Newbie saying Hi

Jojo52

Junior Member

Joined: Jul 2020

Posts: 8
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#1

Newbie saying Hi

27th July 2020, 17:31:PM

Hey all,

I guess for many like myself, joining here doesn't mean great things as we need strong advice for our problems but I really hope I can also contribute what I can. Will post up an issue I'm having soon

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Celestine

Site Owner

Joined: May 2007

Posts: 7268
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#2

27th July 2020, 17:37:PM

Welcome, hopefully we can help with whatever issue you're having.

"Although scalar fields are Lorentz scalars, they may transform nontrivially under other symmetries, such as flavour or isospin. For example, the pion is invariant under the restricted Lorentz group, but is an isospin triplet (meaning it transforms like a three component vector under the SU(2) isospin symmetry). Furthermore, it picks up a negative phase under parity inversion, so it transforms nontrivially under the full Lorentz group; such particles are called pseudoscalar rather than scalar. Most mesons are pseudoscalar particles." (finally explained to a captivated Celestine by Professor Brian Cox on Wednesday 27th June 2012 )

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