New Constraint on the Existence of the Decay, Phys. Rev. Lett 110, 201801 (2013)

Below is a list of questions to consider when reading this article. At the end of the article, there will be a chance to summarize what you think are the main ideas of the article. Completing this assignment is entirely optional but encouraged and you can submit them to me through email (kimsiang84@sjtu.edu.cn).

How can the process occurs within the Standard Model (SM) if including neutrino oscillation?

What are the New Physics Models predicted to enhance the branching ratio of ?

What is the branching ratio of this process in the Standard Model and what are the typical range predicted by Beyond the Standard Model physics?

What is the signature of the signal event?

What are the main background processes in the SM?

Explain how the muon beam is being produced for this experiment.

What are the main detectors of the MEG experiment?

How were the MEG detectors calibrated?

How was the energy resolution of the positron detector evaluated?

Explain how the photon and positron events are being reconstructed.

Is pileup event important for this analysis? How did they treat pileup events?

How did they translate the estimated number of signal events into a signal branching ratio?

What are the main systematic uncertainties of the measurement?

What is the final result from the MEG experiment?

What is the goal of the MEG II experiment?

Summary

How would you summarize this article in: a) one paragraph, b) one sentence?