Of Particular Significance
Conversations About Science with Theoretical Physicist Matt Strassler
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About
About Me
A New Career Phase
About This Site and How to Use It
Articles
Large Hadron Collider FAQ
How We Learn What Happened in a Proton-Proton Collision
Introduction to the LHC
Photos Of The LHC
Some Technical Concepts
Fermions and Bosons
GeV and TeV
Invariant Mass
What are anti-particles?
The Trigger: Discarding All But the Gold
Trigger Failure, and Repair, at the LHC
What’s a Hadron?
What’s a Proton, Anyway?
Checking What’s Inside a Proton
Proton Collisions Vs. Quark/Gluon/Antiquark Mini-Collisions
Large Hadron Collider News
A Historic Day? Or Just an Important One?
Gangbusters!
Hey Where’d My Higgs Go?
Higgs Search: ATLAS and CMS Summer Data Combined
Multi-Lepton Events: A Good Place to Look for New Physics
Old Pages (Of Historical Interest)
The December 2011 Higgs Update
The July 2011 Higgs Hints
Searches for New Phenomena (as of 9/2011)
Searches Aimed at Supersymmetry
Seeking New Particles with Long Lifetimes
Seeking Photons/Zs and Something Undetectable
Triggering: Advances in 2012
Data Parking at CMS
Two-Photons: Data and Theory Disagree
What do current LHC results (mid-August 2011) imply about supersymmetry?
Why so quiet at LHC?
Particle Physics Basics
C, P, T (And Their Combinations)
Cerenkov Radiation
Fields and Their Particles: With Math
1. Ball on a Spring (Classical)
1a. Resonance
2. Ball on a Spring (Quantum)
3. Waves (Classical Form)
4. Waves (Classical Equation of Motion)
4a. Waves (The Quick Calculation)
5. Waves (Quantum)
6. Fields
6a. Chicken and Egg; Matter and Field
7. Particles Are Quanta
7a. How Bosons and Fermions Differ
8. How Particles and Fields Interact (an introduction)
How the Higgs Field Works (with math)
1. The Basic Idea
1. The Basic Idea (1st version)
2. Why the Higgs Field is Non-Zero on Average
3. How the Higgs Particle Arises
4. Why the Higgs Field is Necessary
Mass, Energy, Matter, Etc.
Mass and Energy
How Did Einstein Do It?
Matter and Energy: A False Dichotomy
More on Mass
The Two Definitions of “Mass”, And Why I Use Only One
The Energy That Holds Things Together
Neutron Stability in Atomic Nuclei
Neutrinos
How One Detects Neutrinos
IceCube: A Giant Frozen Neutrino Catcher
Making Neutrino Beams
Neutrino Types and Neutrino Oscillations
Velocity Differences of Neutrinos
Neutrinos Faster Than Light?
OPERA: Additional Supporting Info
OPERA: Comparing the Two Versions
OPERA: Some Arguments Against
Cohen-Glashow: OPERA is Self-Contradictory
OPERA vs ICARUS
OPERA: Another Speed Bump
Supernovas and Neutrino Speeds
OPERA: The First Few Days
OPERA’s Paper: My Initial Reaction
OPERA’s Presentation: My Initial Comments
OPERA: What Went Wrong
How LVD Helped Solve OPERA’s Mystery
Particle Physics: Why do it? And why do it *that* way?
Particle/Anti-Particle Annihilation
Quantum Fluctuations and Their Energy
The Hierarchy Problem
Naturalness and the Standard Model
How to Add 2 Curves
The Known (Apparently-) Elementary Particles
Jets: The Manifestation of Quarks and Gluons
B-tagging: Identifying Jets from Bottom Quarks
Tau Leptons
The Known Particles — If The Higgs Field Were Zero
The Known Forces of Nature
The Strengths of the Known Forces
The Structure of Matter
Atoms: Building Blocks of Molecules
Atoms of an Isotope Are Identical, Literally
Atoms: Their Inner Workings
Isotopes: Variations on an Atom
Electrons: On the Outskirts of Atoms
Protons and Neutrons: The Massive Pandemonium in Matter
The Molecular Structure of Matter
The Nuclei of Atoms: At the Heart of Matter
What Holds Nuclei Together?
Theories and Vacua
Tunneling: A Quantum Process
Virtual Particles: What are they?
Why Do Particles Decay?
Most Particles Decay — But Why?
Most Particles Decay — Yet Some Don’t!
Relativity, Space, Astronomy and Cosmology
Big Bang, Classic Confusions
Black Holes
Black Hole Information Paradox: An Introduction
Dark Matter
Current Hints of Dark Matter (4/13)
Searching for Dark Matter at the LHC
Seeing Signs of Dark Matter Annihilation
History of the Universe
Before Inflation
Big Bang: Expansion, NOT Explosion
Hot Big Bang
Inflation
Dust Thou Art, BICEP2
Some Definitions for Cosmology
Parallax: Seeing in Depth
Reflections on Beauty in Motion
The First Principle of Relativity
Transit of Venus and the Distance to the Sun
Why Do Astronauts Float?
How Strong Is Gravity at the Space Station?
Some Speculative Theoretical Ideas for the LHC
Extra Dimensions
Extra Dimensions – How to Think About Them
Dimensions of Physical Space
What is an “Extra” Dimension? Some Examples
Worlds of 1 Spatial Dimension
Worlds of 2 Spatial Dimensions
How to Look for Signs of Extra Dimensions
Extra Dimensions & Newton’s Gravity
How Big Could an Extra Dimension Be?
Kaluza-Klein Partners — Why? Step 1
Kaluza-Klein Partners — Why? Step 2
Supersymmetry
How to Look for Supersymmetry at the LHC
When The Standard Assumptions About Supersymmetry are Relaxed
Test Page
Supersymmetry — What Is It?
Supersymmetry and Multi-Lepton Events
Where Stands Supersymmetry (as of 12/2013)
Where Stands Supersymmetry (as of 4/2012)?
Tevatron News
A Rare and Interesting Decay of a “B meson” – update 2
Apparent Unexpected Asymmetries in the Production of Quarks
The Higgs Particle
Discovery of the Higgs
Higgs Discovery: Is it a Higgs?
Higgs Discovery: Is it a Simplest Higgs?
Higgs Discovery: Personal Reflections
Higgs Discovery: Skill and A Little Luck
Higgs Discovery: The Data
Holiday Higgs Hints: Confidence-Inspiring or Not?
How The Higgs Field Works
Implications of Higgs Searches (as of 9/2011)
Non-Standard Decays of the Observed Higgs Particle
Higgs Decay to Unknown Spin-One Particles
Higgs Decays to Unknown Spin-Zero Particles
Taking Stock of the “Higgs” (Jan. 2013)
1. Is it a Higgs?
2. Perhaps Composite?
3. A Higgs of Simplest Type?
4. More Than One Higgs?
5. Supersymmetry?
6. Surprises?
The Higgs FAQ 2.0
The Old Higgs FAQ
The Higgs FAQ 1.0
The Standard Model Higgs
Decays of the Standard Model Higgs
Lightweight Higgs: A `Sensitive Creature’
A Quantitative Addendum to the Sensitive Creature
Non-SM h Decays
Table of Decays
Decay to Unusual Jets
Production of the Standard Model Higgs Particle
Seeking and Studying the Standard Model Higgs Particle
Why is it Hard to Find the Higgs Particle?
A Lightweight Standard Model Higgs Particle
Why the Higgs Particle Matters
Why the Higgs Particle Matters (Old Version)
Why The Hints of Higgs Currently Rest on Uncertain Ground
Thoughts on the Scientific Process
Scientific Scepticism Isn’t Just Politics
Why is the Tevatron So Busy with Hints of New Physics?
Movie Clips
New? Start Here
Technical Zone
Test Page
Xotica
Hurriquake 2011: What are the Chances?
Sunrise
Sunrise (older version)
The Grand Si11iness of 11/11/11 11:11:11
Protected: Non-SM h Decays
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