منابع مشابه
Rare Z Decays ∗ a † Gad
The central role played by rare decays on our understanding of elementary particle physics, is well known, where “rare” stands here for Flavor Changing Neutral Currents (FCNC), which are either small or practically vanishing in the SM. Some highlights: are: 1. In K physics: The first appearance of charm in loops from which mc ≈ 1.5 GeV was predicted [2]. 2. In B physics: The importance of b → s...
متن کاملNew physics effects in rare Z decays
Virtual effects induced by new physics in rare Z decays are reviewed. Since the expected sensitivity of the giga–Z linear collider is of the order of 10, we emphasize the importance of any new physics effect that gives a prediction above this limit. It is also pointed out that an improvement on the known experimental constraints on rare Z decays will provide us with a critical test of the valid...
متن کاملRare Decays of the Z-Boson
We study radiative decay modes of the Z-boson into heavy quark bound states. We find that the widths for these decays are extremely small. We conclude that these decays will not be detectable for the time being unless there is a significant increase in the number of Z-bosons produced at the electronpositron colliders. Rare decays of the Z-boson have recently been studied at the ee colliders, CE...
متن کاملRare Z Boson Decays to a Hidden Sector
We demonstrate that rare decays of the Standard Model Z boson can be used to discover and characterize the nature of new hidden-sector particles. We propose new searches for these particles in soft, high-multiplicity leptonic final states at the Large Hadron Collider. The proposed searches are sensitive to low-mass particles produced in Z decays, and we argue that these striking signatures can ...
متن کاملConstraints on neutrino - photon interactions from rare Z decays
It is shown that the rare decays Z → ν ¯ νγ and Z → ν ¯ νγγ are useful to put model-independent bounds on neutrino-one-photon and neutrino-two-photon interactions. The results are then used to constrain the τ neutrino magnetic moment µ ντ and the double radiative decay ν j → ν i γγ. It is found that the decay Z → ν ¯ νγ gives a more stringent bound on µ ντ than that obtained from Z → ν ¯ νγγ; t...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1986
ISSN: 0370-2693
DOI: 10.1016/0370-2693(86)90312-6