6533b86ffe1ef96bd12cd2e3
RESEARCH PRODUCT
Highlights from the COMPASS experiment at CERN. Hadron spectroscopy and excitations
Frank Nerlingsubject
PhysicsMuonLarge Hadron Collider010308 nuclear & particles physicsPhysicsQC1-999HadronFOS: Physical sciences01 natural sciencesHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - PhenomenologyHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)PionHadron spectroscopyCompass0103 physical sciencesCOMPASS experimentRadiative transferHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsParticle Physics - Experimentdescription
The COMPASS experiment at the CERN-SPS studies the spectrum and the structure of hadrons by scattering high energy hadrons and polarised muons off various fixed targets. Recent results for the hadron programme comprise highlights from different topics. A selective overview is given and, among others, the following results are discussed. The precise determination of the pion polarisability, a long standing puzzle that has been solved now, is presented as well as measurements of radiative widths. The observation of a new narrow axial-vector state, the $a_1(1420)$, as well as deeper insights into the exotic $1^{-+}$-wave, which is under study since decades by several experiments, are discussed and further, the search for the charmonium-like exotic $Z_c(3900)$ state in the COMPASS data is covered.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-01-19 | EPJ Web of Conferences |