Study of b-hadron decays to $$ {\Lambda}_c^{+}{h}^{-}{h}^{\prime -} $$ final states

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Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F, Ackernley, T, Adefisoye, AA, Adeva, B, Adinolfi, M, Adlarson, P, Agapopoulou, C et al (show 1086 more authors) , Aidala, CA, Ajaltouni, Z, Akar, S, Akiba, K, Albicocco, P, Albrecht, J, Alessio, F, Alexander, M, Aliouche, Z, Alvarez Cartelle, P, Amalric, R, Amato, S, Amey, JL, Amhis, Y, An, L, Anderlini, L, Andersson, M, Andreianov, A, Andreola, P, Andreotti, M, Andreou, D, Anelli, A, Ao, D, Archilli, F, Argenton, M, Arguedas Cuendis, S, Artamonov, A, Artuso, M, Aslanides, E, Ataide Da Silva, R, Atzeni, M, Audurier, B, Bacher, D, Bachiller Perea, I, Bachmann, S, Bachmayer, M, Back, JJ, Baladron Rodriguez, P, Balagura, V, Baldini, W, Bao, H, Baptista de Souza Leite, J, Barbetti, M, Barbosa, IR, Barlow, RJ, Barnyakov, M, Barsuk, S, Barter, W, Bartolini, M, Bartz, J, Basels, JM, Bassi, G, Batsukh, B, Bay, A, Beck, A, Becker, M, Bedeschi, F, Bediaga, IB, Belin, S, Bellee, V, Belous, K, Belov, I, Belyaev, I, Benane, G, Bencivenni, 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Journal of High Energy Physics, 2024 (8). 132-. ISSN 1126-6708, 1029-8479

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title> <jats:p>Decays of <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {\Xi}_b^{-} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>b</mml:mi> <mml:mo>−</mml:mo> </mml:msubsup> </mml:math> </jats:alternatives> </jats:inline-formula> and <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {\Omega}_b^{-} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ω</mml:mi> <mml:mi>b</mml:mi> <mml:mo>−</mml:mo> </mml:msubsup> </mml:math> </jats:alternatives> </jats:inline-formula> baryons to <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {\Lambda}_c^{+}{h}^{-}{h}^{\prime -} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:msup> <mml:mi>h</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>h</mml:mi> <mml:mrow> <mml:mo>′</mml:mo> <mml:mo>−</mml:mo> </mml:mrow> </mml:msup> </mml:math> </jats:alternatives> </jats:inline-formula> final states, with <jats:italic>h</jats:italic> <jats:sup> <jats:italic>−</jats:italic> </jats:sup> <jats:italic>h</jats:italic> <jats:sup> <jats:italic>′−</jats:italic> </jats:sup> being <jats:italic>π</jats:italic> <jats:sup> <jats:italic>−</jats:italic> </jats:sup> <jats:italic>π</jats:italic> <jats:sup> <jats:italic>−</jats:italic> </jats:sup>, <jats:italic>K</jats:italic> <jats:sup> <jats:italic>−</jats:italic> </jats:sup> <jats:italic>π</jats:italic> <jats:sup> <jats:italic>−</jats:italic> </jats:sup> and <jats:italic>K</jats:italic> <jats:sup> <jats:italic>−</jats:italic> </jats:sup> <jats:italic>K</jats:italic> <jats:sup> <jats:italic>−</jats:italic> </jats:sup> meson pairs, are searched for using data collected with the LHCb detector. The data sample studied corresponds to an integrated luminosity of 8<jats:italic>.</jats:italic>7 fb<jats:sup> <jats:italic>−</jats:italic>1</jats:sup> of <jats:italic>pp</jats:italic> collisions collected at centre-of-mass energies <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ \sqrt{s} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> </jats:alternatives> </jats:inline-formula> = 7, 8 and 13 TeV. The products of the relative branching fractions and fragmentation fractions for each signal mode, relative to the <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {B}^{-}\to {\Lambda}_c^{+}\overline{p}{\pi}^{-} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>B</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mover> <mml:mi>p</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:math> </jats:alternatives> </jats:inline-formula> mode, are measured, with <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {\Xi}_b^{-}\to {\Lambda}_c^{+}{K}^{-}{\pi}^{-} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>b</mml:mi> <mml:mo>−</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:math> </jats:alternatives> </jats:inline-formula>, <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {\Xi}_b^{-}\to {\Lambda}_c^{+}{K}^{-}{K}^{-} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>b</mml:mi> <mml:mo>−</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:math> </jats:alternatives> </jats:inline-formula> and <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {\varOmega}_b^{-}\to {\Lambda}_c^{+}{K}^{-}{K}^{-} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ω</mml:mi> <mml:mi>b</mml:mi> <mml:mo>−</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:math> </jats:alternatives> </jats:inline-formula> decays being observed at over 5 <jats:italic>σ</jats:italic> significance. The <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {\Xi}_b^{-}\to {\Lambda}_c^{+}{K}^{-}{\pi}^{-} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>b</mml:mi> <mml:mo>−</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:math> </jats:alternatives> </jats:inline-formula> mode is also used to measure the <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {\Xi}_b^{-} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>b</mml:mi> <mml:mo>−</mml:mo> </mml:msubsup> </mml:math> </jats:alternatives> </jats:inline-formula> production asymmetry, which is found to be consistent with zero. In addition, the <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {B}^{-}\to {\Lambda}_c^{+}\overline{p}{K}^{-} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>B</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mover> <mml:mi>p</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:math> </jats:alternatives> </jats:inline-formula> decay is observed for the first time, and its branching fraction is measured relative to that of the <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {B}^{-}\to {\Lambda}_c^{+}\overline{p}{\pi}^{-} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>B</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mover> <mml:mi>p</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:math> </jats:alternatives> </jats:inline-formula> mode.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	4902 Mathematical Physics, 5107 Particle and High Energy Physics, 49 Mathematical Sciences, 51 Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	02 Sep 2024 07:32
Last Modified:	15 Mar 2025 03:20
DOI:	10.1007/jhep08(2024)132
Open Access URL:	https://link.springer.com/article/10.1007/JHEP08(2...
Related Websites:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3184181