Study of η and η' Photoproduction at MAMI
| Parent link: | Physical Review Letters: Scientific Journal.— , 1958- Vol. 118, iss. 21.— 2017.— [212001, 5 p.] |
|---|---|
| מחבר תאגידי: | |
| מחברים אחרים: | , , , |
| סיכום: | Title screen The reactions γp→ηp and γp→η′p are measured from their thresholds up to the center-of-mass energy W=1.96 GeV with the tagged-photon facilities at the Mainz Microtron, MAMI. Differential cross sections are obtained with unprecedented statistical accuracy, providing fine energy binning and full production-angle coverage. A strong cusp is observed in the total cross section for ηphotoproduction at the energies in the vicinity of the η′ threshold, W=1896 MeV (Eγ=1447 MeV). Within the framework of a revised ηMAID isobar model, the cusp, in connection with a steep rise of the η′ total cross section from its threshold, can only be explained by a strong coupling of the poorly known N(1895)1/2− state to both ηp and η′p. Including the new high-accuracy results in the ηMAIDfit to available η and η′ photoproduction data allows the determination of the N(1895)1/2− properties. Режим доступа: по договору с организацией-держателем ресурса |
| יצא לאור: |
2017
|
| נושאים: | |
| גישה מקוונת: | https://doi.org/10.1103/PhysRevLett.118.212001 |
| פורמט: | אלקטרוני Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=658141 |
| סיכום: | Title screen The reactions γp→ηp and γp→η′p are measured from their thresholds up to the center-of-mass energy W=1.96 GeV with the tagged-photon facilities at the Mainz Microtron, MAMI. Differential cross sections are obtained with unprecedented statistical accuracy, providing fine energy binning and full production-angle coverage. A strong cusp is observed in the total cross section for ηphotoproduction at the energies in the vicinity of the η′ threshold, W=1896 MeV (Eγ=1447 MeV). Within the framework of a revised ηMAID isobar model, the cusp, in connection with a steep rise of the η′ total cross section from its threshold, can only be explained by a strong coupling of the poorly known N(1895)1/2− state to both ηp and η′p. Including the new high-accuracy results in the ηMAIDfit to available η and η′ photoproduction data allows the determination of the N(1895)1/2− properties. Режим доступа: по договору с организацией-держателем ресурса |
|---|---|
| DOI: | 10.1103/PhysRevLett.118.212001 |