A Search for Boosted Low Mass Resonances Decaying to the bb̅ Final State and Produced in Association with a Jet at √s = 13 TeV with the ATLAS Detector

A search in the high momentum regime for new resonances, produced in association with a jet, decaying into a pair of bottom quarks is presented using an integrated luminosity of 80.5 fb-1 of proton-proton collisions at center-of-mass energy √s = 13 TeV recorded by the ATLAS detector at the Large Hadron Collider. The search was performed for low mass resonances, including the Standard Model Higgs boson and leptophobic Z\u27 dark matter mediators, in the mass range of 100 GeV to 200 GeV. For the Standard Model Higgs boson, the observed signal strength is μH = 5.8 ± 3.1 (stat.) ± 1.9 (syst.) ± 1.7 (th.), which is consistent with the background-only hypothesis at 1.6 standard deviations. No evidence of a significant excess of events beyond the expected background is found and competitive limits on leptophobic Z\u27 boson axial-vector couplings to Standard Model quarks with democratic couplings to all quark generations are set for the mass range considered. The dominant background in this analysis is irreducible multijet events from QCD interactions, which I modeled using a parametric function that was robust to fitting bias and spurious signals

Measurement of the cross-section and charge asymmetry of WW bosons produced in proton-proton collisions at s=8\sqrt{s}=8 TeV with the ATLAS detector

This paper presents measurements of the $W^+ \rightarrow \mu^+\nu$ and $W^- \rightarrow \mu^-\nu$ cross-sections and the associated charge asymmetry as a function of the absolute pseudorapidity of the decay muon. The data were collected in proton--proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS experiment at the LHC and correspond to a total integrated luminosity of 20.2~\mbox{fb^{-1}}. The precision of the cross-section measurements varies between 0.8% to 1.5% as a function of the pseudorapidity, excluding the 1.9% uncertainty on the integrated luminosity. The charge asymmetry is measured with an uncertainty between 0.002 and 0.003. The results are compared with predictions based on next-to-next-to-leading-order calculations with various parton distribution functions and have the sensitivity to discriminate between them.Comment: 38 pages in total, author list starting page 22, 5 figures, 4 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-13

Impulse

Features:[Page 2] EROS and SDSU join hands in international research[Page 3] New aerospace project begins at SDSU[Page 4] Energy Watch - Energy awareness committee\u27s goal[Page 5] Chamber gets message to alumni[Page 5] New Agricultural Extension Network installed at SDSU[Page 6] EED: Light up your future[Page 7] Entrepreneur Award[Page 8] John Kappenman - Alumnus leads effort to deploy \u27watchdog\u27 satellite[Page 8] Russ Christiansen - A caring approach to management, engineeringCollege of Engineering Research and Outreach: 1-16 Center SectionDepartments:Students:[Page 25] Pi Tau Sigma elects officers, welcomes members[Page 25] Erickson and Lauritzen lead JEC[Page 26] Ernie\u27s Pontiac Firebird carries memories of friendshipAlumni:[Page 27] SDSU alumni become power industry executivesBenefactors and Donors:[Page 28] Benefactors[Page 29] Benefactors, dean\u27s club, corporate donors, altruistic alumni and friends[Page 30-33] Altruistic alumni and friendshttps://openprairie.sdstate.edu/coe_impulse/1037/thumbnail.jp

MA

thesisquantifier phrases that she describes in later research, and I explain how they combine with verbs. I then show how full copies of quantifier phrases and verbs can occupy different positions in the syntactic tree and that they can be interpreted in the semantic interface without requiring traces in order to resolve type mismatches. Last, I confirm that my proposal does not cause problems for scope interpretation. Using works of Fox, Takahashi, McCarthy, and Aoun and Li, I develop a model that allows the syntax to delete copies of moves quantifier phrases from interpretation and allows the semantic interface to interpret the remaining quantifier phrases for scope relation, and I formalize a quantifier phrases that she describes in later research, and I explain how they combine with verbs. I then show how full copies of quantifier phrases and verbs can occupy different positions in the syntactic tree and that they can be interpreted in the semantic interface without requiring traces in order to resolve type mismatches. Last, I confirm that my proposal does not cause problems for scope interpretation. Using works of Fox, Takahashi, McCarthy, and Aoun and Li, I develop a model that allows the syntax to delete copies of moves quantifier phrases from interpretation and allows the semantic interface to interpret the remaining quantifier phrases for scope relation, and I formalize a rule for that model.

Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at √ s = 8 TeV with the ATLAS detector

Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb−1 of √ s = 8 TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with pT > 120 GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between Emiss T > 150 GeV and Emiss T > 700 GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with either large extra spatial dimensions, pair production of weakly interacting dark matter candidates, or production of very light gravitinos in a gauge-mediated supersymmetric model. In addition, limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presente

Search for direct stau production in events with two hadronic tau-leptons in root s=13 TeV pp collisions with the ATLAS detector

A search for the direct production of the supersymmetric partners ofτ-leptons (staus) in final stateswith two hadronically decayingτ-leptons is presented. The analysis uses a dataset of pp collisions corresponding to an integrated luminosity of139fb−1, recorded with the ATLAS detector at the LargeHadron Collider at a center-of-mass energy of 13 TeV. No significant deviation from the expected StandardModel background is observed. Limits are derived in scenarios of direct production of stau pairs with eachstau decaying into the stable lightest neutralino and oneτ-lepton in simplified models where the two staumass eigenstates are degenerate. Stau masses from 120 GeV to 390 GeV are excluded at 95% confidencelevel for a massless lightest neutralino

Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in √s=13 TeV pp collisions with the ATLAS detector

A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell W and Z bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of √s=13  TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139  fb−1. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015–2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full data set are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at the 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV

Bayesian Methodologies with pyhf

bayesian_pyhf is a Python package that allows for the parallel Bayesian and frequentist evaluation of multi-channel binned statistical models. The Python library pyhf is used to build such models according to the HistFactory framework and already includes many frequentist inference methodologies. The pyhf-built models are then used as data-generating model for Bayesian inference and evaluated with the Python library PyMC. Based on Monte Carlo Chain Methods, PyMC allows for Bayesian modelling and together with the arviz library offers a wide range of Bayesian analysis tools.Comment: 8 pages, 3 figures, 1 listing. Contribution to the Proceedings of the 26th International Conference on Computing In High Energy and Nuclear Physics (CHEP 2023