No-go theorems and GUT

Jul 17, 2012 - We very briefly discuss the role of no-go theorems in constructing models of new physics ... No-go (1): Coleman-Mandula [1] theorem wit...

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contains a triplet but does not contain doublets, and 75 Higgs can connect the 50 Higgs to the¯5 Higgs ...... (∆baI − ∆bbI ) ln (det MI ). + ∑n. (∆an − ∆bn) ln (Λn)=0 ...

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The reps in brackets correspond to a full standard model generation, while the remaining reps are exotic. Thus the exotic fields include left- and right-handed fermions ... ψ(1, 3, ¯3) + ψ(¯3, 1, 3) + ψ(3, ¯3, 1). (2.6). ≡ ψC + ψL + ψR ,.

is erased, since (B − L) = 0. However, recently it has been proposed a modified GUT baryogenesis mechanism which may produce the observed baryon ...

contains a triplet but does not contain doublets, and 75 Higgs can connect the 50 Higgs to the¯5 Higgs through the interaction 50·75·¯5. ...... (∆baI − ∆bbI ) ln (det MI ). + ∑n. (∆an − ∆bn) ln (Λn)=0,. (3.23) ...... Because the te

Aug 29, 2006 - factor, and its rank is lowered by (at least) one unit. .... GSM . Whereas direct breaking is allowed in the supersymmetric case, at least one intermediate symmetry group is needed for unification of the coupling constants ... tion, GG

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Apr 2, 2008 - In this paper, we discuss the idea of resurrecting GUT-baryogenesis [1] in a large class of SO(10) GUTs. Our analysis shows that fast lepton number violating but baryon number conserving processes can partially wash out the GUT- baryoge

C Sivaram. Indian Institute of Astrophysics, Bangalore, 560 034, India. Telephone: +91-80-2553 0672; Fax: +91-80-2553 4043 e-mail: [email protected] Kenath Arun. Christ Junior College, Bangalore, 560 029, India. Telephone: +91-80-4012 9292; Fax: +

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Nov 11, 2016 - 1Theoretical Physics and Cosmology Group, Department of Physics, ... University of Minnesota, Minneapolis, MN 55455,USA ..... Since V/MP ≃ 10−2, these terms can be comparable to the one-loop threshold corrections,.