Dark photon mass gev
WebDec 1, 2024 · Dark Matter 27. Dark Matter RevisedAugust2024byL.Baudis(ZurichU.)andS.Profumo(UCSantaCruz). ... the existence of DM is inferred directly using tracers of mass enclosed within a certain radius such as stellar velocity dispersion, rotation curves in axisymmetric systems, the virial theorem, ... DM/1 … WebThe 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.
Dark photon mass gev
Did you know?
WebApr 25, 2024 · In the previous study, it was assumed that the dark photon has a Stückelberg mass, or a mass generated by the Higgs mechanism with a sufficiently heavy Higgs boson. In this paper we consider a case in which the Higgs boson is not fully decoupled; the Higgs field changes its vacuum expectation value after inflation. WebApr 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
WebMar 1, 2024 · The measured relic abundance sets an upper limit on the spinless photon mass of 500 GeV, which decreases to almost 200 GeV if the Higgs boson is light. ... neutralino-like dark matter of a mass of about 130 GeV giving rise to a 130 GeV photon line; ii) an annihilation cross section of or larger than 10{sup −27} cm{sup 3} s{sup −1}; iii) ... 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 …
WebIn section III, we discuss the production and decays of dark photon at e + e − colliders. In section IV, a detailed collider simulation with dark photon mass ranging from 20 GeV to … WebJan 1, 2016 · the Dark Photon below 1 GeV in the ... No signal is observed, and an exclusion region in the plane of the dark photon mass mA' and mixing parameter ε2 is established. The obtained upper limits on ...
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 ...
WebDec 11, 2024 · New detection schemes will allow researchers to search for so-called sub-GeV dark matter, which can be up to one million times lighter than the mass of the proton. The new schemes rely on inelastic collisions between a dark matter particle and electrons or nuclei in various materials, such as semiconductors, scintillators, and superconductors. grammys crunchy romaine saladWebDec 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. china supermarket industryWeb2 Direct detection of sub-GeV dark matter8 2.1 Scattering rate9 2.2 Interaction strength10 2.3 Kinematics11 2.4 Direct detection with bound systems13 3 Electron excitations15 3.1 Atomic systems17 3.2 Solid state systems20 4 Phonon excitations23 4.1 Introduction to phonons24 4.2 Dynamic structure factor28 4.3 Dark photon couplings31 References 34 china supermarket food itemsWebMay 7, 2024 · Dark Photon and Muon g-2 Inspired Inelastic Dark Matter Models at the High-Energy Intensity Frontier Phys Rev Lett. 2024 May 7;126 (18):181801. doi: … china supermarket label holder manufacturerWebMay 7, 2024 · Abstract: We search for the dark photon cold dark matter (DP-CDM) using a cryogenic millimeter-wave receiver. DP-CDM weakly couples to electromagnetic fields … china supermarket lightsWebThe 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 . grammys crowchina supermarket lighting factory