Amplitude analysis of the D s + $$ {D}_s^{+} $$ → π−π+π+ decay
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13130_2023_Article_21416.pdf
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Author(s)
Aaij, R.
Abdelmotteleb, A. S. W.
Abellan Beteta, C.
Abudinén, F.
Ackernley, T.
Adeva, B.
Adinolfi, M.
Adlarson, P.
Afsharnia, H.
Agapopoulou, C.
Date Issued
July 26, 2023
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2023 Jul 26;2023(7):204
Version
Final published version
Abstract
Abstract
A Dalitz plot analysis of the
D
s
+
$$ {D}_s^{+} $$
→ π−π+π+ 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−1. The resonant structure of the decay is obtained using a quasi-model-independent partial-wave analysis, in which the π+π− 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
D
s
+
$$ {D}_s^{+} $$
→ ω(782)π+ channel in the
D
s
+
$$ {D}_s^{+} $$
→ π−π+π+ decay. The resonant structures of the
D
s
+
$$ {D}_s^{+} $$
→ π−π+π+ and D+ → π−π+π+ decays are compared, providing information about the mechanisms for the hadron formation in these decays.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP07(2023)204
