Details

Autor(en) / Beteiligte

• Ortega, Pablo G.
• Segovia, Jorge
• Entem, David R.
• Fernández, Francisco

Titel

Threshold effects in P -wave bottom-strange mesons

Ist Teil von

• Physical review. D, 2017-02, Vol.95 (3), p.034010, Article 034010

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Using a nonrelativistic constituent quark model in which the degrees of freedom are quark-antiquark and meson-meson components, we have recently shown that the D(*)K thresholds play an important role in lowering the mass of the cs¯ states associated with the physical Ds0*(2317) and Ds1(2460) mesons. This observation is also supported by other theoretical approaches such as lattice-regularized QCD or chiral unitary theory in coupled channels. Herein, we extend our computation to the lowest P-wave Bs mesons, taking into account the corresponding JP=0+, 1+ and 2+ bottom-strange states predicted by the naive quark model and the BK and B*K thresholds. We assume that mixing with Bs(*)η and isospin-violating decays to Bs(*)π are negligible. This computation is important because there is no experimental data in the bs¯ sector for the equivalent jqP=1/2+ (Ds0*(2317), Ds1(2460)) heavy-quark multiplet and, as it has been seen in the cs¯ sector, the naive theoretical result can be wrong by more than 100 MeV. Our calculation allows us to introduce the coupling with the D-wave B*K channel and to compute the probabilities associated with the different Fock components of the physical state.