Sommerfeld enhancement from Goldstone pseudo-scalar exchange

Bedaque, Paulo F.; Buchoff, Michael I.; Mishra, Rashmish K.

doi:10.1088/1126-6708/2009/11/046

Cited by 27 publications

(29 citation statements)

References 51 publications

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“…The one-pion-exchange potential has been discussed in the context of DM both regarding a potential Sommerfeld enhancement of DM annihilation [118] and an enhancement of DM self-interactions [119], both references being careful to renormalise the divergences resulting from the singular potential. The conclusion is that resonances can significantly boost the interaction rates at low velocities, even though significant tuning may be required to obtain a sufficiently large momentum transfer cross section in small-velocity systems [119].…”

Section: Dark Matter Self-interactionsmentioning

confidence: 99%

A taste of dark matter: flavour constraints on pseudoscalar mediators

Dolan

Kahlhoefer

McCabe

et al. 2015

J. High Energ. Phys.

215

242

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Dark matter interacting via the exchange of a light pseudoscalar can induce observable signals in indirect detection experiments and experience large self-interactions while evading the strong bounds from direct dark matter searches. The pseudoscalar mediator will however induce flavour-changing interactions in the Standard Model, providing a promising alternative way to test these models. We investigate in detail the constraints arising from rare meson decays and fixed target experiments for different coupling structures between the pseudoscalar and Standard Model fermions. The resulting bounds are highly complementary to the information inferred from the dark matter relic density and the constraints from primordial nucleosynthesis. We discuss the implications of our findings for the dark matter self-interaction cross section and the prospects of probing dark matter coupled to a light pseudoscalar with direct or indirect detection experiments. In particular, we find that a pseudoscalar mediator can only explain the Galactic Centre excess if its mass is above that of the B mesons, and that it is impossible to obtain a sufficiently large direct detection cross section to account for the DAMA modulation.

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Section: Dark Matter Self-interactionsmentioning

confidence: 99%

A taste of dark matter: flavour constraints on pseudoscalar mediators

Dolan

Kahlhoefer

McCabe

et al. 2015

J. High Energ. Phys.

215

242

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“…(11) diverges faster than r −2 , so it is singular and leads to an unbounded Hamilton operator [46]. This is of course not physical, since the potential will ultimately be regularized by UV physics.…”

Section: Sommerfeld Enhanced Scatteringmentioning

confidence: 99%

“…This is of course not physical, since the potential will ultimately be regularized by UV physics. While the boost factor can be made independent of the regularization procedure, it will depend a bit on the UV completion [45,46]. We are just trying to estimate this effect, so we follow the simplified version of the regularization procedure outlined in Ref.…”

Section: Sommerfeld Enhanced Scatteringmentioning

confidence: 99%

Cosmology with self-interacting sterile neutrinos and dark matter: A pseudoscalar model

et al. 2015

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Short baseline neutrino oscillation experiments have shown hints of the existence of additional sterile neutrinos in the eV mass range. Such sterile neutrinos are incompatible with cosmology because they suppress structure formation unless they can be prevented from thermalizing in the early Universe or removed by subsequent decay or annihilation. Here, we present a novel scenario in which both sterile neutrinos and dark matter are coupled to a new, light pseudoscalar. This can prevent thermalization of sterile neutrinos and make dark matter sufficiently self-interacting to have an impact on galactic dynamics and possibly resolve some of the known problems with the standard cold dark matter scenario. Even more importantly it leads to a strongly self-interacting plasma of sterile neutrinos and pseudoscalars at late times and provides an excellent fit to cosmic microwave background data. The usual cosmological neutrino mass problem is avoided by sterile neutrino annihilation to pseudoscalars. The preferred value of H 0 is substantially higher than in standard ΛCDM (lambda cold dark matter) and in much better agreement with local measurements.

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“…From Refs. [23,24], we expect that the dark baryon annihilation receives a Sommerfeld enhancement [25,26] S of order a few due to dark pion exchanges; even S O(10) may occur if parameters such as e D are moderately tuned. We find that the dark baryon can be probed if S O(3) or if CTA slightly outperforms its expected sensitivity.…”

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confidence: 99%

Chiral Dark Sector

Harigaya

Nomura

2017

Phys. Rev. Lett.

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We present a simple and natural dark sector model in which dark matter particles arise as composite states of hidden strong dynamics and their stability is ensured by accidental symmetries. The model has only a few free parameters. In particular, the gauge symmetry of the model forbids the masses of dark quarks, and the confinement scale of the dynamics provides the unique mass scale of the model. The gauge group contains an Abelian symmetry U (1)D, which couples the dark and standard model sectors through kinetic mixing. This model, despite its simple structure, has rich and distinctive phenomenology. In the case where the dark pion becomes massive due to U (1)D quantum corrections, direct and indirect detection experiments can probe thermal relic dark matter which is generically a mixture of the dark pion and the dark baryon, and the Large Hadron Collider can discover the U (1)D gauge boson. Alternatively, if the dark pion stays light due to a specific U (1)D charge assignment of the dark quarks, then the dark pion constitutes dark radiation. The signal of this radiation is highly correlated with that of dark baryons in dark matter direct detection.

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Sommerfeld enhancement from Goldstone pseudo-scalar exchange

Cited by 27 publications

References 51 publications

A taste of dark matter: flavour constraints on pseudoscalar mediators

A taste of dark matter: flavour constraints on pseudoscalar mediators

Cosmology with self-interacting sterile neutrinos and dark matter: A pseudoscalar model

Chiral Dark Sector

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