muon vs negative muon

muon and negative muon both are nouns.

Word	Noun	Adjective	Verb	Adverb
muon	Yes	No	No	No
negative muon	Yes	No	No	No

As nouns, muon and negative muon are synonyms defined as:

muon and negative muon: an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino

Other synonyms of muon include mu-meson.

muon (noun)	negative muon (noun)
an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino	an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino