Predicting positive parity $B_s$ mesons from lattice QCD

Journal Article · Sun Nov 01 00:00:00 EDT 2015 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2015.08.038· OSTI ID:1212127

Lang, C. B.; Mohler, Daniel; Prelovsek, Sasa; Woloshyn, R. M.

We determine the spectrum of B_s 1P states using lattice QCD. For the B_s1(5830) and B_s2*(5840) mesons, the results are in good agreement with the experimental values. Two further mesons are expected in the quantum channels J^P = 0⁺ and 1⁺ near the BK and B*K thresholds. A combination of quark–antiquark and B(*) meson–Kaon interpolating fields are used to determine the mass of two QCD bound states below the B(*)K threshold, with the assumption that mixing with B_s^(*)η and isospin-violating decays to B_s^(*)π are negligible. We predict a J^P = 0⁺ bound state Bs0 with mass mBs0 = 5.711(13)(19) GeV. In addition, with further assumptions motivated theoretically by the heavy quark limit, a bound state with m_Bs1=5.750(17)(19) GeV is predicted in the J^P = 1⁺ channel. The results from our first principles calculation are compared to previous model-based estimates.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Grant/Contract Number: De-AC02-07CH11359; AC02-07CH11359
• OSTI ID: 1212127
• Alternate ID(s): OSTI ID: 1221223
• Report Number(s): FERMILAB-PUB-15-002-T; S0370269315006395; PII: S0370269315006395
• Journal Information: Physics Letters B, Journal Name: Physics Letters B Vol. 750 Journal Issue: C; ISSN 0370-2693
• Publisher: Elsevier
• Country of Publication: Netherlands
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Hadron spectroscopy
lattice QCD
bottom-strange mesons