Vivan Nguyen

Northeastern University

296 Papers

245 Citations

Vivan Nguyen is an academic researcher from Northeastern University. The author has contributed to research in topics: Large Hadron Collider & Higgs boson. The author has an hindex of 16, co-authored 102 publications. Previous affiliations of Vivan Nguyen include University of Trento.

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Papers

•Journal Article•10.1103/PHYSREVLETT.126.252002

Measurement of the Wγ Production Cross Section in Proton-Proton Collisions at s=13 TeV and Constraints on Effective Field Theory Coefficients

Albert M. Sirunyan, +2307 more

- 25 Jun 2021

- Physical Review Letters

TL;DR: In this article, a fiducial cross section for W$\gamma$ production in proton-proton collisions is measured at a center-of-mass energy of 13 TeV in 137 fb$^{-1}$ of data collected using the CMS detector at the LHC.

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Journal Article•10.1088/1748-0221/19/02/p02031

Muon identification using multivariate techniques in the CMS experiment in proton-proton collisions at sqrt(s) = 13 TeV

A. Hayrapetyan, +2276 more

- 05 Oct 2023

- Journal of Instrumentation

TL;DR: Identification of muons using multivariate techniques in CMS experiment at 13 TeV is highly efficient for muons with transverse momentum greater than 10 GeV.

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Journal Article•10.1007/jhep04(2021)109

Measurement of differential cross sections for Z bosons produced in association with charm jets in pp collisions at s\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setl

Albert M. Sirunyan, +2236 more

- 01 Apr 2021

- Journal of High Energy Physics

Journal Article•10.1140/epjc/s10052-024-13729-y

Search for pair production of heavy particles decaying to a top quark and a gluon in the lepton+jets final state in proton–proton collisions at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs}

A. Hayrapetyan, +2328 more

- 27 Oct 2024

Abstract: A search is presented for the pair production of new heavy resonances, each decaying into a top quark (t) or antiquark and a gluon (g). The analysis uses data recorded with the CMS detector from proton–proton collisions at a center-of-mass energy of 13TeV\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,\text {Te}\hspace{-.08em}\text {V}$$\end{document} at the LHC, corresponding to an integrated luminosity of 138fb-1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,\text {fb}^{-1}$$\end{document}. Events with one muon or electron, multiple jets, and missing transverse momentum are selected. After using a deep neural network to enrich the data sample with signal-like events, distributions in the scalar sum of the transverse momenta of all reconstructed objects are analyzed in the search for a signal. No significant deviations from the standard model prediction are found. Upper limits at 95% confidence level are set on the product of cross section and branching fraction squared for the pair production of excited top quarks in the t∗→tg\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text {t}^{*} \rightarrow {\text {t}} {\text {g}} $$\end{document} decay channel. The upper limits range from 120 to 0.8fb\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,\text {fb}$$\end{document} for a t∗\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text {t}^{*} $$\end{document}with spin-1/2 and from 15 to 1.0fb\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,\text {fb}$$\end{document} for a t∗\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text {t}^{*} $$\end{document}with spin-3/2. These correspond to mass exclusion limits up to 1050 and 1700GeV\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,\text {Ge}\hspace{-.08em}\text {V}$$\end{document} for spin-1/2 and spin-3/2 t∗\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text {t}^{*} $$\end{document}particles, respectively. These are the most stringent limits to date on the existence of t∗→tg\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text {t}^{*} \rightarrow {\text {t}} {\text {g}} $$\end{document} resonances.

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Journal Article•10.1140/epjc/s10052-023-11632-6

Measurements of the Higgs boson production cross section and couplings in the W boson pair decay channel in proton-proton collisions at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepac

Armen Tumasyan, +2377 more

- 01 Jul 2023

TL;DR: Measurements of Higgs boson production cross sections and couplings in proton-proton collisions at 13 TeV are reported, with results compatible with the standard model, using 138 fb^-1 of CMS data, and a signal strength modifier μ = 0.95 ± 0.10.

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