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SUMMARY:Determination of topological charge following several definitions
DTSTART;VALUE=DATE-TIME:20160725T133500Z
DTEND;VALUE=DATE-TIME:20160725T135500Z
DTSTAMP;VALUE=DATE-TIME:20190825T022730Z
UID:indico-contribution-2552@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Julien Frison (KEK Theory Center)\nOn the lattice\,
many definitions of the topological charge $Q$ coexist\, and can give very
different numbers on a given configuration. \nThose definitions will only
converge when one takes the continuum limit of the moments $\\langle Q^n\
\rangle$ (provided that $Q$ has been correctly renormalised). \nAdditional
ly\, other complications arise when one wants to study the mass dependence
of the topological susceptibility\, because of the mixing of the two oper
ators under renormalisation. It is therefore unclear to which extent each
definition of $Q$ is compatible with each definition of the masses. \nHere
we will present the results of some tests following various choices of de
finition. In a second part\, we will discuss the potential consequences of
that ambiguity on the discarding of $m_u=0$ as a solution to the strong $
CP$ problem.\n\nhttps://conference.ippp.dur.ac.uk/event/470/contributions/
2552/
LOCATION:Highfield Campus\, University of Southampton Building 67 Room 100
3
URL:https://conference.ippp.dur.ac.uk/event/470/contributions/2552/
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