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This content will become publicly available on August 18, 2015

Title: Predicting positive parity B$$_s$$ mesons from lattice QCD

We determine the spectrum of Bs 1P states using lattice QCD. For the Bs1(5830) and Bs2*(5840) mesons, the results are in good agreement with the experimental values. Two further mesons are expected in the quantum channels JP = 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 Bs(*)η and isospin-violating decays to Bs(*)π are negligible. We predict a JP = 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 mBs1=5.750(17)(19) GeV is predicted in the JP = 1+ channel. The results from our first principles calculation are compared to previous model-based estimates.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Univ. of Graz, Graz (Austria)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Univ. of Ljubljana, Ljubljana (Slovenia); Jozef Stefan Institute, Ljubljana (Slovenia)
  4. TRIUMF, Vancouver, BC (Canada)
Publication Date:
OSTI Identifier:
1212127
Report Number(s):
FERMILAB-PUB-15-002-T
Journal ID: ISSN 0370-2693; arXiv eprint number arXiv:1501.01646; TRN: US1601075
Grant/Contract Number:
AC02-07CH11359; De-AC02-07CH11359
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 750; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Hadron spectroscopy; lattice QCD; bottom-strange mesons