Higher tetraquark particles
نویسندگان
چکیده
منابع مشابه
On tetraquark meson states
It is suggested that the narrow meson state seen in the the SELEX experiment is a (cs̄ss̄) tetraquark state. Characteristics of other possible tetraquarks formed out of c and s quarks and antiquarks are considered. SELEX experiment has reported [1] a puzzling narrow meson state at a mass of 2632.6± 1.6 MeV/c which decays preferentially to D s (cs̄) + η(548) rather than to D(cd̄)+K or D(cū)+K. In th...
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In this article, we take the point of view that the Ds(2700) be a tetraquark state, which consists of a scalar diquark and a vector antidiquark, and calculate its mass with the QCD sum rules. The numerical result indicates that the mass of the vector charmed tetraquark state is about MV = (3.75±0.18)GeV or MV = (3.71 ± 0.15)GeV from different sum rules, which is about 1GeV larger than the exper...
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Very recently, the D0 collaboration has reported the observation of a narrow structure, X(5568), in the decay process X(5568) → B sπ using the 10.4fb−1 data of pp̄ collision at √ s = 1.96 TeV. This structure is of great interest since it is the first hadronic state with four different valence quark flavors, b, s, u, d. In this work, we present a tetraquark interpretation of the X(5568). Based on...
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We study the manifestly exotic tetraquark D s0 cus̄d̄ and the scalar tetraquark f0 udūd̄ in SU(3)c anisotropic quenched lattice QCD. We adopt the O a -improved Wilson (clover) fermion at β 5 75 on 123 96 with renormalized anisotropy as at 4, and investigate the correlator of the four-quark (4Q) system, cus̄d̄, with various quark masses including the idealized SU(4) f case. For f0 udūd̄ etc., we only ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2008
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2008.09.038