# Reports

 2018-04-2614:44 [PUBDB-2018-01861] Report/Journal Article et al Measurement of the $\Lambda_b$ polarization and angular parameters in $\Lambda_b\to J/\psi\, \Lambda$ decays from pp collisions at $\sqrt{s}=$ 7 and 8 TeV [CMS-BPH-15-002; CERN-EP-2017-331; arXiv:1802.04867] Physical review / D D97(7), 072010 (2018) [10.1103/PhysRevD.97.072010]   An analysis of the bottom baryon decay Λb→J/ψ(→μ+μ-)Λ(→pπ-) is performed to measure the Λb polarization and three angular parameters in data from pp collisions at s=7 and 8 TeV, collected by the CMS experiment at the Large Hadron Collider. The Λb polarization is measured to be 0.00±0.06(stat)±0.06(syst) and the parity-violating asymmetry parameter is determined to be 0.14±0.14(stat)±0.10(syst). [...] Restricted: PDF PDF (PDFA); 2018-04-2614:38 [PUBDB-2018-01859] Report/Journal Article et al Comparing transverse momentum balance of b jet pairs in pp and PbPb collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV [CMS-HIN-16-005; CERN-EP-2018-005; arXiv:1802.00707] Journal of high energy physics 1803(3), 181 (2018) [10.1007/JHEP03(2018)181]   The transverse momentum balance of pairs of back-to-back b quark jets in PbPb and pp collisions recorded with the CMS detector at the LHC is reported. The center-of-mass energy in both collision systems is 5.02 TeV per nucleon pair. [...] Restricted: PDF PDF (PDFA); 2018-04-2514:26 [PUBDB-2018-01852] Report/Contribution to a conference proceedings/Contribution to a book Froehlich, L. Machine Protection [CERN-2018-001-SP] CAS-CERN Accelerator School on Free Electron Lasers and Energy Recovery Linacs, Meeting locationHamburg, Germany, 31 May 2016 - 10 Jun 2016 CERN, 613-629 (2018) [10.23730/CYRSP-2018-001.613]   Conventional linacs used for modern free-electron lasers carry electron beams of unprecedented brightness with average powers ranging from a few watts to hundreds of kilowatts. Energy recovery linacs are already operated as radiation sources with nominal electron beam powers beyond 1 MW, and this figure can only be expected to increase in the future. [...] Restricted: PDF PDF (PDFA); 2018-04-2414:56 [PUBDB-2018-01846] Report/Journal Article et al Measurement of associated Z + charm production in proton-proton collisions at $\sqrt{s} =$ 8 TeV [CMS-SMP-15-009; CERN-EP-2017-257; arXiv:1711.02143]   A study of the associated production of a $\mathrm{Z}$ boson and a charm quark jet ( $\mathrm{Z} + \mathrm{c}$ ), and a comparison to production with a $\mathrm{b}$ quark jet ( $\mathrm{Z} + \mathrm{b}$ ), in $\mathrm {p}\mathrm {p}$ collisions at a centre-of-mass energy of 8 $\,\text {TeV}$ are presented. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 $\,\text {fb}^{-1}$ , collected with the CMS detector at the CERN LHC. [...] OpenAccess: PDF PDF (PDFA); 2018-04-2414:50 [PUBDB-2018-01845] Report/Journal Article et al Measurement of the inclusive $\mathrm{t}\overline{\mathrm{t}}$ cross section in pp collisions at $\sqrt{s}=5.02$ TeV using final states with at least one charged lepton [TOP-16-023; CERN-EP-2017-258; arXiv:1711.03143] Journal of high energy physics 1803(03), 115 (2018) [10.1007/JHEP03(2018)115]   The top quark pair production cross section $\left({\sigma}_{\mathrm{t}\overline{\mathrm{t}}}\right)$ is measured for the first time in pp collisions at a center-of-mass energy of 5.02 TeV. The data were collected by the CMS experiment at the LHC and correspond to an integrated luminosity of 27.4 pb$^{−1}$. [...] OpenAccess: PDF PDF (PDFA); 2018-04-2414:31 [PUBDB-2018-01843] Preprint/Report et al Search for ZZ resonances in the 2$\ell$2$\nu$ final state in proton-proton collisions at 13 TeV [CMS-B2G-16-023; CERN-EP-2017-279; arXiv:1711.04370] Journal of high energy physics 1803(03), 003 (2018) [10.1007/JHEP03(2018)003]   A search for heavy resonances decaying to a pair of Z bosons is performed using data collected with the CMS detector at the LHC. Events are selected by requiring two oppositely charged leptons (electrons or muons), consistent with the decay of a Z boson, and large missing transverse momentum, which is interpreted as arising from the decay of a second Z boson to two neutrinos. [...] OpenAccess: PDF PDF (PDFA); 2018-04-2414:26 [PUBDB-2018-01842] Report/Journal Article et al Search for excited states of light and heavy flavor quarks in the $\gamma$+jet final state in proton-proton collisions at $\sqrt{s} =$ 13 TeV [CMS-EXO-17-002; CERN-EP-2017-271; arXiv:1711.04652] Physics letters / B 781, 390 - 411 (2018) [10.1016/j.physletb.2018.04.007]   A search is presented for excited quarks of light and heavy flavor that decay to $\gamma$+jet final states. The analysis is based on data corresponding to an integrated luminosity of 35.9 fb$^{-1}$ collected by the CMS experiment in proton-proton collisions at $\sqrt{s}=$ 13 TeV at the LHC. [...] OpenAccess: PDF PDF (PDFA); 2018-04-2414:13 [PUBDB-2018-01841] Report/Journal Article et al Search for gauge-mediated supersymmetry in events with at least one photon and missing transverse momentum in pp collisions at $\sqrt{s} =$ 13 TeV [CMS-SUS-16-046; CERN-EP-2017-284; arXiv:1711.08008] Physics letters / B 780, 118 - 143 (2018) [10.1016/j.physletb.2018.02.045]   A search for gauge-mediated supersymmetry (SUSY) in final states with photons and large missing transverse momentum is presented. The data sample of pp collisions at s=13TeV was collected with the CMS detector at the CERN LHC and corresponds to an integrated luminosity of 35.9 fb$^{−1}$ . [...] OpenAccess: PDF PDF (PDFA); 2018-04-2414:07 [PUBDB-2018-01840] Report/Journal Article et al Search for new long-lived particles at $\sqrt{s} =$ 13 TeV [CMS-EXO-16-003; CERN-EP-2017-264; arXiv:1711.09120] Physics letters / B 780, 432 - 454 (2018) [10.1016/j.physletb.2018.03.019]   A search for long-lived particles was performed with data corresponding to an integrated luminosity of 2.6 fb$^{−1}$ collected at a center-of-mass energy of 13 TeV by the CMS experiment in 2015. The analysis exploits two customized topological trigger algorithms, and uses the multiplicity of displaced jets to search for the presence of a signal decay occurring at distances between 1 and 1000 mm. [...] OpenAccess: PDF PDF (PDFA); 2018-04-2413:58 [PUBDB-2018-01837] Report/Journal Article et al Measurements of the $\mathrm {p}\mathrm {p}\rightarrow \mathrm{Z}\mathrm{Z}$ production cross section and the $\mathrm{Z}\rightarrow 4\ell$ branching fraction, and constraints on anomalous triple gauge couplings at $\sqrt{s} = 13\,\text {TeV}$ [CMS-SMP-16-017; CERN-EP-2017-219; arXiv:1709.08601]   Four-lepton production in proton-proton collisions, $\mathrm {p}\mathrm {p}\rightarrow (\mathrm{Z}/ \gamma ^*)(\mathrm{Z}/\gamma ^*) \rightarrow 4\ell$ , where $\ell = \mathrm {e}$ or $\mu$ , is studied at a center-of-mass energy of 13 $\,\text {TeV}$ with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 35.9 $\,\text {fb}^{-1}$ . [...] OpenAccess: PDF PDF (PDFA);