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B0s lifetime measurement in the CP-odd decay channel B0s→J/ψ f0(980)

The lifetime of the Bs0 meson is measured in the decay channel Bs0→J /ψ π+π- with 880 ≤Mπ+π-≤1080 MeV /c2 , which is mainly a C P -odd state and dominated by the f0(980 ) resonance. In 10.4 fb-1 of data collected with the D0 detector in Run II of the Tevatron, the lifetime of the Bs0 meson is measured to be τ (Bs0)=1.70 ±0.14 (stat ) ±0.05 (syst) ps . Neglecting C P violation in Bs0/B¯s0 mixing, the measurement can be translated into the width of the heavy mass eigenstate of the Bs0, ΓH=0.59 ±0.05 (stat ) ±0.02 (syst ) ps-1 .

Physical Review D, 94, Issue 1, 012001, 2016

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Authors: 
P. Baringer*, A. Bean*, G. Chen*, J. Clutter*, J. Sekaric*, G.W. Wilson* and the D0 Collaboration * KU Authors