Table · dataset · 2018
OPERA tau neutrino candidate event 9190097972
Listed in CERN Open Data
<p>This ${\nu_\tau}$ interaction occurred on July 9$^{th}$ 2009 in the first super-module, in the $25^{th}$ wall.
Description
No muon was identified by the reconstruction of the data provided by electronic detectors. All tracks possibly related to the interaction were searched for in the brick within an angular acceptance defined by $\tan\theta=3$.</p><p>After the analysis of the interface emulsion films, 5 tracks were found showing a converging path.
This finding triggered the brick film development. By the scan-back procedure, the neutrino interaction was located in the lead layer between the $35^{st}$ and $36^{nd}$ emulsion films.</p><p>The neutrino interaction vertex consists of five charged tracks. From the analysis of their impact parameters, it turned out that all tracks could not originate from the same vertex: a short decay must have occurred.
Read the rest (2 more)
Looking at the impact parameters, one of the tracks must have originated from a decay vertex occurred 10~$\mu$m upstream from the downstream face of the lead plate that contains the neutrino vertex. Since both primary and decay vertices are in the same lead plate, there are no base-tracks in emulsion associated to the $\tau$ lepton.</p><p>The flight length has been evaluated to be 822~$\mu$m, while the kink angle 146~mrad.
All tracks were recognized as hadrons: two of them stopped inside the brick, the others were classified thanks to the correlation between their momentum and range. The neutrino energy was measured to be $9.6$~GeV.</p><p>This event was thus interpreted as a $\nu_{\tau}$ charged-current interaction with the $\tau$ lepton decaying into a single hadron.</p>
Links
Where it is published
- CERN Open Data record opendata.cern.ch/record/10101 ↗
landing page · from CERN Open Data
- DOI doi.org/10.7483/opendata.opera.gf54.99lc ↗
DOI / persistent id · from CERN Open Data
Catalogue records · 1
- Record API opendata.cern.ch/api/records/10101 ↗
metadata API · from CERN Open Data
Topics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| CERN Open Data | 10101 | 15 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · CERN Open Data | connector:cern_opendata@1.0.0 | |
| byte_size | source · CERN Open Data | connector:cern_opendata@1.0.0 | |
| concepts[field].local:field:physics | mapping · CERN Open Data | connector:cern_opendata@1.0.0 | |
| concepts[instrument].cern_experiment:opera | source · CERN Open Data | connector:cern_opendata@1.0.0 | |
| description | source · CERN Open Data | connector:cern_opendata@1.0.0 | /metadata/abstract/description |
| license | source · CERN Open Data | connector:cern_opendata@1.0.0 | |
| publication_date | source · CERN Open Data | connector:cern_opendata@1.0.0 | |
| title | source · CERN Open Data | connector:cern_opendata@1.0.0 | /metadata/title |