Dark Forces at Accelerators

Session

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17 Oct 2012, 16:30

Aula B. Touschek, Bldg 36 (INFN-LNF)

20. 10 orders of magnitude lighter -- Fundamental physics @ really low energies

Joerg Jaeckel (University of Durham)

17/10/2012, 16:30

Although this workshop is mainly concerned with the MeV to GeV scale, new physics may hide at even lower perhaps sub-eV masses. A famous example is the axion which has a sub-eV mass, solves the strong CP problem (appearing at the few 100 MeV scale of QCD) and is also one of the leading dark matter candidates. Going beyond this example we argue that there exists an excellent `physics...

22. The Muon Anomaly and Dark Parity Violation

Dr William Marciano (Brookhaven National Laboratory)

17/10/2012, 17:05

A possible "Dark Boson" explanation for the 3.6sigma discrepancy between the muon anomalous magnetic moment theory and experiment is reviewed. Implications for low energy atomic and polarized electron scattering parity violation experiments are described. Signatures for such a "Dark Boson" in K, B and Higgs decays are discussed.

23. A new parity violation experiment

Frank Maas (University of Mainz)

17/10/2012, 17:40

After a series of parity violating electron scattering experiments which explored the strangeness content of the nucleon, we plan on a new, improved parity violation experiment where we will measure the weak charge of the proton with a relative accuracy of 1.7%. This accuracy results in a measurement of the effective electroweak mixing angle sin^2 theta_W of 1.5 per mille, which is an...

30. The New Muon g-2 Experiment at Fermilab

Graziano Venanzoni (LNF)

17/10/2012, 18:15

There is a long standing discrepancy between the Standard Model prediction for the muon g-2 and the value measured by the Brookhaven E821 Experiment. At present the discrepancy stands at about three standard deviations, with comparable accuracy between experiment and theory. Two new proposals at Femilab and J-PARC plan to improve the experimental uncertainty of a factor 4, and there is...

15. Search for dark photons at low energy e-gamma collider

Mr Sergiy Ivashyn (ITP NSC KIPT (Kharkiv))

17/10/2012, 18:50

We study a possibility of neutral pion and dark photon production at a high-luminosity photon-electron collider with the energy of the photon about 20 Mev and the energy of the electron about 1 GeV. The neutral pion production channel is Primakoff-type via the t-channel photon exchange. The dark photon production channel is similar to the timelike Compton scattering on the...