SMS scnews item created by Zhou Zhang at Thu 5 Apr 2012 1802
Type: Seminar
Distribution: World
Expiry: 26 Apr 2012
Calendar1: 10 Apr 2012 1200-1300
CalLoc1: Carslaw 352
Auth: zhangou@bari.maths.usyd.edu.au

# Mathematical Physics Seminar: Chaichian -- CPT and Lorentz Invariance: Their Relation and Violation

Speaker: Prof. Masud Chaichian (University of Helsinki)

http://www.helsinki.fi/~www_sefo/chaichian/

Time: Tuesday, April 10rd, 12(NOON)--1PM

Room: Carslaw 352

Lunch: after the talk

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Title:  CPT and Lorentz Invariance: Their Relation and
Violation

Abstract: in a CPT-violating but Lorentz-invariant
interacting quantum field theory, elementary particles,
such as leptons, quarks, Higgs, their supersymmetric
partners, and their  antiparticles remain identical
even after the quantum corrections are taken into
account. Thus the CPT invariance is not the responsible
symmetry for the equality of the masses of an elementary
particle and its antiparticle -- it is the Lorentz
invariance. At the same time, if there exists a CPT
violating interaction in Nature,  for composite
particles such as p-\bar{p}, \pi^+-\pi^-, K0-\bar{K0},
etc., as well as for bound states, such as
hydrogen-antihydrogen, there are differences in their
masses, due to different bound-state energies, in
their total widths (life-times) and magnetic moments.
Therefore, the experimental measurements on the latter
characteristics of composite particles or bound systems
would reveal the existence of a CPT-violating theory,
although the theory is Lorentz invariant.

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