Dark photon branch ratio
WebApr 18, 2024 · Photon-Dark Photon Conversions in Background Electromagnetic Fields. The mixing of photons with light pseudoscalars in the presence of external … http://insti.physics.sunysb.edu/~curtin/hahm_mg.html
Dark photon branch ratio
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WebApr 1, 2024 · Abstract We consider a generic dark photon that arises from a hidden U (1) gauge symmetry imposed on right-handed neutrinos ( νR ν R ). Such a νR ν R -philic dark photon is naturally dark due to the absence of tree-level couplings to normal matter. WebBranching Ratio Tables In "Illuminating Dark Photons with High-Energy Colliders" (Curtin, Essig, Gori, Shelton, arXiv:1412.0018 ) we compute the dark photon total width and …
WebApr 1, 2024 · Dark matter particles that annihilate into neutrinos will also inevitably branch into electromagnetic final states through higher-order tree and loop diagrams that give … WebNov 10, 2014 · The presence of the dark photon would be indicated by the appearance of an unexpected peak in the total mass of its decay products above smooth backgrounds. Dark photons may be expected to decay in these ways if there are no lighter dark matter particles, but the researchers discovered no evidence for peaks in the energy range …
WebdarkE photoncos( ) c)+2E m = m2 e c 2 (10) Now, we can simplify this equation by adding m2 e c 2 to both sides, and grouping like terms. Doing so gives us: m2 darkc 2 2(m eE … Webis the mass of the dark photon. If there is a light Higgs boson accom-panied with the dark photon, the sensitivity of XENON10 experiment is κ×e′ < 10−13, which is still second to the constraints from the lifetime of horizontal branch starts which dictates κ× e′ < 3× 10−14. PRESENTED AT CosPA 2013 Symposium
WebBranching ratios for the 19 dark photon decay channels included in our analysis as a function of the dark photon mass. Source publication Lepton Jets from Radiating Dark Matter Article...
WebMay 4, 2024 · We explain how the dark photon enters laboratory, astrophysical and cosmological observations as well as dark matter physics. We survey the current and … fluenz german crackedWebdark photon decays. The keys to improving sensitivity include increasing the luminosity and improvingthemassresolution(whichwoulddecreasetheeffectivebackgroundyields),bothof … fluenz homeschoolWebexcess is absorption of hidden photon dark matter relics with mass around 2.8 keVand kinetic mixing of about 10−15, which can also explain cooling excesses in horizontal-branch (HB) stars. Such ... flue outbrake in oklahomaWebOct 24, 2024 · In this second run of the experiment, we measured the radiative decay branching ratio in the energy range of 14 keV to 782 keV with a total uncertainty of 5 % (12-element bismuth germanate detector) and in the energy range from 0.4 keV to 14 keV with a total uncertainty of 11 % (bare photodiode detector). greene county extension office indianaWebIn a fixed target experiment dark photons can be generated by bremsstrahlung of scattering protons, in analogy with the ordinary photon bremmstrahlung. Consider a protonbeamwithinitialmomentumandenergy P andE prespectively. LetE 0andp betheenergyandmomentumofthegenerateddarkphoton. greene county extension office carrollton ilWebAbstract: Searches for dark photons provide serendipitous discovery potential for other types of vector particles. We develop a framework for recasting dark photon searches to … greene county extension office iowaWebAs a point of reference, the minimum detection limit of the dark-adapted eye is approximately 40 times that (40 million photons/second). A properly designed fluorescence microscope typically yields 10e8 to 10e9 photons per second from the focal volume, or 100 to 1000 photons/pixel/second with the same 1-megapixel sensor. flue open/closed