Observation of and decays
R Aaij, ASW Abdelmotteleb, CA Beteta… - arXiv preprint arXiv …, 2023 - arxiv.org
R Aaij, ASW Abdelmotteleb, CA Beteta, F Abudinén, T Ackernley, B Adeva, M Adinolfi…
arXiv preprint arXiv:2310.13546, 2023•arxiv.orgThe $\Xi_b^ 0\rightarrow\Xi_c^+ D_s^-$ and $\Xi_b^-\rightarrow\Xi_c^ 0 D_s^-$ decays are
observed for the first time using proton-proton collision data collected by the LHCb
experiment at a centre-of-mass energy of $\sqrt {s}= 13\mathrm {TeV} $, corresponding to an
integrated luminosity of $5.1\mathrm {fb}^{-1} $. The relative branching fractions times the
beauty-baryon production cross-sections are measured to be\begin {align*}\mathcal {R}\left
(\frac {\Xi_b^ 0}{\Lambda_b^ 0}\right)\equiv\frac {\sigma\left (\Xi_b^ 0\right)}{\sigma\left …
observed for the first time using proton-proton collision data collected by the LHCb
experiment at a centre-of-mass energy of $\sqrt {s}= 13\mathrm {TeV} $, corresponding to an
integrated luminosity of $5.1\mathrm {fb}^{-1} $. The relative branching fractions times the
beauty-baryon production cross-sections are measured to be\begin {align*}\mathcal {R}\left
(\frac {\Xi_b^ 0}{\Lambda_b^ 0}\right)\equiv\frac {\sigma\left (\Xi_b^ 0\right)}{\sigma\left …
The and decays are observed for the first time using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of , corresponding to an integrated luminosity of . The relative branching fractions times the beauty-baryon production cross-sections are measured to be \begin{align*} \mathcal{R}\left(\frac{\Xi_b^0}{\Lambda_b^0}\right) \equiv \frac{\sigma\left(\Xi_b^0\right)}{\sigma\left(\Lambda_b^0\right)} \times \frac{\mathcal{B}\left(\Xi_b^0 \rightarrow \Xi_c^+ D_s^-\right)}{\mathcal{B}\left(\Lambda_b^0 \rightarrow \Lambda_c^0 D_s^-\right)} =(15.8\pm1.1\pm0.6\pm7.7)\%, \mathcal{R}\left(\frac{\Xi_b^-}{\Lambda_b^0}\right) \equiv \frac{\sigma\left(\Xi_b^-\right)}{\sigma\left(\Lambda_b^0\right)} \times \frac{\mathcal{B}\left(\Xi_b^- \rightarrow \Xi_c^0 D_s^-\right)}{\mathcal{B}\left(\Lambda_b^0 \rightarrow \Lambda_c^0 D_s^-\right)} =(16.9\pm1.3\pm0.9\pm4.3)\%, \end{align*} where the first uncertainties are statistical, the second systematic, and the third due to the uncertainties on the branching fractions of relevant charm-baryon decays. The masses of and baryons are measured to be $m_{\Xi_b^0}=5791.12\pm0.60\pm0.45\pm0.24\mathrm{MeV}/c^2$ and $m_{\Xi_b^-}=5797.02\pm0.63\pm0.49\pm0.29\mathrm{MeV}/c^2$, where the uncertainties are statistical, systematic, and those due to charm-hadron masses, respectively.
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