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  • 1602.07588v3.pd

    Rights statement: © 2016 American Physical Society

    Accepted author manuscript, 233 KB, PDF-document

    Available under license: CC BY: Creative Commons Attribution 4.0 International License

  • PhysRevLett.117.022003

    Rights statement: © 2016 American Physical Society

    Final published version, 321 KB, PDF-document

    Available under license: CC BY: Creative Commons Attribution 4.0 International License

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Evidence for a B0sπ± state

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  • D0 Collaboration
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Article number022003
<mark>Journal publication date</mark>7/07/2016
<mark>Journal</mark>Physical Review Letters
Issue number2
Volume117
Number of pages8
StatePublished
Original languageEnglish

Abstract

We report evidence for a narrow structure, X(5568), in the decay sequence X(5568)→B0sπ±, B0s→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)+0.9−1.9(syst)  MeV/c2 and Γ=21.9±6.4(stat)+5.0−2.5(syst)  MeV/c2. If the decay is X(5568)→B∗sπ±→B0sγπ± with an unseen γ, m(X(5568)) will be shifted up by m(B∗s)−m(B0s)∼49  MeV/c2. This measurement is based on 10.4  fb−1 of pp¯ collision data at s√=1.96  TeV collected by the D0 experiment at the Fermilab Tevatron collider.

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© 2016 American Physical Society