24-26 October 2018
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Young Physicists' Lightning Round Session 4


Location: Fermilab
Address: Pine St and Kirk Rd Batavia, Illinois
Room: IARC
Date: 26 Oct 09:30 - 5:45 PM

Timetable | Contribution List

Displaying 12 contributions out of 12
The ATLAS experiment is conducting a search for high mass resonant and non-resonant features in dilepton (ee, mumu) spectra using the full Run-2 dataset. Models with new contact interactions (CI) and large extra dimensions (ADD) can manifest themselves as a slight enhancement in the high mass tail of the spectrum. The challenge is to develop a background model that can constrain the shape of the t ... More
Presented by Aaron WHITE on 26/10/2018 at 15:00
Higgs production in association with top quarks (ttH) is predicted by the Standard Model at a rate of about 1% of the total Higgs cross section. This process directly probes the Higgs-top coupling, a critical parameter for isolating Beyond the Standard Model contributions to Higgs physics. The ATLAS search for ttH events in conjunction with the decay H → γγ takes advantage of the high photon d ... More
Presented by Jennet DICKINSON on 26/10/2018 at 14:40
Two recent searches for new physics from the CMS experiment are shown. The first of which is a search for direct production of the tau slepton production in pp collisions at a center-of-mass energy of 13 TeV. The analysed data correspond to an integrated luminosity of 35.9 fb−1 collected with the CMS detector in 2016 and 41.3 fb−1 collected in 2017. The search is performed using events wit ... More
Presented by Mr. Owen COLEGROVE on 26/10/2018 at 14:30
The possibility that dark matter particles may interact via unknown forces, felt only feebly by Standard Model particles, has motivated substantial effort to search for dark-sector forces, the dark photon being a promising candidate. Its motivation, LHCb search results, and current limits will be presented.
Presented by Constantin WEISSER, Mr. Constantin WEISSER on 26/10/2018 at 14:50
The production of deuterons in high-energy collisions is particularly sensitive to the space and time evolution of the system, as well as the baryon production and transport mechanisms. Recent ALICE measurements of spectra and anisotropic flow of (anti-)deuterons provide insight into the production mechanisms of particles in heavy-ion collisions thanks to a critical comparison with the available t ... More
Presented by Brennan SCHAEFER on 26/10/2018 at 15:20
Exotic decays of the Standard Model (SM) Higgs boson provide a unique window for the discovery of new physics, as the Higgs may couple to hidden-sector states that do not interact under the SM gauge transformations. Models predicting exotic Higgs decays to additional light bosons appear in many extensions to the SM and can explain several unknowns in physics, such as the nature of dark matter and ... More
Presented by Christopher HAYES on 26/10/2018 at 15:10
Inspired by developments from the Tau Combined Performance group, the Tau Trigger group recently introduced a Recurrent Neural Network architecture to identify HLT tau leptons in place of our previous Boosted Decision Tree architecture. In this talk, I'll summarize the implementation and performance of this new RNN tau identification scheme within the HLT.
Presented by Mariel PETTEE on 26/10/2018 at 21:55
We present a model-independent search for beyond-standard-model heavy resonances decaying into a W boson and a photon. Possible models include charged Higgs, W', and supersymmetric mesons in folded-SUSY. The lepton channel is used as it has lower background and higher sensitivity to still uninvestigated resonance mass ranges. We aim to set cross-section limits through detailed data analysis of CMS ... More
Presented by Kak WONG on 26/10/2018 at 22:05
A search for a heavy resonance decaying into a top quark and antiquark pair is performed using proton-proton collisions at 13 TeV. The search uses the dataset collected with the CMS detector in 2016, which corresponds to an integrated luminosity of 35.9 1/fb. The analysis is split into three exclusive final states and uses reconstruction techniques that are optimized for top quarks with high Loren ... More
Presented by Ms. Bahareh ROOZBAHANI on 26/10/2018 at 22:15
The LHC will be upgraded to the High Luminosity (HL-LHC) in the late 2020 to further increase the discovery potential of the machine. During the HL-LHC the instantaneous luminosity will be as high as 7x10^34 cm^−2s^−1 in order to collect 10x more proton-proton collision data than at the LHC. The HL-LHC upgrade will set unprecedented challenges from the point of view of both detector and electr ... More
Presented by Fabio RAVERA on 26/10/2018 at 22:25
The LHCb detector will operate with 40 MHz readout and full-software trigger at higher luminosity, after Phase-1 upgrade. The Upstream Tracker (UT) is a critical part of the upgrade that will increase the data rate and trigger efficiency. In this talk, I will describe the purpose and design of UT, with an emphasis on its off-detector electronics.
Presented by Mr. Zishuo YANG on 26/10/2018 at 21:45
The HistFactory p.d.f. template [CERN-OPEN-2012-016] is per-se independent of its implementation in ROOT and it is useful to be able to run statistical analysis outside of the ROOT, RooFit, RooStats framework. pyhf is a pure-python implementation of that statistical model for multi-bin histogram-based analysis and its interval estimation is based on the asymptotic formulas of "Asymptotic formulae ... More
Presented by Matthew FEICKERT on 26/10/2018 at 22:35
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