N* Photoexcitation Results from Mainz

Sokhoyan, V.

doi:10.1007/s00601-018-1440-5

Cited by 2 publications

(5 citation statements)

References 52 publications

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“…As already noted, this task has been undertaken for many flavour-SU (3) baryons using the quark-diquark approximation [30,31], although the diquark-content predictions have not been fully tested. Such analyses should be completed and also extended to flavour-SU (5).…”

Section: Discussionmentioning

confidence: 99%

“…3 supports the following 24 distinct flavour-SU (5) combinations for 1/2 + baryons. 5] a [13,17]    , (B.5b) 6] a [14,18] [3,8] a [14,21]    , (B.5g) [4,7] a [15,19]    , (B.5j) [4,9] a [15,22]    , (B.5l) [3,4] s 10 a [14,15]    , (B.5p) [8,9] s 10 a [21,22]    , (B.5t)…”

Section: /2 + Spin-flavour Combinationsmentioning

confidence: 99%

“…s 1 s [2,5] a [13,17]    , (B.5b) [3,6] a [14,18]    , (B.5e) [3,8] a [14,21]    , (B.5g) [4,7] a [15,19]    , (B.5j) [4,9] a [15,22]    , (B.5l)…”

Section: Appendix B: Elements In the Faddeev Equationsmentioning

confidence: 99%

“…[1].) This challenge has been accepted, with an array of dedicated experiments underway, at facilities worldwide, which seek to detect the missing states [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Masses of ground-state mesons and baryons, including those with heavy quarks

et al. 2019

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Using a confining, symmetry-preserving regularisation of a vector×vector contact interaction, we compute the spectra of ground-state pseudoscalar and vector (fḡ) mesons, scalar and axial-vector (f g) diquarks, and J P = 1/2 + , 3/2 + (f gh) baryons, where f, g, h ∈ {u, d, s, c, b}. The diquark correlations are essentially dynamical and play a key role in formulating and solving the threevalence-quark baryon problems. The baryon spectrum obtained from this largely-algebraic approach reproduces the 22 known experimental masses with an accuracy of 2.9(2.4)%. It also possesses the richness of states typical of constituent-quark models, predicting many heavy-quark baryons not yet observed. This study indicates that diquark correlations are an important component of all baryons; and owing to the dynamical character of the diquarks, it is typically the lightest allowed diquark correlation which defines the most important component of a baryon's Faddeev amplitude. *

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Section: Discussionmentioning

confidence: 99%

Section: /2 + Spin-flavour Combinationsmentioning

confidence: 99%

Section: Appendix B: Elements In the Faddeev Equationsmentioning

confidence: 99%

“…[1].) This challenge has been accepted, with an array of dedicated experiments underway, at facilities worldwide, which seek to detect the missing states [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Masses of ground-state mesons and baryons, including those with heavy quarks

et al. 2019

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“…Quark potential models based on three flavours of light quark -u, d, s [7][8][9] can describe the known spectrum of ground-state flavour-SU (3) octet and decuplet baryons [10]. They also predict many related excited states; a feature which initiated a widespread international search for such systems [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. The search is still underway because only a small percentage of the predicted states have thus far been found.…”

Section: Introductionmentioning

confidence: 99%

Spectrum and structure of octet and decuplet baryons and their positive-parity excitations

et al. 2019

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A continuum approach to the three valence-quark bound-state problem in quantum field theory, employing parametrisations of the necessary kernel elements, is used to compute the spectrum and Poincaré-covariant wave functions for all flavour-SU (3) octet and decuplet baryons and their first positive-parity excitations. Such analyses predict the existence of nonpointlike, dynamical quarkquark (diquark) correlations within all baryons; and a uniformly sound description of the systems studied is obtained by retaining flavour-antitriplet-scalar and flavour-sextet-pseudovector diquarks. Thus constituted, the rest-frame wave function of every system studied is primarily S-wave in character; and the first positive-parity excitation of each octet or decuplet baryon exhibits the characteristics of a radial excitation. Importantly, every ground-state octet and decuplet baryon possesses a radial excitation. Hence, the analysis predicts the existence of positive-parity excitations of the Ξ, Ξ * , Ω baryons, with masses, respectively (in GeV): 1.84(08), 1.89(04), 2.05(02). These states have not yet been empirically identified. This body of analysis suggests that the expression of emergent mass generation is the same in all u, d, s baryons and, notably, that dynamical quarkquark correlations play an essential role in the structure of each one. It also provides the basis for developing an array of predictions that can be tested in new generation experiments.

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N* Photoexcitation Results from Mainz

Cited by 2 publications

References 52 publications

Masses of ground-state mesons and baryons, including those with heavy quarks

Masses of ground-state mesons and baryons, including those with heavy quarks

Spectrum and structure of octet and decuplet baryons and their positive-parity excitations

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