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Impact of nucleon matrix element uncertainties on the interpretation of direct and indirect dark matter search results
High Energy Physics - Phenomenology · Submitted 25 Jul 2013
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We find that the interpretation of dark matter search results from direct detection experiments is more sensitive to the choice of the central values of the hadronic inputs than the results of indirect search experiments.
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The abstract, sentence by sentence
We study in detail the impact of the current uncertainty in nucleon matrix elements on the sensitivity of direct and indirect experimental techniques for dark matter detection. We perform two scans in the framework of the cMSSM: one using recent values of the pion-sigma term obtained from Lattice QCD, and the other using values derived from experimental measurements. The two choices correspond to extreme values quoted in the literature and reflect the current tension between different ways of obtaining information about the structure of the nucleon. All other inputs in the scans, astrophysical and from particle physics, are kept unchanged. We use two experiments, XENON100 and IceCube, as benchmark cases to illustrate our case. We find that the interpretation of dark matter search results from direct detection experiments is more sensitive to the choice of the central values of the hadronic inputs than the results of indirect search experiments. The allowed regions of cMSSM parameter space after including XENON100 constrains strongly differ depending on the assumptions on the hadronic matrix elements used. On the other hand, the constraining potential of IceCube is almost independent of the choice of these values.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We study in detail the impact of the current uncertainty in nucleon matrix elements on the sensitivity of direct and indirect experimental techniques for dark matter detection. | contribution 0.99 | 0.86 | 0.06 | asserted 0.86 |
| s1 | We perform two scans in the framework of the cMSSM: one using recent values of the pion-sigma term obtained from Lattice QCD, and the other using values derived from experimental measurements. | method 0.96 | 0.94 | 0.03 | asserted 0.99 |
| s2 | The two choices correspond to extreme values quoted in the literature and reflect the current tension between different ways of obtaining information about the structure of the nucleon. | method 0.53 | 0.11 | 0.03 | asserted 0.99 |
| s3 | All other inputs in the scans, astrophysical and from particle physics, are kept unchanged. | method 0.99 | 0.84 | 0.02 | asserted 0.99 |
| s4 | We use two experiments, XENON100 and IceCube, as benchmark cases to illustrate our case. | method 0.98 | 0.80 | 0.02 | asserted 0.99 |
| s5 | We find that the interpretation of dark matter search results from direct detection experiments is more sensitive to the choice of the central values of the hadronic inputs than the results of indirect search experiments. | result 0.99 | 0.96 | 0.83 | asserted 1.00 |
| s6 | The allowed regions of cMSSM parameter space after including XENON100 constrains strongly differ depending on the assumptions on the hadronic matrix elements used. | result 0.99 | 0.92 | 0.20 | asserted 1.00 |
| s7 | On the other hand, the constraining potential of IceCube is almost independent of the choice of these values. | result 1.00 | 0.92 | 0.15 | asserted 1.00 |
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The paper
Original abstract
We study in detail the impact of the current uncertainty in nucleon matrix elements on the sensitivity of direct and indirect experimental techniques for dark matter detection. We perform two scans in the framework of the cMSSM: one using recent values of the pion-sigma term obtained from Lattice QCD, and the other using values derived from experimental measurements. The two choices correspond to extreme values quoted in the literature and reflect the current tension between different ways of obtaining information about the structure of the nucleon. All other inputs in the scans, astrophysical and from particle physics, are kept unchanged. We use two experiments, XENON100 and IceCube, as benchmark cases to illustrate our case. We find that the interpretation of dark matter search results from direct detection experiments is more sensitive to the choice of the central values of the hadronic inputs than the results of indirect search experiments. The allowed regions of cMSSM parameter space after including XENON100 constrains strongly differ depending on the assumptions on the hadronic matrix elements used. On the other hand, the constraining potential of IceCube is almost independent of the choice of these values.
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How the literature uses it
8 arXiv papers cite this in 8 sentences
Papers citing it · 5 sentences without a confident label
Uses its data or values 1 paper
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We do not consider the uncertainties related to the pion nucleon sigma term $σ_πn$, kept fixed to most recent value from lattice simulations [ref] , and we refer the interested reader to e.g. [ref] .
Multi-lepton signatures at LHC from sneutrino dark matter · Constraints and Observables · 0.94
Cites it as background 2 papers
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For a detailed explanation about the contributions of the light quarks to the mass and the matrix elements of the axial-vector currents see Refs. [ref] .
Dark Matter Phenomenology: Sterile Neutrino Portal and Gravitational Portal in Extra-Dimensions · Spin-Independent Cross-Section · 0.98
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For a recent discussion of the discrepancy between the two approaches and the impact of the resulting uncertainties on predictions for the detectability of SUSY with direct and indirect detection experiments, see Ref. [ref] .
Profile likelihood maps of a 15-dimensional MSSM · Nuisance parameters and astrophysical quantities · 0.94
What it cites · 4 sentences without a confident label
Uses data or values from 3 papers
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The Lattice world average gives a value of 0.043$±$0.011 for $f_Ts^N$ [ref] , while one obtains $f_Ts^N=0.046 ±0.013$ from recent data from the CHAOS spectrometer [ref] .
Evaluation of the Pion-Nucleon Sigma Term from CHAOS Data · The WIMP-nucleon cross section and nucleon matrix elements · 0.90
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The Lattice world average gives a value of 0.043$±$0.011 for $f_Ts^N$ [ref] , while one obtains $f_Ts^N=0.046 ±0.013$ from recent data from the CHAOS spectrometer [ref] .
The Scalar Strange Content of the Nucleon from Lattice QCD · The WIMP-nucleon cross section and nucleon matrix elements · 0.90
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We use the recent PLANCK value $Ω_χh^2 = 0.1196 ±0.0031$ [ref] and we add a fixed 10% theoretical uncertainty in quadrature.
Planck 2013 results. XVI. Cosmological parameters · Experimental constraints · 1.00
Cites as background 1 paper
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Recent parameter scans of different supersymmetric scenarios, including the present work, include uncertainties in the estimation of the local dark matter density and velocity dispersion, as well as in nuclear physics quantities, like in the hadronic nucleon matrix elements [ref] .
Dark matter and collider signatures of the MSSM · Introduction · 0.85
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