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This content will become publicly available on July 7, 2017

Title: Evidence for a $$B_s^0 \pi^\pm$$ state

Here, we report evidence for a narrow structure, X(5568), in the decay sequence X(5568)→$$B_s^0 \pi^\pm$$, B$_s^0$ →J/ψΦ, J/ψ→μ+μ-, Φ→K+K-. This is evidence for the first instance of a hadronic state with valence quarks of four different flavors. The mass and natural width of this state are measured to be m=5567.8±2.9(stat) $$+0.9\atop{-1.9}$$ (syst) MeV/c2 and Γ=21.9±6.4(stat)$$+5.0\atop{-2.5}$$ (syst) MeV/c2. If the decay is X(5568)→B$$*\atop{s}$$ π±→B$$0\atop{s}$$ γπ± with an unseen γ, m(X(5568)) will be shifted up by m(B$$*\atop{s}$$ )-m(B$$0\atop{s}$$)~49 MeV/c2. This measurement is based on 10.4 fb-1 of $$p\bar{p}$$ collision data at $$\sqrt{s}$$ =1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider.
Authors:
 [1]
  1. Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation). et al.
Publication Date:
OSTI Identifier:
1253582
Report Number(s):
FERMILAB-PUB--16-038-E; arXiv:1602.07588
Journal ID: ISSN 0031-9007; 1423301
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 2; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
D0 Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS