Dark photon branch ratio

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August undefined, 2024

WebAbstract: Searches for dark photons provide serendipitous discovery potential for other types of vector particles. We develop a framework for recasting dark photon searches to … Webto SM photon would occur through loops of heavy dark particles, charged under both electroweak and dark inter-actions, giving rise to a very weak mixing strength deﬁned as the ratio of dark and ﬁne structure coupling constants (ε2 =α/α<10−2). Moreover, the dark photon (re-ferred to also as U, A or γ) should get mass by means of

Dark Photons Probably Don

WebOct 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 % … 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 … fixing a mpow waterproof speaker

The branching ratio of the dark photon A into different …

http://dpnc.unige.ch/~mermod/Teaching/LLPs/MermodLLP_3.1.pdf WebOct 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). fixinga mth water tower

Advancing globular cluster constraints on the axion-photon …

[2005.01515] The Dark Photon - arXiv.org

WebAug 17, 2016 · The ratio of baryons to photons or the baryon abundance is defined as: n ≡ N b N γ ≃ 2.75 × 10 − 8 Ω b h 2 where N b is the number density of baryons, and N γ = 4.11 × 10 8 m − 3 is the number density of photons. Thus the primordial abundances of baryonic matter in the standard Big Bang nucleosynthesis scenario (BBN) is proportional to Ω b h 2. WebWe 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 BB¯ events collected by the Belle detector at the KEKB e + e − energy-asymmetric collider at the ϒ(4S) resonance. [Figure not available: see fulltext.] can my 13 year old get the nhs appWebApr 11, 2024 · dark photon. In this paper, we study experimental and theoretical constraints on an extensive set of mediator models. We show that these constraints limit the Higgs branching ratio to a photon and a dark photon to be far smaller than the current sensitivity of collider searches. I. INTRODUCTION The dark photon is a hypothetical Abelian … can my 12 year old drink protein shakes

"Web• Interpretation depends on a number of assumptions – Light hidden fermion in addition to the dark photon – Higgs decay branching ratio 21 Current hidden photon limits at the LHC Remember : ATLAS limit relies on more assumptions ATLAS ArXiv:1511.05542 (2015), CMS arXiv:1506.00424 (2015) 22 LHCb " - Dark photon branch ratio

Dark photon branch ratio

How dark is the $ν_R$-philic dark photon? (Journal …

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... http://128.84.4.18/pdf/2005.01515

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Webdark photon lighter than ∼20 GeV and regardless how the dark photon is produced. In Sec. IVB, we will explore the possibility of producing the dark photon from the mono … 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 …

WebThe dark photon sees ordinary matter only through the e ect of operators 4 like the magnetic moment or the charge form factors (of dimension higher than four). This is the choice de ning the massless dark photon proper: L0= e0J0 A 0 + e0" p 1 "2 J0 + e p 1 "2 WebFeb 1, 2024 · Ipair numerically equals the branching ratio related to the internal pair production or the internal pair production intensity; • Q511 is the number of 511 keV …

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. WebSep 20, 2024 · As conventional dark matter scenarios have been probed extensively so far, the physics of a light dark matter charged under a new gauge group (dark gauge group) becomes one of new research...

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

WebThe branching ratio of the dark photon A into different final states of interest as a function of mass M A : A → e + e − (purple), µ + µ − (green), and hadronic final states (orange). Adapted... fixing a missed rmdWebMay 23, 2024 · We find that the branching ratio of the Higgs boson to a photon and a dark photon is constrained to be far smaller than the sensitivity of current collider searches, … can my 12 year old work in my businesshttp://www.le.infn.it/~chiodini/allow_listing/padme/docs/darkphoton2005.01515.pdf can my 13 year old get a boosterWebMay 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 … can my 13 year old signup for paypalWebOct 31, 2024 · Centre Authors: Dolan, M., Volkas, R., Hiskens, F. fixing a mirror to plasterboardWebApr 9, 2024 · For the branching ratio to this channel to be realistically observable at the LHC, there must exist new mediators that interact with both the standard model and the dark photon. In this paper, we study experimental and theoretical constraints on an extensive set of mediator models. can my 13 year old join blink fitnessWebexcess 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 ... can my 13 year old watch outer banks