2014/12/31 by Н. Акопов, The HERMES Collaboration, N. Akopov +117 · 3 citations
Physics and Astronomy · #Baryon #Deuterium #High-Energy Particle Collisions Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Pentaquark #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevd.91.057101
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 91(5) (American Physical Society)
openalex publication_date 2015/03/31 · arxiv created 2015/04/27 · arxiv updated 2015/04/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The earlier search at HERMES for narrow baryon states excited in quasireal photoproduction, decaying through the channel pKS0\ensuremath→p\ensuremathπ+\ensuremathπ^\ensuremath-, has been extended with improved decay-particle reconstruction, more advanced particle identification, and increased event samples. The structure observed earlier at an invariant mass of 1528 MeV shifts to 1522 MeV and the statistical significance drops to about 2\ensuremathσ for data taken with a deuterium target. The number of events above background is 68_\ensuremath-31+98(stat)\ifmmode±\else\textpm\fi13(sys). No such structure is observed in the hydrogen data set.