@article{16f8ab2e981440b0b545852006d6967b,
title = "Δ(1232) Dalitz decay in proton-proton collisions at T=1.25 GeV measured with HADES at GSI",
abstract = "We report on the investigation of Δ(1232) production and decay in proton-proton collisions at a kinetic energy of 1.25 GeV measured with HADES. Exclusive dilepton decay channels ppe+e- and ppe+e-γ have been studied and compared with the partial-wave analysis of the hadronic ppπ0 channel. They allow to access both Δ+→pπ0(e+e-γ) and Δ+→pe+e- Dalitz decay channels. The perfect reconstruction of the well-known π0 Dalitz decay serves as a proof of the consistency of the analysis. The Δ Dalitz decay is identified for the first time and the sensitivity to N-Δ transition form factors is tested. The Δ(1232) Dalitz decay branching ratio is also determined for the first time; our result is (4.19 ± 0.62 syst. ± 0.34 stat.) ×10-5, albeit with some model dependence.",
author = "{HADES Collaboration} and J. Adamczewski-Musch and O. Arnold and Atomssa, {E. T.} and C. Behnke and A. Belounnas and A. Belyaev and Berger-Chen, {J. C.} and J. Biernat and A. Blanco and C. Blume and M. B{\"o}hmer and P. Bordalo and S. Chernenko and L. Chlad and C. Deveaux and J. Dreyer and A. Dybczak and E. Epple and L. Fabbietti and O. Fateev and P. Filip and P. Finocchiaro and P. Fonte and C. Franco and J. Friese and I. Fr{\"o}hlich and T. Galatyuk and Garz{\'o}n, {J. A.} and R. Gernh{\"a}user and M. Golubeva and F. Guber and M. Gumberidze and S. Harabasz and T. Heinz and T. Hennino and S. Hlavac and C. H{\"o}hne and R. Holzmann and A. Ierusalimov and A. Ivashkin and B. K{\"a}mpfer and T. Karavicheva and B. Kardan and I. Koenig and W. Koenig and Kolb, {B. W.} and G. Korcyl and G. Kornakov and R. Kotte and W. K{\"u}hn",
note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",
year = "2017",
month = jun,
day = "12",
doi = "10.1103/PhysRevC.95.065205",
language = "English",
volume = "95",
journal = "Physical Review C",
issn = "2469-9985",
publisher = "American Physical Society",
number = "6",
}