The $Ω_{cc}$ resonances with negative parity in the chiral constituent quark model

Wang, Jin-Bao; Li, Gang; Deng, Cheng-Rong; An, Chun-Sheng; Xie, Ju-Jun

doi:10.48550/arxiv.2110.06408

Cited by 3 publications

(3 citation statements)

References 54 publications

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“…In 2017, the LHCb Collaboration reported the Ξ ++ cc in the Λ + c K − π + π + decay mode [173] and one year later in the Ξ + c π + decay mode [174]. Its mass is [175] m Ξ ++ cc = 3621.55 ± 0.23 (stat) ± 0.30 (syst) MeV, (10) and its lifetime [176] is τ = (2.56 ± 0.27) × 10 −13 s. (11) There have been extensive theoretical efforts to study the mass spectrum, the strong decay patterns, the electromagnetic properties, the life time and other properties of the doubly heavy baryon in different frameworks, such as the bag models [177,178,179,180], various quark models [181,182,183,184,185,108,77], Bethe-Salpeter equation [186], Born-Oppenheimer EFT [187,188], the Regge phenomenology [189,190], QCD sum rule [191,192,193,194,195,196,159], heavy diquark effective theory [197], and lattice QCD [131,145,146].…”

Section: Heavy Baryonsmentioning

confidence: 99%

Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules

Li¹,

Wang²,

Wang³

et al. 2022

Preprint

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Chiral symmetry and its spontaneous breaking play an important role both in the light hadron and heavy hadron systems. In this work, we shall review the investigations on the chiral corrections to the properties of the heavy mesons and baryons within the framework of the chiral perturbation theory (χPT). We will also review the scatterings of the light pseudoscalar mesons and heavy hadrons. Moreover, the modern nuclear force was built upon the chiral effective field theory (χEFT). In the past decades many new hadron states were observed experimentally. A large group of these states are near-threshold resonances, such as the charged charmoniumlike Z c and Z cs states, bottomoniumlike Z b states, hidden-charm pentaquark P c and P cs states and the doubly charmed T cc state etc. They are very good candidates of the loosely bound molecular states composed of a pair of charmed hadrons. The same chiral dynamics not only governs the nuclei and forms the deuteron, but also dictates the above shallow bound states or resonances. We will perform an extensive review on the progress on the heavy hadronic molecular states within the framework of χEFT.

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Section: Heavy Baryonsmentioning

confidence: 99%

Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules

Li¹,

Wang²,

Wang³

et al. 2022

Preprint

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“…And the INS model has also been considered to investigate on the S-wave hidden-and doublecharmed tetraquark states very recently [63]. On the other hand, the GBE interaction between a quark-antiquark pair in a multiquark system is often assumed to vanish [70][71][72][73].…”

Section: Effective Hamiltonianmentioning

confidence: 99%

Spectrum of the S-wave fully-heavy tetraquark states

Zhang

Wang

et al. 2022

Eur. Phys. J. C

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In present work, spectrum of the S-wave fully-heavy tetraquark states $$QQ\bar{Q}\bar{Q}$$ Q Q Q ¯ Q ¯ ($$Q=c,b$$ Q = c , b ), i.e., $$cc\bar{c}\bar{c}$$ c c c ¯ c ¯ , $$bb\bar{b}\bar{b}$$ b b b ¯ b ¯ , $$cc\bar{b}\bar{b}$$ c c b ¯ b ¯ /$$bb\bar{c}\bar{c}$$ b b c ¯ c ¯ , $$bc\bar{c}\bar{c}$$ b c c ¯ c ¯ / $$cc\bar{b}\bar{c}$$ c c b ¯ c ¯ , $$bb\bar{c}\bar{b}$$ b b c ¯ b ¯ /$$cb\bar{b}\bar{b}$$ c b b ¯ b ¯ , and $$bc\bar{b}\bar{c}$$ b c b ¯ c ¯ are systematically investigated within a nonrelativistic constituent quark model, in which the instanton-induced and one-gluon-exchange interactions are taken into account as the residual spin-dependent hyperfine interaction. Our results show that the states with $$cc\bar{c}\bar{c}$$ c c c ¯ c ¯ and $$bb\bar{b}\bar{b}$$ b b b ¯ b ¯ components could be located around 6500 MeV and 19,200 MeV, respectively. Based on our calculations, the new X(6900) state observed by LHCb may be not a ground $$cc\bar{c}\bar{c}$$ c c c ¯ c ¯ tetraquark state, while it could be an orbitally or radially excited state of $$cc\bar{c}\bar{c}$$ c c c ¯ c ¯ system. On the other hand, the recently reported X(6600) state by CMS and ATLAS can be explained as a ground $$cc\bar{c}\bar{c}$$ c c c ¯ c ¯ tetraquark state with spin-parity $$J^{PC} =0^{++}$$ J PC = 0 + + .

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“…And the INS model has also been considered to investigate on the S-wave hidden-and double-charmed tetraquark states very recently [62]. On the other hand, the GBE interaction between a quark-antiquark pair in a multiquark system is often assumed to vanish [69][70][71][72]. Here, for the hyperfine potential V hyp , we take into account the OGE or the INS interactions separately.…”

Section: Framework a Effective Hamiltonianmentioning

confidence: 99%