Prediction of new $T_{cc}$ states of $D^{*} D^{*}$ and $D^{*}_s D^{*}$ molecular nature

Dai, L. R.; Molina, R.; Oset, E.

doi:10.48550/arxiv.2110.15270

Cited by 8 publications

(15 citation statements)

References 31 publications

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“…The width is of the order of 0.5 MeV. The smaller width of the state, similar to the case of the D * s D * versus D * D * found in [21], is due to the fact that in the decay diagrams of ). Once again, in Fig.…”

Section: A B * B Statessupporting

confidence: 59%

“…Changing q max from 400 MeV to 450 MeV causes an increase of the binding by about 9 MeV. These bindings, although small, are considerably bigger than those found for the analogous D * D * system in [21], of the order of 1 − 2 MeV. The width of the state is of the order of 8 MeV and the state becomes narrower as it approaches threshold, something already observed in [21], resulting from the general rule that the couplings of a bound state to its components go to zero as the binding goes to zero [64], which is generalized to coupled channels in [65,66].…”

Section: A B * B Statesmentioning

confidence: 73%

“…We work here in the isospin basis anticipating that the widths from BB and B * B will be of the order of a few MeV, as found in [21] for the D * D * system. In the unitary normalization suited for identical particles the states are…”

Section: B B * B Systemmentioning

confidence: 99%

“…While many studies had been done on doubly heavy meson states (see recent review in [3] and references in [4]) the small binding of around 360 keV and small width of about 48 keV were not anticipated, although a small binding energy had been predicted in [5,6]. The discovery has triggered many theoretical works, tuning parameters of the theory to obtain the right mass and in some cases the width also [4,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…The b quarks are then spectators in the interaction and the rules of heavy quark symmetry are automatically fulfilled. The approach has been often used, but concretely concerning exotic states with two open quarks, the approach was used in [48] to study an exotic D * K * bound state that could be identified with the recently discovered X(3866) meson [49] (see update in [50]), and also the D * D * system, where the D * D * state with I = 0, J P = 1 + and the D * s D * with I = 1 2 , J P = 1 + were found slightly bound (see update in [21]). The same approach has been used in the description of the T cc state in [4], where the width was predicted to be small, much smaller than the experimental one claimed in [4] before the analysis of [23], correcting for the experimental resolution, gave a width of the order of 40 keV.…”

Section: Introductionmentioning

confidence: 99%

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Masses and widths of the exotic molecular $B_{(s)}^{()} B_{(s)}^{()}$ states

Dai,

Oset,

Feijoo

et al. 2022

Preprint

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Section: A B * B Statessupporting

confidence: 59%

Section: A B * B Statesmentioning

confidence: 73%

Section: B B * B Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Masses and widths of the exotic molecular $B_{(s)}^{()} B_{(s)}^{()}$ states

Dai,

Oset,

Feijoo

et al. 2022

Preprint

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Double-charm heptaquark states composed of two charmed mesons and one nucleon

2022

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Inspired by the experimental discoveries of T cc , Σ c (2800), and Λ c (2940) and the theoretical picture where they are DD * , DN, and D * N molecular candidates, we investigate the double charm heptaquark system of DD * N. We employ the one-boson-exchange model to deduce the pairwise D-D * , D-N, and D * -N potentials and then study the DD * N system with the Gaussian expansion method. We find two good hadronic molecular candidates with) and 1 2 ( 3 2 − ) DD * N with only s-wave pairwise interactions. The conclusion remains unchanged even taking into account the S -D mixing and coupled channel effects. In addition to providing the binding energies, we also calculate the root-mean-square radii of the DD * N system, which further support the molecular nature of the predicted states. They can be searched for at the upcoming LHC run 3 and run 4.

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Possible molecular states of $$D^{()}D^{()}$$ and $$B^{()}B^{()}$$ within the Bethe–Salpeter framework

Liu

2022

Eur. Phys. J. C

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Recently the LHCb collaboration reported a new exotic state $$T^+_{cc}$$ T cc + which possesses $$cc\bar{u}\bar{d}$$ c c u ¯ d ¯ flavor structure. Since its mass is very close to the threshold of $$D^0D^{*+}$$ D 0 D ∗ + (or $$D^{*0}D^{+}$$ D ∗ 0 D + ) and its width is very narrow, it is inclined to conjecture that $$T^+_{cc}$$ T cc + is a molecular state of $$D^0D^{*+}$$ D 0 D ∗ + (or $$D^{*0}D^{+}$$ D ∗ 0 D + ). In this paper we study the possible molecular structures of $$D^{(*)}D^{(*)}$$ D ( ∗ ) D ( ∗ ) and $$B^{(*)}B^{(*)}$$ B ( ∗ ) B ( ∗ ) within the Bethe–Salpeter (B–S) framework. We employ one boson exchange model to stand the interaction kernels in the B–S equations. With reasonable input parameters we find the isospin eigenstate $$\frac{1}{\sqrt{2}}(D^0D^{*+}-D^{*0}D^{+})$$ 1 2 ( D 0 D ∗ + - D ∗ 0 D + ) ($$J^P=1^+$$ J P = 1 + ) constitutes a solution, which supports the ansatz of $$T^+_{cc}$$ T cc + being a molecular state of $$D^0D^{*+}$$ D 0 D ∗ + (or $$D^{*0}D^{+}$$ D ∗ 0 D + ). With the same parameters we also find that the isospin-1 state $$\frac{1}{\sqrt{2}}(D^{*0}D^{*+}+D^{*0}D^{*+})$$ 1 2 ( D ∗ 0 D ∗ + + D ∗ 0 D ∗ + ) ($$J^P=0^+$$ J P = 0 + ) can exist. Moreover, we also study the systems of $$B^{(*)}B^{(*)}$$ B ( ∗ ) B ( ∗ ) and their counterparts exist as possible molecular states. Consistency of theoretical computations based on such states with the data of the future experiments may consolidate the molecular structure of the exotic state $$T^+_{cc}$$ T cc + .

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Prediction of new $T_{cc}$ states of $D^{} D^{}$ and $D^{}_s D^{}$ molecular nature

Cited by 8 publications

References 31 publications

Masses and widths of the exotic molecular $B_{(s)}^{()} B_{(s)}^{()}$ states

Masses and widths of the exotic molecular $B_{(s)}^{()} B_{(s)}^{()}$ states

Double-charm heptaquark states composed of two charmed mesons and one nucleon

Possible molecular states of $$D^{()}D^{()}$$ and $$B^{()}B^{()}$$ within the Bethe–Salpeter framework

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Prediction of new $T_{cc}$ states of $D^{*} D^{*}$ and $D^{*}_s D^{*}$ molecular nature

Cited by 8 publications

References 31 publications

Masses and widths of the exotic molecular $B_{(s)}^{(*)} B_{(s)}^{(*)}$ states

Masses and widths of the exotic molecular $B_{(s)}^{(*)} B_{(s)}^{(*)}$ states

Double-charm heptaquark states composed of two charmed mesons and one nucleon

Possible molecular states of $$D^{(*)}D^{(*)}$$ and $$B^{(*)}B^{(*)}$$ within the Bethe–Salpeter framework

Contact Info

Product

Resources

About

Prediction of new $T_{cc}$ states of $D^{} D^{}$ and $D^{}_s D^{}$ molecular nature

Masses and widths of the exotic molecular $B_{(s)}^{()} B_{(s)}^{()}$ states

Masses and widths of the exotic molecular $B_{(s)}^{()} B_{(s)}^{()}$ states

Possible molecular states of $$D^{()}D^{()}$$ and $$B^{()}B^{()}$$ within the Bethe–Salpeter framework