Light-Meson Spectroscopy at Compass
The goal of the Compass experiment at CERN is to study the structure and spectroscopy of hadrons. The two-stage spectrometer has large acceptance and covers a wide kinematic range for charged as well as neutral particles allowing to access a wide range of reactions. Light mesons are studied with neg...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2017-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201713705012 |
| _version_ | 1818648458319364096 |
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| author | Krinner Fabian |
| author_facet | Krinner Fabian |
| author_sort | Krinner Fabian |
| collection | DOAJ |
| description | The goal of the Compass experiment at CERN is to study the structure and spectroscopy of hadrons. The two-stage spectrometer has large acceptance and covers a wide kinematic range for charged as well as neutral particles allowing to access a wide range of reactions. Light mesons are studied with negative (mostly π−) and positive (p, π+) hadron beams with a momentum of 190 GeV/c.
The light-meson spectrum is measured in different final states produced in diffractive dissociation reactions with squared four-momentum transfer t to the target between 0.1 and 1.0 (GeV/c)2. The flagship channel is the π−π+π− final state, for which Compass has recorded the currently world’s largest data sample. These data not only allow us to measure the properties of known resonances with high precision, but also to search for new states. Among these is a new axial-vector signal, the a1(1420), with unusual properties. The findings are confirmed by the analysis of the π−π0π0 final state. |
| first_indexed | 2024-12-17T01:18:45Z |
| format | Article |
| id | doaj.art-0da0e1089d3e4ff792a420141d60d6cf |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-17T01:18:45Z |
| publishDate | 2017-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-0da0e1089d3e4ff792a420141d60d6cf2022-12-21T22:08:54ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011370501210.1051/epjconf/201713705012epjconf_conf2017_05012Light-Meson Spectroscopy at CompassKrinner Fabian0Technische Universität München - Physik-Department - E18The goal of the Compass experiment at CERN is to study the structure and spectroscopy of hadrons. The two-stage spectrometer has large acceptance and covers a wide kinematic range for charged as well as neutral particles allowing to access a wide range of reactions. Light mesons are studied with negative (mostly π−) and positive (p, π+) hadron beams with a momentum of 190 GeV/c. The light-meson spectrum is measured in different final states produced in diffractive dissociation reactions with squared four-momentum transfer t to the target between 0.1 and 1.0 (GeV/c)2. The flagship channel is the π−π+π− final state, for which Compass has recorded the currently world’s largest data sample. These data not only allow us to measure the properties of known resonances with high precision, but also to search for new states. Among these is a new axial-vector signal, the a1(1420), with unusual properties. The findings are confirmed by the analysis of the π−π0π0 final state.https://doi.org/10.1051/epjconf/201713705012 |
| spellingShingle | Krinner Fabian Light-Meson Spectroscopy at Compass EPJ Web of Conferences |
| title | Light-Meson Spectroscopy at Compass |
| title_full | Light-Meson Spectroscopy at Compass |
| title_fullStr | Light-Meson Spectroscopy at Compass |
| title_full_unstemmed | Light-Meson Spectroscopy at Compass |
| title_short | Light-Meson Spectroscopy at Compass |
| title_sort | light meson spectroscopy at compass |
| url | https://doi.org/10.1051/epjconf/201713705012 |
| work_keys_str_mv | AT krinnerfabian lightmesonspectroscopyatcompass |