Search for long-lived neutral particles in pp collisions at s√=13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter

This paper describes a search for pairs of neutral, long-lived particles decaying in the ATLAS calorimeter. Long-lived particles occur in many extensions to the Standard Model and may elude searches for new promptly decaying particles. The analysis considers neutral, long-lived scalars with masses between 5 and 400 GeV, produced from decays of heavy bosons with masses between 125 and 1000 GeV, where the long-lived scalars decay into Standard Model fermions. The analysis uses either 10.8 fb−1 or 33.0 fb−1 of data (depending on the trigger) recorded in 2016 at the LHC with the ATLAS detector in proton–proton collisions at a centre-of-mass energy of 13 TeV. No significant excess is observed, and limits are reported on the production cross section times branching ratio as a function of the proper decay length of the long-lived particles

Intake and digestibility of brown-midrib corn silage by lactating dairy cows.

Two short trials in 2 yr evaluated brown midrib-3 (bm3) mutant (low lignin) corn silage for Holstein cows in early lactation. In trial 1, five Holstein cows per group (bm3 or normal genetic counterpart) were fed individually a ration of corn silage and grain (60:40, dry matter) from wk 2 through wk 8 postcalving. Cows fed the bm3 ration consumed 19% more digestible dry matter and energy as a percent of body weight than cows fed the normal ration. Digestibilities of most components were 2 to 4 percentage units higher for thebm3 ration. Milk yield was not different between rations, but cows fed bm3 lost less body weight. In trial 2, five Holstein cows per group were fed individually a ration of either bm3 or normal silage supplemented with a concentrate mix at 85:15 silage to concentrate. The concentrate mix was formulated to meet needs for protein, minerals, and vitamins. Cows were on trial from wk 6 through wk 13 postcalving. All measures of daily intake of dry matter were greater for the bm3 ration while digestibilities of some components were reduced slightly. Digestible energy intake was 27% greater for the bm3 ration. Milk and milk component yields did not differ, but cows fed the bm3 ration gained more body weight