Reference : X(5568) as a $su \bar d \bar b$ tetraquark in a simple quark model
 Document type : Scientific journals : Article Discipline(s) : Physical, chemical, mathematical & earth Sciences : Physics To cite this reference: http://hdl.handle.net/2268/205389
 Title : X(5568) as a $su \bar d \bar b$ tetraquark in a simple quark model Language : English Author, co-author : Stancu, Floarea [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >] Publication date : 23-Aug-2016 Journal title : Journal of Physics. G, Nuclear and Particle Physics Publisher : Institute of Physics Volume : 43 Pages : 105001(13pp) Peer reviewed : Yes (verified by ORBi) Audience : International ISSN : 0954-3899 City : Bristol Country : United Kingdom Keywords : [en] heavy-light tetraquarks ; chromomagnetic interaction ; effective quark masses Abstract : [en] The $S$-wave eigenstates of tetraquarks of type $s u \bar d \bar b$ with J$^{P}$ = 0$^{+}$, 1$^{+}$ and 2$^{+}$ are studied within a simple quark model with chromomagnetic interaction and effective quark masses extracted from meson and baryon spectra. It is tempting to see if this spectrum can accommodate the new narrow structure X(5568), observed by the D\O~~Collaboration, but not confirmed by the LHCb Collaboration. If it exists, such a tetraquark is a system with four different flavors and its study can improve our understanding of multiquark systems. The presently calculated mass of X(5568) agrees quite well with the experimental value of he D\O~~Collaboration. Predictions are also made for the spectrum of the charmed partner $s u \bar d \bar c$. However we are aware of the difficulty of extracting effective quark masses, from mesons and baryons, to be used in multiquark systems. Target : Researchers ; Professionals ; Students Permalink : http://hdl.handle.net/2268/205389 DOI : 10.1088/0954-3899/43/10/105001 Other URL : http://arXiv:1603.03322[hep-ph]

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