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UT Arlington PHYS 1443 - PHYS 1443 Lecture Notes

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PHYS 1443 Section 001 Lecture 1 Tuesday May 30 2006 Dr Jaehoon Yu Who am I How is this class organized What is Physics What do we want from this class Brief history of physics Standards and units Dimensional Analysis Fundamentals One Dimensional Motion Today s homework is homework 1 due 7pm this Friday Tuesday May 30 2006 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 1 Announcements Reading assignment 1 Read and follow through all sections in appendices A and B by Thursday June 1 There will be a quiz on Thursday June 1 on this reading assignment Tuesday May 30 2006 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 2 Who am I Name Dr Jaehoon Yu You can call me Dr Yu Office Rm 342 Chemistry and Physics Building Extension x22814 E mail jaehoonyu uta edu My profession High Energy Physics HEP Collide particles protons on anti protons or electrons on anti electrons positrons at the energies equivalent to 10 000 Trillion degrees To understand Fundamental constituents of matter Interactions or forces between the constituents Origin of Mass Creation of Universe Big Bang Theory A pure scientific research activity Direct use of the fundamental laws we find may take longer than we want but Indirect product of research contribute to every day lives eg WWW Tuesday May 30 2006 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 3 Structure of Matter Matter Molecule Atom Nucleus Baryon Quark Hadron u 10 14m 10 9m 10 10m 10 2m Condensed matter Nano Science Chemistry Atomic Physics Nuclear Physics 10 15m protons neutrons mesons etc 10 19m top bottom charm strange up down Electron Lepton 10 18m High Energy Physics Tuesday May 30 2006 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 4 The Standard Model Assumes the following fundamental structure Discovered in 1995 Directly observed in 2000 Tuesday May 30 2006 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 5 Fermilab Tevatron and LHC at CERN Present world s Highest Energy proton anti proton collider Ecm 1 96 TeV 6 3x10 7J p 13M Joules on 10 4m2 Equivalent to the kinetic energy of a 20t truck at a speed 80 mi hr World s Highest Energy protonproton collider in 2 years Ecm 14 TeV 44x10 7J p 1000M Joules on 10 4m2 Equivalent to the kinetic energy of a 20t truck at a speed 212 mi hr Chicago CDF p Tevatron Tuesday May 30 2006 D p PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 6 D Detector ATLAS Detector 30 30 50 Weighs 5000 tons Can inspect 3 000 000 collisions second Will record 50 collisions second Records approximately 10 000 000 bytes second Recording 0 5x1015 500 000 000 000 000 bytes per year 0 5 PetaBytes Tuesday May 30 2006 Weighs 10 000 tons Can inspect 1 000 000 000 collisions second Will record 100 collisions second Records approximately 300 000 000 bytes second Will record 1 5x1015 1 500 000 000 000 000 bytes each year 1 5 PetaByte PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 7 D Central Calorimeter 1990 Tuesday May 30 2006 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 8 CH FH Highest ET dijet event at D hadrons EM K q g Time parton jet particle jet calorimeter jet How does an Event Look in a Collider Detector E1T 475 GeV 1 0 69 p p Tuesday May 30 2006q E1T 472 GeV 2 0 69 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 9 Information Communication Source My web page http www hep uta edu yu Contact information Class Schedule Syllabus Homework Holidays and Exam days Evaluation Policy Class Style Communication Other information Primary communication tool is e mail Register for PHYS1443001 SUMMER06 e mail distribution list as soon possible Instruction available in Class style Communication 5 points extra credit if done by next Monday June 5 3 points extra credit if done by next Wednesday June 7 Office Hours 10 00 11 00am Mondays Wednesdays and Thursdays or by appointments Tuesday May 30 2006 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 10 Evaluation Policy Term Exams 45 Total of two exams 6 15 and 6 30 Both exams will be used for the final grade Each will constitute 22 5 of the total Missing an exam is not permissible unless pre approved No makeup test You will get an F if you miss any of the exams without a prior approval 100 Lab score 20 Homework 25 Pop quizzes 10 Extra credits 10 of the total Random attendances Strong participation in the class discussions Other many opportunities Will be on sliding scale unless everyone does very well Tuesday May 30 2006 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 11 Homeworks Solving homework problems is the only way to comprehend class material An electronic homework system has been setup for you Details are in the material distributed today and on the web https hw utexas edu studentInstructions html Download homework 1 1 problem attempt to solve it and submit it You will receive a 100 credit for HW 1 Roster will close Friday June 2 Each homework carries the same weight ALL homework grades will be used for the final grade Home work will constitute 25 of the total A good way of keeping your grades high Strongly encouraged to collaborate Does not mean you can copy Tuesday May 30 2006 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 12 Attendances and Class Style Attendances Will be taken randomly Will be used for extra credits Class style Lectures will be on electronic media The lecture notes will be posted on the web AFTER each class Will be mixed with traditional methods Active participation through questions and discussions are STRONGLY encouraged Extra credit Tuesday May 30 2006 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 13 Why do Physics To understand nature through experimental observations Exp and measurements Research Establish limited number of fundamental laws usually with mathematical expressions Theory Predict the nature s course Theory and Experiment work hand in hand Theory works generally under restricted conditions Discrepancies between experimental measurements and theory are good for improvements Improves our everyday lives though some laws can take a while till we see amongst us Tuesday May 30 2006 PHYS 1443 001 Summer 2006 Dr Jaehoon Yu 14 Models Theories and Laws Models A kind of analogy or mental image of a phenomena in terms of something we are familiar with Often provides insights for new experiments and ideas Theories More systematically improved version of models Can provide quantitative predictions that are testable and more precise Laws Certain concise but general statements about how nature behaves The statement must be found experimentally valid Principles Less general statements of how nature behaves Has some level of arbitrariness Tuesday May 30 2006 PHYS 1443 001


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UT Arlington PHYS 1443 - PHYS 1443 Lecture Notes

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