Profil bibliographique

N. Almeida

Informations fournies par OpenAlex. Research Africa ne déduit ni nationalité, ni poste, ni coordonnées personnelles.

5Publications signalées
479Citations signalées
1Affiliations récentes

Les institutions déclarées

LIP - Laboratory of Instrumentation and Experimental Particle Physics

Les domaines associés

Particle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research

Les publications récentes

Accès ouvert 2013 article OpenAlex

Measurement of the prompt J/ψ and ψ(2S) polarizations in pp collisions at s=7 TeV

S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan et autres

The polarizations of prompt J /ψ and ψ(2S) mesons are measured in proton-proton collisions at √ s = 7 TeV, using a dimuon data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.9 fb -1 …

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159 citations Physics Letters B
Accès ouvert 2013 article OpenAlex

Study of the underlying event at forward rapidity in pp collisions at $ \sqrt{s}=0.9,2.76,\;\mathrm{and}\;7\;\mathrm{TeV} $

S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan et autres

Abstract The underlying event activity in proton-proton collisions at forward pseudo-rapidity (−6.6 < η < −5.2) is studied with the CMS detector at the LHC, using a novel observable: the ratio of the forward energy density, dE/dη, for events with a charged-particle …

am, at, be (code pays fourni par la source)

110 citations Journal of High Energy Physics
Accès ouvert 2012 article OpenAlex

Search for new physics with long-lived particles decaying to photons and missing energy in pp collisions at $ \sqrt{s}=7 $ TeV

S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan et autres

Abstract A search is performed for long-lived neutral particles decaying into a photon and invisible particles. An example of such a signature is the decay of the lightest neutralino with nonzero lifetime into a gravitino and a photon in gauge-mediated supersymmetry, with …

am, at, by, be (code pays fourni par la source)

17 citations Journal of High Energy Physics
Accès ouvert 2012 article OpenAlex

Search for supersymmetry in hadronic final states using M T2 in pp collisions at $ \sqrt{s}=7 $ TeV

S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan et autres

Abstract A search for supersymmetry or other new physics resulting in similar final states is presented using a data sample of 4.73 fb−1 of pp collisions collected at $ \sqrt{s}=7 $ TeV with the CMS detector at the LHC. Fully hadronic final …

am, at, be (code pays fourni par la source)

134 citations Journal of High Energy Physics
Accès ouvert 2011 article OpenAlex

First measurement of hadronic event shapes in pp collisions at s=7 TeV

V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam et autres

Hadronic event shapes have been measured in proton–proton collisions at s = 7 TeV , with a data sample collected with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 3.2 pb − 1 . Event-shape distributions, …

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59 citations Physics Letters B
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