Cargando…
The reaction $\pi^{−}p \to \pi^{-}\pi^{-}\pi^{+}p$: Development of the analysis methods and selected results
We present the description of the analysis methods and results of applying them to the exclusive diffractive reaction π−p → π−π−π+p of 50 · 106 events measured with COMPASS detector. The large statistics of π−π−π+ events enables the two-dimensional partial-wave analysis independently in 100 bins of...
| Autor principal: | |
|---|---|
| Lenguaje: | eng |
| Publicado: |
2016
|
| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1063/1.4938635 http://cds.cern.ch/record/2262535 |
| _version_ | 1780954218022043648 |
|---|---|
| author | Ryabchikov, D |
| author_facet | Ryabchikov, D |
| author_sort | Ryabchikov, D |
| collection | CERN |
| description | We present the description of the analysis methods and results of applying them to the exclusive diffractive reaction π−p → π−π−π+p of 50 · 106 events measured with COMPASS detector. The large statistics of π−π−π+ events enables the two-dimensional partial-wave analysis independently in 100 bins of m(3π) with 0.5 < m(3π) < 2.5 GeV/c2 and in 11 intervals of squared momentum transfer with 0.1 < t′ < 1 GeV2/c2. The partial-wave analysis sub-density matrix is the subject to further mass-dependent fits describing the data in terms of resonances in 3π system and coherent background contributions. The novel approach of extracting JPC= 0++(π+π−)Sisobar amplitudes as model-free functions, different for several JPC3π states, is used. It demonstrates the presence of processes π(1800) → f0(980)π and π(1800) → f0(1500)π as well as π2(1880) → f0(980)π and new narrow signal a1(1420) → f0(980)π, without any established shapes used for (π+π−)Sisobars. The presented analysis is subject to further development and refinements which currently take place. |
| id | oai-inspirehep.net-1422940 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2016 |
| record_format | invenio |
| spelling | oai-inspirehep.net-14229402019-09-30T06:29:59Zdoi:10.1063/1.4938635http://cds.cern.ch/record/2262535engRyabchikov, DThe reaction $\pi^{−}p \to \pi^{-}\pi^{-}\pi^{+}p$: Development of the analysis methods and selected resultsNuclear Physics - TheoryWe present the description of the analysis methods and results of applying them to the exclusive diffractive reaction π−p → π−π−π+p of 50 · 106 events measured with COMPASS detector. The large statistics of π−π−π+ events enables the two-dimensional partial-wave analysis independently in 100 bins of m(3π) with 0.5 < m(3π) < 2.5 GeV/c2 and in 11 intervals of squared momentum transfer with 0.1 < t′ < 1 GeV2/c2. The partial-wave analysis sub-density matrix is the subject to further mass-dependent fits describing the data in terms of resonances in 3π system and coherent background contributions. The novel approach of extracting JPC= 0++(π+π−)Sisobar amplitudes as model-free functions, different for several JPC3π states, is used. It demonstrates the presence of processes π(1800) → f0(980)π and π(1800) → f0(1500)π as well as π2(1880) → f0(980)π and new narrow signal a1(1420) → f0(980)π, without any established shapes used for (π+π−)Sisobars. The presented analysis is subject to further development and refinements which currently take place.oai:inspirehep.net:14229402016 |
| spellingShingle | Nuclear Physics - Theory Ryabchikov, D The reaction $\pi^{−}p \to \pi^{-}\pi^{-}\pi^{+}p$: Development of the analysis methods and selected results |
| title | The reaction $\pi^{−}p \to \pi^{-}\pi^{-}\pi^{+}p$: Development of the analysis methods and selected results |
| title_full | The reaction $\pi^{−}p \to \pi^{-}\pi^{-}\pi^{+}p$: Development of the analysis methods and selected results |
| title_fullStr | The reaction $\pi^{−}p \to \pi^{-}\pi^{-}\pi^{+}p$: Development of the analysis methods and selected results |
| title_full_unstemmed | The reaction $\pi^{−}p \to \pi^{-}\pi^{-}\pi^{+}p$: Development of the analysis methods and selected results |
| title_short | The reaction $\pi^{−}p \to \pi^{-}\pi^{-}\pi^{+}p$: Development of the analysis methods and selected results |
| title_sort | reaction $\pi^{−}p \to \pi^{-}\pi^{-}\pi^{+}p$: development of the analysis methods and selected results |
| topic | Nuclear Physics - Theory |
| url | https://dx.doi.org/10.1063/1.4938635 http://cds.cern.ch/record/2262535 |
| work_keys_str_mv | AT ryabchikovd thereactionpiptopipipipdevelopmentoftheanalysismethodsandselectedresults AT ryabchikovd reactionpiptopipipipdevelopmentoftheanalysismethodsandselectedresults |