Accès ouvert
2025
preprint
OpenAlex
V. Chekhovsky, A. Hayrapetyan, В. Макаренко, A. Tumasyan et autres
Bound states of charm and anticharm quarks, known as charmonia, have a rich spectroscopic structure that can be used to probe the dynamics of hadron production in high-energy hadron collisions. Here, the cross section ratio of excited ($\psi$(2S)) and ground state (J/$\psi$) …
am, at, be, br
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Accès ouvert
2024
article
OpenAlex
Aram Hayrapetyan, A. Tumasyan, W. Adam, Janik Walter Andrejkovic et autres
Data availability: Release and preservation of data used by the CMS Collaboration as the basis for publications is guided by the CMS data preservation, re-use and open access policy (https://cms-docdb.cern.ch/cgi-bin/PublicDocDB/RetrieveFile?docid=6032%26filename=CMSDataPolicyV1.2.pdf%26version=2).
am, at, be, fr, br
(code pays fourni par la source)
Accès ouvert
2024
preprint
OpenAlex
CMS Collaboration, Aram Hayrapetyan, A. Tumasyan, W. Adam et autres
Ultrarelativistic nuclear collisions create a strongly interacting state of hot and dense quark–gluon matter that exhibits a remarkable collective flow behavior with minimal viscous dissipation. To gain deeper insights into its intrinsic nature and fundamental degrees of freedom, we determine the speed …
am, us, no, at, be, fr, br
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Accès ouvert
2024
preprint
OpenAlex
Aram Hayrapetyan, A. Tumasyan, W. Adam, Janik Walter Andrejkovic et autres
A search is presented for an extended Higgs sector with two new particles, X and $\phi$, in the process X $\to$$\phi\phi$$\to$$(\gamma\gamma)(\gamma\gamma)$. Novel neural networks classify events with diphotons that are merged and determine the diphoton masses. The search uses LHC proton-proton collision …
am, at, be, fr, br
(code pays fourni par la source)
Accès ouvert
2024
preprint
OpenAlex
CMS Collaboration, Aram Hayrapetyan, A. Tumasyan, W. Adam et autres
The results of a search for a standard model-like Higgs boson decaying into two photons in the mass range between 70 and 110 GeV are presented. The analysis uses the data set collected by the CMS experiment in proton-proton collisions at $\sqrt{s}$ …
am, at, be, fr, br
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Accès ouvert
2024
preprint
OpenAlex
CMS Collaboration, Aram Hayrapetyan, A Tumasyan, Wolfgang Adam et autres
An analysis of the production of a Higgs boson (H) in association with a top quark-antiquark pair ($\mathrm{t\bar{t}}$H) or a single top quark (tH) is presented. The Higgs boson decay into a bottom quark-antiquark pair (H $\to$$\mathrm{b\bar{b}}$) is targeted, and three different …
am, at, be, fr, br
(code pays fourni par la source)
Accès ouvert
2024
preprint
OpenAlex
CMS Collaboration, A Hayrapetyan, A. Tumasyan, W. Adam et autres
Measurements of light-by-light scattering (LbL, $\gamma\gamma\to\gamma\gamma$) and the Breit--Wheeler process (BW, $\gamma\gamma$$\to$$\mathrm{e^+e^-}$) are reported in ultraperipheral PbPb collisions at a centre-of-mass energy per nucleon pair of 5.02 TeV. The data sample, corresponding to an integrated luminosity of 1.7 nb$^{-1}$, was collected by …
am, at, be, fr, br
(code pays fourni par la source)