Photon 2015

15-19 June 2015
Asia/Novosibirsk timezone
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Muon g-2

Date: 17 Jun 08:00 - 11:30

Conveners

• Dr. Knecht, Marc (CNRS - CPT Marseille)

Timetable | Contribution List

Displaying 8 contributions out of 8
Type: Oral presentation Session: Muon g-2
The BABAR Collaboration has an intensive program  studying hadronic cross sections at low-energy e+e- annihilations, accessible via initial-state radiation. These measurements allow significant improvements in the precision of the predicted value of the muon anomalous magnetic moment. We report here the results of recent studies on a number of final states, as e+e- -> K+K-,  e+e- -> K_S K_L ... More
Presented by Dr. Eugeny SOLODOV on 17/6/2015 at 2:45
Type: Oral presentation Session: Muon g-2
I will present a novel approach (see http://arxiv.org/abs/1504.02228 [1] Phys. Lett. B46 (2015) 325-329), to determine the leading hadronic corrections to the muon g-2. It consists in a measurement of the effective electromagnetic coupling in the space-like region extracted from Bhabha scattering data. This method can result in an alternative determination potentially competitive with the dis ... More
Presented by Dr. Graziano VENANZONI on 17/6/2015 at 4:15
Type: Oral presentation Session: Muon g-2
Precise hadronic cross section measurements are an important input for the standard model prediction of $(g-2)_\mu$. Especially, the most important hadronic cross section as input for $(g-2)\mu$, $\sigma_{\pi\pi} = \sigma(e^+e^-\rightarrow \pi^+\pi^-)$, has been measured over decades with ever increasing accuracy at accelerators in Novosibirsk, Orsay, and Frascati. More recently, the two most a ... More
Presented by Mr. Benedikt KLOSS on 17/6/2015 at 2:25
Type: Oral presentation Session: Muon g-2
Padé Approximants have been used to describe the light pseudoscalars transition form factors (TFFs) in the space-like region. Once the low energy parameters are determined from a fit to data, they provide a systematic and model-independent tool for describing the TFFs. We discuss their generalization to the bivariate case, which allows a systematic description for the double-virtual TFF. Thi ... More
Presented by Mr. Pablo SANCHEZ PUERTAS on 17/6/2015 at 11:40
Type: Oral presentation Session: Muon g-2
Since 2010 two detectors, CMD-3 and SND, have been collecting statistics at the electron-positron collider VEPP-2000. Until first technical stop in 2013, the integrated luminosity exceeded 60 pb$^{-1}$ for each detector in the wide c.m. energy range from 0.32 up to 2 GeV. The current status of analysis as well as recent results are reported.
Presented by Dr. Vassili KAZANIN on 17/6/2015 at 3:25
Type: Oral presentation Session: Muon g-2
The KLOE experiment was the first to exploit Initial State Radiation (ISR) processes to obtain the $e^+e^-\rightarrow\pi^+\pi^-(\gamma)$ cross section below 1 GeV. Three measurements have been published with small angle photon in the initial state: normalized using luminosity from Bhabha in 2005 and 2008 and using $\pi\pi\gamma / \mu\mu\gamma$ ratio in 2014. An independent measurement with t ... More
Presented by Dr. Giuseppe MANDAGLIO on 17/6/2015 at 3:05
Type: Oral presentation Session: Muon g-2
The anomalous magnetic moment of the muon is sensitive to loop contributions from all sectors of the Standard Model and, potentially, to virtual particles of New Physics. In fact, since many years there is an intriguing discrepancy of 3-4 standard deviations between experiment and theory. However, the hadronic uncertainties from vacuum polarization and light-by-light scattering dominate the t ... More
Presented by Dr. Andreas NYFFELER on 17/6/2015 at 2:00
Type: Oral presentation Session: Muon g-2
The Hidden Local Symmetry (HLS) Model provides a framework able to encompass several physical processes and give a unfied description of these in an energy range extending up to the $\phi$ mass. However, in order to account precisely for experimental data, it should be supplied with several symmetry breaking schemes. Among these, an energy dependent mixing mechanism of the vector mesons (\$ ... More
Presented by Dr. Maurice BENAYOUN on 17/6/2015 at 12:05
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