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Effective Field Theory and Inelastic Dark Matter Results from XENON1T

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Lindner,  M.
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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2210.07591.pdf
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Citation

Aprile, E., Abe, K., Agostini, F., Maouloud, S. A., Althueser, L., Andrieu, B., et al. (2022). Effective Field Theory and Inelastic Dark Matter Results from XENON1T. arXiv, 2210.07591.


Cite as: https://hdl.handle.net/21.11116/0000-000C-1F1A-6
Abstract
In this work, we expand on the XENON1T nuclear recoil searches to study the
individual signals of dark matter interactions from operators up to
dimension-eight in a Chiral Effective Field Theory (ChEFT) and a model of
inelastic dark matter (iDM). We analyze data from two science runs of the
XENON1T detector totaling 1\,tonne$\times$year exposure. For these analyses, we
extended the region of interest from [4.9, 40.9]$\,$keV$_{\text{NR}}$ to [4.9,
54.4]$\,$keV$_{\text{NR}}$ to enhance our sensitivity for signals that peak at
nonzero energies. We show that the data is consistent with the background-only
hypothesis, with a small background over-fluctuation observed peaking between
20 and 50$\,$keV$_{\text{NR}}$, resulting in a maximum local discovery
significance of 1.7\,$\sigma$ for the Vector$\otimes$Vector$_{\text{strange}}$
($VV_s$) ChEFT channel for a dark matter particle of 70$\,$GeV/c$^2$, and
$1.8\,\sigma$ for an iDM particle of 50$\,$GeV/c$^2$ with a mass splitting of
100$\,$keV/c$^2$. For each model, we report 90\,\% confidence level (CL) upper
limits. We also report upper limits on three benchmark models of dark matter
interaction using ChEFT where we investigate the effect of isospin-breaking
interactions. We observe rate-driven cancellations in regions of the
isospin-breaking couplings, leading to up to 6 orders of magnitude weaker upper
limits with respect to the isospin-conserving case.