Amplitude analysis of the Ds+→ π−π+π+ decay

D. Brundu;F. Dettori;F. Fabiano;R. Litvinov;G. Manca;R. Oldeman;B. Saitta;J. Sun;
2023-01-01

Abstract

A Dalitz plot analysis of the Ds+ → 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 Ds+ → ω(782)π + channel in the Ds+ → π − π + π + decay. The resonant structures of the Ds+ → π − π + π + and D + → π − π + π + decays are compared, providing information about the mechanisms for the hadron formation in these decays.
2023
Inglese
2023
7
204
https://link.springer.com/article/10.1007/JHEP07(2023)204
Esperti anonimi
internazionale
scientifica
Charm Physics; Hadron-Hadron Scattering; Particle and Resonance Production
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudin??n, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou ...espandi
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
1071
open
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