Measurement of the quasi free $np \to np\pi^+\pi^-$ and $np \to pp\pi^-\pi^0$ reactions at 1.25 GeV With HADES - INSPIRE

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Measurement of the quasi free $np \to np\pi^+\pi^-$ and $np \to pp\pi^-\pi^0$ reactions at 1.25 GeV With HADES

HADES

Collaboration

•

A. Kurilkin
(
- Dubna, JINR
)

2014

4 pages

Part of Proceedings, 13th International Workshop on Meson Production, Properties and Interaction (MESON2014) : Cracow, Poland, May 29-June 03, 2014

Published in:

EPJ Web Conf. 81 (2014) 02009

Contribution to:

- MESON 2014

Published: 2014

DOI:

10.1051/epjconf/20148102009

reference search1 citation

Citations per year

Abstract: (EDP Sciences)

We present the results of two-pion production in tagged quasi-free np collisions at a deutron incident beam energy of 1.25 GeV/c measured with the High-Acceptance Di-Electron Spectrometer (HADES) installed at GSI. The specific acceptance of HADES allowed for the first time to obtain high-precision data on pi^+pi^- and pi^-pi^0 production in np collisions in a region corresponding to large transverse momenta of the secondary particles. The obtained differential cross section data provide strong constraints on the production mechanisms and on the various baryon resonance contributions (DeltaDelta, N(1440), N(1520), Delta(1600)). The invariant mass and angular distributions from the np -> nppi^+pi ^-and np -> pppi^-pi^0 reactions are compared with different theoretical model predictions.

p n
pi nucleon
pi- nucleon
pi+ nucleon
HADES
two-pion
Delta(1600)
N(1440)
N(1520)
deuteron: beam

References(13)

Figures(0)

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