{
  "$mulmocast": { "version": "1.1" },
  "lang": "en",
  "title": "The Higgs Boson — Exploring the Origin of Mass",
  "slideParams": {
    "theme": {
      "colors": {
        "bg": "0B1120",
        "bgCard": "162032",
        "bgCardAlt": "1E2D45",
        "text": "F0F4F8",
        "textMuted": "A0AEC0",
        "textDim": "4A5568",
        "primary": "63B3ED",
        "accent": "B794F4",
        "success": "68D391",
        "warning": "F6AD55",
        "danger": "FC8181",
        "info": "4FD1C5",
        "highlight": "F687B3"
      },
      "fonts": { "title": "Georgia", "body": "Calibri", "mono": "Consolas" }
    }
  },
  "imageParams": {
    "images": {
      "detector": {
        "type": "imagePrompt",
        "prompt": "A massive cylindrical particle detector at CERN, showing intricate layers of sensors and electronics in warm orange and gold lighting, photorealistic, wide-angle view from inside the detector barrel"
      },
      "lhc": {
        "type": "imagePrompt",
        "prompt": "The Large Hadron Collider tunnel at CERN, a long curved underground tunnel with blue superconducting magnets stretching into the distance, cool blue lighting, photorealistic"
      },
      "higgs_event": {
        "type": "imagePrompt",
        "prompt": "A colorful particle collision event display from the CMS detector at CERN, showing radiating particle tracks in green, red and blue lines emanating from a central collision point on a dark background, scientific visualization style"
      }
    }
  },
  "beats": [
    {
      "text": "What is the Higgs boson? Let's look back at the history of its discovery.",
      "image": {
        "type": "slide",
        "slide": {
          "layout": "title",
          "title": "The Higgs Boson",
          "subtitle": "A Journey to the Origin of Mass",
          "author": "Introduction to Particle Physics"
        }
      }
    },
    {
      "text": "The Higgs boson holds a special place in the Standard Model.",
      "image": {
        "type": "slide",
        "slide": {
          "layout": "columns",
          "title": "Particles of the Standard Model",
          "subtitle": "17 Elementary Particles",
          "columns": [
            {
              "title": "Fermions",
              "accentColor": "primary",
              "content": [
                { "type": "imageRef", "ref": "detector", "alt": "Fermion interactions" },
                { "type": "bullets", "items": ["Quarks (6 types)", "Leptons (6 types)"], "icon": "⚛" },
                { "type": "text", "value": "Particles that make up matter", "dim": true }
              ]
            },
            {
              "title": "Bosons",
              "accentColor": "accent",
              "content": [
                { "type": "imageRef", "ref": "lhc", "alt": "LHC tunnel" },
                { "type": "bullets", "items": ["Photon", "W & Z bosons", "Gluon"], "icon": "⚡" },
                { "type": "text", "value": "Force-carrying particles", "dim": true }
              ]
            },
            {
              "title": "Higgs Boson",
              "accentColor": "highlight",
              "content": [
                { "type": "imageRef", "ref": "higgs_event", "alt": "Higgs boson decay" },
                { "type": "text", "value": "Origin of Mass", "bold": true, "color": "highlight" },
                { "type": "text", "value": "The only scalar particle. Discovered at CERN in 2012.", "dim": true }
              ]
            }
          ]
        }
      }
    },
    {
      "text": "Let's look at the Higgs boson decay event captured by the LHC detector.",
      "image": {
        "type": "slide",
        "slide": {
          "layout": "split",
          "left": {
            "title": "CMS Detector Event",
            "content": [{ "type": "imageRef", "ref": "detector", "alt": "CMS detector event display", "fit": "cover" }]
          },
          "right": {
            "title": "What Are We Seeing?",
            "content": [
              { "type": "text", "value": "Protons are collided at near light speed, and the resulting particle tracks are captured by the detector." },
              {
                "type": "callout",
                "text": "The Higgs boson cannot be observed directly — its existence is inferred from pairs of decay particles.",
                "label": "Key Point",
                "color": "info",
                "style": "info"
              },
              { "type": "metric", "value": "125 GeV", "label": "Mass of the Higgs boson" }
            ]
          }
        }
      }
    },
    {
      "text": "A comparison of the ATLAS and CMS experiments.",
      "image": {
        "type": "slide",
        "slide": {
          "layout": "comparison",
          "title": "Two Experiments, One Discovery",
          "subtitle": "Each independently achieved 5σ significance",
          "left": {
            "title": "ATLAS Experiment",
            "accentColor": "primary",
            "content": [
              { "type": "imageRef", "ref": "detector", "alt": "ATLAS detector" },
              { "type": "metric", "value": "5.9σ", "label": "Statistical significance", "color": "primary" },
              { "type": "text", "value": "25m diameter, 46m long. About 3,000 physicists participated." }
            ]
          },
          "right": {
            "title": "CMS Experiment",
            "accentColor": "accent",
            "content": [
              { "type": "imageRef", "ref": "lhc", "alt": "CMS detector" },
              { "type": "metric", "value": "5.0σ", "label": "Statistical significance", "color": "accent" },
              { "type": "text", "value": "More compact but equipped with a superconducting solenoid magnet. About 4,000 participants." }
            ]
          },
          "callout": {
            "text": "The simultaneous confirmation by two independent experiments dramatically increased confidence in the result",
            "color": "success"
          }
        }
      }
    },
    {
      "text": "Here's a grid overview of CERN's key facilities.",
      "image": {
        "type": "slide",
        "slide": {
          "layout": "grid",
          "title": "CERN Experimental Facilities",
          "subtitle": "The world's largest particle physics laboratory on the Swiss-French border",
          "gridColumns": 2,
          "items": [
            {
              "title": "LHC Accelerator",
              "accentColor": "primary",
              "content": [
                { "type": "imageRef", "ref": "lhc", "alt": "LHC tunnel", "fit": "cover" },
                { "type": "text", "value": "27km circumference, 100m underground", "dim": true }
              ]
            },
            {
              "title": "ATLAS Detector",
              "accentColor": "accent",
              "content": [
                { "type": "imageRef", "ref": "detector", "alt": "ATLAS detector overview", "fit": "cover" },
                { "type": "text", "value": "25m diameter, weighing 7,000 tonnes", "dim": true }
              ]
            },
            {
              "title": "CMS Detector",
              "accentColor": "info",
              "content": [
                { "type": "imageRef", "ref": "higgs_event", "alt": "CMS detector", "fit": "cover" },
                { "type": "text", "value": "Features superconducting solenoid", "dim": true }
              ]
            },
            {
              "title": "CERN Control Centre",
              "accentColor": "warning",
              "content": [
                { "type": "imageRef", "ref": "detector", "alt": "CERN control room", "fit": "cover" },
                { "type": "text", "value": "24/7 accelerator monitoring", "dim": true }
              ]
            }
          ]
        }
      }
    },
    {
      "text": "Here are the key milestones leading to the discovery.",
      "image": {
        "type": "slide",
        "slide": {
          "layout": "timeline",
          "title": "Road to Discovery",
          "items": [
            { "date": "1964", "title": "Higgs Mechanism Proposed", "description": "P. Higgs et al. published the mass acquisition theory", "done": true },
            { "date": "1983", "title": "W & Z Bosons Discovered", "description": "Confirmed at CERN's SPS experiments", "done": true, "color": "accent" },
            {
              "date": "2008",
              "title": "LHC Begins Operation",
              "description": "The world's largest particle accelerator starts up",
              "done": true,
              "color": "info"
            },
            {
              "date": "2012.7.4",
              "title": "Higgs Boson Discovered",
              "description": "ATLAS and CMS experiments announce simultaneously",
              "done": true,
              "color": "highlight"
            },
            { "date": "2013", "title": "Nobel Prize in Physics", "description": "Awarded to Higgs and Englert", "done": true, "color": "success" }
          ]
        }
      }
    },
    {
      "text": "Let's explore the relationship between the Higgs field and mass.",
      "image": {
        "type": "slide",
        "slide": {
          "layout": "split",
          "left": {
            "title": "Visualizing the Higgs Field",
            "content": [
              { "type": "imageRef", "ref": "higgs_event", "alt": "Higgs field concept", "fit": "contain" },
              { "type": "text", "value": "A field that fills all of space", "dim": true, "align": "center" }
            ]
          },
          "right": {
            "title": "Why Does Mass Arise?",
            "content": [
              {
                "type": "callout",
                "text": "The Higgs field exists everywhere in the universe. Particles acquire mass by interacting with this field.",
                "style": "quote"
              },
              { "type": "divider", "color": "accent" },
              {
                "type": "bullets",
                "items": [
                  "Photon: no interaction with Higgs field → zero mass",
                  "W boson: strong interaction → heavy",
                  "Top quark: strongest interaction → heaviest"
                ],
                "icon": "→"
              },
              { "type": "callout", "text": "Mass = strength of coupling to the Higgs field", "label": "Key Insight", "color": "highlight" }
            ]
          }
        }
      }
    },
    {
      "text": "Let's look at the statistical significance of the discovery in numbers.",
      "image": {
        "type": "slide",
        "slide": {
          "layout": "stats",
          "title": "The Higgs Discovery in Numbers",
          "stats": [
            { "value": "5σ", "label": "Statistical significance", "color": "highlight" },
            { "value": "125.25 GeV", "label": "Measured mass" },
            { "value": "~10⁻²² s", "label": "Lifetime" },
            { "value": "10,000+", "label": "Researchers involved", "color": "info" }
          ],
          "callout": {
            "text": "5σ means the probability of a fluke is 1 in 3.5 million — the threshold for 'discovery' in particle physics.",
            "color": "warning"
          }
        },
        "reference": "Source: CERN Annual Report 2024 — https://home.cern/resources/report"
      }
    }
  ]
}