Dermot Moran

The Compact Muon Solenoid (CMS) experiment prepares its Phase-2 upgrade for the high-luminosity era of the LHC operation (HL-LHC). Due to the increase of occupancy, trigger latency and rates, the full electronics of the CMS Drift Tube (DT) chambers will need to be replaced. In the new design, the time bin for the digitization of the chamber signals will be of around 1 ns, and the totality of the signals will be forwarded asynchronously to the service cavern at full resolution. The new backend system will be in charge of building the trigger primitives of each chamber. These trigger primitives contain the information at chamber level about the muon candidates position, direction, and collision time, and are used as input in the L1 CMS trigger. The added functionalities will improve the robustness of the system against ageing. An algorithm based on analytical solutions for reconstructing the DT trigger primitives, called Analytical Method, has been implemented both as a software C++ emulator and in firmware. Its performance has been estimated using the software emulator with simulated and real data samples, and through hardware implementation tests. Measured efficiencies are 96 to 98% for all qualities and time and spatial resolutions are close to the ultimate performance of the DT chambers. A prototype chain of the HL-LHC electronics using the Analytical Method for trigger primitive generation has been installed during Long Shutdown 2 of the LHC and operated in CMS cosmic data taking campaigns in 2020 and 2021. Results from this validation step, the so-called Slice Test, are presented.

Abstract Latin America and Caribbean (LAC) regions were an important epicenter of the COVID-19 pandemic and SARS-CoV-2 evolution. Through the COVID-19 Genomic Surveillance Regional Network (COVIGEN), LAC countries produced an important number of genomic sequencing data that made possible an enhanced SARS-CoV-2 genomic surveillance capacity in the Americas, paving the way for characterization of emerging variants and helping to guide the public health response. In this study we analyzed approximately 300,000 SARS-CoV-2 sequences generated between February 2020 and March 2022 by multiple genomic surveillance efforts in LAC and reconstructed the diffusion patterns of the main variants of concern (VOCs) and of interest (VOIs) possibly originated in the Region. Our phylogenetic analysis revealed that the spread of variants Gamma, Lambda and Mu reflects human mobility patterns due to variations of international air passenger transportation and gradual lifting of social distance measures previously implemented in countries. Our results highlight the potential of genetic data to reconstruct viral spread and unveil preferential routes of viral migrations that are shaped by human mobility patterns.

With short resumes and highlights the discussions in the different working groups of the workshop MPI@LHC 2012 is documented.

Abstract This chapter explains how Merleau-Ponty reinterprets the tradition of “double sensation” he inherited from Edmund Husserl. While Husserl claims double sensation is characteristic only of touch, Merleau-Ponty develops this notion as applying to all the senses, and indeed the reflexivity of thought itself. The notion of chaism and intertwining in this work points toward Merleau-Ponty’s late work on the flesh (la chair).

With short resumes and highlights the discussions in the different working groups of the workshop MPI@LHC 2012 is documented.

A search for a heavy Higgs boson using several final states in the H → WW and H → ZZ decay channels is reported.The search is based upon proton-proton collision data samples corresponding to an integrated luminosity of up to 5.1 fb -1 at √ s = 7 TeV and up to 19.7 fb -1 at √ s = 8 TeV, recorded by the CMS experiment at the CERN LHC.A Higgs boson with Standard Model-like couplings and decays in the mass range of 145 GeV < m H < 1000 GeV is excluded at 95% confidence level.The results are also interpreted in the context of an electroweak singlet extension of the Standard Model.

We report on an indirect method being used to measure luminosity at LHCb. It involves recording the event rate of elastic diphoton dimuon production. Preliminary MC studies suggest that with 1 fb^{-1} of data this method could provide a luminosity measurement with a precision of better than 2%

Searches for additional Higgs bosons with the CMS detector at the LHC are presented. The analyses are based on proton-proton collisions at \sqrt{s} = 13 TeV recorded in 2016, corresponding to an integrated luminosity of 35.9 fb^{-1}. The observed data are consistent with the standard model expectations. Upper limits on the Higgs boson production cross section times branching ratio are set for each search. These results further reduce the allowed parameter space for extensions of the standard model.

Searches for additional neutral Higgs bosons by the CMS experiment at the LHC are presented. A number of different decay channels and production mechanisms are covered. The analyses are based on proton-proton collisions at $\sqrt{s} =$ 13 TeV recorded in 2016, corresponding to an integrated luminosity of 35.9 $\mathrm{fb^{-1}}$. The observed data are consistent with the standard model expectations. Upper limits on the Higgs boson production cross section times branching ratio are set for each search, typically in the context of a two-Higgs-doublet model formulation. These results further reduce the allowed parameter space for extensions of the standard model.

An abstract is not available for this content so a preview has been provided. Please use the Get access link above for information on how to access this content.