Helicity-Dependent Cross Sections for the Photoproduction of π0 Pairs from Nucleons

Helicity-Dependent Cross Sections for the Photoproduction of π0 Pairs from Nucleons

Detalles Bibliográficos
Parent link:Physical Review Letters
Vol. 125, iss. 6.— 2020.— [062001 , 6 p.]
Autor Corporativo: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Outros autores: Dieterle M. Manuel, Witthauer L. Lilian, Fiks (Fix) A. I. Alexander Ivanovich, Abt S., Achenbach P. Patrick
Summary:Title screen
The double-polarization observable E and helicity-dependent cross sections σ1/2, σ3/2 have been measured for the photoproduction of π0 pairs off quasifree protons and neutrons at the Mainz MAMI accelerator with the Crystal Ball/TAPS setup. A circularly polarized photon beam was produced by bremsstrahlung from longitudinally polarized electrons and impinged on a longitudinally polarized deuterated butanol target. The reaction products were detected with an almost 4π covering calorimeter. The results reveal for the first time the helicity- and isospin-dependent structure of the γN→Nπ0π0 reaction. They are compared to predictions from reaction models in view of nucleon resonance contributions and also to a refit of one model that predicted results for the proton and for the neutron target. The comparison of the prediction and the refit demonstrates the large impact of the new data.
Режим доступа: по договору с организацией-держателем ресурса
Idioma:inglés
Publicado: 2020
Subjects:
электронный ресурс
труды учёных ТПУ
Acceso en liña:https://doi.org/10.1103/PhysRevLett.125.062001
Formato: Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664601

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