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Pré-Publication, Document De Travail Année : 2020

Ab-initio calculation of the proton and the neutron's scalar couplings for new physics searches

Sz. Borsanyi
  • Fonction : Auteur
Z. Fodor
  • Fonction : Auteur
C. Hoelbling
  • Fonction : Auteur
L. Lellouch
K.K. Szabo
  • Fonction : Auteur

Résumé

Many low-energy, particle-physics experiments seek to reveal new fundamental physics by searching for very rare scattering events on atomic nuclei. The interpretation of their results requires quantifying the non-linear effects of the strong interaction on the spin-independent couplings of this new physics to protons and neutrons. Here we present a fully-controlled, ab-initio calculation of these couplings to the quarks within those constituents of nuclei. We use lattice quantum chromodynamics computations for the four lightest species of quarks and heavy-quark expansions for the remaining two. We determine each of the six quark contributions with an accuracy better than 15%. Our results are especially important for guiding and interpreting experimental searches for our universe's dark matter.

Dates et versions

hal-02905896 , version 1 (23-07-2020)

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Sz. Borsanyi, Z. Fodor, C. Hoelbling, L. Lellouch, K.K. Szabo, et al.. Ab-initio calculation of the proton and the neutron's scalar couplings for new physics searches. 2020. ⟨hal-02905896⟩
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