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Strong Coupling Constant from the Photon Structure Function
<!--HTML-->We extract the value of the strong coupling constant <i>alpha<sub>s</sub></i> from a single-parameter pointlike fit to the photon structure function <i>F<sub>2</sub>(gamma)</i> at large <i>x</i> and <i>Q<sup>2&l...
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| Lenguaje: | eng |
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2002
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| Acceso en línea: | http://cds.cern.ch/record/2799759 |
| _version_ | 1780972572737798144 |
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| author | Simon Albino (Institut fuer Theoretische Physik, Universität Hamburg), |
| author_facet | Simon Albino (Institut fuer Theoretische Physik, Universität Hamburg), |
| author_sort | Simon Albino (Institut fuer Theoretische Physik, Universität Hamburg), |
| collection | CERN |
| description | <!--HTML-->We extract the value of the strong coupling constant <i>alpha<sub>s</sub></i> from a single-parameter pointlike fit to the photon structure function <i>F<sub>2</sub>(gamma)</i> at large <i>x</i> and <i>Q<sup>2</sup></i> and from a first five-parameter full (pointlike and hadronic) fit to the complete <i>F<sub>2</sub>(gamma)</i> data set taken at PETRA, TRISTAN, and LEP. In next-to-leading order and the <i>MSbar</i> renormalization and factorization schemes, we obtain <i>alpha<sub>s</sub> (m<sub>Z</sub>)</i> = 0.1183 ± 0.0050 (exp.) <sup>+0.0029</sup>/<sub>-0.0028</sub> (theor.) [pointlike] and <i>alpha<sub>s</sub> (m<sub>Z</sub>)</i> = 0.1198 ± 0.0028 (exp.) <sup>+0.0034</sup>/<sub>-0.0046</sub> (theor.) [pointlike and hadronic]. We demonstrate that the data taken at LEP have reduced the experimental error by about a factor of two, so that a competitive determination of <i>alpha<sub>s</sub></i> from <i>F<sub>2</sub>(gamma)</i> is now possible.<BR><BR><I>Organiser(s): Ariane FREY / EP Division</I><BR><BR><I>Note: Tea and coffee will be served at 15:00 hrs.
Please note unusual day and place.</I> |
| id | cern-2799759 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2002 |
| record_format | invenio |
| spelling | cern-27997592022-11-02T22:02:52Zhttp://cds.cern.ch/record/2799759engSimon Albino (Institut fuer Theoretische Physik, Universität Hamburg), Strong Coupling Constant from the Photon Structure FunctionStrong Coupling Constant from the Photon Structure FunctionCERN EP Seminar (up to 2008)<!--HTML-->We extract the value of the strong coupling constant <i>alpha<sub>s</sub></i> from a single-parameter pointlike fit to the photon structure function <i>F<sub>2</sub>(gamma)</i> at large <i>x</i> and <i>Q<sup>2</sup></i> and from a first five-parameter full (pointlike and hadronic) fit to the complete <i>F<sub>2</sub>(gamma)</i> data set taken at PETRA, TRISTAN, and LEP. In next-to-leading order and the <i>MSbar</i> renormalization and factorization schemes, we obtain <i>alpha<sub>s</sub> (m<sub>Z</sub>)</i> = 0.1183 ± 0.0050 (exp.) <sup>+0.0029</sup>/<sub>-0.0028</sub> (theor.) [pointlike] and <i>alpha<sub>s</sub> (m<sub>Z</sub>)</i> = 0.1198 ± 0.0028 (exp.) <sup>+0.0034</sup>/<sub>-0.0046</sub> (theor.) [pointlike and hadronic]. We demonstrate that the data taken at LEP have reduced the experimental error by about a factor of two, so that a competitive determination of <i>alpha<sub>s</sub></i> from <i>F<sub>2</sub>(gamma)</i> is now possible.<BR><BR><I>Organiser(s): Ariane FREY / EP Division</I><BR><BR><I>Note: Tea and coffee will be served at 15:00 hrs. Please note unusual day and place.</I>oai:cds.cern.ch:27997592002 |
| spellingShingle | CERN EP Seminar (up to 2008) Simon Albino (Institut fuer Theoretische Physik, Universität Hamburg), Strong Coupling Constant from the Photon Structure Function |
| title | Strong Coupling Constant from the Photon Structure Function |
| title_full | Strong Coupling Constant from the Photon Structure Function |
| title_fullStr | Strong Coupling Constant from the Photon Structure Function |
| title_full_unstemmed | Strong Coupling Constant from the Photon Structure Function |
| title_short | Strong Coupling Constant from the Photon Structure Function |
| title_sort | strong coupling constant from the photon structure function |
| topic | CERN EP Seminar (up to 2008) |
| url | http://cds.cern.ch/record/2799759 |
| work_keys_str_mv | AT simonalbinoinstitutfuertheoretischephysikuniversitathamburg strongcouplingconstantfromthephotonstructurefunction |