How dark is the νR-philic dark photon?

Chauhan, Garv; Xu, Xun-Jie

doi:10.1007/jhep04(2021)003

Cited by 16 publications

(16 citation statements)

References 80 publications

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“…They can also lead to qualitatively new sources of LLPs, as in the case mentioned above of secondary production for a dark photon coupling to DM. A scenario that has been well studied in the literature consists of a Z and a HNL [95][96][97], which could also explain the MiniBooNE anomaly [98]. In addition to its usual neutrino-mixing based production modes, the HNL could be produced through Z → N N decays [99], or via the upscattering of SM neutrinos, νp → N p [88].…”

Section: Dark Photon Massmentioning

confidence: 99%

The Forward Physics Facility: Sites, Experiments, and Physics Potential

Anchordoqui,

Ariga,

Ariga

et al. 2021

Preprint

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Section: Dark Photon Massmentioning

confidence: 99%

The Forward Physics Facility: Sites, Experiments, and Physics Potential

Anchordoqui,

Ariga,

Ariga

et al. 2021

Preprint

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“…the inverse-square law, weak equivalent principle) are sensitive to light mediators coupled to normal matter (electrons or baryons) [42][43][44]. Although in the presence of φ-neutrino couplings, φ-electron couplings can be induced at the one-loop level [45,46], such loop-induced couplings are typically highly suppressed by the large hierarchy between neutrino masses and the electroweak scale. Hence bounds from long-range force searches can be neglected in this work.…”

Section: Appendix B: Potential Issues On the Binding Energy And The F...mentioning

confidence: 99%

Neutrino bound states and bound systems

Smirnov¹,

Xu²

2022

Preprint

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Yukawa interactions of neutrinos with a new light scalar boson φ can lead to formation of stable bound states and bound systems of many neutrinos (ν-clusters). For allowed values of the coupling y and the scalar mass m φ , the bound state of two neutrinos would have the size larger than 10 12 cm. Bound states with sub-cm sizes are possible for keV scale sterile neutrinos with coupling y > 10 −4 . For the ν-clusters we study in detail the properties of final stable configurations. If there is an efficient cooling mechanism, these configurations are in the state of degenerate Fermi gas. We formulate and solve equations to describe the density distributions in ν-clusters for different values of the total number of neutrinos, N . In the non-relativistic case, they are reduced to the Lane-Emden equation. We find that (i) stable configurations exist for any number of neutrinos; (ii) there is a maximal central density ∼ 10 9 cm −3 determined by the neutrino mass; (iii) for a given m φ there is a minimal value of N y 3 for which stable configurations can be formed; (iv) for a given strength of interaction (∝ y/m φ ), the minimal radius of ν-clusters exists. We discuss the formation of the ν-clusters from relic neutrino background in the process of expansion and cooling of the Universe. One possibility is the development of instabilities in the ν-background at T < mν which leads to its fragmentation. Another way is the growth of initial density perturbations in the ν-background and virialiazation in analogy with formation of the Dark Matter halos. For allowed values of y, cooling of ν-clusters due to φ-bremsstrahlung and neutrino annihilation is negligible. ν-clusters can be formed with the sizes ranging from ∼ km to ∼ 10 Mpc.

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“…Here the g f should be viewed as effective couplings. They may be fundamental, induced by kinetic or mass mixing (see the discussion in the next section), or generated by loop-level processes (see for instance [58]). The SM fermion f can be either chiral (e.g.…”

Section: Generic Z Couplingsmentioning

confidence: 99%

Probing the muon g − 2 with future beam dump experiments

Coy

2021

J. High Energ. Phys.

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We consider the light Z′ explanation of the muon g − 2 anomaly. Even if such a Z′ has no tree-level coupling to electrons, in general one will be induced at loop-level. We show that future beam dump experiments are powerful enough to place stringent constraints on—or discover—a Z′ with loop-suppressed couplings to electrons. Such bounds are avoided only if the Z′ has a large interaction with neutrinos, in which case the scenario will be bounded by ongoing neutrino scattering experiments. The complementarity between beam dump and neutrino scattering experiments therefore indicates that there are good prospects of probing a large part of the Z′ parameter space in the near future.

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How dark is the νR-philic dark photon?

Cited by 16 publications

References 80 publications

The Forward Physics Facility: Sites, Experiments, and Physics Potential

The Forward Physics Facility: Sites, Experiments, and Physics Potential

Neutrino bound states and bound systems

Probing the muon g − 2 with future beam dump experiments

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