Dear Colleagues, dear Members of the EP Department and CERN Users,

Welcome to the autumn edition of the newsletter of the EP department. The EP newsletter is meant to inform all members of the department about what is going on in EP, and to showcase some of the highlights of our work. Did you know that counting all members of the department we would easily exceed 13,000?

The categories of members of the department are students, fellows, staff, project associates, scientific associates, trainees, etc. adding up to more than 1000, plus all the CERN users who are at present more than 12,000.

The present newsletter is as usual a mixture of highlights from the experiments – this time with articles about the photon-photon scattering seen in ATLAS, the amazing improvement of the measurement of the proton mass by a factor of three using BASE experiments expertise dealing with protons and antiprotons and the first measurement of the hyperfine splitting in anti-Hydrogen by ALPHA.

If you missed the conference yourself you will further find a summary of the EPS-HEP 2017 in Venice and from other conferences and workshops.

Enjoy also reading the stories from summer students of this year.

Finally, I would also like to congratulate the winners of the Nobel Prize in physics, announced a few days ago. Rainer Weiss, Kip Thorne and Barry Barish received the prize for the discovery of gravitational waves. If you missed it, you may go back to the EP newsletter from June 2017 to read an interview with Kip Thorne.

Manfred Krammer

EP Department Head