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Armen Tumasyan

Researcher at Yerevan Physics Institute

Publications -  1330
Citations -  88558

Armen Tumasyan is an academic researcher from Yerevan Physics Institute. The author has contributed to research in topics: Large Hadron Collider & Lepton. The author has an hindex of 128, co-authored 1189 publications receiving 79408 citations. Previous affiliations of Armen Tumasyan include CERN & Austrian Academy of Sciences.

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Search for new physics in top quark production with additional leptons in proton-proton collisions at $\sqrt{s} = $ 13 TeV using effective field theory

Albert M. Sirunyan, +2427 more
- 09 Mar 2021 - 
TL;DR: In this article, the Wilson coefficients (WCs) of the EFT operators are used to model the observed yields of top quarks with additional leptons at the LHC.

Measurements of TT Charge Asymmetry Using Dilepton Final States in PP Collisions at s=8TeV

Vardan Khachatryan, +3 more
TL;DR: In this article, the authors measured the charge asymmetry in tt events using dilepton final states produced in pp collisions at the LHC at √s = 8 TeV.
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Search for exotic decays of a Higgs boson into undetectable particles and one or more photons

Vardan Khachatryan, +2295 more
- 10 Feb 2016 - 
TL;DR: In this paper, a search is presented for exotic decays of a Higgs boson into undetectable particles and one or two isolated photons in pp collisions at a center-of-mass energy of 8 TeV.
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Measurement of differential cross sections and charge ratios for t-channel single top quark production in proton–proton collisions at √s=13Te

Albert M. Sirunyan, +2308 more
- 06 May 2020 - 
TL;DR: The spin asymmetry, sensitive to the top quark polarisation, is determined from the differential distribution of the polarisation angle at parton level to be 0.440 ± 0.070, in agreement with the standard model prediction.
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Constraints on anomalous Higgs boson couplings to vector bosons and fermions in its production and decay using the four-lepton final state

Albert M. Sirunyan, +29 more
- 17 Sep 2021 - 
TL;DR: In this article, the kinematic effects in the Higgs boson's four-lepton decay H $\to$ 4$\ell$ and its production in association with two jets, a vector boson, or top quarks are analyzed, using a full detector simulation and matrix element techniques to identify the production mechanisms.