Dark photon mass gev
[email protected] For technical assistance or help with our site, please contact us at: [email protected] Mailing Address: Lawrence Berkeley National Laboratory Particle … Webfa ≈1018 GeV. Our intent is to simply identify a part of parameter space where this model is self-consistent and achieves our desired goal. A broader analysis may reveal ... abundance, giving the dark photon a plasma mass in the early Universe. This plasma mass suppresses the cosmo-logical tachyonic instability, preserving axion dark matter. ...
Dark photon mass gev
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WebJul 22, 2024 · One hypothesis is that dark matter consists of particles that interact with each other and with visible matter through a new force carried by a particle called the dark … WebDark Photon Searches with ATLAS 2. Dark Boson Models. •Vector Portal: Add a U(1)’ whose massive “dark” gauge boson (A’ / Z. D/ γ. d. ) mixes kinetically with SM photon •+ Higgs Portal: Add dark scalar singlet (φ/ S) that spontaneously breaks U(1)’ and mixes with SM Higgs •Hidden Valley: sector of dark particles, interacting ...
Webspace of the dark photon for masses below 10 GeV. By refitting the DIS data in this way, we place upper limits on the mixing parameter of the dark photon for masses up to 80 … WebDec 25, 2024 · A coupling of a dark photon from a with the standard model (SM) particles can be generated through kinetic mixing represented by a parameter . A non-zero also induces a mixing between and if dark photon mass is not zero. This mixing can be large when is close to even if the parameter is small.
WebEqually interesting parameter space, dark photons are a valid DM candidate! (Recall very light DM need to be produced non-thermally) I Possibilities for generating correct relic … WebThe Circular Electron Positron Collider (CEPC) is a future Higgs factory proposed by the Chinese high energy physics community. It will operate at a center-of-mass energy of 240-250 GeV. The CEPC will accumulate an integrated luminosity of 5 ab(-1) over ten years of operation, producing one million Higgs bosons via the Higgsstrahlung and vector boson …
WebThe mass range from 1.5 to 2.9 GeV is scanned for the dark photon candidate, and no significant signal is observed. The mass dependent upper limits at the 90% confidence level on the coupling strength parameter ϵ for a dark photon coupling with an ordinary photon vary between 1.6 ×10 -3 and 5.7 ×10 -3 .
WebNov 10, 2024 · In conclusion, we perform a search for a dark photon in the mass range between 1.5 and 3.4 GeV/c 2, where we do not observe a significant signal. We set … tspsc highcourt applicationWebFeb 1, 2024 · Production of dark photon and dark scalar mediator In this section, we investigate the production of the massive dark photon and of the massive dark scalar mediator via the processes and ( and b) at the center-of-mass energies 91.2 GeV, 240 GeV, 500 GeV and 1 TeV, with different values of and . tspsc hmwssb resultWebApr 8, 2024 · In this study, we investigate axion-like particle (ALP), dark photon (DP), and chameleon dark energy (DE) models for a solution to the -boson mass excess. We find that the ALP and DP interpretations have been significantly narrowed down by global electroweak fits. tsp scholarship 2019 20WebFeb 4, 2024 · Centre Authors: Thomas, A. W., Williams, A. G., Wang, X. tsp scholarship 2019WebApr 1, 2024 · We derive a conservative lower-limit of the dark photon mass around 8.5 MeV from the current Planck data if the mixing between the dark photon and ordinary photon is larger than O (10 −9 ). We also find that the future CMB stage-IV experiments can probe up to 17 MeV dark photon. Download to read the full article text tsp scholarshipWebThe dark photon can obtain a highly suppressed mixing-induced coupling to the electromagnetic current, providing a portal through which dark photons can interact with ordinary matter. This review focuses on A ′ scenarios that are potentially accessible to accelerator-based experiments. phish denverWebJun 24, 2016 · In the low mass region, MS = (53{62:8) GeV, the main contribution to nal state radiation comes from the annihilation into two b-quarks and a photon, while in the heavy mass region the annihilation into two W gauge bosons and a photon is the dominant contribution. These results are very important to understand the visibility of the gamma … phish deer creek setlist