Publication
$\Sigma^0$ production in proton nucleus collisions near threshold
| dc.contributor.author | HADES collaboration (109 authors) | |
| dc.contributor.author | Blanco, A. | |
| dc.contributor.author | Bordalo, P. | |
| dc.contributor.author | Fonte, P. | |
| dc.contributor.author | Franco, C. | |
| dc.contributor.author | Lopes, L. | |
| dc.contributor.author | Mangiarotti, A. | |
| dc.contributor.author | Ramos, S. | |
| dc.contributor.author | Silva, L. | |
| dc.date.accessioned | 2019-02-05T15:31:09Z | |
| dc.date.available | 2019-02-05T15:31:09Z | |
| dc.date.issued | 2018-06-10 | |
| dc.date.updated | 2019-02-05T15:31:09Z | |
| dc.description.abstract | The production of Σ0 baryons in the nuclear reaction p (3.5 GeV) + Nb (corresponding to sNN=3.18 GeV) is studied with the detector set-up HADES at GSI, Darmstadt. Σ0 s were identified via the decay Σ0→Λγ with subsequent decays Λ→pπ− in coincidence with a e+e− pair from either external ( γ→e+e− ) or internal (Dalitz decay γ⁎→e+e− ) gamma conversions. The differential Σ0 cross section integrated over the detector acceptance, i.e. the rapidity interval 0.5<y<1.1 , has been extracted as ΔσΣ0=2.3±(0.2)stat±(−0.6+0.6)sys±(0.2)norm mb, yielding the inclusive production cross section in full phase space σΣ0total=5.8±(0.5)stat±(−1.4+1.4)sys±(0.6)norm±(1.7)extrapol mb by averaging over different extrapolation methods. The Λall/Σ0 ratio within the HADES acceptance is equal to 2.3±(0.2)stat±(−0.6+0.6)sys . The obtained rapidity and momentum distributions are compared to transport model calculations. The Σ0 yield agrees with the statistical model of particle production in nuclear reactions. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Lett. B781 (2018) 735-740; DOI 10.1016/j.physletb.2018.02.043 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physletb.2018.02.043 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/27506 | |
| dc.language.iso | eng | |
| dc.title | $\Sigma^0$ production in proton nucleus collisions near threshold | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |