Dark photon mass gev

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August undefined, 2024

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 … Web2 days ago · Center: Binned number of events in a Ge target with a kg-yr exposure, assuming a DM mass of GeV and a heavy mediator. ... Projected constraints on the dark matter interaction cross section in the dark photon mediator model from a few anisotropic crystal targets. Solid curves are the 95% C.L. constraints (3 events), and dashed curves …

PHYSICAL REVIEW D 105, L031901 (2024) - University of …

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 … 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 … how to support children with special needs

Constraints on the dark photon from deep inelastic scattering

WebMay 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: … 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 … 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 … reading rainbow contest

Search for a heavy dark photon at future $e^+e^-$ colliders

Physics - New Light Shed on Dark Photons

WebMay 5, 2015 · Abstract. A sample of 1.69 × 10 7 fully reconstructed π 0 → γe + e – decay candidates collected by the NA48/2 experiment at CERN in 2003–2004 is analyzed to search for the dark photon (A') production in the π0→γA' decay followed by the prompt A' → e + e – decay. No signal is observed, and an exclusion region in the plane of the dark … WebMay 11, 2024 · We observe no obvious enhancement in the mass range between 1.5 and 3.4 GeV/$c^{2}$ and set a 90% confidence level upper limit on the mixing strength of the … how to support children with selective mutismWebJul 16, 2024 · For models of scalar and fermionic light thermal dark matter production via dark photon, we present the constrains on the dimensionless dark matter parameter as function of the DM mass at BESIII and future STCF, conventionally assuming the dark coupling constant and . reading rainbow closing credits

"WebApr 20, 2024 · We present a search for the dark photon A′ in the B 0 → A′A′ decays, where A′ subsequently decays to e + e −, μ + μ −, and π + π −.The search is performed by analyzing 772 × 10 6 $ B\overline{B} $ events collected by the Belle detector at the KEKB e + e − energy-asymmetric collider at the ϒ(4S) resonance.No signal is found in the dark … " - Dark photon mass gev

Dark photon mass gev

Clockwork mechanism to remove superradiance limits

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. WebDec 2, 2024 · The Heavy Photon Search Group at SLAC is collaborating with physicists at Jefferson Lab, INFN, IN2P3, UNH and UCSC in an experiment aimed at discovering a hidden-sector photon (aka "dark" photon or "heavy" photon). Such a particle could have mass in the range 0.01 to 0.5 GeV, couple weakly to electrons, and decay to e + e -.

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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 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.

Web2 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 WebDark photons are particles invoked in some extensions of the Standard Model which could account for at least part of the dark matter content of the Universe.

WebNov 1, 2024 · Dark Photon parameters: coupling and mass. To introduce the fundamental parameters for the description of a dark photon, the coupling and its mass, let us … WebDark photon limits Data, plots and code for constraints on axions, axion-like particles, and dark photons ... Tests of coulomb law/photon mass. Atomic spectroscopy: limit, reference; AFM limit, reference; ... They also …

WebNov 10, 2014 · The data analysis covered the A ′ mass range between 0. 2 and 10. 2 GeV / c 2. The presence of the dark photon would be indicated by the appearance of an unexpected peak in the total mass of its decay …

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 … how to support comt geneWebJun 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 … reading rainbow come a tideWebTo broaden the exploration of this predicted dark matter particle, a second search was carried out considering some heavy Higgs bosons with masses ranging from 400 GeV to 3 TeV, produced either in gluon-gluon Fusion (ggF) or in Vector-Boson-Fusion (VBF) modes. how to support closet shelvesWebDark photon search in the mass range between 1.5 and 3.4 GeV/c Haddadi, Z.; Kalantar-Nayestanaki, N.; Kavatsyuk, M.; Löhner, H.; Messchendorp, J. G.; Tiemens, M.; BESIII … reading rainbow book reviewWebJan 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 ... reading rainbow come a tide youtubeWebfa ≈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. ... how to support clematis vinesWebFeb 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 . how to support communication and language