| DATE: |
2008-12-16 11:00 - 12:00 |
| PLACE: |
Kenkyu Honkan 2F RM 220 |
| TITLE: |
Topological Interactions at the LHC and Generalized Landau-Yang Theorem |
| CONTACT: |
tsuda |
| SPEAKER: |
Dr. Jing Shu (IPMU, University of Tokyo) |
| LANGUAGE: |
English |
| ABSTRACT: |
We study the decay of a Z' boson into two Z bosons by extending the Landau-Yang theorem to a parent particle decaying into two Z bosons. For a spin-1 parent the theorem predicts:
1. there are only two possible couplings and
2. the normalized differential cross-section depends on kinematics only through a phase shift in the azimuthal angle between the two decay planes of the Z boson.
When the parent is a Z' the two possible couplings are anomaly-induced and CP-violating, respectively. At the Large Hadron Collider (LHC) effects of the two couplings could be disentangled when both Z bosons decay leptonically.
Reference: W. Y. Keung, I. Low and J. Shu, ``On Decays of Z' into Two Z Bosons and the Landau-Yang Theorem,'' Phys. Rev. Lett. 101, 091802 (2008) [arXiv:0806.2864 [hep-ph]].
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