Cargando…
The $e^+ e^-$ and $π^+ π^-$ pair peak positions in the relative momentum components spectra
One of the main problem in the metastable π+ π- bound states observation in the DIRAC Experiment is the separation of π+ and π- pairs produced in Be target and pairs, produced by breakdown metastable atoms in Pt foil . Therefore we used a horizontal magnetic field to separate these π+ π- pairs . In...
| Autor principal: | |
|---|---|
| Lenguaje: | eng |
| Publicado: |
2014
|
| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/1755644 |
| _version_ | 1780943323293286400 |
|---|---|
| author | Dumitriu, U |
| author_facet | Dumitriu, U |
| author_sort | Dumitriu, U |
| collection | CERN |
| description | One of the main problem in the metastable π+ π- bound states observation in the DIRAC Experiment is the separation of π+ and π- pairs produced in Be target and pairs, produced by breakdown metastable atoms in Pt foil . Therefore we used a horizontal magnetic field to separate these π+ π- pairs . In this field the Qy component of the relative momentum is significant larger for π+ π- pairs produced in Be target, as long as π+ π- pairs produced in the Pt foil have smaller Qy . The present paper evaluate the se Qy values based on e+ and e- pairs produced in the Be target and e+ and e- pairs produced in the Pt foil. The particle pairs produced in the Be target have a mean value Qy ≈ 12.7 MeV/c and the pairs produced in the Pt foil have a mean value Qy ≈ 2.3MeV/c. |
| id | cern-1755644 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2014 |
| record_format | invenio |
| spelling | cern-17556442019-09-30T06:29:59Zhttp://cds.cern.ch/record/1755644engDumitriu, UThe $e^+ e^-$ and $π^+ π^-$ pair peak positions in the relative momentum components spectraDetectors and Experimental TechniquesOne of the main problem in the metastable π+ π- bound states observation in the DIRAC Experiment is the separation of π+ and π- pairs produced in Be target and pairs, produced by breakdown metastable atoms in Pt foil . Therefore we used a horizontal magnetic field to separate these π+ π- pairs . In this field the Qy component of the relative momentum is significant larger for π+ π- pairs produced in Be target, as long as π+ π- pairs produced in the Pt foil have smaller Qy . The present paper evaluate the se Qy values based on e+ and e- pairs produced in the Be target and e+ and e- pairs produced in the Pt foil. The particle pairs produced in the Be target have a mean value Qy ≈ 12.7 MeV/c and the pairs produced in the Pt foil have a mean value Qy ≈ 2.3MeV/c.DIRAC-Note-2014-02oai:cds.cern.ch:17556442014-03-25 |
| spellingShingle | Detectors and Experimental Techniques Dumitriu, U The $e^+ e^-$ and $π^+ π^-$ pair peak positions in the relative momentum components spectra |
| title | The $e^+ e^-$ and $π^+ π^-$ pair peak positions in the relative momentum components spectra |
| title_full | The $e^+ e^-$ and $π^+ π^-$ pair peak positions in the relative momentum components spectra |
| title_fullStr | The $e^+ e^-$ and $π^+ π^-$ pair peak positions in the relative momentum components spectra |
| title_full_unstemmed | The $e^+ e^-$ and $π^+ π^-$ pair peak positions in the relative momentum components spectra |
| title_short | The $e^+ e^-$ and $π^+ π^-$ pair peak positions in the relative momentum components spectra |
| title_sort | $e^+ e^-$ and $π^+ π^-$ pair peak positions in the relative momentum components spectra |
| topic | Detectors and Experimental Techniques |
| url | http://cds.cern.ch/record/1755644 |
| work_keys_str_mv | AT dumitriuu theeeandpppairpeakpositionsintherelativemomentumcomponentsspectra AT dumitriuu eeandpppairpeakpositionsintherelativemomentumcomponentsspectra |