Journal
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
Volume 22, Issue 28, Pages 5117-5120Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217751X07037342
Keywords
physics beyond Standard Model; exotica; field theory with continuously distributed mass
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We point out that the notion of an unparticle, recently introduced by Georgi, can be interpreted as a particular case of a field with continuously distributed mass considered in Phys. Lett. B 325, 430 (1994). We also point out that the simplest renormalizable extension of the SUc(3) circle times SUL(2) circle times U(1) Standard Model is the extension with the replacement of the U(1) gauge propagator 1/k(2) -> 1/k(2) + integral(infinity)(0) rho(t)/-t+k(2)+i epsilon dt with integral(infinity)(0) rho(t)dt < infinity.
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