Observation of $$ {\Lambda}_b^0 $$ → D+pπ−π− and $$ {\Lambda}_b^0 $$ → D*+pπ−π− decays
نویسندگان
چکیده
Abstract The multihadron decays $$ {\Lambda}_b^0 Λ b 0 → D + pπ−π− and * are observed in data corresponding to an integrated luminosity of 3 fb − 1 , collected proton-proton collisions at centre-of-mass energies 7 8 TeV by the LHCb detector. Using decay {\Lambda}_c^{+} c + π as a normalisation channel, ratio branching fractions is measured be \frac{\mathcal{B}\left({\Lambda}_b^0\to {D}^{+}p{\pi}^{-}{\pi}^{-}\right)}{\mathcal{B}\left({\Lambda}_b^0\to {\Lambda}_c^0{\pi}^{+}{\pi}^{-}{\pi}^{-}\right)}\times \frac{\mathcal{B}\left({D}^{+}\to {K}^{-}{\pi}^{+}{\pi}^{+}\right)}{\mathcal{B}\left({\Lambda}_c^0\to {pK}^{-}{\pi}^{-}\right)}=\left(5.35\pm 0.21\pm 0.16\right)\%, B → D p π − × K pK = 5.35 ± 0.21 0.16 % , where first uncertainty statistical second systematic. for *+ pπ found {D}^{\ast +}p{\pi}^{-}{\pi}^{-}\right)}{\mathcal{B}\left({\Lambda}_b^0\to {D}^{+}p{\pi}^{-}{\pi}^{-}\right)}\times \left(\mathcal{B}\left({D}^{\ast +}\to {D}^{+}{\pi}^0\right)+\mathcal{B}\left({D}^{\ast {D}^{+}\gamma \right)\right)=\left(61.3\pm 4.3\pm 4.0\right)\%. ∗ γ 61.3 4.3 4.0 .
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2022
ISSN: ['1127-2236', '1126-6708', '1029-8479']
DOI: https://doi.org/10.1007/jhep03(2022)153