Helicity-Dependent Cross Sections for the Photoproduction of π0 Pairs from Nucleons
| Parent link: | Physical Review Letters Vol. 125, iss. 6.— 2020.— [062001 , 6 p.] |
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| Erakunde egilea: | |
| Beste egile batzuk: | , , , , |
| Gaia: | 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 |
| Hizkuntza: | ingelesa |
| Argitaratua: |
2020
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| Gaiak: | |
| Sarrera elektronikoa: | https://doi.org/10.1103/PhysRevLett.125.062001 |
| Formatua: | Baliabide elektronikoa Liburu kapitulua |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664601 |
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| 200 | 1 | |a Helicity-Dependent Cross Sections for the Photoproduction of π0 Pairs from Nucleons |f M. Dieterle, L. Witthauer, A. I. Fiks (Fix) [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 47 tit.] | ||
| 330 | |a 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. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Physical Review Letters | ||
| 463 | |t Vol. 125, iss. 6 |v [062001 , 6 p.] |d 2020 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 701 | 0 | |a Dieterle |b M. |g Manuel | |
| 701 | 1 | |a Witthauer |b L. |g Lilian | |
| 701 | 1 | |a Fiks (Fix) |b A. I. |c Physicist |c Professor of Tomsk Polytechnic University, Doctor of Physical and Mathematical Sciences |f 1968- |g Alexander Ivanovich |3 (RuTPU)RU\TPU\pers\33830 |9 17419 | |
| 701 | 1 | |a Abt |b S. | |
| 701 | 1 | |a Achenbach |b P. |g Patrick | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Исследовательская школа физики высокоэнергетических процессов |c (2017- ) |3 (RuTPU)RU\TPU\col\23551 |
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| 856 | 4 | |u https://doi.org/10.1103/PhysRevLett.125.062001 | |
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