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Measurement of top quark pair production in association with a Z boson in proton-proton collisions at <mml:msqrt>s</mml:msqrt>=13 TeV

CMS Collaboration (SPRINGER, 2020)

A measurement of the inclusive cross section of top quark pair production in association with a Z boson using proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC is performed. The data sample corresponds ...

Search for Supersymmetry with a Compressed Mass Spectrum in Events with a Soft τ Lepton, a Highly Energetic Jet, and Large Missing Transverse Momentum in Proton-Proton Collisions at √s=13 TeV

CMS Collaboration (AMER PHYSICAL SOC, 2020)

The first search for supersymmetry in events with an experimental signature of one soft, hadronically decaying tau lepton, one energetic jet from initial-state radiation, and large transverse momentum imbalance is presented. ...

Measurement of the Y(1S) pair production cross section and search for resonances decaying to Y(1S)μ+μ- in proton-proton collisions at √s=13 TeV

CMS Collaboration (ELSEVIER, 2020)

The fiducial cross section for Y(1S) pair production in proton-proton collisions at a center-of-mass energy of 13TeVin the region where both Y(1S) mesons have an absolute rapidity below 2.0 is measured to be 79 +/- 11 ...

Performance of the CMS Level-1 trigger in proton-proton collisions at √s=13 TeV

CMS Collaboration (IOP Publishing Ltd, 2020)

At the start of Run 2 in 2015, the LHC delivered proton-proton collisions at a center-ofmass energy of 13 TeV. During Run 2 (years 2015-2018) the LHC eventually reached a luminosity of 2.1 x 10(34) cm(-2) s(-1), almost ...

Evidence for Top Quark Production in Nucleus-Nucleus Collisions

CMS Collaboration (AMER PHYSICAL SOC, 2020)

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 ...

Measurement of the cross section for electroweak production of a Z boson, a photon and two jets in proton-proton collisions at √s=13TeV and constraints on anomalous quartic couplings

CMS Collaboration (SPRINGER, 2020)

A measurement is presented of the cross section for electroweak production of a Z boson and a photon in association with two jets (Z gamma jj) in proton-proton collisions. The Z boson candidates are selected through their ...

Search for supersymmetry in pp collisions at √s=13 TeV with 137 fb-1 in final states with a single lepton using the sum of masses of large-radius jets

CMS Collaboration (AMER PHYSICAL SOC, 2020)

Results are reported from a search for new physics beyond the standard model in proton-proton collisions in final states with a single lepton; multiple jets, including at least one jet tagged as originating from the ...

Search for heavy Higgs bosons decaying to a top quark pair in proton-proton collisions at √s=13 TeV

CMS Collaboration (SPRINGER, 2020)

A search is presented for additional scalar (H) or pseudoscalar (A) Higgs bosons decaying to a top quark pair in proton-proton collisions at a center-of-mass energy of 13 TeV. The data set analyzed corresponds to an ...

Observation of the Bs0 → X(3872)φ Decay

CMS Collaboration (AMER PHYSICAL SOC, 2020)

Using a data sample of proton-proton collisions at root s = 13 TeV, corresponding to an integrated luminosity of 140 fb(-1) collected by the CMS experiment in 2016-2018, the B-s(0) -> X(3872)phi decay is observed. Decays ...

Measurement of the associated production of a Z boson with charm or bottom quark jets in proton-proton collisions at √s=13 TeV

CMS Collaboration (AMER PHYSICAL SOC, 2020)

Ratios of cross sections, sigma(Z + c jets)/sigma(Z + jets), sigma(Z + b jets)/sigma(Z + jets), and sigma(Z + c jets)/sigma(Z + b jets) in the associated production of a Z boson with at least one charm or bottom quark jet ...

Search for a charged Higgs boson decaying into top and bottom quarks in events with electrons or muons in proton-proton collisions at √s=13TeV

CMS Collaboration (SPRINGER, 2020)

A search is presented for a charged Higgs boson heavier than the top quark, produced in association with a top quark, or with a top and a bottom quark, and decaying into a top-bottom quark-antiquark pair. The search is ...

The production of isolated photons in PbPb and pp collisions at √sNN=5.02 TeV

CMS Collaboration (SPRINGER, 2020)

The transverse energy (ET gamma) spectra of photons isolated from other particles are measured using proton-proton (pp) and lead-lead (PbPb) collisions at the LHC at root s(NN) = 5.02 TeV with integrated luminosities of ...

Multiparticle correlation studies in pPb collisions √sNN=8.16 TeV

CMS Collaboration (AMER PHYSICAL SOC, 2020)

The second- and third-order azimuthal anisotropy Fourier harmonics of charged particles produced in pPb collisions, at root s(NN) = 8.16 TeV, are studied over a wide range of event multiplicities. Multiparticle correlations ...

Constraints on the χc1 versus χc2 Polarizations in Proton-Proton Collisions at √s=8 TeV

CMS Collaboration (AMER PHYSICAL SOC, 2020)

The polarizations of promptly produced chi(c1) and chi(c2) mesons are studied using data collected by the CMS experiment at the LHC, in proton-proton collisions at root s = 8 TeV. The chi(c) states are reconstructed via ...

Search for dijet resonances using events with three jets in proton-proton collisions at √s=13 TeV

CMS Collaboration (ELSEVIER, 2020)

A search for a narrow resonance with a mass between 350 and 700 GeV, and decaying into a pair of jets, is performed using proton-proton collision events containing at least three jets. The data sample corresponds to an ...

Search for a heavy pseudoscalar Higgs boson decaying into a 125 GeV Higgs boson and a Z boson in final states with two tau and two light leptons at √s=13 TeV

CMS Collaboration (SPRINGER, 2020)

A search is performed for a pseudoscalar Higgs boson, A, decaying into a 125 GeV Higgs boson h and a Z boson. The h boson is specifically targeted in its decay into a pair of tau leptons, while the Z boson decays into a ...

Search for an excited lepton that decays via a contact interaction to a lepton and two jets in proton-proton collisions at √s=13 TeV

CMS Collaboration (SPRINGER, 2020)

Results are presented from a search for events containing an excited lepton (electron or muon) produced in association with an ordinary lepton of the same flavor and decaying to a lepton and two hadronic jets. Both the ...

Search for a light pseudoscalar Higgs boson in the boosted μμττ final state in proton-proton collisions at √s=13 TeV

CMS Collaboration (SPRINGER, 2020)

A search for a light pseudoscalar Higgs boson (a) decaying from the 125 GeV (or a heavier) scalar Higgs boson (H) is performed using the 2016 LHC proton-proton collision data at root s = 13 TeV, corresponding to an integrated ...

Extraction and validation of a new set of CMS pythia8 tunes from underlying-event measurements

CMS Collaboration (SPRINGER, 2020)

New sets of CMS underlying-event parameters ("tunes") are presented for the pythia8 event generator. These tunes use the NNPDF3.1 parton distribution functions (PDFs) at leading (LO), next-to-leading (NLO), or next-to-ne ...

Study of J/ψ meson production inside jets in pp collisions at N √s=8 TeV The CM Collaboration

CMS Collaboration (ELSEVIER, 2020)

A study of the production of prompt J/psi mesons contained in jets in proton-proton collisions at root s = 8 TeV is presented. The analysis is based on data corresponding to an integrated luminosity of 19.1 fb(-1) collected ...

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