Measurements of two- and multi-particle angular correlations in pp collisions at View the MathML source are presented as a function of charged-particle multiplicity. The data, corresponding to integrated luminosities of View the MathML source (5 TeV), View the MathML source (7 TeV), and View the MathML source (13 TeV), were collected using the CMS detector at the LHC. The second-order (v2) and third-order (v3) azimuthal anisotropy harmonics of unidentified charged particles, as well as v2 of View the MathML source and View the MathML source particles, are extracted from long-range two-particle correlations as functions of particle multiplicity and transverse momentum. For high-multiplicity pp events, a mass ordering is observed for the v2 values of charged hadrons (mostly pions), View the MathML source, and View the MathML source, with lighter particle species exhibiting a stronger azimuthal anisotropy signal below View the MathML source. For 13 TeV data, the v2 signals are also extracted from four- and six-particle correlations for the first time in pp collisions, with comparable magnitude to those from two-particle correlations. These observations are similar to those seen in pPb and PbPb collisions, and support the interpretation of a collective origin for the observed long-range correlations in high-multiplicity pp collisions.BMWFW and FWF; FNRS and FWO; CNPq, CAPES, FAPERJ, and FAPESP; MES; CERN; CAS, MOST, and NSFC; COLCIENCIAS; MSES and CSF; RPF; SENESCYT; MoER, ERC IUT and ERDF; Academy of Finland, MEC, and HIP; CEA and CNRS/IN2P3; BMBF, DFG, and HGF; GSRT; OTKA and NIH; DAE and DST; IPM; SFI; INFN; MSIP and NRF; LAS; MOE and UM; BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI; MBIE; PAEC; MSHE and NSC; FCT; JINR; MON, RosAtom, RAS and RFBR; MESTD; SEIDI and CPAN; Swiss Funding Agencies; MST; ThEPCenter, IPST, STAR and NSTDA; TUBITAK and TAEK; NASU and SFFR; STFC; DOE and NSF; the Marie-Curie program and the European Research Council and EPLANET; the Leventis Foundation; the Alfred P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture; the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Council of Science and Industrial Research, India; the HOMING PLUS program of the Foundation for Polish Science, cofinanced from European Union, Regional Development Fund, the Mobility Plus program of the Ministry of Science and Higher Education, the OPUS program contract 2014/13/B/ST2/02543 and contract Sonata-bis DEC-2012/07/E/ST2/01406 of the National Science Center; the Thalis and Aristeia programs cofinanced by EU-ESF and the Greek NSRF; the National Priorities Research Program by Qatar National Research Fund; the Programa Clarín-COFUND del Principado de Asturias; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project; and the Welch Foundation

The observation of the standard model (SM) Higgs boson decay to a pair of bottom quarks is presented. The main contribution to this result is from processes in which Higgs bosons are produced in association with a $W$ or $Z$ boson ($VH$), and are searched for in final states including 0, 1, or 2 charged leptons and two identified bottom quark jets. The results from the measurement of these processes in a data sample recorded by the CMS experiment in 2017, comprising $41.3{\mathrm{fb}}^{-1}$ of proton-proton collisions at $\sqrt{s}=13\mathrm{TeV}$, are described. When combined with previous $VH$ measurements using data collected at $\sqrt{s}=7$, 8, and 13 TeV, an excess of events is observed at $m_H=125\mathrm{GeV}$ with a significance of 4.8 standard deviations, where the expectation for the SM Higgs boson is 4.9. The corresponding measured signal strength is $1.01\pm 0.22$. The combination of this result with searches by the CMS experiment for $H\to b\overline{b}$ in other production processes yields an observed (expected) significance of 5.6 (5.5) standard deviations and a signal strength of $1.04\pm 0.20$.

The observation of Higgs boson production in association with a top quark-antiquark pair is reported, based on a combined analysis of proton-proton collision data at center-of-mass energies of $\sqrt{s}=7$, 8, and 13 TeV, corresponding to integrated luminosities of up to 5.1, 19.7, and $35.9{\mathrm{fb}}^{-1}$, respectively. The data were collected with the CMS detector at the CERN LHC. The results of statistically independent searches for Higgs bosons produced in conjunction with a top quark-antiquark pair and decaying to pairs of $W$ bosons, $Z$ bosons, photons, $\tau$ leptons, or bottom quark jets are combined to maximize sensitivity. An excess of events is observed, with a significance of 5.2 standard deviations, over the expectation from the background-only hypothesis. The corresponding expected significance from the standard model for a Higgs boson mass of 125.09 GeV is 4.2 standard deviations. The combined best fit signal strength normalized to the standard model prediction is ${1.26}_{-0.26}^{+0.31}$.

A measurement of the inelastic proton-proton cross section with the CMS detector at a center-of-mass energy of $$ \sqrt{s}=13 $$s=13 TeV is presented. The analysis is based on events with energy deposits in the forward calorimeters, which cover pseudorapidities of −6.6< η <−3.0 and +3.0< η <+5.2. An inelastic cross section of 68.6 ± 0.5(syst) ± 1.6(lumi) mb is obtained for events withM_X>4.1 GeV and/orM_Y>13 GeV, whereM_XandM_Yare the masses of the diffractive dissociation systems at negative and positive pseudorapidities, respectively. The results are compared with those from other experiments as well as to predictions from high-energy hadron-hadron interaction models.

Properties of the Higgs boson are measured in the H → ZZ → 4ℓ (ℓ = e,μ) decay channel. A data sample of proton-proton collisions at $$ \sqrt{s}=13 $$s=13 TeV, collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 35.9 fb⁻¹is used. The signal strength modifierμ, defined as the ratio of the observed Higgs boson rate in the H → ZZ → 4ℓ decay channel to the standard model expectation, is measured to beμ = 1.05_− 0.17^+ 0.19atm_H= 125.09 GeV, the combined ATLAS and CMS measurement of the Higgs boson mass. The signal strength modifiers for the individual Higgs boson production modes are also measured. The cross section in the fiducial phase space defined by the requirements on lepton kinematics and event topology is measured to be 2. 92_− 0.44^+ 0.48(stat)_− 0.24^+ 0.28(syst)fb, which is compatible with the standard model prediction of 2.76 ± 0.14 fb. Differential cross sections are reported as a function of the transverse momentum of the Higgs boson, the number of associated jets, and the transverse momentum of the leading associated jet. The Higgs boson mass is measured to bem_H= 125.26 ± 0.21 GeV and the width is constrained using the on-shell invariant mass distribution to be Γ_H< 1.10 GeV, at 95% confidence level.