Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 6, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP06(2023)044
Keywords
Charm Physics; Hadron-Hadron Scattering; Particle and Resonance Production
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An amplitude analysis of the D+-> (-)pi(+)pi(+) decay is performed using a sample of pp collisions at a centre-of-mass energy root s = 8 TeV collected by the LHCb detector in 2012, corresponding to an integrated luminosity of 1.5 fb(-1). The study reveals the resonant structure of the decay through a fit to the Dalitz plot, extracting the pi(-)pi(+) S-wave amplitude as a function of pi(-)pi(+) mass. The results show the dominance of the S-wave component, followed by the rho(770)(0)pi(+) and f(2)(1270)pi(+) components. Additionally, a small contribution from the omega(782) -> pi(-)pi(+) decay is observed for the first time in the D+-> pi(-)pi(+)pi(+) decay.
An amplitude analysis of the D+-> (-)pi(+)pi(+) decay is performed with a sample corresponding to 1.5 fb(-1) of integrated luminosity of pp collisions at a centre-of-mass energy root 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 pi(-)pi(+) S-wave amplitude is extracted as a function of pi(-)pi(+) 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 rho(770)(0)pi(+) and f(2)(1270)pi(+) components. A small contribution from the omega(782) -> pi(-)pi(+) decay is seen for the first time in the D+-> pi(-)pi(+)pi(+) decay.
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