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

Abstract

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/c 2 and Γ=21.9±6.4(stat)$$+5.0\atop{-2.5}$$ (syst) MeV/c 2. 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/c 2. 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:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
D0 Collaboration
OSTI Identifier:
1253582
Alternate Identifier(s):
OSTI ID: 1260864
Report Number(s):
FERMILAB-PUB-16-038-E; arXiv:1602.07588
Journal ID: ISSN 0031-9007; 1423301; TRN: US1601715
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article: 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)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Abazov, V. M.. Evidence for a $B_s^0 \pi^\pm$ state. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.117.022003.
Abazov, V. M.. Evidence for a $B_s^0 \pi^\pm$ state. United States. doi:10.1103/PhysRevLett.117.022003.
Abazov, V. M.. Thu . "Evidence for a $B_s^0 \pi^\pm$ state". United States. doi:10.1103/PhysRevLett.117.022003. https://www.osti.gov/servlets/purl/1253582.
@article{osti_1253582,
title = {Evidence for a $B_s^0 \pi^\pm$ state},
author = {Abazov, V. M.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.117.022003},
journal = {Physical Review Letters},
number = 2,
volume = 117,
place = {United States},
year = {Thu Jul 07 00:00:00 EDT 2016},
month = {Thu Jul 07 00:00:00 EDT 2016}
}

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