A5028440807- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- Superconducting Materials and Applications
- Radiation Therapy and Dosimetry
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Nuclear physics research studies
- Electron and X-Ray Spectroscopy Techniques
- Photocathodes and Microchannel Plates
- Gamma-ray bursts and supernovae
- Advanced Frequency and Time Standards
University of Iowa
2016-2025
Laboratoire Leprince-Ringuet
2024
Northern Illinois University
2019-2024
University of Göttingen
2024
Karlsruhe Institute of Technology
2024
Institut National de Physique Nucléaire et de Physique des Particules
2023-2024
Université Paris-Saclay
2023-2024
Max Planck Institute for Physics
2024
The University of Tokyo
2024
Universität Hamburg
2024
We observe a signal for the doubly charmed baryon Xi(+)(cc) in charged decay mode Xi(+)(cc)-->Lambda(+)(c)K-pi(+) data from SELEX, charm hadroproduction experiment at Fermilab. an excess of 15.9 events over expected background 6.1+/-0.5 events, statistical significance 6.3sigma. The observed mass this state is 3519+/-1 MeV/c(2). Gaussian width 3 MeV/c(2), consistent with resolution; its lifetime less than 33 fs 90% confidence.
The discovery by the ATLAS and CMS experiments of a new boson with mass around 125 GeV measured properties compatible those Standard-Model Higgs boson, coupled absence discoveries phenomena beyond Standard Model at TeV scale, has triggered interest in ideas for future factories. A circular e+e- collider hosted 80 to 100 km tunnel, TLEP, is among most attractive solutions proposed so far. It clean experimental environment, produces high luminosity top-quark, W Z studies, accommodates multiple...
Abstract The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) is designed to accurately observe ultra-high-energy cosmic rays (UHECRs) and neutrinos from space with sensitivity over the full celestial sky. POEMMA will air fluorescence produced by extensive showers (EASs) UHECRs potentially UHE above 20 EeV. Additionally, has ability Cherenkov signal upward-moving EASs induced Earth-interacting tau PeV. spacecraft are quickly re-orientate follow up transient neutrino sources obtain...
The status of the research on muon colliders is discussed and plans are outlined for future theoretical experimental studies. Besides continued work parameters a 3-4 0.5 TeV center-of-mass (CoM) energy collider, many studies now concentrating machine near 0.1 that could be factory s-channel production Higgs particles. We discuss various components in such colliders, starting from proton accelerator needed to generate pions heavy-Z target proceeding through phase rotation decay ($\pi \to \mu...
An analog hadron calorimeter (AHCAL) prototype of 5.3 nuclear interaction lengths thickness has been constructed by members the CALICE Collaboration. The AHCAL consists a 38-layer sandwich structure steel plates and highly-segmented scintillator tiles that are read out wavelength-shifting fibers coupled to SiPMs. signal is amplified shaped with custom-designed ASIC. A calibration/monitoring system based on LED light was developed monitor SiPM gain measure full response curve in order correct...
A bstract We describe a proposal to add set of very forward detectors the CMS experiment for high-luminosity era Large Hadron Collider search beyond standard model long-lived particles, such as dark photons, heavy neutral leptons, axion-like and Higgs bosons. The proposed subsystem is called FACET F orward- perture C MS E x T ension, will be sensitive any particles that can penetrate at least 50 m magnetized iron decay in an 18 long, 1 diameter vacuum pipe. products measured using identical...
The analyzing power AN in inclusive π− and π+ production has been measured with a 200 GeV/c transversely polarized antiproton beam over wide xF range (0.2≤xF≤0.9) at moderate pT (0.2≤pT≤1.5GeV/c). asymmetry increases increasing from zero to large positive values for π−'s, decreases negative π+'s. A threshold the onset of is observed about pT∼0.5GeV/c, below which essentially above (decreases) π−'s ( π+'s) covered range.Received 17 April...
The studies presented in this paper provide a first experimental test of the Particle Flow Algorithm (PFA) concept using data recorded high granularity calorimeters. Pairs overlaid pion showers from CALICE 2007 beam are reconstructed by PandoraPFA program developed to implement PFA for future lepton collider. Recovery neutral hadron's energy vicinity charged hadron is studied. impact two overlapping on resolution investigated. dependence confusion error distance between 10 GeV and derived...
The RADiCAL Collaboration is conducting R&D on precision-timing electromagnetic (EM) calorimetry to address the challenges expected in future collider experiments under conditions of high luminosity and/or irradiation such as those at FCC-ee and FCC-hh colliding beam facilities. Under development are sampling calorimeter structures known modules, based scintillation wavelength-shifting (WLS) technologies, read out by SiPM photosensors. module test described here consists alternating...
Secondary electron emission is the primary signal formation and/or amplification technique utilized in accelerator beam monitors and photomultiplier tubes where incident energetic particles cause ejection of additional electrons from a secondary surface. The materials employed as surfaces for have demonstrated exceptional resistance to radiation, making them suitable serving active media radiation-hard calorimeters. With this motivation, we developed dedicated sensor modules, tested with...
The CMS-HF Calorimeter is designed to detect forward going particles. Discovery type events are believed produce high energy particles at angles. Hence, it important determine the particle energies accurately by making sure that detectors have right calibration all time. calorimeters quartz fibers as active element. Particle showers caused travelling through calorimeter Cherenkov light in fibers. determined from signals produced PMTs reaching them. Damage radiation during collisions...
We present the results of tests performed on 90 photomultiplier tubes (PMT) to characterize their afterpulses. Three different types Hamamatsu PMTs (R7525, R6427, and R1398) were studied for afterpulse rates timings at incident light intensities gain values, University Iowa PMT test station. Afterpulse show slight increase with gain, but there is almost no dependence intensity. specific time delays are determined afterpulses, individual rate contributions characterized. The from...
A rapidity gap program with great potential can be realised at the Large Hadron Collider, LHC, by adding a few simple forward shower counters (FSCs) along beam line on both sides of main central detectors, such as CMS. Measurements single diffractive cross sections down to lowest masses made an efficient level-1 trigger. Exceptionally, detectors also make feasible study Central Diffractive Excitation, and in particular reaction g+g→g+g, color singlet channel, effectively using LHC...
The calibration procedure of a finely granulated digital hadron calorimeter with Resistive Plate Chambers as the active elements is described. Results obtained stack nine layers exposed to muons from Fermilab test beam are presented.
A prototype silicon-tungsten electromagnetic calorimeter for an ILC detector was tested in 2007 at the CERN SPS test beam. Data were collected with electron and hadron beams energy range 8 to 80 GeV. The analysis described here focuses on interactions of pions calorimeter. One main objectives CALICE program is validate Monte Carlo tools available design a full-sized detector. Si-W are therefore confronted predictions various physical models implemented GEANT4simulation framework.