Article (Scientific journals)
X(5568) as a $su \bar d \bar b$ tetraquark in a simple quark model
Stancu, Floarea
2016In Journal of Physics. G, Nuclear and Particle Physics, 43, p. 105001(13
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Keywords :
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.
Disciplines :
Physics
Author, co-author :
Stancu, Floarea ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Language :
English
Title :
X(5568) as a $su \bar d \bar b$ tetraquark in a simple quark model
Publication date :
23 August 2016
Journal title :
Journal of Physics. G, Nuclear and Particle Physics
ISSN :
0954-3899
eISSN :
1361-6471
Publisher :
Institute of Physics, Bristol, United Kingdom
Volume :
43
Pages :
105001(13pp)
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 16 January 2017

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