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Delta (1232) Dalitz decay in proton-proton collisions at T=1.25 GeV measured with HADES at GSI
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SYSNO ASEP 0477319 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Delta (1232) Dalitz decay in proton-proton collisions at T=1.25 GeV measured with HADES at GSI Author(s) Adamczewski-Musch, J. (DE)
Arnold, O. (DE)
Atomssa, E. T. (FR)
Chlad, Lukáš (UJF-V) RID, ORCID, SAI
Kugler, Andrej (UJF-V) RID, ORCID, SAI
Rodriguez Ramos, Pablo (UJF-V)
Sobolev, Yuri, G. (UJF-V) ORCID
Svoboda, Ondřej (UJF-V) RID, ORCID, SAI
Tlustý, Pavel (UJF-V) ORCID, SAI
Wagner, Vladimír (UJF-V) RID, ORCID, SAINumber of authors 118 Article number 065205 Source Title Physical Review C. - : American Physical Society - ISSN 2469-9985
Roč. 95, č. 6 (2017)Number of pages 12 s. Publication form Print - P Language eng - English Country US - United States Keywords HADES collaboration ; heavy ion collisions ; Delta(1232) Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Nuclear physics R&D Projects GA13-06759S GA ČR - Czech Science Foundation (CSF) Institutional support UJF-V - RVO:61389005 UT WOS 000403072800010 EID SCOPUS 85020829323 DOI 10.1103/PhysRevC.95.065205 Annotation We report on the investigation of Delta(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(-). have been studied and compared with the partial-wave analysis of the hadronic pp pi(0) channel. They allow to access both Delta(+) -> p pi(0)( e(+) e(-) gamma) and Delta(+) -> pe(+) e(-) Dalitz decay channels. The perfect reconstruction of the well-known pi(0) Dalitz decay serves as a proof of the consistency of the analysis. The Delta Dalitz decay is identified for the first time and the sensitivity to N-Delta transition form factors is tested. The Delta (1232) Dalitz decay branching ratio is also determined for the first time. Our result is (4.19 +/- 0.62 syst. +/- 0.34 stat.) x 10(-5), albeit with some model dependence. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2018
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