywords

Confinement Duality in Gauge Field Theories Solitons Monopoles and Instantons QCD 
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Copyright information

© SISSA, Trieste, Italy 2013

Authors and Affiliations

  1. 1.Department of Particle Physics and AstrophysicsWeizmann Institute of ScienceRehovotIsrael
  2. 2.School of Physics and Astronomy, Beverly and Raymond Sackler Faculty of Exact SciencesTel Aviv UniversityRamat AvivIsrael

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