Cern News: LHC Restart

Only two weeks after the first proton injection in 2012, the LHC said yet another record. So we have collisions at 4T, and in all 4 points things have gone very well. Now we try and optimize them and make sure that we can reproduce, we bring the beams into collision. And then we have to spend some time over these couple of days setting up for normal running. And stable beams will be sometimes a wide because we have to do the setup. Just before one o'clock in the morning on Thursday, April 5, the energy record was repeated with stable beams. And necessary condition for the experiments to start their physics program. For the experiment excited about this, in fact, CMS was pushing for increased energy of the machine. And we are very happy that the machine failed safe to go to ATV. We both records every year. We started at 70-EV-2 years ago, about the same time it was great excitement. I remember that in 2010, and now we're going to keep in higher energy, which is even more exciting. Of course, and all the changes in energy is not so dramatic as we saw two years ago. It's only about 15% higher than we were in for the last two years. This 15% actually translated in a very big increase in reach for new massive particles. If you want to produce something very massive, you need a lot of energy. And we increased the energy only by 15% for some of the particles. The gain in the probably we took producing them on the number of particles you produced could be as many as factor 3 or 5 or even 10. With the increased beam energy, the rate which Higgs bosons if they exist will be produced is increased, but also the rate of some of the major backgrounds are increased. So there are pros and cons. Extracting data from collisions at 8, terrylecton-balled in the center of mass, one beasy for the LHC experiments. In the new data, we know that we will have many proton collision superimposed on the beam crossing. Last year we were having from 15 to 20 at maximum. This year we will go over 30. This is a big challenge. The major difference is that via the link is very advanced detectors, which have literally hundreds of millions of channels of electronics. We have to make sure that the detectors properly working. That's the basics. People in this room, you see they are actually working on calibrating the detector and understanding and preparing for the collisions. That's the most important part of our job without there to be one health physics results. The benefits of operating the experiments at ATV are definitely worth the challenges though. As 2012, promises to be a year of discovery for the LHC. From our calculation and studies, we think that one unit of data, one inverse front-to-band, is worth about 25 to 30 percent more at ATV than at 70V. So it's like you're going on a journey with ATV, you're getting there slightly faster. We will be going that bit faster, so we should see get answers a bit quicker. Although nobody can predict exactly where this journey is leading, the physics community around the LHC agrees on the primary goal for 2012. While the major goal of the experiment, perhaps the major goal for these years, the Higgs boson, we would like to discover the Higgs boson if it's there or close the existence of the standard model Higgs boson. We met no know what ATV is going to bring, but we can certainly say that 2012 physics season has just started with a grand opening.