1 / 12

A storm in a “T” cup

A storm in a “T” cup. Or how (not) to make transverse projections at the LHC. Usual geometry and momentum projection. In (1+3)d:.

dard
Télécharger la présentation

A storm in a “T” cup

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A storm in a “T” cup Or how (not) to make transverse projections at the LHC

  2. Usual geometry and momentum projection In (1+3)d: What to do with time-like component of P when projecting to (1+2)d?Various options possible & used to construct time-like component: (Here labelled “T”, “V”, “o”)Differences, pros & cons not widely appreciated.

  3. Option 1/3The “T” projectionMass-preserving

  4. Option 2/3 The “V” projectionSpeed preserving After this projection the 1+2-dimensional inner product is no longer M2 However, the 1+2 dimensional speed is preserved:

  5. Option 3/3 The “o” projectionAlways massless

  6. A graphical representation Hierarchy easily proved to be:

  7. Partitioning events Reconstruct parent masses by summing (1+3) or (1+2) vectors

  8. Operations “add” and “project” do not commute Example:

  9. Procedures given for constructing variables for given hypothesis Example of fully leptonictop pair decay

  10. How existing variables fit in ourcategorisation

  11. What common computer libraries offer

More Related