Discussion Overview
The discussion revolves around the decay modes of the hypothetical particle W', specifically the decay process ##W' \rightarrow \tau \nu## and its comparison to the decay modes ##W' \rightarrow (e/\mu) \nu##. Participants explore the absence of a Jacobian peak in the tau decay mode and the implications of additional neutrinos on the decay spectrum.
Discussion Character
- Debate/contested
- Technical explanation
- Mathematical reasoning
Main Points Raised
- Some participants question why the decay mode ##W' \rightarrow \tau \nu## does not exhibit a Jacobian peak, unlike the decay modes involving electrons or muons.
- It is suggested that the decay of the tau lepton contributes additional missing transverse energy, affecting the observed spectrum.
- One participant proposes that reconstructing the tau could yield a similar peak, but acknowledges that the decay products lead to a different spectrum due to the presence of neutrinos.
- Another participant notes that additional neutrinos can smear out the spectrum, affecting the back-to-back nature of the decay products.
- There is a reference to a figure from a paper that illustrates the expected shapes of the decay spectra, with some participants expressing confusion about the interpretation of the plots.
- One participant discusses the relationship between the coupling constants and the presence of a Jacobian peak, suggesting that the expectation of such a peak may depend on the angle ##\theta_E## related to the couplings of the W' to different generations of particles.
- Participants clarify that the W' is a hypothetical particle predicted by beyond the Standard Model (BSM) theories, and that the discussion is based on simulations rather than observed phenomena.
Areas of Agreement / Disagreement
Participants express differing views on the presence of a Jacobian peak in the decay of W' to tau neutrinos, with some suggesting it is dependent on specific parameters while others remain uncertain about the implications of the decay mechanisms.
Contextual Notes
The discussion includes references to specific figures and papers, indicating a reliance on theoretical models and simulations. There is an acknowledgment of the hypothetical nature of the W' particle and the associated predictions.
Who May Find This Useful
Readers interested in particle physics, particularly those studying beyond the Standard Model theories and decay processes of hypothetical particles, may find this discussion relevant.
