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Constraining MeV to 10 GeV majoron by Big Bang Nucleosynthesis

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arxiv 2401.00687 v2 pith:6EMLRRO7 submitted 2024-01-01 hep-ph nucl-th

Sanghyeon Chang , Sougata Ganguly , Tae Hyun Jung , Tae-Sun Park , Chang Sub Shin This is my paper
classification hep-phnucl-th
keywords constraintdeuteriummajoronneutrinosabundancebackgroundbangestimate
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We estimate the Big Bang nucleosynthesis (BBN) constraint on the majoron in the mass range between $1\,{\rm MeV}$ to $10\,{\rm GeV}$ which dominantly decays into the standard model neutrinos. When the majoron lifetime is shorter than $1\,{\rm sec}$, the injected neutrinos mainly heat up background plasma, which alters the relation between photon temperature and background neutrino temperature. For a lifetime longer than $1\,{\rm sec}$, most of the injected neutrinos directly contribute to the protons-to-neutrons conversion. In both cases, deuterium and helium abundances are enhanced, while the constraint from the deuterium is stronger than that from the helium. $^7{\rm Li}$ abundance gets decreased as a consequence of additional neutrons, but the parameter range that fits the observed $^7{\rm Li}$ abundance is excluded by the deuterium constraint. We also estimate other cosmological constraints and compare them with the BBN bound.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Consistent $N_{\rm eff}$ fitting in big bang nucleosynthesis analysis

    hep-ph 2025-07 unverdicted novelty 6.0 of 10

    Conventional BBN fitting for negative Delta N_eff is unphysical; a consistent treatment via entropy dilution after neutrino decoupling yields significantly different bounds.

  2. Bipartite Solution to the Lithium Problem

    hep-ph 2026-04 conditional novelty 5.0 of 10

    A sequential majoron-to-neutrinos decay followed by axion-like particle-to-photons decay can lower primordial lithium without exceeding deuterium limits.

  3. Light nuclei under magnetic field and the lithium problem

    nucl-th 2025-09 reject novelty 5.0 of 10

    Magnetic fields linearly change the exponential decay rate of light-nucleus wave functions, which the authors argue could enhance low-energy fusion reactions and, at implausibly high field strengths, affect the Big Ba...

  4. Joint probes of dark matter annihilation from neutrino detectors and CMB targets

    hep-ph 2026-06 unverdicted novelty 4.0 of 10

    Joint analysis of neutrino detectors and CMB observables can constrain dark matter annihilation into neutrinos for MeV-GeV masses.

  5. Improved Big Bang Nucleosynthesis constraints on decaying massive relics

    hep-ph 2026-05 unverdicted novelty 4.0 of 10

    Updated exclusion contours on lifetime, mass and abundance of decaying BSM relics from refined BBN modeling of hadronic and electromagnetic injections across multiple two-body channels.

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