CERN SPS now running as 540‐GeV $p̄p$ collider

The CERN Super Proton Synchrotron (SPS) has begun producing ultra‐high‐energy physics results in its new role as a proton–antiproton colliding‐beam accelerator. At the 2nd Topical Workshop on Forward Collider Physics, held in December at the University of Wisconsin (Madison), two CERN collaborations reported their early data on $p̄p$ collisions at a center‐of‐mass energy of 540 GeV.