Exclusive Top Quark Pair Production Analysis at LHC
Interested in dileptonic decaying channels of top quark to b-jet + W boson, focusing on exclusive production. Explore photon-photon interactions, PPS detectors, and kinematic analysis with Monte Carlo samples. Highlight differences between inclusive and exclusive analyses.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
You are allowed to download the files provided on this website for personal or commercial use, subject to the condition that they are used lawfully. All files are the property of their respective owners.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.
E N D
Presentation Transcript
Search for exclusive top quark pair production at the LHC Summer Internship Supervisors: Beatriz Ribeiro Lopes Dr. Michele Gallinaro Miguel Nobre Guerreiro
Brief Introduction [1] [1] We are interested in the dileptonic decaying channel Top quark -> b-jet + W boson [1] https://www-d0.fnal.gov/Run2Physics/top/top_public_web_pages/top_feynman_diagrams.html
Exclusive ? ? Dileptonic decaying channel Photon-photon interaction Missing transverse energy (met) due to neutrinos Protons preserved and detected by the PPS (allow the kinematic reconstruction even with met)
PPS Detector (Proton Precision Spectometer) LHC magnets bend scattered protons outside of the beam envelope Roman Pots placed a few mm from the beamline Detect protons at about 200 m of the IP (positive and negative sides)
Central Selection Require for leptons: Require for jets: 2 1 |?| 2.5 1 b-jet pT 13 GeV
Main Background Inclusive ? ? Drell-Yan
Kinematic Analysis Monte Carlo samples from 2017 Inclusive ? ? Drell-Yan Exclusive ? ? Tools for multivariable analysis on real data ?=13 TeV
Further Goals Better highlight the differences between inclusive and exclusive ? ? PPS-RP: (ll) Vs (pp)
ForwardTracksIN PPS From each track we get the momentum loss of the proton Reconstruct tracks on both sides (?1and ?2) We can reconstruct the mass and rapidity of the system ???= ??1?2 ? =?? ?? ???=1 ?1 ?2 ?? 2ln for every possible combination 1 per track in the RP ? = 0 check which mass and rapidity values are compatible with what we are looking for! y =
