{
  "id": 379904,
  "title": "Number of particles interactions in an event and typical speeds of particles. ",
  "url": "/competitions/icecube-neutrinos-in-deep-ice/discussion/379904",
  "author_name": "",
  "post_date": "2023-01-21T14:55:26.941998800Z",
  "votes": 2,
  "comment_count": 1,
  "views": 0,
  "content": "<p>I wonder about the physics behind the detection. Since IceCube detected Cherenkov radiation I guess that the particles ejected have speeds higher than that of light in ice. How common is it that an ejected proton is the cause of the Cherenkov radiation and how common does it come from secondary particles (or even later in the chain)?</p>\n<p>What are the typical speeds of protons and neutrons ejected? What are the speed and type of secondary particles created by these nucleons?</p>",
  "messages": [
    {
      "id": "2109638",
      "postDate": "01/21/2023 14:55:26",
      "content": "<p>I wonder about the physics behind the detection. Since IceCube detected Cherenkov radiation I guess that the particles ejected have speeds higher than that of light in ice. How common is it that an ejected proton is the cause of the Cherenkov radiation and how common does it come from secondary particles (or even later in the chain)?</p>\n<p>What are the typical speeds of protons and neutrons ejected? What are the speed and type of secondary particles created by these nucleons?</p>",
      "rawMarkdown": "I wonder about the physics behind the detection. Since IceCube detected Cherenkov radiation I guess that the particles ejected have speeds higher than that of light in ice. How common is it that an ejected proton is the cause of the Cherenkov radiation and how common does it come from secondary particles (or even later in the chain)?\n\nWhat are the typical speeds of protons and neutrons ejected? What are the speed and type of secondary particles created by these nucleons?",
      "votes": null
    },
    {
      "id": "2110794",
      "postDate": "01/22/2023 12:39:20",
      "content": "<p>Charged particles that are relativistic will emit Cherenkov radiation. Depending on the neutrino interaction, there are leptons and/or hadron in the showers, and these typically have a different light yield.<br>\nPlease find much more information in the many publications too if interested!</p>",
      "rawMarkdown": "Charged particles that are relativistic will emit Cherenkov radiation. Depending on the neutrino interaction, there are leptons and/or hadron in the showers, and these typically have a different light yield.\nPlease find much more information in the many publications too if interested!",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 2110794,
      "author_name": "pellerphys",
      "author_url": "",
      "post_date": "01/22/2023 12:39:20",
      "content": "<p>Charged particles that are relativistic will emit Cherenkov radiation. Depending on the neutrino interaction, there are leptons and/or hadron in the showers, and these typically have a different light yield.<br>\nPlease find much more information in the many publications too if interested!</p>",
      "votes": null,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "2109638": "I wonder about the physics behind the detection. Since IceCube detected Cherenkov radiation I guess that the particles ejected have speeds higher than that of light in ice. How common is it that an ejected proton is the cause of the Cherenkov radiation and how common does it come from secondary particles (or even later in the chain)?\n\nWhat are the typical speeds of protons and neutrons ejected? What are the speed and type of secondary particles created by these nucleons?",
    "2110794": "Charged particles that are relativistic will emit Cherenkov radiation. Depending on the neutrino interaction, there are leptons and/or hadron in the showers, and these typically have a different light yield.\nPlease find much more information in the many publications too if interested!"
  },
  "source": "meta"
}