The quintuplet annihilation spectrum

Baumgart, Matthew; Rodd, Nicholas L.; Slatyer, Tracy R.; Vaidya, Varun

doi:10.1007/jhep01(2024)158

Cited by 4 publications

(2 citation statements)

References 79 publications

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“…We remind the reader that our results are expected to be more robust because we use a newer version of Pythia with a more refined shower algorithm that is tuned to data relevant to DM. 11 The comparison with the spectra of HDMS shows much bigger differences. In fact, the spectra of all the particles show a similar trend in the right-hand part of the peak while in the left-hand part there is a cutoff in the HDMS results.…”

Section: Jcap03(2024)035mentioning

confidence: 99%

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CosmiXs: cosmic messenger spectra for indirect dark matter searches

Arina,

Di Mauro,

Fornengo

et al. 2024

J. Cosmol. Astropart. Phys.

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The energy spectra of particles produced from dark matter (DM) annihilation or decay are one of the fundamental ingredients to calculate the predicted fluxes of cosmic rays and radiation searched for in indirect DM detection. We revisit the calculation of the source spectra for annihilating and decaying DM using the Vincia shower algorithm in Pythia to include QED and QCD final state radiation and diagrams for the EW corrections with massive bosons, not present in the default Pythia shower model. We take into account the spin information of the particles during the entire EW shower and the off-shell contributions from massive gauge bosons. Furthermore, we perform a dedicated tuning of the Vincia and Pythia parameters to LEP data on the production of pions, photons, and hyperons at the Z resonance and discuss the underlying uncertainties. To enable the use of our results in DM studies, we provide the tabulated source spectra for the most relevant cosmic messenger particles, namely antiprotons, positrons, γ rays and the three neutrino flavors, for all the fermionic and bosonic channels and DM masses between 5 GeV and 100 TeV, on github.

show abstract

Section: Jcap03(2024)035mentioning

confidence: 99%

“…However, when DM particles couple to the SM gauge bosons, EW ISR can provide a sizeable contribution to the final spectra, see e.g. [5][6][7][8][9][10][11]. In general, ISR exhibits a degree of model dependence.…”

Section: Jcap03(2024)035mentioning

confidence: 99%

CosmiXs: cosmic messenger spectra for indirect dark matter searches

Arina,

Di Mauro,

Fornengo

et al. 2024

J. Cosmol. Astropart. Phys.

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Enhancement of p-wave dark matter annihilation by quasi-bound states

Beneke,

Binder,

De Ros

et al. 2024

J. High Energ. Phys.

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We scrutinize the Sommerfeld enhancement in dark matter pair annihilation for p-wave and higher-ℓ partial waves. For the Yukawa potential these feature a super-resonant Breit-Wigner peak in their velocity-dependence close to Sommerfeld resonances as well as a universal scaling with velocity for all ℓ ≥ 1 that differs from the s-wave case. We provide a quantum mechanical explanation for these phenomena in terms of quasi-bound states sustained by the centrifugal barrier of the partial-wave potential, and give approximate WKB expressions capturing the main effects. The impact of quasi-bound states is exemplified for wino dark matter and models with light mediators, with a focus on indirect detection signals. We note that quasi-bound states can also explain similar peaks in the bound-state formation and self-scattering cross sections.

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Effective field theories for dark matter pairs in the early universe: center-of-mass recoil effects

Biondini,

Brambilla,

Qerimi

et al. 2024

J. High Energ. Phys.

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For non-relativistic thermal dark matter, close-to-threshold effects largely dominate the evolution of the number density for most of the times after thermal freeze-out, and hence affect the cosmological relic density. A precise evaluation of the relevant interaction rates in a thermal medium representing the early universe includes accounting for the relative motion of the dark matter particles and the thermal medium. We consider a model of dark fermions interacting with a plasma of dark gauge bosons, which is equivalent to thermal QED. The temperature is taken to be smaller than the dark fermion mass and the inverse of the typical size of the dark fermion-antifermion bound states, which allows for the use of non-relativistic effective field theories. For the annihilation cross section, bound-state formation cross section, bound-state dissociation width and bound-state transition width of dark matter fermion-antifermion pairs, we compute the leading recoil effects in the reference frame of both the plasma and the center-of-mass of the fermion-antifermion pair. We explicitly verify the Lorentz transformations among these quantities. We evaluate the impact of the recoil corrections on the dark matter energy density. Our results can be directly applied to account for the relative motion of quarkonia in the quark-gluon plasma formed in heavy-ion collisions. They may be also used to precisely assess thermal effects in atomic clocks based on atomic transitions; the present work provides a first field theory derivation of time dilation for these processes in vacuum and in a medium.

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The quintuplet annihilation spectrum

Cited by 4 publications

References 79 publications

CosmiXs: cosmic messenger spectra for indirect dark matter searches

CosmiXs: cosmic messenger spectra for indirect dark matter searches

Enhancement of p-wave dark matter annihilation by quasi-bound states

Effective field theories for dark matter pairs in the early universe: center-of-mass recoil effects

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