Amplitude analysis of the $$ {D}_s^{+} $$ → π−π+π+ decay



Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F, Ackernley, T, Adeva, B, Adinolfi, M, Adlarson, P, Afsharnia, H, Agapopoulou, C
et al (show 1061 more authors) (2023) Amplitude analysis of the $$ {D}_s^{+} $$ → π−π+π+ decay. Journal of High Energy Physics, 2023 (7). 204-.

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>A Dalitz plot analysis of the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {D}_s^{+} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>D</mml:mi> <mml:mi>s</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula> → <jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup><jats:italic>π</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup>+</jats:sup> decay is presented. The analysis is based on proton-proton collision data recorded by the LHCb experiment at a centre-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 1.5 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup>. The resonant structure of the decay is obtained using a quasi-model-independent partial-wave analysis, in which the <jats:italic>π</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup> S-wave amplitude is parameterised as a generic complex function determined by a fit to the data. The S-wave component is found to be dominant, followed by the contribution from spin-2 resonances and a small contribution from spin-1 resonances. The latter includes the first observation of the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {D}_s^{+} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>D</mml:mi> <mml:mi>s</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula><jats:italic>→ ω</jats:italic>(782)<jats:italic>π</jats:italic><jats:sup>+</jats:sup> channel in the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {D}_s^{+} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>D</mml:mi> <mml:mi>s</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula><jats:italic>→ π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup><jats:italic>π</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup>+</jats:sup> decay. The resonant structures of the <jats:inline-formula><jats:alternatives><jats:tex-math>$$ {D}_s^{+} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>D</mml:mi> <mml:mi>s</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula><jats:italic>→ π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup><jats:italic>π</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup>+</jats:sup> and <jats:italic>D</jats:italic><jats:sup>+</jats:sup><jats:italic>→ π</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup><jats:italic>π</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup>+</jats:sup> decays are compared, providing information about the mechanisms for the hadron formation in these decays.</jats:p>

Item Type: Article
Uncontrolled Keywords: Intellectual and Developmental Disabilities (IDD), Down Syndrome, Brain Disorders
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 30 Nov 2023 11:52
Last Modified: 06 Jun 2024 21:59
DOI: 10.1007/jhep07(2023)204
Open Access URL: https://link.springer.com/content/pdf/10.1007/JHEP...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3177092