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22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

Electric Dipole Moment Results from Lattice QCD

Jul 24, 2018, 2:00 PM
103 (Kellogg Hotel and Conference Center)


Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Parallel Weak Decays and Matrix Elements Weak Decays and Matrix Elements


Dr Jack Dragos (FRIB NSCL MSU)


We utilize the gradient flow to define and calculate electric dipole moments (EDMs) induced by the strong QCD $\theta$-term. Since the EDM is highly sensitive to the CP-violating operator induced in the action, the Euclidean time dependence of the topological charge is utilized to improve the signal to noise. The results of the nucleon EDMs are calculated on PACS-CS gauge fields (available from the ILDG) using $N_{f}=2+1$. These gauge fields use a renormalization-group improved gauge action and a non-perturbatively $O(a)$ improved clover quark action. The main calculation was performed on a $32^{3}\times 64$ lattice with lattice spacing $a \simeq 0.09$ fm ($\beta = 1.90$), with pion masses of $m_{\pi} \simeq 411,570,701$ MeV to perform a chiral extrapolation (with $c_{SW} = 1.715$). A second set of calculations were performed with $a\simeq 0.1215,0.0980,0.0685$ fm at $L\approx1.9$ fm for continuum limit studies.

Primary author

Dr Jack Dragos (FRIB NSCL MSU)


Mr Ahmed Yousif (Michigan State University) Andrea Shindler (Michigan State University) Joris De vries Prof. Thomas Luu (Forschungszentrum Jülich/University of Bonn)

Presentation Materials