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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.

Papers
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ϒ(nS) polarizations versus particle multiplicity in pp collisions at s=7 TeV

Vardan Khachatryan, +2309 more
- 10 Oct 2016 - 
TL;DR: In this paper, the polarizations of the Y(1S), Y(2S), and Y(3S) mesons are measured as a function of the charged particle multiplicity in proton-proton collisions at sqrt(s) = 7 TeV.
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Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at s√ = 8 TeV

Georges Aad, +5214 more
- 01 Aug 2020 - 
TL;DR: The combination of measurements of the W boson polarization in top quark decays performed by the ATLAS and CMS collaborations is presented in this paper, where the measurements are based on proton-proton collision data.

Exclusive and semi-exclusive pi+pi- production in proton-proton collisions at sqrt(s) = 7 TeV

Vardan Khachatryan, +2254 more
TL;DR: In this paper, a measurement of the exclusive and semi-exclusive production of charged pion pairs in proton-proton collisions is presented, where the pi+pi-pair is emitted at central rapidities, and scattered protons stay intact (p) or diffractively dissociate (p*) without detection.
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Constraints on the $\chi_\mathrm{c1}$ versus $\chi_\mathrm{c2}$ polarizations in proton-proton collisions at $\sqrt{s} =$ 8 TeV

Albert M. Sirunyan, +2306 more
- 01 Jan 2020 - 
TL;DR: In this article, the polarizations of the mesons produced by the LHC at s = 8'TeV were measured in the helicity frame, through the analysis of the χc2 to χ c1 yield ratio as a function of the polar or azimuthal angle of the positive muon emitted in the J/ψ→μ+μ- decay, in three bins of J /ψ transverse momentum.
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Search for W Boson Decays to Three Charged Pions

Albert M. Sirunyan, +2276 more
- 18 Apr 2019 - 
TL;DR: Proton-proton collision data recorded by the CMS experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 77.3 fb^{-1], have been analyzed and no significant excess is observed above the background expectation.