11th International Workshop on Boosted Object Phenomenology, Reconstruction and Searches in HEP (BOOST 2019)

Session

Lunch @ MIT and Poster Session

Jul 22, 2019, 12:00 PM

32-123 (MIT)

58. ATLAS Search for Resonance Decaying into Boosted Top Quark Pairs

Sahibjeet Singh (University of Toronto (CA))

Poster

Many Beyond Standard Model theories predict an increased number of boosted top quark events making the ttbar system an important stepping stone in the search for new physics. The ATLAS experiment has just finished its second run December 2018 with a total of 140 fb-1 worth of data collected through 2015-2018, with this luminosity, the run 2 data allows an analysis of a greater number of...

29. Calibration of the Boosted X→bb Tagger in g→bb splitting at the ATLAS Experiment

ATLAS Collaboration

Poster

The physics programme at ATLAS involves a variety of Standard Model and Beyond Standard Model resonances decaying to two b quarks, including the Higgs Boson. In order to overcome the intense QCD backgrounds, probe low mass ranges, or decays of heavy resonances resulting in boosted bb pairs, ATLAS has developed the Boosted X→bb tagger. The double b-tagging efficiency scale-factors between MC...

35. Forward pile-up jet rejection at ATLAS

ATLAS Collaboraton, Anastasia Kotsokechagia (LAL)

Poster

Rejecting jets originating from pile-up vertices in becoming a more important challenge at the LHC as the rates of pile-up increase. In the central region highly efficient rejection can be achieved using track-based variables but in the forward region this is not possible. This poster will cover ways of rejecting forward pile-up jets using the balance between identified central pile-up jets...

34. Object-based missing transverse momentum significance at ATLAS

ATLAS Collaboration

Poster

The calculation of missing transverse momentum (ETmiss) has been and will continue to be vital for physics analyses at the ATLAS experiment. Quantifying the momentum imbalance of the event gives physicists the ability to identify non-interacting standard model particles, such as neutrinos, and to search for signatures indicating the presence of physics beyond the Standard Model. In order to...

38. Poster: The reaction to medium induced radiation of various jet groomers

Lihan Liu (Vanderbilt University (US))

Poster

Jet quenching in heavy ion collisions serves as a way to understand the properties of the hot and dense quark-gluon plasma (QGP). Jets interact with the color charges of the QGP leading to a modification of the jet substructure by measuring which we can know the mechanism of jet quenching.

Due to the presence of a QGP, gluon radiation pattern in the parton shower as compared to the vacuum will...

27. Single and double differential $t\bar{t}$ production cross section measurements in boosted regime

ATLAS Collaboration

Poster

The large energy and luminosity reached by the Large Hadron Collider allow to perform differential
measurements also in regions of the phase space where a massive particle, as the top quark, is
produced with high transverse momentum.
The analysis presented in this contribution is the differential measurement of sigma(ttbar), obtained
considering events collected by the ATLAS experiment in...

10. Studies of granularity of a hadronic calorimeter for tens-of-TeV jets at a 100 TeV pp collider

Mr Chih-Hsiang Yeh (National Central University (TW))

Poster

Jet substructure variables for hadronic jets with transverse momenta in the range from 2.5 TeV to 20 TeV were studied using several designs for the spatial size of calorimeter cells. The studies used the full Geant4 simulation of calorimeter response combined with realistic reconstruction of calorimeter clusters. In most cases, the results indicate that the performance of jet-substructure...