TY  - CONF
AU  - Denig, A.
TI  - Dark Photon Searches at MAMI and MESA
IS  - DESY-PROC-2013-04
CY  - Hamburg
PB  - Verlag Deutsches Elektronen-Synchrotron
M1  - PUBDB-2018-02776
M1  - DESY-PROC-2013-04
SN  - 978-3-935702-83-6 
T2  - DESY-PROC
SP  - 11-15
PY  - 2013
AB  - A hypothetical dark photon, denoted here as γ′, is a massive force carrier of an extra U(1) gauge group as predicted in almost all extensions of the Standard Model1.  In string theory the mass of such a dark photon cannot be predicted and experimental searches are indeed ongoing from very small mass scales, e.g.  axion-like scales, to the highest scales at the LHC. More recently, dark photons on the MeV to GeV mass scale are at the focus of interest.  This is due to the fact that Arkani-Hamed et al.  [1] as well as others have suggested that such a dark photon could couple to dark matter, which would also explain quite a large number of astrophysical observations, such as e.g.  the positron excess in the cosmic ray flux.  Furthermore, it was realized that the presently seen deviation between the Standard Model prediction and the direct measurementof  the  anomalous  magnetic  moment  of  the  muon, (g−2)<sub>μ</sub>,  on  the  level of 3 to 4  standard deviations [2] could also be explained by a GeV-scale dark photon.  The interaction strength of the dark photon with Standard Model matter is governed by the mechanism of kinetic mixing [3]. The coupling can be subsumed by an effective coupling constant ϵ and a vertex structure of a massive photon. 
T2  - 9th Patras Workshop on Axions, WIMPs and WISPs
CY  - 24 Jun 2013 - 28 Jun 2013, Mainz (Germany)
Y2  - 24 Jun 2013 - 28 Jun 2013
M2  - Mainz, Germany
KW  - Hypothetisches Teilchen (gnd)
LB  - PUB:(DE-HGF)29 ; PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.3204/DESY-PROC-2013-04/denig_achim
UR  - https://bib-pubdb1.desy.de/record/408323
ER  -