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Title: One-loop correction to heavy dark matter annihilation

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Publication Date:
Sponsoring Org.:
OSTI Identifier:
Grant/Contract Number:
SC00012567; SC0013999; SC0011090
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 5; Related Information: CHORUS Timestamp: 2017-03-03 22:10:59; Journal ID: ISSN 2470-0010
American Physical Society
Country of Publication:
United States

Citation Formats

Ovanesyan, Grigory, Rodd, Nicholas L., Slatyer, Tracy R., and Stewart, Iain W.. One-loop correction to heavy dark matter annihilation. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.055001.
Ovanesyan, Grigory, Rodd, Nicholas L., Slatyer, Tracy R., & Stewart, Iain W.. One-loop correction to heavy dark matter annihilation. United States. doi:10.1103/PhysRevD.95.055001.
Ovanesyan, Grigory, Rodd, Nicholas L., Slatyer, Tracy R., and Stewart, Iain W.. Fri . "One-loop correction to heavy dark matter annihilation". United States. doi:10.1103/PhysRevD.95.055001.
title = {One-loop correction to heavy dark matter annihilation},
author = {Ovanesyan, Grigory and Rodd, Nicholas L. and Slatyer, Tracy R. and Stewart, Iain W.},
abstractNote = {},
doi = {10.1103/PhysRevD.95.055001},
journal = {Physical Review D},
number = 5,
volume = 95,
place = {United States},
year = {Fri Mar 03 00:00:00 EST 2017},
month = {Fri Mar 03 00:00:00 EST 2017}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.95.055001

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Cited by: 2works
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  • This is part two in a series of papers in which we investigate an approach based on Lagrangian perturbation theory (LPT) to study the non-linear evolution of the large-scale structure distribution in the universe. Firstly, we compute the matter bispectrum in real space using LPT up one-loop order, for both Gaussian and non-Gaussian initial conditions. In the initial position limit, we find that the one-loop bispectrum computed in this manner is identical to its counterpart obtained from standard Eulerian perturbation theory (SPT). Furthermore, the LPT formalism allows for a simple reorganisation of the perturbative series corresponding to the resummation ofmore » an infinite series of perturbations in SPT. Applying this method, we find a resummed one-loop bispectrum that compares favourably with results from N-body simulations. We generalise the resummation method also to the computation of the redshift-space bispectrum up to one loop.« less
  • The next-to-leading order QCD corrections are calculated for the pair annihilation of spin-1 dark matter (DM) by dimensionally regularizing both ultraviolet and infrared singularities in the nonrelativistic (v<<1) limit. The complete O({alpha}{sub s}) correction is about 8% due to the massless gluon contribution. An extra 5% will be added if there is a new interaction from a massive gluon of approximately the same mass as the DM particle. The next-to-leading order QCD correction could result in a sizable shift to the DM mass constrained by relic density measurements.
  • We show that the heavy-quark Yukawa coupling g/sub t/ in the U(1) x SU(2) x SU(3) model has no well controlled infrared asymptotic behavior at the charged-vector-boson scale for three fermion families when 0
  • The neutralino-nucleon ({chi}-tilde{sup 0}-N) scattering is an important process for direct dark matter searches. In this paper we discuss one-loop contributions to the cross section in the winolike and Higgsino-like LSP cases. The neutralino-nucleon scattering mediated by the Higgs {chi}-tilde{sup 0}{chi}-tilde{sup 0} and Z{chi}-tilde{sup 0}{chi}-tilde{sup 0} couplings at tree level is suppressed by the gaugino-Higgsino mixing at tree-level when the neutralino is close to a weak eigenstate. The one-loop contribution to the cross section, generated by the gauge interaction, is not suppressed by any SUSY particle mass or mixing in the wino- and Higgsino-like LSP cases. It may significantly altermore » the total cross section when {sigma}{sub {chi}}{sub -tilde{sup 0}}{sub N}{approx}10{sup -45} cm{sup 2} or less.« less
  • We generalize the renormalized perturbation theory (RPT) formalism of Crocce and Scoccimarro [M. Crocce and R. Scoccimarro, Phys. Rev. D 73, 063519 (2006)] to deal with multiple fluids in the Universe and here we present the complete calculations up to the one-loop level in the RPT. We apply this approach to the problem of following the nonlinear evolution of baryon and cold dark matter (CDM) perturbations, evolving from the distinct sets of initial conditions, from the high redshift post-recombination Universe right through to the present day. In current theoretical and numerical models of structure formation, it is standard practice tomore » treat baryons and CDM as an effective single matter fluid--the so-called dark matter only modeling. In this approximation, one uses a weighed sum of late-time baryon and CDM transfer functions to set initial mass fluctuations. In this paper we explore whether this approach can be employed for high precision modeling of structure formation. We show that, even if we only follow the linear evolution, there is a large-scale scale-dependent bias between baryons and CDM for the currently favored WMAP5 {Lambda}CDM model. This time evolving bias is significant (>1%) until the present day, when it is driven towards unity through gravitational relaxation processes. Using the RPT formalism we test this approximation in the nonlinear regime. We show that the nonlinear CDM power spectrum in the two-component fluid differs from that obtained from an effective mean-mass one-component fluid by {approx}3% on scales of order k{approx}0.05h Mpc{sup -1} at z=10, and by {approx}0.5% at z=0. However, for the case of the nonlinear evolution of the baryons the situation is worse and we find that the power spectrum is suppressed, relative to the total matter, by {approx}15% on scales k{approx}0.05h Mpc{sup -1} at z=10, and by {approx}3%-5% at z=0. Importantly, besides the suppression of the spectrum, the baryonic acoustic oscillation (BAO) features are amplified for baryon and slightly damped for CDM spectra. If we compare the total matter power spectra in the two- and one-component fluid approaches, then we find excellent agreement, with deviations being <0.5% throughout the evolution. Consequences: high precision modeling of the large-scale distribution of baryons in the Universe cannot be achieved through an effective mean-mass one-component fluid approximation; detection significance of BAO will be amplified in probes that study baryonic matter, relative to probes that study the CDM or total mass only. The CDM distribution can be modeled accurately at late times and the total matter at all times. This is good news for probes that are sensitive to the total mass, such as gravitational weak lensing as existing modeling techniques are good enough. Lastly, we identify an analytic approximation that greatly simplifies the evaluation of the full PT expressions, and it is better than <1% over the full range of scales and times considered.« less