Collective nucleon scattering in neutron-star matter suppresses the effective absorption of ultralight bosons at the long wavelengths relevant for superradiance, weakening the link between stellar cooling bounds and superradiant instability rates.
Massless Gauge Bosons other than the Photon
4 Pith papers cite this work. Polarity classification is still indexing.
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abstract
Gauge bosons associated with unbroken gauge symmetries, under which all standard model fields are singlets, may interact with ordinary matter via higher-dimensional operators. A complete set of dimension-six operators involving a massless U(1) field, gamma-prime, and standard model fields is presented. The mu to e gamma-prime decay, primordial nucleosynthesis, star cooling and other phenomena set lower limits on the scale of chirality-flip operators in the 1 - 15 TeV range, if the operators have coefficients given by the corresponding Yukawa couplings. Simple renormalizable models induce gamma-prime interactions with leptons or quarks at two loops, and may provide a cold dark matter candidate.
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Theoretical proposal for a spacecraft-Earth experiment to constrain spin- and velocity-dependent fifth forces mediated by ultralight vector bosons, claiming up to three orders of magnitude improvement over current bounds.
Modified pQCD with transverse momenta and Sudakov suppression yields form factors for B→ρ(ω)γ that match LCSR after fitting soft components to data, then bounds B→ρ(ω)γ' branching ratios for a dark photon.
The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-charged fermion constraints.
citing papers explorer
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Stellar Superradiance and Low-Energy Absorption in Dense Nuclear Media
Collective nucleon scattering in neutron-star matter suppresses the effective absorption of ultralight bosons at the long wavelengths relevant for superradiance, weakening the link between stellar cooling bounds and superradiant instability rates.
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Potential of constraining the Fifth Force Using the Earth as a Spin and Mass Source from space
Theoretical proposal for a spacecraft-Earth experiment to constrain spin- and velocity-dependent fifth forces mediated by ultralight vector bosons, claiming up to three orders of magnitude improvement over current bounds.
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Branching ratios and CP violations of $B \to\rho (\omega) \gamma$ decays in the modified perturbative QCD approach and the relevant dark photonic decays of $B\to \rho (\omega) \gamma^\prime $
Modified pQCD with transverse momenta and Sudakov suppression yields form factors for B→ρ(ω)γ that match LCSR after fitting soft components to data, then bounds B→ρ(ω)γ' branching ratios for a dark photon.
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The Dark Photon
The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-charged fermion constraints.