Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-11-17
Phys.Rev.D81:015010,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, 4 figures, PRD version
Scientific paper
10.1103/PhysRevD.81.015010
We discuss general on-shell couplings of a scalar with two Z bosons using an operator analysis. In addition to the operator originated from the Higgs mechanism, two dimension-five operators, one CP-even and one CP-odd, are generated only at the loop-level. Simple formulas are derived for the differential decay distributions when the Z pair subsequently decay into four leptons by computing the helicity amplitudes, from which it is shown the CP-odd operator merely induces a phase shift in the azimuthal angular distribution between the two decay planes of the Z bosons. We also investigate new physics scenarios giving rise to loop-induced decays of a scalar into ZZ pair, and argue that the total decay width of such a scalar would be order-of-magnitude smaller than that of a Higgs boson, should such decays be observed in the early running of the LHC. Therefore, the total decay width alone is a strong indicator of the Higgs nature, or the lack thereof, of a scalar resonance in ZZ final states. In addition, we study the possibility of using the azimuthal angular distribution to disentangle effects among all three operators.
Cao Qing-Hong
Jackson C. B.
Keung Wai-Yee
Low Ian
Shu Jing
No associations
LandOfFree
The Higgs Mechanism and Loop-induced Decays of a Scalar into Two Z Bosons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Higgs Mechanism and Loop-induced Decays of a Scalar into Two Z Bosons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Higgs Mechanism and Loop-induced Decays of a Scalar into Two Z Bosons will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-239935