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Títol: Amplitude analysis of the D + → π − π + π + decay and measurement of the π − π + S-wave amplitude
Autor: Alfonso Albero, Alejandro
Garcia Moreno, Paula
Garrido Beltrán, Lluís
Gironella Gironell, Pere
Gomez Fernandez, Sergio
Graugés Pous, Eugeni
Lobo Salvia, Aniol
Marin Benito, Carla
Mauricio Ferre, Joan
Vazquez Gomez, Ricardo
LHCb Collaboration
Matèria: Física de partícules
Hadrons
Particle physics
Hadrons
Data de publicació: 2023
Publicat per: Springer Verlag
Resum: An amplitude analysis of the D+ → π −π +π + decay is performed with a sample corresponding to 1.5 fb−1 of integrated luminosity of pp collisions at a centre-of-mass energy √ s = 8 TeV collected by the LHCb detector in 2012. The sample contains approximately six hundred thousand candidates with a signal purity of 95%. The resonant structure is studied through a fit to the Dalitz plot where the π −π + S-wave amplitude is extracted as a function of π −π + mass, and spin-1 and spin-2 resonances are included coherently through an isobar model. The S-wave component is found to be dominant, followed by the ρ(770)0π + and f2(1270)π + components. A small contribution from the ω(782) → π −π + decay is seen for the first time in the D+ → π −π +π + decay. 
Nota: Reproducció del document publicat a: https://doi.org/10.1007/JHEP06(2023)044
És part de: Journal of High Energy Physics, 2023, vol. 2023, num.44
URI: https://hdl.handle.net/2445/221430
Recurs relacionat: https://doi.org/10.1007/JHEP06(2023)044
ISSN: 1126-6708
Apareix en les col·leccions:Articles publicats en revistes (Física Quàntica i Astrofísica)

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