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New DAQ server room at CMS P5 for Hi-Lumi
No full textPhotographs taken on 25th July 2025 of the new DAQ room located on the ground floor at P5. This room has been constructed inside the original CMS control room after the new control room was moved to a purpose built building. This new DAQ room is currently being populated to allow the original DAQ room on the first floor to be refurbished ahead of the High Luminosity phase of the LHC, which will see a huge increase of data throughput. Currently, this is at 2 terabits, and this will increase to 50. The new rooms will both use state of the art water cooling systems, allowing racks to be completely populated by servers, and will utilise "free cooling" for a more efficient system. The room will have an overall maximum cooling capacity of 2 MW, resulting in a power density of 13.5 kW/m2, and expected to have a PUE of ~1.1 to 1.2
Rapid-cycling ReBCO dipole magnet concept for muon acceleration
No full textWe present a concept of the rapid-cycling 1.7 T ReBCO magnet for 1 to 10 kT/s ramping range as required for muon acceleration in a future muon collider presently under study. This approach is based on the 6 kA CORC-like cable constructed with 12 superconducting ReBCO tapes of 2 mm width. Based on theoretical prediction there is a linear scaling of the ReBCO cable hysteresis loss with the crossing magnetic field possibly generating power loss independent of the magnetic field ramping speed. This feature makes this ReBCO cable suitable for the construction of rapid-cycling magnets. In this work we outline the design of a dipole magnet for 1.7 T gap magnetic field and discuss the helium coolant parameters for the minimal electric power
Jet tagging with the Lund Jet Plane
No full textThe Lund jet plane is a representation of the emissions within a jet, where each point corresponds to an emission. Hard and soft emissions, as well as colinear and wide-angle emissions, correspond to different regions of the Lund plane and are populated differently by jets with different origins. This means the Lund plane can be used for jet tagging. We present previous studies done in ATLAS on W and top tagging using the Lund plane and recent efforts to improve performance and to reduce background model dependence
Lattice Calculation of Short-Range Contributions to Neutrinoless Double-Beta Decay at Physical Pion Mass
No full textNeutrinoless double-beta () decays provide an excellent probe for determining whether neutrinos are Dirac or Majorana fermions. The short-range matrix elements associated with the process contribute at leading order in the decay channel through pion exchange between nucleons. However, current lattice calculations show notable discrepancies in predicting these short-range contributions. To address this issue, we perform a lattice QCD calculation of the matrix elements using domain wall fermion ensembles at the physical pion mass generated by the RBC and UKQCD Collaborations. To mitigate contamination from around-the-world effects, we develop a new method to reconstruct and subtract them directly from lattice data. We then perform a nonperturbative renormalization using the RI/SMOM scheme. Compared with previous studies, this work reduces the uncertainties in the matrix elements and provides an independent cross-check that helps to reconcile the discrepancies among previous lattice calculations
Student Sessions 2025
No full textUnderstanding neutrino interactions is key to unlocking the full physics potential of DUNE. In this talk, I present a novel data-driven strategy to estimate the cross-section ratio without relying on interaction models. By exploiting the unique off-axis capabilities of DUNE-PRISM, we construct optimized linear combinations of fluxes that closely replicate fluxes. This allows us to isolate the cross-section effects directly from event rates. The method combines flux matching, regularized minimization, and energy-weighted importance functions—offering a robust and transparent path toward precision neutrino physics
Student Sessions 2025
No full textPlease enter your presentation and a short description of your projec
