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View article: Nuclear modification of $\Upsilon$ states in pPb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV
Nuclear modification of $\Upsilon$ states in pPb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV Open
Production cross sections of $\Upsilon$(1S), $\Upsilon$(2S), and $\Upsilon$(3S) states decaying into \muplusmuminus in proton-lead (pPb) collisions are reported using data collected by the CMS experiment at$\sqrt{s_\mathrm{NN}}$ = 5.02 TeV…
View article: Evidence for X(3872) in PbPb collisions and studies of its prompt production at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV
Evidence for X(3872) in PbPb collisions and studies of its prompt production at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV Open
The first evidence for X(3872) production in relativistic heavy ion collisions is reported. The X(3872) production is studied in lead-lead (PbPb) collisions at a center-of-mass energy of $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV per nucleon pair, …
View article: The CMS Phase-1 pixel detector upgrade
The CMS Phase-1 pixel detector upgrade Open
The CMS detector at the CERN LHC features a silicon pixel detector as its innermost subdetector. The original CMS pixel detector has been replaced with an upgraded pixel system (CMS Phase-1 pixel detector) in the extended year-end technica…
View article: Evidence for X(3872) in PbPb collisions and studies of its prompt production at $\sqrt{s_\mathrm{NN}}=$ 5.02 TeV
Evidence for X(3872) in PbPb collisions and studies of its prompt production at $\sqrt{s_\mathrm{NN}}=$ 5.02 TeV Open
The first evidence for X(3872) production in relativistic heavy ion collisions is reported. The X(3872) production is studied in lead-lead (PbPb) collisions at a center-of-mass energy of $\sqrt{s_\mathrm{NN}}=$ 5.02 TeV per nucleon pair, u…
View article: Search for resonant di-Higgs production at CMS
Search for resonant di-Higgs production at CMS Open
The latest results from searches for resonant production of Higgs boson pairs (HH) at the Large Hadron Collider (LHC) with the CMS detector are presented. The searches explore a variety of final states, some of which both in the resolved a…
View article: Evidence for Top Quark Production in Nucleus-Nucleus Collisions
Evidence for Top Quark Production in Nucleus-Nucleus Collisions Open
Ultrarelativistic heavy ion collisions recreate in the laboratory the thermodynamical conditions prevailing in the early universe up to 10$^{-6}$ sec, thereby allowing the study of the quark-gluon plasma (QGP), a state of quantum chromodyn…
View article: A Deep Neural Network for Simultaneous Estimation of b Jet Energy and Resolution
A Deep Neural Network for Simultaneous Estimation of b Jet Energy and Resolution Open
We describe a method to obtain point and dispersion estimates for the energies of jets arising from b quarks produced in proton–proton collisions at an energy of $$\sqrt{s}=13\,\text {TeV} $$ at the CERN LHC. The algorithm is trained on a…
View article: Performance of the CMS Level-1 trigger in proton-proton collisions at √<i>s</i> = 13 TeV
Performance of the CMS Level-1 trigger in proton-proton collisions at √<i>s</i> = 13 TeV Open
At the start of Run 2 in 2015, the LHC delivered proton-proton collisions at a center-of-mass energy of 13 TeV. During Run~2 (years 2015--2018) the LHC eventually reached a luminosity of 2.1 $\times$ 10$^{34}$ cm$^{-2}$ s$^{-1}$, almost th…
View article: Search for 2HDM neutral Higgs bosons through the process H $\rightarrow$ ZA $\rightarrow l^+l^-b\overline{b}$ with the CMS detector
Search for 2HDM neutral Higgs bosons through the process H $\rightarrow$ ZA $\rightarrow l^+l^-b\overline{b}$ with the CMS detector Open
The inability of the standard model (SM) to explain some observed phenomena motivates theoretical models featuring an extension of the SM scalar sector that predict additional Higgs bosons. The Two-Higgs-doublet model (2HDM) is one of thes…
View article: Measurements with silicon photomultipliers of dose-rate effects in the radiation damage of plastic scintillator tiles in the CMS hadron endcap calorimeter
Measurements with silicon photomultipliers of dose-rate effects in the radiation damage of plastic scintillator tiles in the CMS hadron endcap calorimeter Open
Measurements are presented of the reduction of signal output due to radiation damage for two types of plastic scintillator tiles used in the hadron endcap (HE) calorimeter of the CMS detector. The tiles were exposed to particles produced i…
View article: Determination of the strong coupling constant αS(mZ) from measurements of inclusive W± and Z boson production cross sections in proton-proton collisions at $$ \sqrt{\mathrm{s}} $$ = 7 and 8 TeV
Determination of the strong coupling constant αS(mZ) from measurements of inclusive W± and Z boson production cross sections in proton-proton collisions at $$ \sqrt{\mathrm{s}} $$ = 7 and 8 TeV Open
A bstract Twelve measurements of inclusive cross sections of W ± and Z boson production, performed in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, are compared with perturbative quantum chromodynamics calculations at…
View article: A deep neural network to search for new long-lived particles decaying to jets
A deep neural network to search for new long-lived particles decaying to jets Open
A tagging algorithm to identify jets that are significantly displaced from the proton-proton (pp) collision region in the CMS detector at the LHC is presented. Displaced jets can arise from the decays of long-lived particles (LLPs), which …
View article: Experimental study of different silicon sensor options for the upgrade of the CMS Outer Tracker
Experimental study of different silicon sensor options for the upgrade of the CMS Outer Tracker Open
During the high-luminosity phase of the LHC (HL-LHC), planned to start in 2027, the accelerator is expected to deliver an instantaneous peak luminosity of up to 7.5×10$^{34}$ cm$^{-2}$ s$^{-1}$. A total integrated luminosity of 0300 or eve…
View article: Search for physics beyond the standard model in multilepton final states in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV
Search for physics beyond the standard model in multilepton final states in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV Open
A bstract A search for physics beyond the standard model in events with at least three charged leptons (electrons or muons) is presented. The data sample corresponds to an integrated luminosity of 137 fb − 1 of proton-proton collisions at …
View article: Performance of the reconstruction and identification of high-momentum muons in proton-proton collisions at √<i>s</i> = 13 TeV
Performance of the reconstruction and identification of high-momentum muons in proton-proton collisions at √<i>s</i> = 13 TeV Open
The CMS detector at the LHC has recorded events from proton-proton collisions, with muon momenta reaching up to 1.8 TeV in the collected dimuon samples. These high-momentum muons allow direct access to new regimes in physics beyond the sta…