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Title: Velocity independent constraints on spin-dependent DM-nucleon interactions from IceCube and PICO

Abstract

Adopting the Standard Halo Model (SHM) of an isotropic Maxwellian velocity distribution for dark matter (DM) particles in the Galaxy, the most stringent current constraints on their spin-dependent scattering cross-section with nucleons come from the IceCube neutrino observatory and the PICO-60 C$$_3$$F$$_8$$ superheated bubble chamber experiments. The former is sensitive to high energy neutrinos from the self-annihilation of DM particles captured in the Sun, while the latter looks for nuclear recoil events from DM scattering off nucleons. Although slower DM particles are more likely to be captured by the Sun, the faster ones are more likely to be detected by PICO. Recent N-body simulations suggest significant deviations from the SHM for the smooth halo component of the DM, while observations hint at a dominant fraction of the local DM being in substructures. We use the method of Ferrer et al. (2015) to exploit the complementarity between the two approaches and derive conservative constraints on DM-nucleon scattering. Our results constrain $$\sigma_{\mathrm{SD}} \lesssim 10^{-39} \mathrm{cm}^2$$ ($$10^{-38} \mathrm{cm}^2$$) at $$\gtrsim 90\%$$ C.L. for a DM particle of mass 1~TeV annihilating into $$\tau^+ \tau^-$$ ($$b\bar{b}$$) with a local density of $$\rho_{\mathrm{DM}} = 0.3~\mathrm{ GeV/cm}^3$$. The constraints scale inversely with $$\rho_{\mathrm{DM}}$$ and are independent of the DM velocity distribution.

Authors:
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
IceCube; PICO
OSTI Identifier:
1556966
Report Number(s):
FERMILAB-PUB-19-381-AE; arXiv:1907.12509
1746683
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
TBD
Additional Journal Information:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Aartsen, M. G., and et al. Velocity independent constraints on spin-dependent DM-nucleon interactions from IceCube and PICO. United States: N. p., 2019. Web.
Aartsen, M. G., & et al. Velocity independent constraints on spin-dependent DM-nucleon interactions from IceCube and PICO. United States.
Aartsen, M. G., and et al. Mon . "Velocity independent constraints on spin-dependent DM-nucleon interactions from IceCube and PICO". United States. https://www.osti.gov/servlets/purl/1556966.
@article{osti_1556966,
title = {Velocity independent constraints on spin-dependent DM-nucleon interactions from IceCube and PICO},
author = {Aartsen, M. G. and et al.},
abstractNote = {Adopting the Standard Halo Model (SHM) of an isotropic Maxwellian velocity distribution for dark matter (DM) particles in the Galaxy, the most stringent current constraints on their spin-dependent scattering cross-section with nucleons come from the IceCube neutrino observatory and the PICO-60 C$_3$F$_8$ superheated bubble chamber experiments. The former is sensitive to high energy neutrinos from the self-annihilation of DM particles captured in the Sun, while the latter looks for nuclear recoil events from DM scattering off nucleons. Although slower DM particles are more likely to be captured by the Sun, the faster ones are more likely to be detected by PICO. Recent N-body simulations suggest significant deviations from the SHM for the smooth halo component of the DM, while observations hint at a dominant fraction of the local DM being in substructures. We use the method of Ferrer et al. (2015) to exploit the complementarity between the two approaches and derive conservative constraints on DM-nucleon scattering. Our results constrain $\sigma_{\mathrm{SD}} \lesssim 10^{-39} \mathrm{cm}^2$ ($10^{-38} \mathrm{cm}^2$) at $\gtrsim 90\%$ C.L. for a DM particle of mass 1~TeV annihilating into $\tau^+ \tau^-$ ($b\bar{b}$) with a local density of $\rho_{\mathrm{DM}} = 0.3~\mathrm{ GeV/cm}^3$. The constraints scale inversely with $\rho_{\mathrm{DM}}$ and are independent of the DM velocity distribution.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {7}
}