%0 Generic %1 Jegerlehner2009Muon %A Jegerlehner, Fred %A Nyffeler, Andreas %D 2009 %K g-2, review %T The Muon g-2 %U http://arxiv.org/abs/0902.3360 %X The muon anomalous magnetic moment is one of the most precisely measured quantities in particle physics. In a recent experiment at Brookhaven it has been measured with a remarkable 14-fold improvement of the previous CERN experiment reaching a precision of 0.54ppm. Since the first results were published, a persisting "discrepancy" between theory and experiment of about 3 standard deviations is observed. It is the largest "established" deviation from the Standard Model seen in a "clean" electroweak observable and thus could be a hint for New Physics to be around the corner. This deviation triggered numerous speculations about the possible origin of the "missing piece" and the increased experimental precision animated a multitude of new theoretical efforts which lead to a substantial improvement of the prediction of the muon anomaly a\_mu=(g\_mu-2)/2. The dominating uncertainty of the prediction, caused by strong interaction effects, could be reduced substantially, due to new hadronic cross section measurements in electron-positron annihilation at low energies. Also the recent electron g-2 measurement at Harvard contributes substantially to the progress in this field, as it allows for a much more precise determination of the fine structure constant alpha as well as a cross check of the status of our theoretical understanding.

@misc{Jegerlehner2009Muon, abstract = {{The muon anomalous magnetic moment is one of the most precisely measured quantities in particle physics. In a recent experiment at Brookhaven it has been measured with a remarkable 14-fold improvement of the previous CERN experiment reaching a precision of 0.54ppm. Since the first results were published, a persisting "discrepancy" between theory and experiment of about 3 standard deviations is observed. It is the largest "established" deviation from the Standard Model seen in a "clean" electroweak observable and thus could be a hint for New Physics to be around the corner. This deviation triggered numerous speculations about the possible origin of the "missing piece" and the increased experimental precision animated a multitude of new theoretical efforts which lead to a substantial improvement of the prediction of the muon anomaly a\_mu=(g\_mu-2)/2. The dominating uncertainty of the prediction, caused by strong interaction effects, could be reduced substantially, due to new hadronic cross section measurements in electron-positron annihilation at low energies. Also the recent electron g-2 measurement at Harvard contributes substantially to the progress in this field, as it allows for a much more precise determination of the fine structure constant alpha as well as a cross check of the status of our theoretical understanding.}}, added-at = {2019-02-23T22:09:48.000+0100}, archiveprefix = {arXiv}, author = {Jegerlehner, Fred and Nyffeler, Andreas}, biburl = {https://www.bibsonomy.org/bibtex/244eff285794177f90948e6df84217879/cmcneile}, citeulike-article-id = {4221874}, citeulike-linkout-0 = {http://arxiv.org/abs/0902.3360}, citeulike-linkout-1 = {http://arxiv.org/pdf/0902.3360}, day = 19, eprint = {0902.3360}, interhash = {458a750b4bac562c6b38e1b810103f92}, intrahash = {44eff285794177f90948e6df84217879}, keywords = {g-2, review}, month = feb, posted-at = {2011-06-06 11:21:09}, priority = {2}, timestamp = {2019-02-23T22:15:27.000+0100}, title = {{The Muon g-2}}, url = {http://arxiv.org/abs/0902.3360}, year = 2009 }