Hadrons with c-s quark content: past, present and future

Prencipe, E.

doi:10.22323/1.238.0044

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…The low-lying excitations are generally in agreement with expectations from quark-potential models [3] with some notable exceptions: the lightest scalar, D s0 (2317), and axial vector, D s1 (2460), charm-strange mesons were expected to be broad and above the relevant strong-decay threshold (DK and D K respectively), but they were both observed to be narrow and below threshold. A number of possible explanations have been put forward [2,4]. On the other hand, the corresponding charm-light mesons, D 0 (2400) and D 1 (2430), were both observed, as expected, to be broad resonances.…”

Section: Jhep10(2016)011mentioning

confidence: 78%

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Coupled-channel Dπ, Dη and D s K ¯ $$ {D}_s\overline{K} $$ scattering from lattice QCD

Moir

Peardon

Ryan

et al. 2016

J. High Energ. Phys.

175

266

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We present the first lattice QCD study of coupled-channel Dπ, Dη and D sK scattering in isospin-1/2 in three partial waves. Using distillation, we compute matrices of correlation functions with bases of operators capable of resolving both meson and mesonmeson contributions to the spectrum. These correlation matrices are analysed using a variational approach to extract the finite-volume energy eigenstates. Utilising Lüscher's method and its extensions, we constrain scattering amplitudes in S, P and D-wave as a function of energy. By analytically continuing the scattering amplitudes to complex energies, we investigate the S-matrix singularities. Working at m π ≈ 391 MeV, we find a pole corresponding to a J P = 0 + near-threshold bound state with a large coupling to Dπ. We also find a deeply bound J P = 1 − state, and evidence for a J P = 2 + narrow resonance coupled predominantly to Dπ. Elastic Dπ scattering in the isospin-3/2 channel is studied and we find a weakly repulsive interaction in S-wave.

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Section: Jhep10(2016)011mentioning

confidence: 78%

“…4 In all of the parametrisations of the t-matrix we considered, we found what appeared to be an "extra level" in close proximity to both the Dη and D sK thresholds along 4 We reiterate that we did not consider the D π channel. with a rapid phase shift through 180 • in the Dπ channel.…”

Section: D-wavementioning

confidence: 81%

Coupled-channel Dπ, Dη and D s K ¯ $$ {D}_s\overline{K} $$ scattering from lattice QCD

Moir

Peardon

Ryan

et al. 2016

J. High Energ. Phys.

175

266

View full text Add to dashboard Cite

show abstract

“…Similarly, in the charm-light sector, states such as the D s0 (2317) ± and D s1 (2460) ± have been found to have much narrower widths than expected. For recent reviews of these topics see [4,5].…”

Section: Introductionmentioning

confidence: 99%

Towards radiative transitions in charmonium

O'Hara¹,

Ryan²,

Moir³

et al. 2017

Proceedings of 34th Annual International Symposium on Lattice Field Theory — PoS(LATTICE2016)

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We present preliminary calculations towards radiative transitions in charmonium using anisotropic N f = 2 + 1 dynamical ensembles generated by the Hadron Spectrum Collaboration. With the use of newer technologies we aim to investigate transitions between states, including potential exotic charmonium states, lying higher in the spectrum than in previous studies. A crucial ingredient in this work is the use of variationally optimised interpolating operators which allow for a reliable determination of the three-point correlation functions needed. Using these operators, we perform first calculations of relevant three-point correlation functions before discussing future directions.34th annual International Symposium on Lattice Field Theory

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Excited and exotic charmonium, D s and D meson spectra for two light quark masses from lattice QCD

Cheung

O'Hara

Moir

et al. 2016

J. High Energ. Phys.

144

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We present highly-excited charmonium, D s and D meson spectra from dynamical lattice QCD calculations with light quarks corresponding to M π ∼ 240 MeV and compare these to previous results with M π ∼ 400 MeV. Utilising the distillation framework, large bases of carefully constructed interpolating operators and a variational procedure, we extract and reliably identify the continuum spin of an extensive set of excited mesons. These include states with exotic quantum numbers which, along with a number with nonexotic quantum numbers, we identify as having excited gluonic degrees of freedom and interpret as hybrid mesons. Comparing the spectra at the two different M π , we find only a mild light-quark mass dependence and no change in the overall pattern of states.

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Hadrons with c-s quark content: past, present and future

Cited by 3 publications

References 13 publications

Coupled-channel Dπ, Dη and D s K ¯ $$ {D}_s\overline{K} $$ scattering from lattice QCD

Coupled-channel Dπ, Dη and D s K ¯ $$ {D}_s\overline{K} $$ scattering from lattice QCD

Towards radiative transitions in charmonium

Excited and exotic charmonium, D s and D meson spectra for two light quark masses from lattice QCD

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