Please read these instructions before posting any event on Fermilab Indico

Indico search will be reestablished in the next version upgrade of the software:


This search is only for public events. Restricted events are not available.


IMPORTANT! Indico has been upgraded. Please let us know as soon as possible if you find any issues and email

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

The strange quark contribution to the spin of the nucleon

Jul 25, 2018, 5:10 PM
106 (Kellogg Hotel and Conference Center)


Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Hadron Structure Hadron Structure


Dr Roger Horsley (University of Edinburgh)


Quark line disconnected matrix elements of an operator, such as the axial current, are difficult to compute on the lattice. The standard method uses a stochastic estimator of the operator, which is very noisy. We discuss and further develop our alternative approach using the Feynman-Hellmann theorem which involves only evaluating two-point correlation functions. This is applied to computing the contribution of the quark spin to the nucleon and in particular for the strange quark.

Primary author

Dr Roger Horsley (University of Edinburgh)

Presentation Materials