Accès ouvert
2025
article
OpenAlex
Vladimir Chekhovsky, Aram Hayrapetyan, M. Dragicevic, E. M. Da Costa et autres
A search is performed for dark matter (DM) produced in association with a single top quark or a pair of top quarks using the data collected with the CMS detector at the LHC from proton-proton collisions at a center-of-mass energy of 13 …
am, at, be, fr, br
(code pays fourni par la source)
Accès ouvert
2025
preprint
OpenAlex
Vladimir Chekhovsky, Aram Hayrapetyan, В. Макаренко, A. Tumasyan et autres
The first observation of coherent ϕ(1020) meson photoproduction off heavy nuclei is presented using ultraperipheral lead-lead collisions at a center-of-mass energy per nucleon pair of 5.36 TeV. The data were collected by the CMS experiment and correspond to an integrated luminosity of …
am, at, be, fr, de, br
(code pays fourni par la source)
Accès ouvert
2024
preprint
OpenAlex
Aram Hayrapetyan, A. Tumasyan, W. Adam, Janik Walter Andrejkovic et autres
A measurement of the ratio of branching fractions $R$(J/$\psi$) = $\mathcal{B}$(B$^+_\text{c}$$\to$ J/$\psi$$\tau^+\nu_\tau$)/$\mathcal{B}$(B$^+_\text{c}$$\to$ J/$\psi$$\mu^+\nu_\mu$) in the J/$\psi$$\to$$\mu^+\mu^-$, $\tau^+$$\to$$\mu^+\mu_\tau\overline{\nu}_\tau$ decay channel is presented. This measurement uses a sample of proton-proton collision data collected at a center-of-mass energy of 13 TeV by the CMS experiment …
am, at, be, fr, de, br
(code pays fourni par la source)