Restart the LHC

[casper]

Restart the LHC
In both directions particles will start to travel next month, but with twice the power of those in which scientists at the LHC discovered God particle

Large Hadron Collider (LHC) was re-launched and two years after, due to the repair, extinguished. Protons re-circulate through the machine 27 kilometers long and located beneath the French-Swiss border.

In both directions particles will start to travel next month, but with twice the power of those in which scientists at the LHC discovered Higgs boson known as the God Particle.

 

[MusicMan]

There was a lot of fears that this device would create a black hole when it was operating before.
This seemed to be confirmed when it was mysteriously shut down.
Now, here it comes again.

 

[casper]

The Large Hadron Collider has smashed protons together for the first time since early 2013.
Link:
http://www.bbc.com/news/science-environment-32590036

 

[casper]

The CMS (Compact Muon Solenoid) and LHCb (Large Hadron Collider beauty) collaborations at CERN’s Large Hadron Collider in Switzerland report the first observation of an extremely rare decay of the Bs0 particle – a heavy composite particle consisting of a bottom antiquark and a strange quark – into two muons
Link:
http://www.sci-news.com/physics/science-cern-bs0-meson-02800.html

 

[Human]

The CMS (Compact Muon Solenoid) and LHCb (Large Hadron Collider beauty) collaborations at CERN’s Large Hadron Collider in Switzerland report the first observation of an extremely rare decay of the Bs0 particle – a heavy composite particle consisting of a bottom antiquark and a strange quark – into two muons
Link:
http://www.sci-news.com/physics/science-cern-bs0-meson-02800.html

Just a note that analysis is done on data from Run I (2011 & 2012).

The findings, published in the journal Nature, are based on data taken at the LHC in 2011 and 2012. These data also contain early hints of a similar, but even more rare decay into two muons of the B0, a cousin of the Bs0.

Here's the distribution (histogram) of two muons invariant mass showing the observation (from Nature article):

Superimposed on the data points in black are the combined fit (solid blue line) and its components: the Bs0 (yellow shaded area) and B0 (light-blue shaded area) signal components; the combinatorial background (dash-dotted green line); the sum of the semi-leptonic backgrounds (dotted salmon line); and the peaking backgrounds (dashed violet line). The horizontal bar on each histogram point denotes the size of the binning, while the vertical bar denotes the 68% confidence interval. See main text for details on the weighting procedure.

added: What I see on this histogram really is only one peak in data, not two - corresponding to 2 particles, and humongous error bars in the peak region.

edit: added histogram description from the article

 

[Human]

It's been reported that LHC proton beams collided at 13 TeV.

Last night, protons collided in the Large Hadron Collider (LHC) at the record-breaking energy of 13 TeV for the first time. These test collisions were to set up systems that protect the machine and detectors from particles that stray from the edges of the beam.
A key part of the process was the set-up of the collimators. These devices which absorb stray particles were adjusted in colliding-beam conditions. This set-up will give the accelerator team the data they need to ensure that the LHC magnets and detectors are fully protected.
Today the tests continue. Colliding beams will stay in the LHC for several hours. The LHC Operations team will continue to monitor beam quality and optimisation of the set-up.
This is an important part of the process that will allow the experimental teams running the detectors ALICE, ATLAS, CMS and LHCb to switch on their experiments fully. Data taking and the start of the LHC's second run is planned for early June.

EventDisplay images of these collisions from all 4 experiments can be found in that same article.