Heavy quark effective theory for charmed mesons

Physical Review Letters, 1994

Physical Review D, 2015

Inspired by the present experimental status of charmed-strange mesons, we perform a systematic study of the charmed-strange meson family, in which we calculate the mass spectra of the charmed-strange meson family by taking a screening effect into account in the Godfrey-Isgur model and investigate the corresponding strong decays via the quark pair creation model. These phenomenological analyses of charmed-strange mesons not only shed light on the features of the observed charmed-strange states, but also provide important information on future experimental search for the missing higher radial and orbital excitations in the charmed-strange meson family, which will be valuable task in LHCb, forthcoming BelleII and PANDA.

Physical Review D, 2004

Heavy-hadron chiral perturbation theory (HHχPT) is applied to the decays of the even-parity charmed strange mesons, D s0 (2317) and D s1 (2460). Heavy-quark spin symmetry predicts the branching fractions for the three electromagnetic decays of these states to the ground states D s and D * s in terms of a single parameter. The resulting predictions for two of the branching fractions are significantly higher than current upper limits from the CLEO experiment. Leading corrections to the branching ratios from chiral loop diagrams and spin-symmetry violating operators in the HHχPT Lagrangian can naturally account for this discrepancy. Finally the proposal that the D s0 (2317) (D s1 (2460)) is a hadronic bound state of a D (D *) meson and a kaon is considered. Leading order predictions for electromagnetic branching ratios in this molecular scenario are in very poor agreement with existing data.

The European Physical Journal A, 2021

2 (3000) 0 resonance states are analyzed in the heavy quark mass limit of Heavy Quark Effective Theory (HQET). The individual decay rates and the branching ratios among the strong decays determine their spin and parity. From such states the Regge trajectories are constructed in (J, M 2) and (nr, M 2) planes and further predict the masses of higher excited states (

Analysis of strong decays of charmed mesons D * 2 (2460), D 0 (2560), D 2 (2740), D 1 (3000), D * 2 (3000) and their spin partners D * 1 (2680), D * 3 (2760) and D * 0 (3000).

Proceedings of XXIX International Symposium on Lattice Field Theory — PoS(Lattice 2011)

We study the spectra of heavy-light and heavy-heavy mesons containing charm quarks, including higher spin states. We use two sets of N f = 2 + 1 gauge configurations, one set from QCDSF using the SLiNC action, and the other configurations from the Budapest-Marseille-Wuppertal collaboration, using the HEX smeared clover action. To extract information about the excited states, we choose a suitable basis of operators to implement the variational method.

2006

The orbitally excited charmed meson states, collectively referred to as D, are P-wave excitations of the quarkantiquark system involving one charm and one light quark. If we write the total angular momentum as~ J~ jq sQ;~ jq sq~ L, where~ L is the orbital angular momentum and Q q denotes the charm (light) quark, then in the heavy-quark limit mQ QCD the spin of the charm quark sQ decouples from the other degrees of freedom.

Physics Letters B, 2004

Using data from the FOCUS experiment we analyze the D + π − and D 0 π + invariant mass distributions. We measure the D * 0 2 mass M D * 0 2 = (2464.5 ± 1.1 ± 1.9) MeV/c 2 and width Γ D * 0 2

The European Physical Journal A, 2015

We study the so-called extended linear sigma model for the case of four quark flavors. This model is based on global chiral symmetry and dilatation invariance and includes, besides scalar and pseudoscalar mesons, vector and axial-vector mesons. Most of the parameters of the model have been determined in previous work by fitting properties of mesons with three quark flavors. Only three new parameters, all related to the current charm quark mass, appear when introducing charmed mesons. Surprisingly, within the accuracy expected from our approach, the masses of open charmed mesons turn out to be in quantitative agreement with experimental data. On the other hand, with the exception of J/ψ, the masses of charmonia are underpredicted by about 10%. It is remarkable that our approach correctly predicts (within errors) the mass splitting between spin-0 and spin-1 negative-parity open charm states. This indicates that, although the charm quark mass breaks chiral symmetry quite strongly explicitly, this symmetry still seems to have some influence on the properties of charmed mesons.

AIP Conference Proceedings, 1996

The possibility of using charm meson physics to test the Standard Model (SM) is reviewed. In the case of D 0 D 0 mixing, the SM contributions are carefully considered and the existence of a window for the observation of new physics is discussed. Some examples of extensions of the SM giving large mixing signals are presented. Finally, some distinctive aspects of CP violation and rare decays in charm mesons are discussed.