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Radiative corrections: from medium to high energy experiments.
Eur Phys J A Hadron Nucl
April 2024
Institute of Nuclear Physics, Johannes Gutenberg-Universität, 55099 Mainz, Germany.
Radiative corrections are crucial for modern high-precision physics experiments, and are an area of active research in the experimental and theoretical community. Here we provide an overview of the state of the field of radiative corrections with a focus on several topics: lepton-proton scattering, QED corrections in deep-inelastic scattering, and in radiative light-hadron decays. Particular emphasis is placed on the two-photon exchange, believed to be responsible for the proton form-factor discrepancy, and associated Monte-Carlo codes.
View Article and Find Full Text PDFSearch for violation in decays in proton-proton collisions at .
Eur Phys J C Part Fields
December 2024
Article Synopsis
- The CMS experiment conducted a search for charge-parity violation in decays using proton-proton collision data from 2018, analyzing around 10 billion events with b hadrons decaying into charm hadrons.
- The flavor of the neutral D meson was determined through the charge of pions in the reconstructed decays, and an asymmetry measurement in the decays was reported, taking into account various uncertainties.
- This research marks the first asymmetry measurement by the CMS in the charm sector and the first to use a fully hadronic final state in such analyses.
Anomalies in Hadronic B Decays.
Phys Rev Lett
November 2024
Physique des Particules, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Quebec H2V 0B3, Canada.
In this Letter, we perform fits to B→PP decays, where B={B^{0},B^{+},B_{s}^{0}} and the pseudoscalar P={π,K}, under the assumption of flavor SU(3) symmetry [SU(3)_{F}]. Although the fits to ΔS=0 or ΔS=1 decays individually are good, the combined fit is very poor: there is a 3.6σ disagreement with the SU(3)_{F} limit of the standard model (SM_{SU(3)_{F}}).
View Article and Find Full Text PDFArticle Synopsis
- The study focuses on detecting multijet signatures from proton-proton collisions at a high energy of 13 TeV, analyzing a dataset totaling 128 fb^{-1}.
- A special data scouting method is utilized to pick out events with low combined momentum in jets.
- This research is pioneering in its investigation of electroweak particle production in R-parity violating supersymmetric models, particularly examining hadronically decaying mass-degenerate higgsinos, and it broadens the limits on the existence of R-parity violating top squarks and gluinos.
Phenomenology of photons-enriched semi-visible jets.
Eur Phys J C Part Fields
November 2024
ETH Zürich, Institute for Particle Physics and Astrophysics, 8093 Zurich, Switzerland.
Article Synopsis
- This letter proposes a new method for identifying confining dark sectors at the LHC through the detection of semi-visible jets resulting from collisions involving dark quarks from a hidden sector.
- It explains how these semi-visible jets can produce non-isolated photons and stable/unstable dark bound states, which may not align with current search strategies at the LHC.
- The authors suggest using a deep neural network to differentiate these exotic jets from background noise by analyzing their unique substructure, allowing for potential discoveries of heavy bosons with masses up to 5 TeV using data from the LHC's Run 2.
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