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Bottom Production in Two-Photon Collisions at LEP
Results on inclusive and exclusive bottom production in gammagamma collisions are presented. The total cross section of inclusive bottom production is investigated through its leptonic decays at LEP II energies by the experiments L3 and OPAL. The average cross section, after correction for acceptanc...
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| Lenguaje: | eng |
| Publicado: |
2001
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| Acceso en línea: | https://dx.doi.org/10.1142/9789812778345_0020 http://cds.cern.ch/record/503400 |
| _version_ | 1780897291237851136 |
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| author | Böhrer, Armin |
| author_facet | Böhrer, Armin |
| author_sort | Böhrer, Armin |
| collection | CERN |
| description | Results on inclusive and exclusive bottom production in gammagamma collisions are presented. The total cross section of inclusive bottom production is investigated through its leptonic decays at LEP II energies by the experiments L3 and OPAL. The average cross section, after correction for acceptances and efficiencies, is sigma_tot = 13.3 +- 1.5 +- 2.3 pb. The next-to-leading order calculations are lower than the data by a factor three, which corresponds to a difference of more than three standard deviations. ALEPH studied the exclusive bottom production. Searching for the eta_b one candidate is found. Limits on Gamma_gammagamma(eta_b)*BR for 4 and 6 charged particles are extracted. The candidate has a mass of 9.30 +- 0.04 GeV. |
| id | cern-503400 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2001 |
| record_format | invenio |
| spelling | cern-5034002023-03-14T20:12:36Zdoi:10.1142/9789812778345_0020http://cds.cern.ch/record/503400engBöhrer, ArminBottom Production in Two-Photon Collisions at LEPParticle Physics - ExperimentResults on inclusive and exclusive bottom production in gammagamma collisions are presented. The total cross section of inclusive bottom production is investigated through its leptonic decays at LEP II energies by the experiments L3 and OPAL. The average cross section, after correction for acceptances and efficiencies, is sigma_tot = 13.3 +- 1.5 +- 2.3 pb. The next-to-leading order calculations are lower than the data by a factor three, which corresponds to a difference of more than three standard deviations. ALEPH studied the exclusive bottom production. Searching for the eta_b one candidate is found. Limits on Gamma_gammagamma(eta_b)*BR for 4 and 6 charged particles are extracted. The candidate has a mass of 9.30 +- 0.04 GeV.Results on inclusive and exclusive bottom production in γγ collisions are presented. The total cross section of inclusive bottom production is investigated through its leptonic decays at LEP II energies by the experiments L3 and OPAL. The average cross section, after correction for acceptances and efficiencies, is σ<sub><span class="roman">tot</span></sub> = 13.3 ± 1.5 ± 2.3 <span class="roman">pb</span>. The next-to-leading order calculations are lower than the data by a factor three, which corresponds to a difference of more than three standard deviations.Results on inclusive and exclusive bottom production in gammagamma collisions are presented. The total cross section of inclusive bottom production is investigated through its leptonic decays at LEP II energies by the experiments L3 and OPAL. The average cross section, after correction for acceptances and efficiencies, is sigma_tot = 13.3 +- 1.5 +- 2.3 pb. The next-to-leading order calculations are lower than the data by a factor three, which corresponds to a difference of more than three standard deviations. ALEPH studied the exclusive bottom production. Searching for the eta_b one candidate is found. Limits on Gamma_gammagamma(eta_b)*BR for 4 and 6 charged particles are extracted. The candidate has a mass of 9.30 +- 0.04 GeV.hep-ex/0106020SI-2001-5CERN-ALEPH-PUB-2001-011oai:cds.cern.ch:5034002001-06-05 |
| spellingShingle | Particle Physics - Experiment Böhrer, Armin Bottom Production in Two-Photon Collisions at LEP |
| title | Bottom Production in Two-Photon Collisions at LEP |
| title_full | Bottom Production in Two-Photon Collisions at LEP |
| title_fullStr | Bottom Production in Two-Photon Collisions at LEP |
| title_full_unstemmed | Bottom Production in Two-Photon Collisions at LEP |
| title_short | Bottom Production in Two-Photon Collisions at LEP |
| title_sort | bottom production in two-photon collisions at lep |
| topic | Particle Physics - Experiment |
| url | https://dx.doi.org/10.1142/9789812778345_0020 http://cds.cern.ch/record/503400 |
| work_keys_str_mv | AT bohrerarmin bottomproductionintwophotoncollisionsatlep |