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Status of precision tests of the Standard Model
The status of precision tests of the Standard Model is reviewed.
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| Lenguaje: | eng |
| Publicado: |
1997
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| Acceso en línea: | https://dx.doi.org/10.1007/978-1-4615-5963-4_1 http://cds.cern.ch/record/314236 |
| _version_ | 1780890269903749120 |
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| author | Altarelli, Guido |
| author_facet | Altarelli, Guido |
| author_sort | Altarelli, Guido |
| collection | CERN |
| description | The status of precision tests of the Standard Model is reviewed. |
| id | cern-314236 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1997 |
| record_format | invenio |
| spelling | cern-3142362023-03-14T19:28:59Zdoi:10.1007/978-1-4615-5963-4_1http://cds.cern.ch/record/314236engAltarelli, GuidoStatus of precision tests of the Standard ModelParticle Physics - PhenomenologyThe status of precision tests of the Standard Model is reviewed.The running of LEP1 was terminated in 1995 and close-to-final results of the data analysis are now available and were presented at the Warsaw Conference in July 1996[1],[2]. LEP and SLC started in 1989 and the first results from the collider run at the Tevatron were also first presented at about that time. I went back to my rapporteur talk at the Stanford Conference in August 1989[3] and I found the following best values quoted there for some of the key quantities of interest for the Standard Model (SM) phenomenology: m z = 91120(160) MeV; m t = 130 (50) GeV; sin2 θ ef f = 0.23300(230) and α s (m z ) = 0.110(10). Now, after seven years of experimental and theoretical work (in particular with 16 million Z events analysed altogether by the four LEP experiments) the corresponding numbers, as quoted at the Warsaw Conference, are: m z = 91186.3(2.0) MeV; m t = 175(6) GeV; sin2 θ ef f 0.23165(24) and α s (m z )= 0.118(3). The progress is quite evident. The top quark has been at last found and the errors on m z and sin2 θ ef f went down by two and one orders of magnitude respectively. At the start the goals of LEP, SLC and the Tevatron were to: a) perform precision tests of the SM at the level of a few per mille accuracy; b) count neutrinos (N v = 2.989(12)); c) search for the top quark (m t = 175(6) GeV); d) search for the Eggs (m H > 65 GeV); e) search for new particles (none found). While for most of the issues the results can be summarized in very few bits, as just shown, it is by far more complex for the first one. The validity of the SM has been confirmed to a level that I can say was unexpected at the beginning.The status of precision tests of the Standard Model is reviewed.hep-ph/9611239CERN-TH-96-265CERN-TH-96-265oai:cds.cern.ch:3142361997 |
| spellingShingle | Particle Physics - Phenomenology Altarelli, Guido Status of precision tests of the Standard Model |
| title | Status of precision tests of the Standard Model |
| title_full | Status of precision tests of the Standard Model |
| title_fullStr | Status of precision tests of the Standard Model |
| title_full_unstemmed | Status of precision tests of the Standard Model |
| title_short | Status of precision tests of the Standard Model |
| title_sort | status of precision tests of the standard model |
| topic | Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1007/978-1-4615-5963-4_1 http://cds.cern.ch/record/314236 |
| work_keys_str_mv | AT altarelliguido statusofprecisiontestsofthestandardmodel |