Majoron at two loops

Heeck, Julian; Patel, Hiren H.

doi:10.1103/physrevd.100.095015

Cited by 55 publications

(48 citation statements)

References 93 publications

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“…• Photophobic models where E UV = 0 and the electron coupling dominates the phenomenology. See [88] for a general discussion of photophobic ALPs and the Majoron [89,90] as a particularly motivated example of this coupling structure.…”

Section: Jhep01(2021)178mentioning

confidence: 99%

Exploring new physics with O(keV) electron recoils in direct detection experiments

Bloch

Caputo

Essig

et al. 2021

J. High Energ. Phys.

106

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Motivated by the recent XENON1T results, we explore various new physics models that can be discovered through searches for electron recoils in $$ \mathcal{O} $$ O (keV)-threshold direct-detection experiments. First, we consider the absorption of axion-like particles, dark photons, and scalars, either as dark matter relics or being produced directly in the Sun. In the latter case, we find that keV mass bosons produced in the Sun provide an adequate fit to the data but are excluded by stellar cooling constraints. We address this tension by introducing a novel Chameleon-like axion model, which can explain the excess while evading the stellar bounds. We find that absorption of bosonic dark matter provides a viable explanation for the excess only if the dark matter is a dark photon or an axion. In the latter case, photophobic axion couplings are necessary to avoid X-ray constraints. Second, we analyze models of dark matter-electron scattering to determine which models might explain the excess. Standard scattering of dark matter with electrons is generically in conflict with data from lower-threshold experiments. Momentum-dependent interactions with a heavy mediator can fit the data with dark matter mass heavier than a GeV but are generically in tension with collider constraints. Next, we consider dark matter consisting of two (or more) states that have a small mass splitting. The exothermic (down)scattering of the heavier state to the lighter state can fit the data for keV mass splittings. Finally, we consider a subcomponent of dark matter that is accelerated by scattering off cosmic rays, finding that dark matter interacting though an $$ \mathcal{O} $$ O (100 keV)-mass mediator can fit the data. The cross sections required in this scenario are, however, typically challenged by complementary probes of the light mediator. Throughout our study, we implement an unbinned Monte Carlo analysis and use an improved energy reconstruction of the XENON1T events.

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Section: Jhep01(2021)178mentioning

confidence: 99%

Exploring new physics with O(keV) electron recoils in direct detection experiments

Bloch

Caputo

Essig

et al. 2021

J. High Energ. Phys.

106

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“…These require additional considerations, such as inclusion of secondary emission and propagation effects, which are beyond the scope of this paper and have been performed elsewhere (see, e.g., Refs. [12,[15][16][17][18][19][20]).…”

Section: B Indirect Detection Signaturesmentioning

confidence: 99%

Loop dominated signals from neutrino portal dark matter

2020

Self Cite

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We study scenarios where loop processes give the dominant contributions to dark matter decay or annihilation despite the presence of tree-level channels. We illustrate this possibility in a specific model where dark matter is part of a hidden sector that communicates with the Standard Model sector via a heavy neutrino portal. We explain the underpinning rationale for how loop processes mediated by the portal neutrinos can parametrically dominate over tree-level decay channels, and we demonstrate that this qualitatively changes the indirect detection signals in positrons, neutrinos, and gamma rays.

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“…[26] studied majoron decay caused by the loop-induced couplings to charged fermions. In addition, majoron decay to photons is also possible at two-loop level [27]. While the majoron considered in refs.…”

Section: Introductionmentioning

confidence: 99%

“…While the majoron considered in refs. [25][26][27] is a pseudo-scalar boson, in this work we compute loop-induced interactions for a generic scalar and take three lepton flavors into account, with loop calculation details presented. The loop-induced interactions computed in this work could be of importance in phenomenological studies of long-range forces [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

The νR-philic scalar: its loop-induced interactions and Yukawa forces in LIGO observations

2020

J. High Energ. Phys.

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Right-handed neutrinos (νR) are often considered as a portal to new hidden physics. It is tempting to consider a gauge singlet scalar (ϕ) that exclusively couples to νR via a νRνRϕ term. Such a νR-philic scalar does not interact with charged fermions at tree level but loop-induced effective interactions are inevitable, which are systematically investigated in this work. The magnitude of the loop-induced couplings coincidentally meets the current sensitivity of fifth-force searches. In particular, the loop-induced coupling to muons could be tested in the recent LIGO observations of neutron star mergers as there might be a sizable Yukawa force in the binary system mediated by the νR-philic scalar.

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Majoron at two loops

Cited by 55 publications

References 93 publications

Exploring new physics with O(keV) electron recoils in direct detection experiments

Exploring new physics with O(keV) electron recoils in direct detection experiments

Loop dominated signals from neutrino portal dark matter

The νR-philic scalar: its loop-induced interactions and Yukawa forces in LIGO observations

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