Particle Physics Seminar

"Direct CP violation and the Delta I=1/2 rule in K to pi pi decay from the Standard Model"

Presented by Christopher Kelly, BNL

Thursday, June 25, 2020, 3:00 pm — Webcast

I discuss our recent publication [arXiv:2004.09440] of a lattice QCD calculation of the ΔI=1/2, K→ππ decay amplitude A0 and ?′, the measure of direct CP-violation in K→ππ decay. This quantity is highly sensitive to new sources of CP violation that might help to explain the matter/antimatter asymmetry in the observable Universe. This calculation dramatically improves on our 2015 results [Phys.Rev.Lett. 115 (2015) 21, 212001], including nearly four times the statistics and numerous technical improvements allowing us to more reliably isolate the ππ ground-state and more accurately relate the lattice operators to those defined in the Standard Model. Join Zoom Meeting https://cern.zoom.us/j/94462510754?pwd=Ri9ZUFRIaFFnMFFEMThPeDFzUFJiUT09 Meeting ID: 944 6251 0754 Password: 540367 One tap mobile +41432107042,,94462510754# Switzerland +41432107108,,94462510754# Switzerland Dial by your location +41 43 210 70 42 Switzerland +41 43 210 71 08 Switzerland +41 31 528 09 88 Switzerland +33 1 7037 9729 France +33 7 5678 4048 France +33 1 7037 2246 France Meeting ID: 944 6251 0754 Find your local number: https://cern.zoom.us/u/a8kjRRik8 Join by SIP 94462510754@188.184.85.92 94462510754@188.184.89.188 Join by H.323 188.184.85.92 188.184.89.188 Meeting ID: 944 6251 0754 Password: 540367

Hosted by: Viviana Cavaliere

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