The Weak Mixing Angle From TeV Scale Quark-Lepton Unification | Zendy

Zackaria Chacko | Zendy; Lawrence J. Hall | Zendy; Maxim Perelstein | Zendy

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The Weak Mixing Angle From TeV Scale Quark-Lepton Unification

Author(s) -

Zackaria Chacko,

Lawrence J. Hall,

Maxim Perelstein

Publication year - 2003

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2003/01/001

Subject(s) - physics , weinberg angle , compactification (mathematics) , particle physics , quark , mixing (physics) , grand unified theory , lepton , scale (ratio) , logarithm , supersymmetry , nuclear physics , mathematics , quantum mechanics , mathematical analysis , electron , pure mathematics

Unified theories based on an extended left-right symmetric group, $SU(4)\times SU(2)^4$, are constructed in five dimensions. The compactification scaleis assumed to be only a loop factor above the weak scale, so that the weakmixing angle is predicted to be close to its tree level value of 0.239.Boundary conditions in the 5th dimension break $SU(4) \to SU(3) \timesU(1)_{B-L}$, removing powerful constraints from $K_L \to \mu e$ while allowinga reliable calculation of the leading logarithm corrections to $\sin^2 \theta$.The compactification scale is expected in the 1--5 TeV region, depending on how$SU(2)^4$ is broken. Two illustrative models are presented, and theexperimental signal of the $Z'$ gauge boson is discussed.Comment: 15 page

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