Experimental High-Energy Subatomic Particle Physics
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1 Experimental High-Energy Subatomic Particle Physics Andreas Warburton Department of Physics McGill University McGill Explorations 2008 Montréal, Andreas Warburton (McGill) 1
2 Outline Why did I become a Physicist? (A personal story) What is Particle Physics? (The Particle Adventure!) Why is Particle Physics so important? Smallest Particles in the Universe! Humankind s Biggest Scientific Questions! The Wild Side of Physics: Smashing the High-Energy Frontier Fermilab: Today s highest-energy collisions CERN: Soon to shatter all records Highest Energies! Biggest Scientific Experiment of all time! Earth s Biggest Machine! Posters and Pamphlets for you and/or your high school / CEGEP Montréal, Andreas Warburton (McGill) 2
3 Why did I become a Physicist? Questions: Childhood Adolescence Adulthood How did our physical world come about? What is the Universe made of? How do things work? All things. Answers : Parents: radically different approaches religion, atheism, but no physical science! Teachers, High School: many answers, but many more questions! Reductionism: if you understand the pieces, then maybe you can understand the whole!? The Scientific Method The Ultimate Challenge: Physics was my most challenging high-school subject An opportunity to advance the knowledge of Humankind For me, there is nothing cooler. Montréal, Andreas Warburton (McGill) 3
4 Career Path: A Personal Overview Kindergarten Switzerland Public Elementary and High Schools Victoria, British Columbia Bachelor of Science degree University of Victoria Honours Physics Co-op program Masters, Doctoral graduate degrees University of Toronto Experimental high-energy subatomic particle physics Postdoctoral Researcher Cornell University, New York, USA Lab of Nuclear Studies / Lab of Elementary Particle Physics University Professor McGill University, Department of Physics Researcher and Teacher Experimental high-energy subatomic particle physics Always a Student! Chicago, USA; Geneva, Switzerland Montréal, Andreas Warburton (McGill) 4
5 What is Particle Physics? Seeks answers to many questions, including What is the world made of? FUNDAMENTAL PARTICLES What keeps it all together? FUNDAMENTAL FORCES The Particle Adventure: History of the Universe! (see chart) A Blueprint for Everything! The Standard Model (see chart) Like the Periodic Table of Elements, but at a length scale 1 Billion times smaller!! Particles are fundamental (indivisible); are we there yet??? Basic fundamental forces; are they really just the same force??? Montréal, Andreas Warburton (McGill) 5
6 Montréal, Andreas Warburton (McGill) 6
7 Montréal, Andreas Warburton (McGill) 7
8 10 Big Unanswered Questions in Science 1. What is Dark Matter? 2. What is Dark Energy? 3. Why is there so little Antimatter? 4. How do all Particles, including Neutrinos, get their Masses? 5. Where do Ultrahigh-Energy Particles come from? 6. Are there new states of Matter at Ultrahigh Temperatures and Densities? 7. Are Protons unstable? 8. What is Gravity? (or, making peace with Einstein s soul ) 9. Are there additional Dimensions beyond Space and Time? 10.How did the Universe begin and How did we end up here? ALL of these questions can be explored by studying fundamental particles! Montréal, Andreas Warburton (McGill) 8
9 The Tevatron Accelerator: Fermilab Tevatron Matter-Antimatter Collider World s highest-energy operating particle collider Circumference ~6.28 km 1.96 TeV collision energy Montréal, Andreas Warburton (McGill) 9
10 The Experiment: Collider Detector at Fermilab (CDF) Live Collision Events! Montréal, Andreas Warburton (McGill) 10
11 The Next Frontier: ATLAS at the LHC 27 km Large Hadron Collider (LHC) CERN Laboratory, Geneva, Switzerland 14 TeV proton-proton collision energies! ATLAS Experiment First collisions this year! Montréal, Andreas Warburton (McGill) 11
12 Some Interesting Facts about CERN! World s Largest Particle Physics Laboratory! Home of Earth s largest machine, the LHC! Where the World Wide Web (www) was born! Tim Berners-Lee, 1989 See this ents/worldwideweb/www-en.html Angels and Demons Novel by Dan Brown, author of The Da Vinci Code See this D-en.html for the truth Montréal, Andreas Warburton (McGill) 12
13 The ATLAS Experiment Main Public Web Page: Montréal, Andreas Warburton (McGill) 13
14 The ATLAS Detector in the Large Hadron Collider (LHC) Montréal, Andreas Warburton (McGill) 14
15 ATLAS: How it really looks today! ATLAS Live Webcams: At McGill University, we are part of a Canadian team of scientists that is making significant contributions to the ATLAS project. Montréal, Andreas Warburton (McGill) 15
16 Final Remarks: Particle Physics is a personal adventure! can answer some of Humanity s deepest questions! involves many people, big machines, big projects: Collider Detector at Fermilab (CDF) ATLAS Detector at CERN s Large Hadron Collider (LHC) Feel free to take posters and pamphlets for yourself and/or your high school. Call/ me with questions at any time! Montréal, Andreas Warburton (McGill) 16
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