Recent BES measurements and the hadronic contribution to the QED vacuum polarization

We have updated our evaluation of the hadronic contribution to the running of the QED fine structure constant using the recent precise measurements of the e+e- annihilation at the center-of-mass (c.m.s.) energy region between 2.6 and 3.65 GeV performed by the BES collaboration. In the low energy reg...

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Detalles Bibliográficos
Autores principales: Burkhardt, H, Pietrzyk, B
Lenguaje:eng
Publicado: 2011
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.84.037502
http://cds.cern.ch/record/1359550
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author Burkhardt, H
Pietrzyk, B
author_facet Burkhardt, H
Pietrzyk, B
author_sort Burkhardt, H
collection CERN
description We have updated our evaluation of the hadronic contribution to the running of the QED fine structure constant using the recent precise measurements of the e+e- annihilation at the center-of-mass (c.m.s.) energy region between 2.6 and 3.65 GeV performed by the BES collaboration. In the low energy region, around the rho resonance, we include the recent measurements from the BABAR, CDM-2, KLOE and SND collaborations. We obtain Delta alpha (5)_had (s) = 0.02750 +/- 0.00033 at s = m_Z^2.
id cern-1359550
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
record_format invenio
spelling cern-13595502019-09-30T06:29:59Zdoi:10.1103/PhysRevD.84.037502http://cds.cern.ch/record/1359550engBurkhardt, HPietrzyk, BRecent BES measurements and the hadronic contribution to the QED vacuum polarizationParticle Physics - ExperimentWe have updated our evaluation of the hadronic contribution to the running of the QED fine structure constant using the recent precise measurements of the e+e- annihilation at the center-of-mass (c.m.s.) energy region between 2.6 and 3.65 GeV performed by the BES collaboration. In the low energy region, around the rho resonance, we include the recent measurements from the BABAR, CDM-2, KLOE and SND collaborations. We obtain Delta alpha (5)_had (s) = 0.02750 +/- 0.00033 at s = m_Z^2.arXiv:1106.2991oai:cds.cern.ch:13595502011-06-16
spellingShingle Particle Physics - Experiment
Burkhardt, H
Pietrzyk, B
Recent BES measurements and the hadronic contribution to the QED vacuum polarization
title Recent BES measurements and the hadronic contribution to the QED vacuum polarization
title_full Recent BES measurements and the hadronic contribution to the QED vacuum polarization
title_fullStr Recent BES measurements and the hadronic contribution to the QED vacuum polarization
title_full_unstemmed Recent BES measurements and the hadronic contribution to the QED vacuum polarization
title_short Recent BES measurements and the hadronic contribution to the QED vacuum polarization
title_sort recent bes measurements and the hadronic contribution to the qed vacuum polarization
topic Particle Physics - Experiment
url https://dx.doi.org/10.1103/PhysRevD.84.037502
http://cds.cern.ch/record/1359550
work_keys_str_mv AT burkhardth recentbesmeasurementsandthehadroniccontributiontotheqedvacuumpolarization
AT pietrzykb recentbesmeasurementsandthehadroniccontributiontotheqedvacuumpolarization

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