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Title: Hybridized tetraquarks

In this study, we propose a new interpretation of the neutral and charged X,Z exotic hadron resonances. Hybridized-tetraquarks are neither purely compact tetraquark states nor bound or loosely bound molecules. The latter would require a negative or zero binding energy whose counterpart in h-tetraquarks is a positive quantity. The formation mechanism of this new class of hadrons is inspired by that of Feshbach metastable states in atomic physics. The recent claim of an exotic resonance in the B 0 s π ± channel by the D0 collaboration and the negative result presented subsequently by the LHCb collaboration are understood in this scheme, together with a considerable portion of available data on X, Z particles. Considerations on a state with the same quantum numbers as the X(5568) are also made.
 [1] ;  [2] ; ORCiD logo [3]
  1. Columbia Univ., New York, NY (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); INFN Sezione di Roma, Roma (Italy)
  3. INFN Sezione di Roma, Roma (Italy); "Sapienza" Univ. di Roma, Roma (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
Publication Date:
Report Number(s):
JLAB-THY-16-2232; DOE/OR/23177-3780
Journal ID: ISSN 0370-2693; PII: S0370269316301757
Grant/Contract Number:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 11; Journal Issue: 02; Journal ID: ISSN 0370-2693
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; tetraquarks; exotic hadrons; Feshbach resonances
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1252979