This talk presents recent precision measurements of key properties of the Standard Model and the Higgs boson at the LHC.
The description of physical systems depends on the resolution at which they are probed. Since the discovery of quarks, a central question in nuclear physics has been how to connect the traditional, low-resolution picture of nuclei in terms of protons and neutrons (nucleons) with the high-resolution description involving quarks and gluons. At the intersection of these two regimes are...
Although the origin of elements is a longstanding mystery, neutron capture processes are known to be a crucial mechanism by which nucleosynthesis can overcome the repulsive forces associated with adding another proton to a nucleus. Studies have identified at least three neutron capture processes believed to be taking place in astrophysics: the slow (s), rapid (r), and intermediate (i) neutron...
The ALPHA experiment at CERN’s Antiproton Decelerator is devoted to the study of the spectroscopic properties and gravitational behavior of anti-hydrogen. The comparison of these properties with those of hydrogen, which are known to great precision, may constitute a test of CPT, Lorentz Invariance, and the Weak Equivalence Principle.
To produce and confine antihydrogen, ALPHA relies on...
The Atacama Cosmology Telescope (ACT) collaboration presents cosmological constraints and data products from its sixth data release, DR6. Including data from 2017 - 2022 (the telescope decommissioning), DR6 observed 40% of the microwave sky to five times the angular resolution and three times the depth in polarization as the Planck satellite. The improved cosmic microwave background (CMB)...
Understanding the nature of dark matter is one of the biggest challenges in physics today. Over the past two decades, experiments searching for ~100 GeV dark matter particles have made incredible progress, gaining over five orders of magnitude in sensitivity, or doubling in sensitivity every 1.25 years. These experiments have grown from the the size of a small coffee cup to multi-ton detectors...
A greater than 5σ discrepancy in the measurement of the proton charge radius from the accepted value (0.88 fm) due to muonic hydrogen spectroscopy measurements (in 2010 and 2013) sparked the proton radius puzzle. Since then, many experiments have set out to measure the proton radius in an effort to elucidate the reason for this new disagreement. One such experiment was PRad (Proton Radius)...
The DAMIC-M (DArk Matter In CCDs at Modane) experiment employs silicon charged-coupled devices (CCDs) to search for sub-GeV dark matter particles with unprecedented sensitivity. Thanks to the sub-electron resolution and extremely low dark current of its skipper CCDs, DAMIC-M is particularly suited to probe dark matter candidates pertaining to the so-called "hidden sector." We will present the...
This contribution reports the latest result of the search for the charged lepton flavor violating decay μ+ → e+γ undertaken at the Paul Scherrer Institut in Switzerland with the MEG II experiment using the data collected in the 2021–2022 physics runs. The sensitivity of this search is 2.2 × 10−13, a factor of 2.4 better than the one with the full dataset of MEG and it was obtained in a data...
The past three decades of experimental neutrino measurements have accumulated observations of potential anomalous short-baseline flavor transformation from different sectors of varied neutrino source (proton accelerators, reactors, and intense radioactive sources) and energy (from sub-MeV to GeV scales). They serve as an intensifying experimental impetus for pursuing beyond Standard Model...
The Beryllium Electron-capture in Superconducting Tunnel junctions (BeEST) experiment is a precision search for BSM physics that measures the low-energy nuclear recoil from the EC decay of 7Be. In Phase-III, we have scaled the experiment to multipixel arrays of STJs as well as employing a range of systematics improvements on both the technical and spectral modeling aspects of the experiment. ...
Over the past 20 years, elements 114–118 have been successfully synthesized using 48Ca beams and actinide targets. However, creating elements beyond Oganesson (Z=118) is increasingly difficult due to the unavailability of suitable targets like Es (Z=99) and Fm (Z=100) in sufficient quantities, necessitating alternative reaction pathways. While theoretical models accurately predict production...
Permanent electric dipole moments (EDMs) sensitively probe parity and time-reversal violation, which are closely tied to CP-violation and the cosmological baryon asymmetry. An EDM collects many different effects into a single low-energy observable, representing a different admixture of fundamental sources for each measured system. Only by combining information from many diverse experiments and...
The forthcoming Mu2e and COMET experiments will search for electrons produced via the neutrinoless conversion of muons captured onto an aluminum nucleus, improving existing limits on charged lepton flavor violation (CLFV) by roughly four orders of magnitude and probing new physics at scales in excess of 10,000 TeV. If a positive signal is observed at Mu2e/COMET, the highest priority will be to...
The Facility for Rare Isotope Beams (FRIB) will provide unprecedented access to exotic nuclei; approximately 80% of the isotopes predicted to exist up to uranium (Z = 92) will be produced. The FRIB Decay Station (FDS) — an efficient, granular, and modular multi-detector system designed under a common infrastructure — will have a transformative impact on our understanding of nuclear structure,...
The Fermilab Muon g-2 Collaboration has now released two measurements of the anomalous magnetic moment of the positive muon ($a_μ$). The most recent result, published in 2023, confirms the initial 2021 result while achieving significantly reduced uncertainty, owing to improved systematic controls and a fourfold increase in statistical precision. Combined data brings the world average of the...
The Simons Observatory (SO) is a cosmic microwave background (CMB) experiment situated on the Chajnantor Plateau in Chile's Atacama Desert. The observatory comprises seven mm-wave telescopes operating across six frequency bands (30-280 GHz). Six 60cm Small Aperture Telescopes (SATs) focus on detecting primordial B-mode polarization signatures of cosmic inflation in two deep,...
In quantum chromodynamics (QCD), the baryon quantum number is a conserved quantity. It is traditionally assumed to be evenly distributed among valence quarks in nucleus. However, an alternative framework proposes that this number is carried by a non-perturbative, Y-shaped topology of gluons connecting to three quarks. While neither hypothesis has been conclusively verified experimentally, new...
The recent direct detection of high-energy neutrinos at the LHC has opened a new window into high-energy particle physics and highlighted the potential of neutrino physics for groundbreaking discoveries. I will give an overview of the physics potential of high-energy neutrino measurements at colliders with an emphasis on the connection between particle and astroparticle physics. I will discuss...
I will review where we are today with the three-flavor neutrino oscillation physics. I will then discuss the techniques to get at the remaining unknowns in neutrino oscillations: the atmospheric mass ordering, the octant of theta23, and the amount of CP violation. This requires combining the right aspects of the right data sets and understanding the complicated dance of neutrino oscillations...
Ultra-peripheral collisions (UPCs) are photon-mediated collisions between relativistic heavy ions, including photonuclear and two-photon reactions. They are the energy frontier for photonic interactions, with the gamma-p center of mass energies exceeding 5 TeV in proton-proton collisions, and per-nucleon center of mass energies above 700 GeV in gamma-lead collisions. After introducing UPCs,...
I will briefly review key observational evidence constraining the sources and properties of UHECRs, and show that it points to BNS mergers as the source. The main topic of the talk is predicting the spectrum and composition of UHECRs in the BNS merger scenario, which is possible to do in unprecedented specificity thanks to the source-to-source similarity of the ejecta. I use the...
Searches for physics beyond the Standard Model (BSM) remain a central focus of the LHC physics program. In this talk, I will present a selection of recent results from the ATLAS and CMS experiments that target a range of BSM scenarios, including new resonances, supersymmetry-inspired signatures, dark matter candidates, and other non-standard final states. The focus will be on analyses using...
A growing number of luminous optical transients from stellar explosions are believed to be powered by the interaction between ejected stellar material and a dense circumstellar medium. This interaction drives shock waves that can accelerate particles to multi-PeV energies, producing radiation across a broad range of wavelengths. In this talk, I will explore the connection between...
The Dark Energy Spectroscopic Instrument (DESI) is conducting the most precise spectroscopic survey of large-scale structure to date, measuring redshifts for tens of millions of galaxies and quasars. A key scientific objective of DESI is to map the imprint of Baryon Acoustic Oscillations (BAO), providing a robust standard ruler for cosmic expansion. In this talk, I will present the latest BAO...
The NA62 experiment at CERN collected the world's largest dataset of charged kaon decays, leading to the most precise measurement of the branching ratio of the ultra-rare $K^+ \rightarrow \pi^+ \nu \bar\nu$ decay. In this talk NA62 reports recent results from precision measurements of kaon and pion decays, using data samples collected in 2017-2018. A sample of $K^+ \rightarrow \pi^+ \gamma...
