In order to enable an iCal export link, your account needs to have an API key created. This key enables other applications to access data from within Indico even when you are neither using nor logged into the Indico system yourself with the link provided. Once created, you can manage your key at any time by going to 'My Profile' and looking under the tab entitled 'HTTP API'. Further information about HTTP API keys can be found in the Indico documentation.
Additionally to having an API key associated with your account, exporting private event information requires the usage of a persistent signature. This enables API URLs which do not expire after a few minutes so while the setting is active, anyone in possession of the link provided can access the information. Due to this, it is extremely important that you keep these links private and for your use only. If you think someone else may have acquired access to a link using this key in the future, you must immediately create a new key pair on the 'My Profile' page under the 'HTTP API' and update the iCalendar links afterwards.
Permanent link for public information only:
Permanent link for all public and protected information:
(Uppsala University), Viktor Thorén
The BESIII experiment in Beijing, China has collected a sample of 5 billion J/psi events, the world's largest of its kind. Through primarily the radiative decay of J/psi, roughly 25 million eta' are produced. This has opened up for many first measurements of its decays and high precision studies of branching ratios and decay dynamics.
One such decay, eta' -> pi+ pi- e+ e-, offers several interesting avenues of research. A measurement of its branching ratio provides a test of predictions from low energy effective field theories such as Chiral Perturbation Theory, or Vector Meson Dominance. In addition, this decay probes an unconventional, beyond standard model CP-violation which is not constrained by measurements of the nEDM. If it exists, such a CP-violation will be manifested as an asymmetry in the angle between the decay planes of pi+pi- and e+e-.
In this seminar, I will present my ongoing analysis of eta' -> pi+pi-e+e- using data from BESIII, with the goal of measuring the branching ratio and CP-violating asymmetry.