Observation of $${{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {\hspace{1.79993pt}\overline{\hspace{-1.79993pt}D}} {}^{(*)0}{{K} ^-} $$ and $${{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {{D} ^{*-}_{s}} $$ decays

Aaij, R; Abdelmotteleb, ASW; Beteta, CA; Abudinén, F; Ackernley, T; Adeva, B; Adinolfi, M; Adlarson, P; Agapopoulou, C; Aidala, CA; Ajaltouni, Z; Akar, S; Akiba, K; Albicocco, P; Albrecht, J; Alessio, F; Alexander, M; Albero, AA; Aliouche, Z; Cartelle, PA; Amalric, R; Amato, S; Amey, JL; Amhis, Y; An, L; Bacher, D; John, M; Malde, S; Wilkinson, G

Journal article

Observation of $${{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {\hspace{1.79993pt}\overline{\hspace{-1.79993pt}D}} {}^{()0}{{K} ^-} $$ and $${{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {{D} ^{-}_{s}} $$ decays

Abstract:: Abstract The decays $${{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {\hspace{1.79993pt}\overline{\hspace{-1.79993pt}D}} {}^{(*)0}{{K} ^-} $$ Λ b 0 → Λ c + D ¯ ( ∗ ) 0 K - and $${{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {{D} ^{*-}_{s}} $$ Λ b 0 → Λ c + D s ∗ - are observed for the first time, in proton-proton collision data at $$\sqrt{s} =13\text {Te\hspace{-1.00006pt}V} $$ s = 13 Te V , corresponding to an integrated luminosity of 5.4 $$\text {fb} ^{-1}$$ fb - 1 collected with the LHCb detector. Their ratios of branching fractions with respect to the $${{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {{D} ^-_{s}} $$ Λ b 0 → Λ c + D s - mode are measured to be $$\begin{aligned} \begin{aligned} \frac{\mathcal {B}\left( {{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {{\hspace{1.79993pt}\overline{\hspace{-1.79993pt}D}} {}^0} {{K} ^-} \right) }{\mathcal {B}\left( {{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {{D} ^-_{s}} \right) }&= 0.1908 {}_{-0.0034}^{+0.0036} {}_{-0.0018}^{+0.0016} \pm 0.0038,\\ \frac{\mathcal {B}\left( {{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {{\hspace{1.79993pt}\overline{\hspace{-1.79993pt}D}} {}^{*0}} {{K} ^-} \right) }{\mathcal {B}\left( {{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {{D} ^-_{s}} \right) }&= 0.589 {}_{-0.017}^{+0.018} {}_{-0.018}^{+0.017} \pm 0.012,\\ \frac{\mathcal {B}\left( {{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {{D} ^{*-}_{s}} \right) }{\mathcal {B}\left( {{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {{D} ^-_{s}} \right) }&= 1.668 \pm 0.022 {}_{-0.055}^{+0.061}, \end{aligned} \end{aligned}$$ B Λ b 0 → Λ c + D ¯ 0 K - B .

Publication status:: Published

Peer review status:: Peer reviewed

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APA Style

Aaij, R., Abdelmotteleb, A. S. W., Beteta, C. A., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Adlarson, P., Agapopoulou, C., Aidala, C. A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. A., Aliouche, Z., … Wilkinson, G. (2024). Observation of $${{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {\hspace{1.79993pt}\overline{\hspace{-1.79993pt}D}} {}^{(*)0}{{K} ^-} $$ and $${{\varLambda } ^0_{b}} \!\rightarrow {{\varLambda } ^+_{c}} {{D} ^{*-}_{s}} $$ decays. The European Physical Journal C, 84(6), 575.

MLA Style

Aaij, R, et al. “Observation of $${{\VarLambda } ^0_{b}} \!\Rightarrow {{\VarLambda } ^+_{c}} {\Hspace{1.79993pt}\Overline{\Hspace{-1.79993pt}D}} {}^{(*)0}{{K} ^-} $$ and $${{\VarLambda } ^0_{b}} \!\Rightarrow {{\VarLambda } ^+_{c}} {{D} ^{*-}_{s}} $$ Decays.” The European Physical Journal C, vol. 84, no. 6, 2024, p. 575.

Chicago Style

Aaij, R, ASW Abdelmotteleb, CA Beteta, et al. 2024. “Observation of $${{\VarLambda } ^0_{b}} \!\Rightarrow {{\VarLambda } ^+_{c}} {\Hspace{1.79993pt}\Overline{\Hspace{-1.79993pt}D}} {}^{(*)0}{{K} ^-} $$ and $${{\VarLambda } ^0_{b}} \!\Rightarrow {{\VarLambda } ^+_{c}} {{D} ^{*-}_{s}} $$ Decays.” The European Physical Journal C 84 (6): 575.
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