Comments on: What made those tracks? http://www.quantumdiaries.org/2011/05/08/what-made-those-tracks/ Thoughts on work and life from particle physicists from around the world. Tue, 21 May 2013 13:32:18 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: Anna Phan http://www.quantumdiaries.org/2011/05/08/what-made-those-tracks/#comment-41667 Anna Phan Thu, 15 Dec 2011 09:50:10 +0000 http://blogs.uslhc.us/?p=7219#comment-41667 Dear Christopher,

Yes, all the particles of the Standard Model are produced in the LHC collisions. The way each of the detectors goes about identifying the particles depends on what physics they are targeting. LHCb needs to be able to identify mesons well and hence has the RICH subdetectors. With regards to the Higgs, it is identified from its decay products, electrons, muons, photons and jets. These are things which ATLAS and CMS identify and measure very well.

Cheers,
Anna

]]> By: Christopher http://www.quantumdiaries.org/2011/05/08/what-made-those-tracks/#comment-39564 Christopher Sat, 10 Dec 2011 05:38:45 +0000 http://blogs.uslhc.us/?p=7219#comment-39564 Presumably all elements of the Standard Model are produced by the LHC in its range of experiments. Does this mean that there’s a specific detector for each of them along the lines of the two RICH detectors? What are the ket detectors for the Higgs?

]]> By: Zara http://www.quantumdiaries.org/2011/05/08/what-made-those-tracks/#comment-7900 Zara Sat, 02 Jul 2011 10:08:57 +0000 http://blogs.uslhc.us/?p=7219#comment-7900 RICH 2 is more vulnerable than RICH 1. The materials and factors are very effective in RICH 2. RICH 2 particle gives more strong signal than RICH 1. Very useful and important post.

]]> By: michelscofield http://www.quantumdiaries.org/2011/05/08/what-made-those-tracks/#comment-7640 michelscofield Thu, 23 Jun 2011 16:54:45 +0000 http://blogs.uslhc.us/?p=7219#comment-7640 RICH 2 looks more accurate than RICH 1, thank you for this particle detection news and looking forward for your next update.

]]> By: Anna Phan http://www.quantumdiaries.org/2011/05/08/what-made-those-tracks/#comment-5788 Anna Phan Tue, 17 May 2011 17:31:48 +0000 http://blogs.uslhc.us/?p=7219#comment-5788 My next entry will actually be about the many uses of magnets at the LHC, so stay tuned!

]]> By: Amir http://www.quantumdiaries.org/2011/05/08/what-made-those-tracks/#comment-5787 Amir Tue, 17 May 2011 17:28:31 +0000 http://blogs.uslhc.us/?p=7219#comment-5787 How does knowing the magnetic deflection of a particle tell you its momentum? Doesn’t this also depend on the electric charge?

]]> By: Anna Phan http://www.quantumdiaries.org/2011/05/08/what-made-those-tracks/#comment-5686 Anna Phan Mon, 16 May 2011 08:34:20 +0000 http://blogs.uslhc.us/?p=7219#comment-5686 The RICH system provides good particle identification over the entire momentum range. RICH1 is more for low momenta particles and RICH2 for higher momenta particles. For example, the average efficiency for kaon identification for momenta between 2 and 100GeV/c is ε(K → K) ∼95%, with a corresponding average pion misidentification rate ε(π → K) ∼5%. Around 30 GeV/c the identification probability is ∼97% and the misidentification probability ∼5%.

]]> By: Zara http://www.quantumdiaries.org/2011/05/08/what-made-those-tracks/#comment-5631 Zara Sun, 15 May 2011 15:47:49 +0000 http://blogs.uslhc.us/?p=7219#comment-5631 But my question is, Are the particles determined correctly?? RICH 2 detector is very effective than RICH 1 I think. And the post is very informative because I didn’t know it before.

]]>