Higgs Hunters Talk

Sniveling Beginner, almost conscious, now confused

  • PattyD by PattyD

    So, do we
    Note green lines, whether or not they start in the center?
    How about the white lines at peculiar angles and non-central starting points?


  • ElisabethB by ElisabethB moderator

    Hi PattyD

    First of ,no need to mark single white lines ! We are looking for off centre vertices ! 😄 Meaning that we'll need at least two lines intersecting.

    Happy hunting !


  • Whoandwhatitis by Whoandwhatitis moderator

    Hello @PattyD,

    No, you will not need to mark the two green lines that are seen coming from the center of the image in most cases. However, sometimes you might see a lot of particles coming from the same approximate location, and these you should definitely mark!

    For the white (or multicolored lines), generally, you might mark lines that appear at extreme angles with "Something Weird", and mark them as an off-center vertex, if they look like they do form a vertex.
    Many of these lines at extreme angles are likely particles that were knocked loose from the detector material.

    With time, you might find that you're better able to discern the origin of some of the lines in 3D space, regardless of which image is presented to you during classification.

    The important part is to enjoy contributing to the project and interacting with others here, and finding the Higgs Hunters objects that just look really neat!

    Now to get a bit technical, the objects are filtered in a way that removes many of the particles that come directly from the center. In general, the exception to this is the green-line pair that you see in many of the images. These are typically created during the decay of a W boson, which sometimes decays to muons (the green lines). This discussion has a lot more detail on this topic: