Tetraquarks as diquark–antidiquark bound systems

Monemzadeh, M.; Tazimi, N.; Sadeghi, P.

doi:10.1016/j.physletb.2014.12.001

Cited by 17 publications

(20 citation statements)

References 31 publications

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“…Choosing a regularization cutoff equal to non zero root of the diquark-antidiquark potential leads to smaller tetraquark masses which are shown with bold numbers in Table II, even with the same regularization cutoff the reported masses in Ref. [1] are different from our results.…”

contrasting

confidence: 83%

“…Clearly the reported results in Ref. [1] can not be trusted, because as it is shown in Table I, not only J = 0 states are not calculated correctly, they have reported the masses for non zero J states, like SĀ±AS √ 2 and AĀ, which cannot be obtained in this formalism. It is a serious challenge and the authors should clarify how this spin-independent formalism can distinguish different spin states and consequently the solution of spin-independent LS integral equation can predict the masses of tetraquarks with non zero total angular momentum.…”

mentioning

confidence: 87%

“…In Ref. [1] the authors have chosen the non-zero root of the potential as regularization cutoff and consequently the potential is fixed equal to zero for r ≥ r c . As we have shown in Table II clearly this cutoff is not high enough and in order to achieve the cutoff-independent results, converged with four significant digits, one needs to choose a cutoff at least equal to 5 GeV −1 .…”

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confidence: 99%

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Comment on “Tetraquarks as diquark–antidiquark bound systems”

Hadizadeh

2015

Eur. Phys. J. C

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The author argues that the calculated masses of heavy tetraquarks obtained by solution of the spin-independent homogeneous Lippmann-Schwinger integral equation in a diquark-antidiquark picture reported by M. Monemzadeh et al., Phys. Lett. B 741, 124 (2015), are incorrect. We have reexamined all of the published results and we believe that not only the reported tetraquark masses for states with zero total angular momentum are incorrect, the reported masses for states with non-zero total angular momentum are quite misleading, because these states cannot be predicted by a spin-independent formalism.

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confidence: 83%

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confidence: 87%

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confidence: 99%

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Comment on “Tetraquarks as diquark–antidiquark bound systems”

Hadizadeh

2015

Eur. Phys. J. C

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“…We made use of the potential coefficients proposed by Ebert et al We solved Lippmann-Schwinger equation numerically for charm diquark-antidiquark systems and found the eigenvalues to calculate the binding energies and masses of heavy tetraquarks with hidden charms [28].…”

Section: Resultsmentioning

confidence: 99%

Calculating Masses of Pentaquarks Composed of Baryons and Mesons

Monemzadeh

Tazimi

Babaghodrat

2016

Advances in High Energy Physics

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In this paper, we consider an exotic baryon (pentaquark) as a bound state of two-body systems composed of a baryon (nucleon) and a meson.We used a baryonmeson picture to reduce a complicated five-body problem to a simple two-body problems. The homogeneous Lippmann-Schwinger integral equation is solved in configuration space by using one-pion exchange potential. We calculate the masses of pentaquarks θ c (uuddc), θ b (uuddb)

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“…The main goal of the comment was to show it remains completely unclear, how the authors of Ref. [10] can discriminate between the masses of tetraquarks with axial-vector diquark content and different total angular momentum J in a spin-independent framework. Also it has been shown that the paper suffers from few computational issues, for instance their regularization cutoff is not high enough to achieve accurate results.…”

Section: Introductionmentioning

confidence: 99%

Heavy tetraquarks in the diquark–antidiquark picture

Hadizadeh

Khaledi-Nasab

2016

Physics Letters B

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The homogeneous Lippmann-Schwinger integral equation is solved in momentum space to calculate the masses of heavy tetraquarks with hidden charm and bottom. The tetraquark bound states are studied in the diquark-antidiquark picture as a two-body problem. A regularized form of the diquark-antidiquark potential is used to overcome the singularity of the confining potential at large distances or small momenta. Our numerical results indicate that the relativistic effect leads to a small reduction in the mass of heavy tetraquarks, which is less than 2 % for charm and less than 0.2 % for bottom tetraquarks. The calculated masses of heavy tetraquarks for 1s, 1p, 2s, 1d and 2p states are in good agreement with other theoretical calculations and experimental data. Our numerical analysis predict the masses of heavy tetraquarks for 3s, 2d and 3p states for the first time, and we are not aware of any other theoretical results or experimental data for these states.

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Tetraquarks as diquark–antidiquark bound systems

Cited by 17 publications

References 31 publications

Comment on “Tetraquarks as diquark–antidiquark bound systems”

Comment on “Tetraquarks as diquark–antidiquark bound systems”

Calculating Masses of Pentaquarks Composed of Baryons and Mesons

Heavy tetraquarks in the diquark–antidiquark picture

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