Despina Hatzifotiadou: ALICE Master Class 3 - Theory: strangeness enhancement; centrality of lead-lead collisions; efficiency, yield, background etc

<!--HTML--><p>This is the 3rd of 4 short online videos. It explains what is: strangeness enhancement; centrality of lead-lead collisions; efficiency, yield, background etc. More details and related links on this indico event page.</p> <p>In more detail: What is Physics Master Classes</p> <p>Students after morning lectures, run programmes in the afternoon to do measurements. These tutorials are about how to use the software required to do these measurements.</p> <p>Background info and examples&nbsp; Looking for strange particles with ALICE <a href="http://aliceinfo.cern.ch/Public/MasterCL/MasterClassWebpage.html">http://aliceinfo.cern.ch/Public/MasterCL/MasterClassWebpage.html</a></p> <ol> <li>Introduction to first part of the exercise : what are strange particles, V0 decays, invariant mass.</li> <li>Demonstration of the software for the 1st part of the exercise - visual identification of V0s</li> <li>Introduction to second part of the exercise : strangeness enhancement; centrality of lead-lead collisions; explanation of efficiency, yield, background etc</li> <li>Demonstration of the software for the 2nd part of the exercise - invariant mass spectra - background subtraction and calculation of number of Kaons, Lambdas, antiLambdas.</li> </ol> <p>This use case was present in the original e-learning project description <a href="http://it-student-projects.web.cern.ch/projects/e-learning-modules">http://it-student-projects.web.cern.ch/projects/e-learning-modules</a></p> <p>This recording was done with <strong>quicktime</strong> on Despina&#39;s Mac.</p> <p>If you have a problem to display this video please write to e-learning dot support at CERN with your OS and browser name/version.</p> <p>&nbsp;</p>