# CERN Preprints

2020-07-11
08:42
 Search for the lepton flavor violating decay ${\tau \!\to\! 3\mu}$ in proton-proton collisions at $\sqrt{s} =$ 13 TeV Results are reported from a search for the lepton flavor violating decay ${\tau \!\to\! 3\mu}$ in proton-proton collisions at $\sqrt{s} =$ 13 TeV. [...] CERN-EP-2020-113 ; CMS-BPH-17-004-003. - 2020. Additional information for the analysis - CMS AuthorList - Fulltext

2020-07-11
05:10
 Sound speed induced production of primordial black holes / Romano, Antonio Enea (CERN ; ICRA, Pescara) We study different mechanisms by which the speed of primordial curvature perturbations can produce an enhancement of the curvature spectrum, which could lead to the production of primordial black holes (PBH). [...] arXiv:2006.07321. - 5 p. Fulltext

2020-07-11
05:10
 Cryopumping and Vacuum Systems / Baglin, Vincent (CERN) The understanding of complex and/or large vacuum systems operating at cryogenic temperatures requires a specific knowledge of the vacuum science at such temperatures. [...] arXiv:2006.01574. - 34 p. Fulltext

2020-07-11
05:09
 Charge Collection and Electrical Characterization of Neutron Irradiated Silicon Pad Detectors for the CMS High Granularity Calorimeter / Akchurin, N. (Texas Tech.) ; Almeida, P. (CERN) ; Alyari, M. (Fermilab) ; Bergauer, T. (Vienna, OAW) ; Brondolin, E. (CERN) ; Gecse, Z. (Fermilab) ; Kuryatkov, V. (Texas Tech.) ; Lipton, R. (Fermilab) ; Mannelli, M. (CERN) ; Mengke, T. (Texas Tech.) et al. The replacement of the existing endcap calorimeter in the Compact Muon Solenoid (CMS) detector for the high-luminosity LHC (HL-LHC), scheduled for 2027, will be a high granularity calorimeter. [...] arXiv:2005.08051 ; FERMILAB-PUB-20-297-CMS. - 36 p. Fulltext

2020-07-10
11:28
 Search for decays of the 125 GeV Higgs boson into a Z boson and a $\rho$ or $\phi$ meson Decays of the 125 GeV Higgs boson into a Z boson and a $\rho^{0}(770)$ or $\phi(1020)$ meson are searched for using proton-proton collision data collected by the CMS experiment at the LHC at $\sqrt{s} =$ 13 TeV. [...] CERN-EP-2020-120 ; CMS-HIG-19-012-003. - 2020. Additional information for the analysis - CMS AuthorList - Fulltext

2020-07-10
10:20
 What sort of coupling impedances are tolerable in the future CPS ? / Sørenssen, A CERN-MPS-DL-70-1 ; MPS-DL-70-1. - 1970. - 14 p. Full text

2020-07-09
14:01
 First observation of the decay $B^0 \rightarrow D^0 \overline{D}{}^0 K^+ \pi^-$ / LHCb Collaboration The first observation of the decay $B^0 \rightarrow D^0 \overline{D}{}^0 K^+ \pi^-$ is reported using proton-proton collision data corresponding to an integrated luminosity of 4.7 $\mathrm{fb}^{-1}$ collected by the LHCb experiment in 2011, 2012 and 2016. [...] arXiv:2007.04280 ; LHCb-PAPER-2020-015 ; CERN-EP-2020-112 ; LHCB-PAPER-2020-015. - 2020. Fulltext - Related data file(s) - Fulltext

2020-07-09
12:11
 The CMS Tracker Upgrade for the High Luminosity LHC / Paoletti, Simone (INFN, Florence) /CMS Collaboration The LHC machine is planning an upgrade program which will smoothly bring the instantaneous luminosity to about $\mathrm{5 - 7.5 \times 10^{34} cm^{-2}s^{-1}}$ in 2028, to reach an integrated luminosity of $\mathrm{3000 \ fb ^{-1}}$ and possibly up to $\mathrm{4500 \ fb ^{-1}}$ by the end of 2039. This High Luminosity LHC scenario, HL-LHC, will require an upgrade program of the LHC detectors known as Phase-2 upgrade. [...] CMS-CR-2019-253.- Geneva : CERN, 2019 - 8 p. Fulltext: PDF; In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019

2020-07-09
12:11
 Development of an Optical Readout Hybrid for the CMS Outer Tracker Upgrade / Rasevic, Nikola (VINCA Inst. Nucl. Sci., Belgrade) ; Blanchot, Georges (CERN) ; Baron, S ; Kovacs, Mark Istvan (CERN) ; Kulis, S ; Porret, D ; Zografos, Angelos (Natl. Tech. U., Athens) The pixel-strip modules for the CMS Tracker Phase-2 Upgrade for the HL-LHC integrate a readout hybrid (PS-ROH) for the control and data acquisition link. This hybrid is based on the new, low power and compact gigabit transceiver (LpGBT) and the versatile transceiver VTRx+ specifically designed for the upgrade. [...] CMS-CR-2019-222.- Geneva : CERN, 2019 - 6 p. Fulltext: PDF; In : TWEPP 2019 Topical Workshop on Electronics for Particle Physics, Santiago De Compostela, Spain, 2 - 6 Sep 2019

2020-07-09
11:49
 Investigation into the event-activity dependence of $\Upsilon(\text{nS})$ relative production in proton-proton collisions at $\sqrt{s} =$ 7 TeV / CMS Collaboration The ratios of the production cross sections between the excited $\Upsilon\text{(2S)}$ and $\Upsilon\text{(3S)}$ mesons and the $\Upsilon\text{(1S)}$ ground state, detected via their decay into two muons, are studied as a function of the number of charged particles in the event. [...] arXiv:2007.04277 ; CMS-BPH-14-009 ; CERN-EP-2020-075 ; CMS-BPH-14-009-003. - 2020. Additional information for the analysis - CMS AuthorList - Fulltext - Fulltext