G. G. Da Silveira
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View article: Search for charged-lepton flavour violation in top quark interactions with an up-type quark, a muon, and a τ lepton in proton-proton collisions at $$\sqrt{s}={13}$$ TeV
Search for charged-lepton flavour violation in top quark interactions with an up-type quark, a muon, and a τ lepton in proton-proton collisions at $$\sqrt{s}={13}$$ TeV Open
A bstract A search for charged-lepton flavour violation (CLFV) in top quark (t) production and decay is presented. The search uses proton-proton collision data corresponding to 138 fb − 1 collected with the CMS experiment at $$\sqrt{s}={13…
View article: Search for New Physics in Jet Multiplicity Patterns of Multilepton Events at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> <mml:mtext> </mml:mtext> <mml:mtext> </mml:mtext> <mml:mi>TeV</mml:mi> </mml:math>
Search for New Physics in Jet Multiplicity Patterns of Multilepton Events at Open
A first search for beyond the standard model physics in jet multiplicity patterns of multilepton events is presented, using a data sample corresponding to an integrated luminosity of 138 fb − 1 of 13 TeV proton-proton collisions …
View article: LHC as an Axion-Photon Collider
LHC as an Axion-Photon Collider Open
Assuming the existence of an axionlike particle (ALP), beams of relativistic particles emit fluxes of quasireal ALPs, analogous to the photon fluxes described by Weizsäcker-Williams-type approximations. Consequently, ALP-ALP and ALP-photon…
View article: Elliptic anisotropy measurement of the f0(980) hadron in proton-lead collisions and evidence for its quark-antiquark composition
Elliptic anisotropy measurement of the f0(980) hadron in proton-lead collisions and evidence for its quark-antiquark composition Open
Despite the f 0 (980) hadron having been discovered half a century ago, the question about its quark content has not been settled: it might be an ordinary quark-antiquark ( $${{\rm{q}}}\overline{{{\rm{q}}}}$$ ) meson, a tetraquark ( …
View article: Search for flavor-changing neutral current interactions of the top quark mediated by a Higgs boson in proton-proton collisions at 13 TeV
Search for flavor-changing neutral current interactions of the top quark mediated by a Higgs boson in proton-proton collisions at 13 TeV Open
A search for flavor-changing neutral current interactions of the top quark (t) and the Higgs boson (H) is presented. The search is based on proton-proton collision data collected in 2016–2018 at a center-of-mass energy of 13 TeV with the C…
View article: Brazilian Report on Dark Matter 2024
Brazilian Report on Dark Matter 2024 Open
One of the key scientific objectives for the next decade is to uncover the nature of dark matter (DM). We should continue prioritizing targets such as weakly-interacting massive particles (WIMPs), Axions, and other low-mass dark matter can…
View article: Measurement of the inclusive cross sections for W and Z boson production in proton-proton collisions at $$ \sqrt{\textrm{s}} $$ = 5.02 and 13 TeV
Measurement of the inclusive cross sections for W and Z boson production in proton-proton collisions at $$ \sqrt{\textrm{s}} $$ = 5.02 and 13 TeV Open
A bstract Measurements of fiducial and total inclusive cross sections for W and Z boson production are presented in proton-proton collisions at $$ \sqrt{s} $$ = 5.02 and 13 TeV. Electron and muon decay modes ( ℓ = e or μ ) are studied i…
View article: Measurement of the inclusive WZ production cross section in pp collisions at $$ \sqrt{\textrm{s}} $$ = 13.6 TeV
Measurement of the inclusive WZ production cross section in pp collisions at $$ \sqrt{\textrm{s}} $$ = 13.6 TeV Open
A bstract The inclusive WZ production cross section is measured in proton-proton collisions at a centre-of-mass energy of 13.6 TeV, using data collected during 2022 with the CMS detector, corresponding to an integrated luminosity of 34 . 7…
View article: Proton reconstruction with the TOTEM Roman pot detectors for high-<i>β</i>* LHC data
Proton reconstruction with the TOTEM Roman pot detectors for high-<i>β</i>* LHC data Open
The TOTEM Roman pot detectors are used to reconstruct the transverse momentum of scattered protons and to estimate the transverse location of the primary interaction. This paper presents new methods of track reconstruction, measurements of…
View article: Search for high-mass resonances in a final state comprising a gluon and two hadronically decaying W bosons in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV
Search for high-mass resonances in a final state comprising a gluon and two hadronically decaying W bosons in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV Open
A bstract A search for high-mass resonances decaying into a gluon, g, and two W bosons is presented. A Kaluza-Klein gluon, g KK , decaying in cascade via a scalar radion R, g KK → gR → gWW, is considered. The final state studied consists o…
View article: Search for New Resonances Decaying to Pairs of Merged Diphotons in Proton-Proton Collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>13</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:mrow></mml:math>
Search for New Resonances Decaying to Pairs of Merged Diphotons in Proton-Proton Collisions at Open
A search is presented for an extended Higgs sector with two new particles, X and ϕ, in the process X→ϕϕ→(γγ)(γγ). Novel neural networks classify events with diphotons that are merged and determine the diphoton masses. The search uses LHC p…
View article: Search for charged-lepton flavor violation in the production and decay of top quarks using trilepton final states in proton-proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>13</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:math>
Search for charged-lepton flavor violation in the production and decay of top quarks using trilepton final states in proton-proton collisions at Open
A search is performed for charged-lepton flavor violating processes in top quark (t) production and decay. The data were collected by the CMS experiment from proton-proton collisions at a center-of-mass energy of 13 TeV and correspond to a…
View article: Measurement of the $W$ boson decay branching fraction ratio $\\mathcal{B}(W \\to cq)/\\mathcal{B}(W \\to\\mathrm{q\\bar{q}&#x27;})$ in proton-proton collisions at $\\sqrt{s}$ = 13 TeV
Measurement of the $W$ boson decay branching fraction ratio $\\mathcal{B}(W \\to cq)/\\mathcal{B}(W \\to\\mathrm{q\\bar{q}'})$ in proton-proton collisions at $\\sqrt{s}$ = 13 TeV Open
The most precise measurement to date of the W boson hadronic decay branching fraction ratio $R_\\mathrm{c}^\\mathrm{W}$ = $\\mathcal{B}$(W $\\to$ cq)/$\\mathcal{B}$(W $\\to$$\\mathrm{q\\bar{q}'}$) is presented. The measurement is based on …
View article: Evidence for $CP$ violation and measurement of $CP$-violating parameters in B$^0_\\mathrm{s}$ $\\to$ J/$\\psi\\,\\phi$(1020) decays in pp collisions at $\\sqrt{s} =$ 13 TeV
Evidence for $CP$ violation and measurement of $CP$-violating parameters in B$^0_\\mathrm{s}$ $\\to$ J/$\\psi\\,\\phi$(1020) decays in pp collisions at $\\sqrt{s} =$ 13 TeV Open
A pioneering machine-learning-based flavor-tagging algorithm combining same-side and opposite-side tagging is used to obtain the equivalent of 27$\\,$000 tagged B$^0_\\mathrm{s}$$\\to$ J/$\\psi\\, \\phi$(1020) decays from pp collisions at …
View article: Search for a Neutral Gauge Boson with Nonuniversal Fermion Couplings in Vector Boson Fusion Processes in Proton-Proton Collisions at $\sqrt{s}=13$ TeV
Search for a Neutral Gauge Boson with Nonuniversal Fermion Couplings in Vector Boson Fusion Processes in Proton-Proton Collisions at $\sqrt{s}=13$ TeV Open
The first search for a heavy neutral spin-1 gauge boson (𝑍′) with nonuniversal fermion couplings produced via vector boson fusion processes and decaying to tau leptons or 𝑊 bosons is presented. The analysis is performed using LHC data at $…
View article: Search for new physics in jet scaling patterns of multilepton events at $\sqrt{s}$ = 13 TeV
Search for new physics in jet scaling patterns of multilepton events at $\sqrt{s}$ = 13 TeV Open
A first search for beyond the standard model physics in jet scaling patterns of multilepton events is presented, using a data sample corresponding to an integrated luminosity of 138 fb$^{-1}$ of 13 TeV proton-proton collisions recorded by …
View article: Search for heavy neutral resonances decaying to tau lepton pairs in proton-proton collisions at $\\sqrt{s}$ = 13 TeV
Search for heavy neutral resonances decaying to tau lepton pairs in proton-proton collisions at $\\sqrt{s}$ = 13 TeV Open
A search for heavy neutral gauge bosons (Z') decaying into a pair of tau leptons is performed in proton-proton collisions at $\\sqrt{s}$ = 13 TeV at the CERN LHC. The data were collected with the CMS detector and correspond to an integrate…
View article: Search for heavy neutral Higgs bosons A and H in the $\\mathrm{t\\bar{t}}$Z channel in proton-proton collisions at 13 TeV
Search for heavy neutral Higgs bosons A and H in the $\\mathrm{t\\bar{t}}$Z channel in proton-proton collisions at 13 TeV Open
A direct search for new heavy neutral Higgs bosons A and H in the $\\mathrm{t\\bar{t}}$Z channel is presented, targeting the process pp $\\to$ A $\\to$ ZH with H $\\to$$\\mathrm{t\\bar{t}}$. For the first time, the channel with decays of t…
View article: Angular analysis of the B$^0$$\\to$ K$^*$(892)$^0\\mu^+\\mu^-$ decay in proton-proton collisions at $\\sqrt{s}$ = 13 TeV
Angular analysis of the B$^0$$\\to$ K$^*$(892)$^0\\mu^+\\mu^-$ decay in proton-proton collisions at $\\sqrt{s}$ = 13 TeV Open
A full set of optimized observables is measured in an angular analysis of the decay B$^0$$\\to$ K$^*$(892)$^0\\mu^+\\mu^-$ using a sample of proton-proton collisions at $\\sqrt{s}$ = 13 TeV, collected with the CMS detector at the LHC, corr…
View article: Update of the Brazilian Participation in the Next-Generation Collider Experiments
Update of the Brazilian Participation in the Next-Generation Collider Experiments Open
This proposal outlines the future plans of the Brazilian High-Energy Physics (HEP) community for upcoming collider experiments. With the construction of new particle colliders on the horizon and the ongoing operation of the High-Luminosity…
View article: Search for bottom-type vectorlike quark pair production in dileptonic and fully hadronic final states in proton-proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>13</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:math>
Search for bottom-type vectorlike quark pair production in dileptonic and fully hadronic final states in proton-proton collisions at Open
A search is described for the production of a pair of bottom-type vectorlike quarks (B VLQs) with mass greater than 1000 GeV. Each B VLQ decays into a b quark and a Higgs boson, a b quark and a Z boson, or a t quark and a W boson. This ana…