Belle II, as the upgrade of Belle, is aiming at searching for New Physics with 40 times higher luminosity. In order to cope with such a high luminosity, pure CsI scintillation crystals whose scintillation time is around 30 nanoseconds have been proposed. And silicon avalanche photodiodes, making up for the low light yield of pure CsI, are considered as photosensors. The application of the...
The JUNO (Jiangmen Underground Neutrino Observatory) experiment is under preparation in China by the international collaboration. The main goal of the project is to determine the neutrino mass hierarchy by precise measurement of the energy spectrum of the antineutrinos from the nuclear reactors with help of the 20 kt liquid scintillator underground detector located at a distance of 53 km. Data...
The Dark Energy Survey (DES) Collaboration is an international
astronomy collaboration of 400 scientists (graduate student to professor) from ~30 institutions. Our public outreach and professional development programs are unique grass-roots efforts that set new standards for large science collaborations. We describe several
programs in which scientists build networks of internal support,...
With many current and future neutrino experiments relying on Liquid Argon Time Projection Chamber (LArTPC) technology, characterizing the performance of these detectors is critical. The MicroBooNE LArTPC experiment is capable of performing
numerous measurements to better understand the technology. These include measurements of the levels of electronegative contamination using cosmic rays and...
MicroBooNE is a Liquid Argon Time Projection Chamber (LArTPC)
located in the Booster Neutrino Beam (BNB) at Fermi National Accelerator
Laboratory. This poster presents a study on charged particle multiplicity
(CPM) analysis based on a small sample of automatically and visually
identified neutrino events in the MicroBooNE detector. Initial comparison
of multiplicity distributions for data, BNB...
NOvA, a long-baseline neutrino oscillation experiment at Fermilab, is designed to
measure electron-neutrino appearance and muon-neutrino disappearance in the NuMI beam. NOvA comprises of two finely segmented liquid scintillator detectors at 14 mrad off-axis in the
NuMI beam. An accurate prediction of the neutrino flux is needed for precision oscillation and cross-section measurements. Data...
BaF$_2$ calorimeters are radiation-hard and have good energy resolution, but the time resolution can be a problem at high rate. Indeed, the scintillation light has both a fast (decay time 0.9 ns at 220 nm) and a larger, slow (decay time 650 ns at 300 nm) component. The slow component can worsen the excellent time resolution available from the fast component.
In order to take advantage of...
SBND (Short-Baseline Near Detector) will be a 112 ton liquid argon TPC neutrino detector located 110m from the target of the Fermilab Booster Neutrino Beam. SBND, together with the MicroBooNE and ICARUS-T600 detectors at 470m and 600m, respectively, make up the Fermilab Short-Baseline Neutrino (SBN) Program. SBN will search for new physics in the neutrino sector by testing the sterile...
The study of electroweak boson production is an important part of
characterizing the standard model and it can also shed a light on new
physics, in the form of anomalous gauge couplings. We present studies
based on the measurement of WW scattering, the electroweak production
of Z gamma + 2 jets and the study of gamma gamma->WW through the
exclusive WW production performed by the CMS...
There is a significant interest in achieving high-average power electron sources particularly in the area of electron sources integrated with Superconducting Radio Frequency (SRF) systems. For these systems, the electron gun and cathode parts are critical components for stable intensity and high-average powers. In this study, we will present the design of 8.5-cell accelerator cavity having...
Future energy-frontier electron-positron colliders will be capable of high-precision studies of the properties of the top quark. The measurement of the top-pair production cross section around the threshold provides access to the mass of the top quark in theoretically well-defined schemes, with statistical uncertainties of 20 MeV or less, depending on the assumed integrated luminosity of the...
We present a measurement of the production cross-section of charm mesons in proton-antiproton collisions at 1.96 TeV center-of-mass energy, using the full data set collected by the CDF experiment at the Tevatron collider in Run II. The measurement probes a yet unexplored low transverse-momentum range, down to 1.5 GeV/c, using events selected with criteria that bias minimally the features of...
Merged the following:
The NuMI Off-Axis νe Appearance (NOνA) experiment utilizes the neutrino beam produced at Fermilab, Neutrinos at the Main Injector (NuMI). The experiment consists of two detectors; the Near and Far Detectors are 810 km apart. The Near Detector, located at Fermilab, determines the initial state of the neutrino beam. In this poster, a muon neutrino selection and energy...
Signals of QCD instanton-induced processes are searched for in
deep-inelastic scattering (DIS) at the electron-proton collider HERA in the kinematic region defined by the Bjorken-scaling variable $x> 0.001$, the inelasticity $0.2< y< 0.7$ and the photon virtuality $150< Q^2<15000$ GeV$^2$. The search is performed using H1 data corresponding to an integrated luminosity of 350 pb$^{-1}$. Several...
Merged the following:
Contradictory evidence has been presented on the issue of neutrino mixing between the three known active neutrinos and light sterile neutrino species. Short-baseline neutrino oscillations observed by the LSND and MiniBooNE experiments, the collective evidence of the reactor neutrino anomaly, and the gallium anomaly all point towards sterile neutrinos with mass at the 1 eV...
The Mu2e experiment will search for neutrinoless conversion of muons into electrons
In the field of an aluminum nucleus. The signature of this process is an electron with
energy nearly equal to the muon mass. Precise and robust measurement of the outgoing
electron momentum, combined with other background rejection methods, is essential to the
experiment. We rely on a low-mass straw tube...
Minimum bias and underlying event data from the LHC and Tevatron have been used to tune the PYTHIA. We tune Multiple Parton Interaction (MPI) parameters including three Lambda parameters. It is shown that these tunings describe selected distributions quite well, especially pt distribution at three collision energies, 0.9 TeV , 1.9 TeV and 7 TeV provided that charge particles with pT > 500MeV...
Radio detector arrays such as RICE, ANITA, ARA, and ARIANNA target the discovery of both cosmogenic neutrinos and the sources of the PeV-scale astrophysical neutrinos observed by IceCube. These radio arrays exploit the Askaryan effect and the radio transparency of glacial ice, which together enables the economical instrumentation of necessarily large volumes of ice. We describe here the...
B-Lab is an open data analysis program to give members of the public a taste of particle physics by presenting tools to search real experimental data for particle decays. This program started as an outreach program for Belle experiment, targeting high school students. It utilizes an adapted data sample of 1.3 /fb of the real experimental e+e- collisions accumulated at KEK by the Belle...
The Deep Underground Neutrino Experiment (DUNE) will search for nucleon decay as one of its primary physics goals. Understanding the processes that mimic nucleon decay is critical, as these backgrounds affect the experiment’s reach and sensitivity. The backgrounds to nucleon decay can arise from atmospheric neutrino interactions and from cosmic ray interactions that result in neutral...
Merged the following:
The observation of neutrino oscillation provides evidence of physics beyond the standard model, and the precise measurement of those oscillations remains an important goal for the field of particle physics. NOνA will soon be one of the foremost experiments in that field. Taking advantage of a tightly focused off-axis view of the NuMI neutrino beam, and a finely...
The concept for the 10-kiloton scale Far Detector modules for the Deep Underground Neutrino Experiment (DUNE) utilizes liquid argon Time Projection Chambers (TPCs). To fully exploit the physics opportunities (measurement of CP violation in oscillations of beam neutrinos, plus non-beam based investigations including studies of supernova neutrino bursts and searches for nucleon decay), the...
JUNO is a Liquid Scintillator Antineutrino Detector (LAND) currently under construction in the south of China (Jiangmen city, Guangdong province). Once completed, it will be the largest LAND ever built, consisting in a 20 kt target mass made of Linear Alkyl-Benzene liquid scintillator, monitored by roughly ~18000 twenty-inch high-QE photomultipliers (PMTs) providing a ~80% photo-coverage....
After a short review on the status of QGP, we present a systematic analysis for the electromagnetic and the transport properties of this new-state-of-matter under extreme conditions of high temperature and density and finite magnetic and electric fields. The possible influences on the hadron-quark phase transition(s) and the QCD equations of state are determined from the mean field...
The Global Feature Extractor (gFEX) module is a component of the Level I trigger system for the ATLAS experiment planned for installation during the Phase I upgrade in 2018. This unique single ATCA board with multiple high speed processors on board will receive coarse-granularity information from all the ATLAS calorimeters enabling the identification in real time of large radius jets for...
The GlueX experiment at Jefferson Lab is a fixed target photoproduction experiment located in the newly-constructed Hall D. It is designed to study the spectroscopy of a variety of hadrons, with special emphasis on hybrid mesons. The experiment uses a 12 GeV electron beam incident on a diamond radiator to produce a linearly-polarized tagged bremsstrahlung photon beam of energies up to 12 GeV,...
The measurement of the differential cross-sections for a W (-> mu nu)
boson produced in association with jets is presented using 8 TeV
proton-proton collisions data recorded by the CMS detector at the LHC,
corresponds to an integrated luminosity of 19.6 fb-1. The differential
cross sections are measured as a function of jet multiplicity, the jet
pT and pseudorapidity, total hadronic activity...
We consider the measurement of the trilinear couplings
of the neutral Higgs bosons in the Minimal Supersymmetric
Standard Model (MSSM) at a high energy $e^+ e^-$ linear
collider in the light of the discovery of a Higgs
boson at the CERN Large Hadron Collider~(LHC). We identify the state
observed at the LHC with the lightest Higgs boson ($h^0$) of the MSSM,
and impose the constraints...
Production of top quark pairs in association with heavy Standard Model bosons or with heavy flavor quark-pairs is important both as a signal and a background in several ATLAS analyses. Strong constraints on such processes cannot at present be obtained from data, and therefore their modelling by Monte Carlo simulation as well as the associated uncertainties are important. This poster documents...
The possible existence of sterile neutrinos is an important unresolved question for both particle physics and cosmology. Data sensitive to a sterile neutrino is coming from both particle physics experiments and from astrophysical measurements of the Cosmic Microwave Background. In this study, we address the question whether these two contrasting data sets provide complementary information...
The NOvA experiment is a long-baseline neutrino oscillation experiment designed to measure the rate of electron neutrinos appearance in a muon neutrino beam. It consists of two finely segmented, liquid scintillator detectors at 14 mrad off-axis in the NuMI beam. The NOvA Near Detector, located at Fermilab, provides an excellent opportunity to study neutrino-nucleus interactions which are...
We present the performance of the CMS-CASTOR forward calorimeter
during LHC Run2 data taking at a centre-of-mass energy of 13 TeV.
Results on alignment and calibration are shown, together with a
summary of produced physics output.
The MINOS experiment made precision measurements of the neutrino
oscillation parameters that are governed by the atmospheric
mass-squared splitting. These measurements were made with data that
were collected while the NuMI muon neutrino beam operated in a low
energy mode that peaks around 3 GeV. Today the NuMI beam is running
with a higher energy mode that produces a neutrino energy...
The 40kt DUNE Far Detector, located at the Sanford Underground
Research Facility, will offer unique capabilities for the study of
atmospheric neutrinos. Due to the detector¹s excellent energy resolutions,
angular resolutions, and particle ID capabilities, atmospheric neutrino
analyses in DUNE can provide valuable information about 3-flavor
oscillations, despite the relatively modest...
PROSPECT is a phased experiment consisting of segmented $^6$Li-loaded liquid scintillator antineutrino detectors designed to probe short-baseline neutrino oscillations and precisely measure the reactor antineutrino spectrum.
The experiment will be located at the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory.
The first phase is a movable 3 tonne antineutrino detector...
Numerous surveys of modern particle physics indicate that the discipline is still largely a male pursuit, and one in which women and other marginalised groups continue to face discriminatory practices. The fraction of female particle physicists reduces with each career stage. Early career particle physicists face precarious employment conditions with serial short term contracts, long working...
Signal events where multiple missing neutral particles are present in
a final state represent challenging topologies to search for new
physics at the LHC. The key to any search is the ability to separate
background-like events from signal-like events. Identifying such
signal-like events, and extracting their properties, is exacerbated by
a lack of knowledge of the particle masses and some...
State-of-the-art theoretical predictions accurate to next-to-leading order QCD interfaced with Pythia8 and Herwig++ event generators are tested by comparing the unfolded ttbar differential data collected with the CMS detector at 8 TeV. These predictions are also compared with the underlying event activity distributions in ttbar events using CMS proton-proton data collected in 2015 at a center...
A new tracking system is under development for operation in the CMS
experiment at the High Luminosity LHC. It includes an outer tracker which
will construct stubs, built by correlating clusters in two closely spaced
sensor layers for the rejection of hits from low transverse momentum tracks,
and transmit them off-detector at 40 MHz. If tracker data is to contribute
to keeping the Level-1...