A study of the $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays
using 139\,fb$^{-1}$ of integrated luminosity collected with the ATLAS detector
from $\sqrt{s} = 13$\,TeV $pp$ collisions at the LHC is presented.
The ratios of the branching fractions of the two decays to the
branching fraction of $B_c^+\to J/\psi \pi^+$ decay channel are measured:
$\mathcal B(B_c^+\to J/\psi D_s^+)/\mathcal B(B_c^+\to J/\psi \pi^+) = 2.76\pm 0.33\pm 0.29\pm 0.16$,
$\mathcal B(B_c^+\to J/\psi D_s^{*+})/\mathcal B(B_c^+\to J/\psi \pi^+) = 5.33\pm0.61\pm 0.67\pm 0.32$.
Here the first error is statistical, the second is systematic, and the third is
due to uncertainty on the $D_s^+\to\phi(K^+ K^-)\pi^+$ decay branching fraction.
The ratio between the branching fractions of the two decays is found to be
$\mathcal B(B_c^+\to J/\psi D_s^{*+})/\mathcal B(B_c^+\to J/\psi D_s^+) = 1.93\pm0.24 \pm 0.09$.
For the $B_c^+\to J/\psi D_s^{*+}$ decay, the transverse polarisation fraction, $\Gamma_{\pm\pm}/\Gamma$, is measured
to be $0.70\pm0.10\pm 0.04$. The precision of the measurements exceeds that of
all previous studies of these decays.
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Measured values of $R_{D_s^+/\pi^+}$, $R_{D_s^{*+}/\pi^+}$, $R_{D_s^{*+}/D_s^+}$ ratios of branching fractions, fraction of transverse polarization $\Gamma_{\pm\pm}/\Gamma$ with their statistical uncertainties and...
Table 2
Results of Table 1.
10.17182/hepdata.126990.v1/t2
Parameters of the $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ signals obtained with the unbinned extended maximum-likelihood fit to the...
Table 3
Results of Table 2.
10.17182/hepdata.126990.v1/t3
Parameters of the $B_c^+\to J/\psi \pi^+$ signal obtained with the unbinned extended maximum-likelihood fit. Only the statistical uncertainties are included....
Table 4
Results of Table 3.
10.17182/hepdata.126990.v1/t4
Summary of the total efficiencies. Quoted uncertainties correspond to statistical uncertainties of the simulated samples used. For the $B_c^+\to J/\psi...
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When using this data, please cite the original publication:
ATLAS
Collaboration
(2022).
Study of $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector. JHEP 08 (2022) 087.
Study of $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector. HEPData (collection).
https://doi.org/10.17182/hepdata.126990
or, if you prefer, a specific version of the
record:
ATLAS
Collaboration
(2022).
Study of $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector (Version 1). HEPData (collection).
https://doi.org/10.17182/hepdata.126990.v1
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ATLAS
Collaboration
(2022).
“Table 1” of “Study of $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.126990.v1/t1
ATLAS
Collaboration
(2022).
“Table 2” of “Study of $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.126990.v1/t2
ATLAS
Collaboration
(2022).
“Table 3” of “Study of $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.126990.v1/t3
ATLAS
Collaboration
(2022).
“Table 4” of “Study of $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.126990.v1/t4
When using this data, please cite the original publication:
ATLAS
Collaboration
(2022).
Study of $B_c^+\to J/\psi D_s^+$ and $B_c^+\to J/\psi D_s^{*+}$ decays in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector. JHEP 08 (2022) 087.
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