TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Jaimes Elles, S. J.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Rebollo De Miguel, M.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
AU  - Sanderswood, I.
PY  - 2023
DA  - 2023//
TI  - Amplitude analysis of the D+-> pi(-)pi(+)pi(+) decay and measurement of the pi(-)pi(+) S-wave amplitude
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 044
EP  - 28pp
VL  - 06
IS  - 6
PB  - Springer
KW  - Charm Physics
KW  - Hadron-Hadron Scattering
KW  - Particle and Resonance Production
AB  - 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.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2208.03300
UR  - https://doi.org/10.1007/JHEP06(2023)044
DO  - 10.1007/JHEP06(2023)044
LA  - English
N1  - WOS:001035565600001
ID  - LHCbCollaborationAaij_etal2023
ER  -