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Search for the decay $B^0_s\to\overline{D}^0f_0(980)$

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Abstract

A search for $B_s^0 \to \overline{D}^{0} f_{0}(980)$ decays is performed using $3.0\, {\rm fb}^{-1}$ of $pp$ collision data recorded by the LHCb experiment during 2011 and 2012. The $f_{0}(980)$ meson is reconstructed through its decay to the $\pi^{+}\pi^{-}$ final state in the mass window $900\, {\rm MeV}/c^{2} < m(\pi^{+}\pi^{-}) < 1080\, {\rm MeV}/c^{2}$. No significant signal is observed. The first upper limits on the branching fraction of $\mathcal{B}(B_s^0 \to \overline{D}^{0} f_{0}(980)) < 3.1\,(3.4) \times 10^{-6}$ are set at $90\,\%$ ($95\,\%$) confidence level.

Figures and captions

Invariant mass distribution of candidates in the $\overline{ D }{} {}^0 \pi ^+ \pi ^- $ data sample with fit results overlaid, shown on a logarithmic scale. The components are as detailed in the legend. The labels (a) to (e) show the NN bins with increasing purity. The NN binning scheme is described in Sec. 4.

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Invariant mass distribution of candidates in the $\overline{ D }{} {}^0 f_0(980)$ data sample with fit results overlaid, shown on a logarithmic scale. The components are as detailed in the legend. The labels (a) to (e) show the NN bins with increasing purity. The NN binning scheme is described in Sec. 4.

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Tables and captions

Yields from the fit to the $\overline{ D }{} {}^0 \pi ^+ \pi ^- $ and $\overline{ D }{} {}^0 f_0(980)$ samples.

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Summary of systematic uncertainties on the ratio of branching fractions.

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Results for branching fractions for $ B ^0_{( s )} \rightarrow \overline{ D }{} {}^0 f_0(500)$ and $ B ^0_{( s )} \rightarrow \overline{ D }{} {}^0 f_0(980)$ decays. All quoted results correspond to branching fraction for $f_0 \rightarrow \pi ^+ \pi ^- $ of $100\,\%$. There is no experimental result for ${\cal B}( B ^0_ s \rightarrow \overline{ D }{} {}^0 f_0(500))$.

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Supplementary Material [file]

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Created on 09 December 2018.Citation count from INSPIRE on 18 December 2018.