Kurt Riesselmann

Kurt Riesselmann is a senior writer in the Fermilab Office of Communication.

The combined Tevatron results exclude the existence of a Higgs particle with a mass between 100-108 and 156-177 GeV/c2. For the range 110-155 GeV/c2, the experiments are now extremely close to the sensitivity needed (dotted line below 1) either to see a substantial excess of Higgs-like events or to rule out the existence of the particle. The small excess of Higgs-like events observed by the Tevatron experiments in the range from 120 to 155 (see solid curve) is not yet…

Rhianna Wisniewski teaches new Fermilab Today editor Ashley WennersHerron how to put together the publication. Publishing a daily newsletter about life at a particle physics laboratory might intimidate a lot of people. For new Fermilab Today editor Ashley WennersHerron, it is an “opportunity to learn about physics and be close to where science is happening.” WennersHerron succeeds Rhianna Wisniewski, who will fill a vacant position in the Fermilab Office of Communication. In her new role, Wisniewski will focus on web…

The T2K experiment has detected six candidate events for oscillations of muon neutrinos into electron neutrinos. In this graphic, each colored dot shows the light detected when an electron neutrino hit a water molecule inside the Super-Kamiokande detector and created an electron that led to the emission of Cerenkov light. The T2K experiment sends a beam of muon neutrinos from the J-PARC facility 295 kilometers through the earth to the Super-Kamiokande neutrino detector. A near detector measures the purity of…

The DZero collaboration found its data for the production of a W boson and two jets to be in agreement with the predictions by the Standard Model. The red peak below 100 GeV/c2 is a well-known Standard Model feature of the decays of W and Z bosons. If the CDF excess is interpreted as a new particle, the dotted line shows what such a particle would look like in the DZero detector. The DZero data shows no excess around 145…

The cleanup of the MINOS cavern and the rest of the Soudan Underground Laboratory is complete. Two months after a fire broke out in the access shaft of the Soudan mine, the Soudan Underground Laboratory is again open for operation. Safety officers inspected the mine and laboratory last week and issued a permit for normal occupancy. The officers identified a short list of additional repairs, which will be carried out in the upcoming months. Work also continues on the Soudan…

The head frame of the Soudan Underground Mine in April 2009. Photo: Reidar Hahn, Fermilab Scientists are making progress with their assessment of the status of the CDMS and MINOS experiments in the Soudan Underground Laboratory, following a fire on March 17 in the access shaft of the Soudan mine. But power is still out in the MINOS cavern due to a damaged power feed into the laboratory. Scientists inspected the MINOS detector on Wednesday. They found residue of fire-fighting…

This photo, taken in 2004, shows the CDMS experiment in the Soudan Underground Laboratory. Ten days after a mine access shaft fire shut down the Soudan Underground Laboratory, the first scientists returned to the laboratory as electricians began to restore power to the laboratory. It was the first time that lights in the laboratory were back on since March 17, when a fire protection system shut down the power to the entire laboratory because of a fire in the access…