Peter Robmann

Improving missing transverse momentum estimation with a deep neural network

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, Wolfgang Adam et autres

At hadron colliders, the net transverse momentum of particles that do not interact with the detector (missing transverse momentum, p → T miss ) is a crucial observable in many analyses. In the standard model, p → T miss originates from neutrinos. …

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

Characterizing the initial state and dynamical evolution in XeXe and PbPb collisions using multiparticle cumulants

Aram Hayrapetyan, В. Макаренко, A. Tumasyan, Wolfgang Adam et autres

For the first time, correlations among mixed-order moments of two or three flow harmonics —( v n k , v m l ) and ( v n k , v m l , v p q ), with k, l , and …

Vector boson scattering and anomalous quartic couplings in final states with ℓνqq or ℓℓqq plus jets using proton-proton collisions at $$ \sqrt{s}=13 $$ TeV

A Hayrapetyan, Vladimir Makarenko, A. Tumasyan, W. Adam et autres

A bstract A measurement is presented of the electroweak vector boson scattering production of ZV (V = W, Z) boson pairs associated with two jets in proton-proton collisions at a center-of-mass energy of 13 TeV. The data, corresponding to an integrated luminosity …

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

Search for medium effects using jet axis decorrelation in inclusive jets from PbPb collisions at $\sqrt{s_\text{NN}}$ = 5.02 TeV

V. Chekhovsky, Aram Hayrapetyan, В. Макаренко, A. Tumasyan et autres

The jet axis decorrelation in inclusive jets is studied using lead-lead (PbPb) collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The jet axis decorrelation is defined as the angular difference between two definitions of the jet axis. It is …

de (code pays fourni par la source)

Observation of quantum entanglement in top quark pair production in proton–proton collisions at s=13 TeV

Aram Hayrapetyan, A. Tumasyan, Wolfgang Adam, Janik Walter Andrejkovic et autres

Abstract Entanglement is an intrinsic property of quantum mechanics and is predicted to be exhibited in the particles produced at the Large Hadron Collider. A measurement of the extent of entanglement in top quark-antiquark ( tt¯ ) events produced in proton–proton collisions …

Observation of the J/ψ→μ+μ−μ+μ− decay in proton-proton collisions at s=13 TeV

Aram Hayrapetyan, A. Tumasyan, W. Adam, Janik Walter Andrejkovic et autres

The J/ψ→μ+μ−μ+μ− decay has been observed with a statistical significance in excess of five standard deviations. The analysis is based on an event sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experiment in 2018 and …

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

Overview of high-density QCD studies with the CMS experiment at the LHC

Aram Hayrapetyan, A. Tumasyan, W. Adam, Janik Walter Andrejkovic et autres

The heavy ion (HI) physics program has proven to be an essential part of the overall physics program at the Large Hadron Collider at CERN. Its main purpose has been to provide a detailed characterization of the quark-gluon plasma (QGP), a deconfined …

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

Pseudorapidity distributions of charged hadrons in lead-lead collisions at $\sqrt{s_\mathrm{NN}}$ = 5.36 TeV

Aram Hayrapetyan, A. Tumasyan, W. Adam, Janik Walter Andrejkovic et autres

The pseudorapidity ($\eta$) distributions of charged hadrons are measured using data collected at the highest ever nucleon-nucleon center-of-mass energy of $\sqrt{s_\mathrm{NN}}$ = 5.36 TeV for collisions of lead-lead ions. The data were recorded by the CMS experiment at the LHC in 2022 …

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

Bottom quark energy loss and hadronization with B$^+$ and B$^0_\mathrm{s}$ nuclear modification factors using pp and PbPb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV

A. Tumasyan, W. Adam, Janik Walter Andrejkovic, T. Bergauer et autres

The production cross sections of B$^0_\mathrm{s}$ and B$^+$ mesons are reported in proton-proton (pp) collisions recorded by the CMS experiment at the CERN LHC with a center-of-mass energy of 5.02 TeV. The data sample corresponds to an integrated luminosity of 302 pb$^{-1}$. …

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

Search for the Higgs boson decays to a $\rho^0$, $\phi$, or K$^{*0}$ meson and a photon in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Aram Hayrapetyan, A. Tumasyan, Wolfgang Adam, Janik Walter Andrejkovic et autres

Three rare decay processes of the Higgs boson to a $\rho$(770)$^0$, $\phi$(1020), or K$^{*}$(892)$^0$ meson and a photon are searched for using $\sqrt{s}$ = 13 TeV proton-proton collision data collected by the CMS experiment at the LHC. Events are selected assuming the …

Search for pair-produced vector-like leptons in final states with third-generation leptons and at least three b quark jets in proton-proton collisions at $\sqrt{s}$ = 13 TeV

A. Tumasyan, W. Adam, Janik Walter Andrejkovic, T. Bergauer et autres

The first search is presented for vector-like leptons (VLLs) in the context of the '4321 model', an ultraviolet-complete model with the potential to explain existing B physics measurements that are in tension with standard model predictions. The analyzed data, corresponding to an …

First Search for Exclusive Diphoton Production at High Mass with Tagged Protons in Proton-Proton Collisions at $\sqrt{s}$ =13 TeV

A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic et autres

A search for exclusive two-photon production via photon exchange in proton-proton collisions, pp $\to$ p$\gamma\gamma$p with intact protons, is presented. The data correspond to an integrated luminosity of 9.4 fb$^{-1}$ collected in 2016 using the CMS and TOTEM detectors at a center-of-mass …