Accès ouvert
2020
article
OpenAlex
A. M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi et autres
The polarizations of promptly produced ${\ensuremath{\chi}}_{c1}$ and ${\ensuremath{\chi}}_{c2}$ mesons are studied using data collected by the CMS experiment at the LHC, in proton-proton collisions at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$. The ${\ensuremath{\chi}}_{c}$ states are reconstructed via their radiative decays ${\ensuremath{\chi}}_{c}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\gamma}$, with the photons being …
am, at, be, br
(code pays fourni par la source)
Accès ouvert
2018
article
OpenAlex
A. M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi et autres
boson and one parton in the final state. The fourth combines the fully differential next-to-next-to-leading order calculation of the process with no parton in the final state with next-to-next-to-leading logarithm resummation and parton showering.
am, at, be
(code pays fourni par la source)
Accès ouvert
2018
article
OpenAlex
A. M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi et autres
Abstract A search for resonances in the mass range 12–70 GeV produced in association with a b quark jet and a second jet, and decaying to a muon pair, is reported. The analysis is based on data from proton-proton collisions at center-of-mass …
am, at, be
(code pays fourni par la source)
Accès ouvert
2018
article
OpenAlex
A. M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi et autres
A search for narrow resonances decaying to bottom quark-antiquark pairs is presented, using a data sample of proton-proton collisions at sqrt[s]=8 TeV corresponding to an integrated luminosity of 19.7 fb^{-1}. The search is extended to masses lower than those reached in typical …
am, at, be
(code pays fourni par la source)
Accès ouvert
2018
article
OpenAlex
A. M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi et autres
A study of the associated production of a Z boson and a charm quark jet (Z + c), and a comparison to production with a b quark jet (Z + b), in pp collisions at a centre-of-mass energy of 8 TeV are …
am, at, be
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
A. M. Sirunyan, W. Adam, F. Ambrogi, E. Asilar et autres
The first observation of top quark production in proton-nucleus collisions is reported using proton-lead data collected by the CMS experiment at the CERN LHC at a nucleon-nucleon center-of-mass energy of sqrt[s_{NN}]=8.16 TeV. The measurement is performed using events with exactly one isolated …
am, at, be
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
A. M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar et autres
Jet charge is an estimator of the electric charge of a quark, antiquark, or gluon initiating a jet. It is based on the momentum-weighted sum of the electric charges of the jet constituents. Measurements of three charge observables of the leading jet …
am, at, be
(code pays fourni par la source)
Accès ouvert
2015
article
OpenAlex
V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam et autres
The per-event yield of the highest transverse momentum charged particle and charged-particle jet, integrated above a given ${p}_{\mathrm{T}}^{\mathrm{min}}$ threshold starting at ${p}_{\mathrm{T}}^{\mathrm{min}}=0.8$ and 1 GeV, respectively, is studied in $pp$ collisions at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$. The particles and the jets are measured …
am, at, be
(code pays fourni par la source)
Accès ouvert
2015
article
OpenAlex
V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam et autres
Measurements of the five most significant angular coefficients, A 0 through A 4 , for Z bosons produced in pp collisions at s = 8 TeV and decaying to μ + μ − are presented as a function of the transverse momentum …
am, at, be
(code pays fourni par la source)
Accès ouvert
2013
article
OpenAlex
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)
Accès ouvert
2011
article
OpenAlex
S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan et autres
A measurement of W-gamma and Z-gamma production in proton-proton collisions at sqrt(s) = 7 TeV is presented. Results are based on a data sample recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 36 inverse picobarns. The …
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(code pays fourni par la source)