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.
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I show how to construct an approximate expression for the cross section for Higgs production in gluon fusion at NNNLO with finite top mass, exploiting existing knowledge on its singularity structure in Mellin space. I show how the dominant and some subdominant singularities can be extracted from Sudakov and BFKL resummation, and I use them to construct approximate results up to NNNLO. By comparing to known exact NLO and NNLO results I show that this method works quite well, and specifically better than other existing approximations.
I present a prediction for the total cross section, and show that the NNNLO leads to a correction to the NNLO result of order 15%, which substantially reduces its scale dependence.