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SOCRATES: a radiation-tolerant SoC generator framework
No full textAs front-end ASIC complexity in HEP experiments grows, there is a shift towards more modular, programmable, and cost-effective designs. This work introduces the SOCRATES platform, a radiation-tolerant SoC generator toolset, based on SoCMake, a hardware/software build system that automates SoC assembly and verification. Utilizing existing IP blocks, SoCMake generates the SoC hardware and the software framework to run application code. The platform includes radiation-tolerant IPs and fault-tolerant extensions supporting redundancy and error correction. A prototype ASIC based on the RISC-V Ibex processor, generated using SOCRATES in a 28nm CMOS process, will validate the toolset through SEE and TID testing
The Critical Importance of Software for HEP
No full textParticle physics has an ambitious and broad global experimental programme for the coming decades. Large investments in building new facilities are already underway or under consideration. Scaling the present processing power and data storage needs by the foreseen increase in data rates in the next decade for HL-LHC is not sustainable within the current budgets. As a result, a more efficient usage of computing resources is required in order to realise the physics potential of future experiments. Software and computing are an integral part of experimental design, trigger and data acquisition, simulation, reconstruction, and analysis, as well as related theoretical predictions. A significant investment in computing and software is therefore critical. Advances in software and computing, including artificial intelligence (AI) and machine learning (ML), will be key for solving these challenges. Making better use of new processing hardware such as graphical processing units (GPUs) or ARM chips is a growing trend. This forms part of a computing solution that makes efficient use of facilities and contributes to the reduction of the environmental footprint of HEP computing. The HEP community already provided a roadmap for software and computing for the last EPPSU, and this paper updates that, with a focus on the most resource critical parts of our data processing chain
Search for compressed electroweakinos with low-momentum isolated tracks
No full textA search is presented for higgsino dark matter (DM) in final states with a low momentum (soft), isolated track and large missing transverse momentum.
In the minimal supersymmetric standard model (MSSM), charginos are most often produced in association with a nearly mass-degenerate neutralino or another chargino, and predominantly decay into the lightest neutralino (DM candidate) and a soft pion. For a mass difference less than , a discernible displacement of the pion's track with respect to the primary vertex can arise, reaching up to about for the smallest allowed . A parameterized multivariate classifier is employed to distinguish the signal track from background tracks, optimally targeting a range of by exploiting the track transverse momentum, impact parameter, and event topology to varying degrees depending on the assumed . The analyzed data correspond to an integrated luminosity of collected by the CMS experiment in proton-proton collisions at . No evidence of new physics is observed, and limits are set at the confidence level in the mass plane of the model. Assuming MSSM cross sections, values of between and are excluded for a mass chargino, and chargino masses up to are excluded for of
CMS Token Transition
No full textWithin the LHC community, a momentous transition has been occurring in authorization. For nearly 20 years, services within the Worldwide LHC Computing Grid (WLCG) have authorized based on mapping an identity, derived from an X.509 credential, or a group/role, derived from a VOMS extension issued by the experiment. A fundamental shift is occurring to capabilities: the credential, a bearer token, asserts the authorizations of the bearer, not the identity. By the HL-LHC era, the CMS experiment plans for the transition to tokens, based on the WLCG Common JSON Web Token profile, to be complete. Services in the technology architecture include the INDIGO Identity and Access Management server to issue tokens; a HashiCorp Vault server to store and refresh access tokens for users and jobs; a managed token bastion server to push credentials to the HTCondor CredMon service; and HTCondor to maintain valid tokens in long-running batch jobs. We will describe the transition plans of the experiment, current status, configuration of the central authorization server, lessons learned in commissioning token-based access with sites, and operational experience using tokens for both job submissions and file transfers
Estimates of Particles on Target for Future Ion Experiments in the SPS North Area
No full textThe CERN Super Proton Synchrotron (SPS) delivers ion beams to the North Area typically over a period of four weeks per year. Currently, NA61/SHINE is the only fixed target ion experiment in Experimental Hall North Area 1 (EHN1), continuing until Long Shutdown 3 (LS3). A study is being conducted by the Physics Beyond Colliders (PBC) study group, in collaboration with the Future Ions Working Group, to investigate future experiments using different ion species at various energies. As an input to these studies, the estimates on the Ions on Target (IoT) and Protons on Target (PoT) delivery and the expected accelerator performance are presented in this note, taking into account beam intensity performance, beam time sharing, radiation and power consumption in the SPS and North Area magnets and other known constraints
LHCb Recent studies of open charm production in small systems at LHCb
No full textThe forward geometry and precision instrumentation of the LHCb spec- trometer provides unique insights into the production of heavy quarks at the LHC. Heavy quark production in pPb collisions are sensitive to the modification of nuclear parton distribution functions, energy loss in the nucleus, and the hadronization process, among other effects. In this talk, precision measurements of open charm production from a rich set of charmed hadrons in pPb collisions at 5.02 and 8.16 TeV will be presented, including new LHCb measurements of D mesons and Ξc baryons in pp and pPb collisions. Comparisons with theoretical models and related results will be discussed