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Search for light long-lived particles decaying to displaced jets in proton-proton collisions ats=13.6 TeV.
Rep Prog Phys
February 2025
CERN, Geneva, Switzerland.
A search for light long-lived particles (LLPs) decaying to displaced jets is presented, using a data sample of proton-proton collisions at a center-of-mass energy of 13.6 TeV, corresponding to an integrated luminosity of 34.7 fb, collected with the CMS detector at the CERN LHC in 2022.
View Article and Find Full Text PDFPhenomenology 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.
Improved Statistics for F-theory Standard Models.
Commun Math Phys
November 2024
Department of Mathematics, University of Pennsylvania, Philadelphia, PA 19104-6396 USA.
Much of the analysis of F-theory-based Standard Models boils down to computing cohomologies of line bundles on matter curves. By varying parameters one can degenerate such matter curves to singular ones, typically with many nodes, where the computation is combinatorial and straightforward. The question remains to relate the (a priori possibly smaller) value on the original curve to the singular one.
View Article and Find Full Text PDFSearch for Light Long-Lived Particles in pp Collisions at sqrt[s]=13 TeV Using Displaced Vertices in the ATLAS Inner Detector.
Phys Rev Lett
October 2024
CERN, Geneva, Switzerland.
Article Synopsis
- - The ATLAS experiment at the LHC conducted a search for long-lived particles (LLPs) using a large dataset (140 fb^{-1}) from proton-proton collisions at 13 TeV, focusing on LLPs with masses from 5 to 55 GeV that decay within the inner detector.
- - The study considered scenarios where LLPs are produced from exotic Higgs boson decays and models involving axionlike particles (ALPs).
- - No significant findings above expected background levels were detected, leading to the establishment of upper limits on various production rates involving the Higgs boson and the top quark related to LLPs and ALPs.
Hunting for Bileptons at Hadron Colliders.
Entropy (Basel)
October 2024
INFN, Laboratori Nazionali di Frascati, Via E. Fermi 54, 00044 Frascati, Italy.
I review possible signals at hadron colliders of bileptons, namely doubly charged vectors or scalars with lepton number L=±2, as predicted by a 331 model, based on a SU(3)c×SU(3)L×U(1)X symmetry. In particular, I account for a version of the 331 model wherein the embedding of the hypercharge is obtained with the addition of three exotic quarks and vector bileptons. Furthermore, a sextet of SU(3)L, necessary to provide masses to leptons, yields an extra scalar sector, including a doubly charged Higgs, i.
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