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https://hdl.handle.net/2445/221430
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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