Fully open-flavor tetraquark states $$bc\bar{q}\bar{s}$$ and $$sc\bar{q}\bar{b}$$ with $$J^{P}=0^{+},1^{+}$$

Wang, Qi-Nan; Chen, Wei

doi:10.1140/epjc/s10052-020-7938-2

Cited by 23 publications

(22 citation statements)

References 37 publications

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“…The discovery of the T ++ cc inspired many related studies [33][34][35][36][37][38][39][40][41]. Actually, the doubly heavy tetraquarks have been studied extensively in the literature, with models like the quark model [1,, QCD sum rules [69][70][71][72][73][74][75][76], Lattice QCD [77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95], the OBE potentials [32,[96][97][98], chiral perturbation theory [99][100][101], etc. The studies suggest that the masses of some of the doubly heavy tetraquarks are lighter than the thresholds of two mesons, which makes them stable against the strong and electromagnetic decays.…”

Section: Introductionmentioning

confidence: 99%

Masses of doubly heavy-quark baryons in an extended chromomagnetic model

2018

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We extend the chromomagnetic model by further considering the effect of color interaction. The effective mass parameters between quark pairs (m qq or m qq ) are introduced to account for both the effective quark masses and the color interaction between the two quarks. Using the experimental masses of hadrons, the quark pair parameters are determined between the light quark pairs and the light-heavy quark pairs. Then the parameters of heavy quark pairs (cc, cb, bb) are estimated based on simple quark model assumption. We calculate all masses of doubly and triply heavy-quark baryons. The newly discovered doubly charmed baryon Ξ cc fits into the model with an error of 12 MeV.

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Section: Introductionmentioning

confidence: 99%

Masses of doubly heavy-quark baryons in an extended chromomagnetic model

2018

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“…Sufficient amount of work has been done since then to test the WCCC for overcharging/overspinning of black hole in various frameworks; [see, e.g. [22][23][24][25][26][27][28][29][30][31][32]. It is worth noting that in the above extensive body of work, the higher order and backreaction effects were ignored.…”

Section: Introductionmentioning

confidence: 99%

Testing the weak cosmic censorship conjecture for a Reissner–Nordström–de Sitter black hole surrounded by perfect fluid dark matter

2021

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In this paper, we test the weak cosmic censorship conjecture (WCCC) for the Reissner–Nordström–de Sitter (RN-dS) black hole surrounded by perfect fluid dark matter. We consider a spherically symmetric perturbation on deriving linear and non-linear order perturbation inequalities by applying a new version of gedanken experiments well accepted from the work of Sorce and Wald. Contrary to the well-known result that the Reissner–Nordström (RN) black hole could be overcharged under linear order particle accretion it is hereby shown that the same black hole in perfect fluid dark matter with cosmological parameter cannot be overcharged. Considering a realistic scenario in which black holes cannot be considered to be in vacuum we investigate the contribution of dark matter and cosmological constant in the overcharging process of an electrically charged black hole. We demonstrate that the black hole can be overcharged only when two fields induced by dark matter and cosmological parameter are completely balanced. Further we present a remarkable result that a black hole cannot be overcharged beyond a certain threshold limit for which the effect arising from the cosmological constant dominates over the effect by the perfect fluid dark matter. Thus even for a linear accretion process, the black hole cannot always be overcharged and hence obeys the WCCC in general. This result would continue to be fulfilled for non-linear order accretion.

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“…It is worth mentioning that these consistent theories share the black hole solutions with the original 4D EGB gravity that attracted a great deal of attention. For instance, the black hole solutions [103]- [111], quasinormal modes and stability analysis of black holes [112]- [118], thermodynamics and weak cosmic censorship [119]- [122], thin accretion disks [123]- [124], test particle motion and black hole shadow [125]- [131], gravitational lensing [132]- [135] and also some cosmological aspects of 4D EGB gravity [136]- [141] have been extensively studied. In this paper, we consider 4D EGB black holes surrounded by quintessence matter [142] to study the null geodesics around them and investigate the effects of the model parameters on these trajectories.…”

Section: Introductionmentioning

confidence: 99%

Null geodesics and shadow of 4$D$ Einstein-Gauss-Bonnet black holes surrounded by quintessence

Heydari-Fard,

Heydari-Fard

2021

Preprint

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We study the properties of the null geodesics of four-dimensional Einstein-Gauss-Bonnet black holes surrounded by quintessence matter. Due to the quintessence correction, we discuss the radial and non-radial geodesics. For the case of non-radial geodesics we obtain the effective potential, photon sphere and impact parameter associated to the null geodesics in details. We analyze the different possible orbits of massless particles (i.e. photons) such as unstable circular orbits and unbounded orbits and investigate the role of the Gauss-Bonnet coupling α and the quintessence parameter q on the null geodesic trajectories. Moreover, we study the effects of the model parameters on the shadow cast by such black holes. The results are compared to that of Schwarzschild black hole with and without quintessence matter and four-dimensional Einstein-Gauss-Bonnet black holes without quintessence. As a physical application of null geodesics, the deflection angle is calculated and the effect of the quintessence matter on it is investigated.

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Fully open-flavor tetraquark states $$bc\bar{q}\bar{s}$$ and $$sc\bar{q}\bar{b}$$ with $$J^{P}=0^{+},1^{+}$$

Cited by 23 publications

References 37 publications

Masses of doubly heavy-quark baryons in an extended chromomagnetic model

Masses of doubly heavy-quark baryons in an extended chromomagnetic model

Testing the weak cosmic censorship conjecture for a Reissner–Nordström–de Sitter black hole surrounded by perfect fluid dark matter

Null geodesics and shadow of 4$D$ Einstein-Gauss-Bonnet black holes surrounded by quintessence

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