Amplitude analysis of the $$ {\Lambda}_{\textrm{b}}^0\to {\textrm{pK}}^{-}\upgamma $$ decay



Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F, Ackernley, T, Adeva, B, Adinolfi, M, Adlarson, P, Agapopoulou, C, Aidala, CA
et al (show 1098 more authors) (2024) Amplitude analysis of the $$ {\Lambda}_{\textrm{b}}^0\to {\textrm{pK}}^{-}\upgamma $$ decay. Journal of High Energy Physics, 2024 (6). 98-. ISSN 1126-6708, 1029-8479

Access the full-text of this item by clicking on the Open Access link.

Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title> <jats:p>The resonant structure of the radiative decay <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {\Lambda}_b^0\to {pK}^{-}\gamma $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>b</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>pK</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:mi>γ</mml:mi> </mml:math> </jats:alternatives> </jats:inline-formula> in the region of proton-kaon invariant-mass up to 2.5 GeV/<jats:italic>c</jats:italic> <jats:sup>2</jats:sup> is studied using proton-proton collision data recorded at centre-of-mass energies of 7, 8, and 13 TeV collected with the LHCb detector, corresponding to a total integrated luminosity of 9 fb<jats:sup> <jats:italic>−</jats:italic>1</jats:sup>. Results are given in terms of fit and interference fractions between the different components contributing to this final state. Only Λ resonances decaying to <jats:italic>pK</jats:italic> <jats:sup> <jats:italic>−</jats:italic> </jats:sup> are found to be relevant, where the largest contributions stem from the Λ(1520), Λ(1600), Λ(1800), and Λ(1890) states.</jats:p>

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 4902 Mathematical Physics, 49 Mathematical Sciences, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 05 Aug 2024 09:42
Last Modified: 17 Mar 2025 18:22
DOI: 10.1007/jhep06(2024)098
Open Access URL: https://link.springer.com/content/pdf/10.1007/JHEP...
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3183321