Institute For Interdisciplinary Research in Science and Education
ICISE center, Quy Nhon, VN.
Neutrino Group Seminars
To discuss the recent progress in neutrino science, including, but is not limited to, nature of neutrino mass , CP violation search, mass hierarchy determination, sterile neutrino...; novel techniques used for particle and nuclear physics; and incredible technology involved. To get notification of webinar, subscribe mailing list .Visit Neutrino Group, ICISE .
Upcoming Events
Past Events
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(Feb. 26 - Mar. 4, 2023),
ICISE2nd Hardware Camp for Fast and Low-Light detection
MoreHere, "fast" refers to nanoseconds, and "low-light" refers to a few to hundreds of photoelectrons. The goal is to give students hands-on experience with the single photo-resolving photomultiplier (siPM and PMT), plastic scintillator, light source, electronic, and data acquisition (DAQ) used in particle and nuclear physics experiments.
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(2022-04-15),
Zoom onlyDr. Christoph Ternes (INFN, Turin, Italy)
"Neutrinos and CPT violation" MoreIn the first part of the talk I give an overview of standard neutrino oscillations. I discuss the current status of the determination of neutrino oscillation parameters and focus on the remaining unknowns. In the second part I discuss current bounds on CPT violating neutrinos. In this scenario it is assumed that oscillation parameters describing neutrinos can differ from the oscillation parameters describing antineutrinos. I show current bounds on the differences of neutrino and antineutrino parameters and show how these bounds could be improved with future measurements, particulary in the context of DUNE.
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(6-11, Mar. 2022),
ICISEHardware Camp for Fast and Low-Light detection
MoreHere, "fast" refers to nanoseconds, and "low-light" refers to a few to hundreds of photoelectrons. The goal is to give students hands-on experience with the single photo-resolving photomultiplier (siPM and PMT), plastic scintillator, light source, electronic, and data acquisition (DAQ) used in particle and nuclear physics experiments.
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(2022-02-17),
Zoom onlyDr. Yuto Ohashi (Project promotion Group, Business Promotion, Solid State Division, Hamamatsu Photonics K.K. )and Dr. Kensuke Suzuki (Business Promotion Group No.1, Electron Tube Division, Hamamatsu Photonics K.K.)
Current status of Hamamatsu detectors for High energy physics MoreHamamatsu Photonics has been producing many sensors like a photomutiplier tube (PMT) to HEP (High energy physics) experiments. The MPPC, which is a part of the SiPM family, was developed about 10 years ago. The most important feature is its photon counting capability due to high gain and low noise, but the MPPC has many additional features such as compact size, low operation voltage, robustness, high detection efficiency, and immunity to magnetic field. Many scientists have used MPPCs for HEP experiments like T2K experiment and MEG-II experiment. In this presentation, we will discuss the features of MPPCs for HEP experiments. And we will talk about the feature of developing MPPCs. Also, on this occasion, we will show the basics and the applications for PMTs, and we will introduce our PMT lineup which is being widely used for HEP experiments.
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(2021-11-25),
Zoom onlyProf. Justin Evans, Univ. of Manchester, UK
"New results from MicroBooNE" MoreThe MicroBooNE liquid-argon time-projection chamber sits in the Booster Neutrino Beam at Fermilab. Having taken data since 2015, MicroBooNE has illustrated the power of liquid argon for precision neutrino physics with a wide array of measurements including cross-section measurements, detector physics studies and beyond-Standard-Model searches. Recently, MicroBooNE has released results of its first search for a low-energy excess of electromagnetic activity, motivated by investigating the excess previously seen by MiniBooNE. I will present MicroBooNE’s search, which uses six different channels and three independent event-reconstruction frameworks, to search for both electron and photon excesses.
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(2021-07-08),
Zoom onlyDr. Yosuke ASHIA
"Diffuse Supernova Neutrino Background Search at Super-Kamiokande" MoreAbstract: Diffuse supernova neutrino background (DSNB) as the integrated flux from all past core-collapse supernova explosions, if detected, would be a probe to explore the supernova mechanism as well as stellar evolution. In this talk, I will present a short review of theoretical and experimental status of the DSNB studies and a recent search result from Super-Kamiokande with an improved sensitivity. The presentation will be based on arXiv:2109.11174.
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(2021-07-08),
Zoom onlyProf. Jennifer Thomas (UCL, UK) and Dr. Josh Tingey (UCL, Research scientist intern at Spotify)
"CHIPS and machine learning application" MoreAbstract: CHIPS was a 5 kton WC detector, constructed in 2019 to demonstrate a number of ideas associated with bringing the cost of neutrino detectors to a level where arrays of such detectors could be envisioned in order to potentially achieve greater precision on the neutrino oscillation parameters for a much lower cost. We will outline the cost-saving concepts and describe the construction process. Modern Machine Learning algorithms (specifically convolutional neural networks) were introduced to characterise raw neutrino events recorded within CHIPS. The performance gains from this new methodology were significant enough to alleviate the comparatively low density of instrumentation on the inner surface of the WC detector. We will detail how these algorithms were implemented and the specific challenges of applying them to WC detectors.
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(2021-06-10), 9:00 (GMT+7)
Zoom onlyAssi. Prof. Tomoyuki Konno ,Kitasato Univ., JP
"PANDA : neutrino detector for reactor monitor" MoreIn a commercial reactor of 3 GWth, neutrinos of 10 to the power of 20 per second are produced among the beta-decay chain of the fission product. The production rate and spectrum are well known as a function of ratio among the fuel nuclides. Therefore, the reactor originated anti-electron neutrino (reactor neutrino) is much useful not only for neutrino science but also for safeguard of reactor nuclear power. There are many activities of developments reactor neutrino detectors over the world. The PANDA (Plastic Anti-electron Neutrino Detector Array) is a project of reactor neutrino monitor in Japan. The detector is made of 10 x 10 of the organic plastic scintillator bars with a total weight of 1 ton as the target of inverse beta decay interaction and the calorimeter of the emitted positron. We carried out a measurement of reactor neutrino at the Ohi reactor power plant at Fukui, Japan, in 2019 and 175.8±34.4 events of the neutrino signals are observed by a comparison of the reactor ON and OFF periods. In this talk, we introduce basics of reactor monitoring with neutrino and the activities of the reactor neutrino detectors. Then, we discuss the PANDA results and future.
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(2021-05-06),
Zoom onlyDr. Nam Tran ,Boston Univ., US
"A Measurement of Positive Muon Anomalous Magnetic Moment to 0.46 ppm" MoreThe anomalous magnetic moment of the muon can be both measured and calculated to extraordinary precisions, and the long-standing discrepancy between the two numbers remains one of the most tantalizing hints of new physics beyond the standard model. The Muon g-2 experiment at Fermilab is a new measurement of the anomaly, aims to improve the precision of the experimental value by 4 times. The first result of the Muon g-2 experiment using data collected in 2018 shows a 3.3 standard deviations from the standard model prediction and is in excellent agreement with the previous Brookhaven National Laboratory (BNL) E821 measurement. After combination with the E821 result, the new experimental average of the anomaly is at 4.2 standard deviations tension with theoretical value.
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(2021-04-15),
Zoom onlyProf. Makoto Miura ,ICRR, Univ. of Tokyo, Japan
"Proton decay search with Super-Kamiokande" MoreProton decay, which is predicted by Grand Unified Theories, is the key for beyond the Standard Model. Many detectors have been built to search for the nucleon decays but they have not been observed yet. Super-Kamiokande is the largest detector to hunt the nucleon decays in the world and I will discuss about the latest results from Super-Kamiokande.
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(2021-02-26),
Zoom onlyMs. Abigail Kopec (on behalf of XENON collaboration) , Purdue University, US
"XENON1T: a Prolific Rare Event Search Experiment" MoreOur astrophysical observations indicate that there is an enormous amount of mass in the Universe that we cannot see, which we call dark matter. We cannot easily explain this matter with the known particles in the standard model, indicating that the quantum of dark matter is some new particle. The XENON Collaboration uses liquid xenon time projection chambers to look for signatures of interacting dark matter in these ultra-low background particle detectors. The recent XENON1T detector holds the leading limits on the interactions of spin independent weakly interacting massive particles and made significant contributions to constraining other models. We recently noted an excess of low energy electronic recoil events with over a three-sigma significance. In this talk I will introduce the XENON1T detector in the context of what we already know about dark matter and give a summary of this impressive experiment.
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(2021-01-06),
Zoom onlyPhan Quoc Vuong ,HEP lab, Kyungpook National Univ., Korea
"Single crystal growth and characterization of scintillation materials for radiation detection in various fields" MoreScintillator is a key component in many scientific instruments which are widely used for nuclear physics, high energy physics, space exploration, medical imaging, radiation monitoring, and well logging etc. I will describe several common techniques for the crystal growth of inorganic materials. Some successfully grown crystals at KNU by the Bridgman method and their scintillation properties will be presented. I also give an overview of progress in developing inorganic single crystals for 0νββ search with the AMORE experiment.
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(2020-12-04),
Zoom onlyHidekazu Kakuno ,Tokyo Metropolitan Univ., Japan
"Investigation of the Internal Structure of a Large Object using Cosmic Muon Radiography" MoreThe method of cosmic muon radiography can be used to visualize the internal stucture of a large object such as a (small) volcano or a pyramid. In this webinar, I report the investigation of cores of reactors at the Fukushima Daiichi nuclear power plant using cosmic muon radiography. I also report the R&D of the method of muon radiography that can be used for a relatively large volcano.
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(2020-11-12),
Zoom onlyDam Thanh Son ,Univ. of Chicago, US
"Quantum field theory as a common language of particle and condensed matter physics" MoreInteraction between particle and condensed matter physics has lead to progress in both fields. I will describe a few examples of such interaction: symmetry breaking, renormalization group, and duality. The examples emphasize the role of quantum field theory as common language of physics.
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( 2020-10-29),
Zoom onlyKhai Bui , Osaka Univ., US
Energy resolution of CANDLES detector for studying neutrino-less double beta decay of 48Ca MoreNeutrino-less double beta decay (0νββ) is useful for determining the neutrino mass and confirming the Majorana nature of neutrino. In a 0νββ experiment, an irremovable two-neutrino double beta decay (2νββ) background surrounds the Q-value of the double-beta-decay isotope. The energy resolution must be improved to differentiate between 0νββ and 2νββ events. CAlcium fluoride for studies of Neutrino and Dark matters by Low Energy Spectrometer (CANDLES) aims to obtain the 0νββ of 48Ca by using CaF2(un-doped, non-enriched) scintillator crystals as detectors and sources. Scintillation photons are collected by surrounding photomultiplier tubes (PMTs). Ideally, the energy resolution should equal the statistical fluctuation of the number of photoelectrons. At the Q-value of 48Ca, the current energy resolution (2.6%) exceeds this fluctuation (1.6%). Because of CaF2’s long decay constant of 1000 ns, a signal integration in 4000 ns is used to calculate the energy. The baseline fluctuation (σbaseline) is accumulated in the signal integration, degrading the energy resolution. Therefore, this paper studies the σbaseline in the CANDLES III detector, which has a severe effect (1%) at the Q-value of 48Ca. To avoid σbaseline, photon counting can be used to obtain the number of photoelectrons in each PMT; however, a significant photoelectron signal overlapping probability in each PMT causes missing photoelectrons in counting and reduces the energy resolution. “Partial photon counting” reduces the σbaseline and minimizes photoelectron loss. We thus obtain improved energy resolutions of 4.5--4.0% at 1460.8 keV (γ-ray of 40K), and 3.3--2.9% at 2614.5 keV (γ-ray of 208Tl). The energy resolution at the Q-value shows an estimated improvement of 2.2%, with improved detector sensitivity by factor 1.09 for the 0νββ half-life of 48Ca. In this talk, I also discuss a possibility to improve CANDLES energy resolution when applying photon counting for CaF2(un-doped) operated at low temperatures. It is estimated to achieve the sensitivity close to (or can be better than) the current world-best limit of effective neutrino mass.
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2020-09-24,
Zoom onlyNhan Tran ,Fermilab, US
"Fast machine learning for physics, detectors, and computing " MoreWe will discuss the growing research area at the intersection of machine learning, detector hardware, and heterogeneous computing. We envision this will advance the overall output and sensitivity of particle physics experiments, enable intelligent and autonomous detectors, and solve mounting online and offline computing challenges. Two specific examples will be given. First, we will discuss neural networks implemented in on-detector electronics for powerful real-time filtering at the LHC. Then, we will discuss a recent result for GPU-accelerated neutrino computing workflows accelerating ProtoDUNE reconstruction by nearly 3x with optimized GPU resource utilization.
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2020-09-03,
Zoom onlyDung Phan ,Univ. of Texas at Austin
"A Search for Neutron-Antineutron Oscillation in the NOvA Experiment" MoreSearching for neutron-antineutron oscillation is an active research direction that promises immense values for field of particle physics and cosmology. An experi- mental observation of the phenomenon offers the possibility of new physics associ- ated with anomalous B and/or B − L violating processes. A data-driven trigger that allows NOvA - a long baseline neutrino oscillation experiment - to collect the neutron-antineutron oscillation candidates will be described in detail. An analysis approach in which the real data is partially unblinded to assist the development and evaluation of the event selection and background normalization is chosen for this search. Due to the fact that this is an ongoing work and important aspects of the analysis has not been all finalized, we conclude with a sensitivity study. By analyzing the data from 4 months of the NOvA’s Far Detector exposure, a 90% C.L. sensitivity limit of 4 × 1030 years was placed on the oscillation life-time of bound neutrons from the 12C targets. This is equivalent to a sensitivity of 0.57 × 108 s placed on the oscillation life-time of free neutrons.
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2020-08-20,
Zoom onlyTsuyoshi Nakaya ,Kyoto Univ. JP
"Neutrino Physics in Japan with a gigantic detector, Super-Kamiokande" MoreNeutrinos are mysterious particles in our universe. We observe neutrinos from the Sun, Atmosphere, Supernova, Reactors, and Accelerators. In the study of neutrinos, we explore particle physics, astrophysics, and cosmology. In Japan, neutrino physics is very popular with two Nobel prizes: One is to Prof. Masatoshi Koshiba with the observation of supernova neutrinos and the second is to Prof. Takaaki Kajita with the discovery of neutrino oscillations. In this webinar, we introduce Neutrino Physics in Japan conducted with a gigantic neutrino detector, Super-Kamiokande. Super-Kamiokande is the detector by which we discover neutrino oscillations from atmospheric neutrinos. Besides, Super-Kamiokande observes neutrinos from Sun and accelerators. In Japan, we have a powerful accelerator (called J-PARC) that provides the most intense neutrino beam in the world. By using the accelerator neutrino beam, we conduct the neutrino experiment T2K to study neutrino oscillations in detail. We report the Super-K and T2K experiments in the webinar. In 2020, a new and larger detector than Super-Kamiokande, "Hyper-Kamiokande", is approved in Japan for further studies of neutrinos. We also introduce the Hyper-Kamiokande project briefly.
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2020-08-20,
Zoom onlyJessica Turner, Fermilab Us
"Leptogenesis and Low Energy CP Violation" MoreI will provide a general overview of the matter anti-matter asymmetry and how this can be linked to the generation of light neutrino masses. I will discuss the possibility of producing the observed baryon asymmetry of the Universe via thermal leptogenesis, where CP violation comes exclusively from the low-energy phases of the neutrino mixing matrix. We demonstrate the viability of thermal leptogenesis across seven orders of magnitude 10^6 < T (GeV)< 10^13. We clarify that at very high scales T > 10^12 GeV is sensitive to the low-energy phases, in contradiction with what is usually claimed in the literature.
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2020-07-03
Zoom onlyDien Nguyen,JLab & MIT
"Probing few-body nuclear dynamics via 3H and 3He (e,e’p)pn cross-section"report the first measurement of the (e,e’p) three-body breakup reaction cross sections in helium-3 (3He) and tritium (3H) at large momentum transfer (Q 2 ~ 1.9 (GeV/c)2) and (xB > 1) kinematics, where the cross section should be sensitive to quasielastic (QE) scattering from single nucleons
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2019-10-08
ICISE & ZoomAnkur Nath, Tezpur Univ., IN,
"CP violation with T2HK"A visiting summary report: explore CP violation with T2HK experiment
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2019-08-10
ICISEHao Tran Hue Univ., VN
"(d,p) reactions based on Faddeev-Alt-Grassberger-Sandhas formalism"In nuclear reactions, Faddeev-Alt-Grassberger-Sandhas (FAGS) equations are well known the only existing formalism which can describe simultaneously and exactly the elastic, inelastic, and rearrangement process. However, the most performance FAGS code is still limited at the medium targets due to the long-range character of Coulomb interaction. In this talk, we discuss our efforts to overcome this barrier. Also, we make a review of recent progress in developing the microscopic optical potential which is a crucial ingredient for the (d,p) codes.
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2019-08-10
ICISEChau Nguyen Univ. of Siegen, GE
"Einstein-Podolsky-Rosen paradox, Bell inequalities, entanglement and quantum steering"a simple introduction to the Einstein-Podolsky-Rosen thought experiment, followed by insights given by Schrödinger and a short (and necessarily incomplete) introduction to their further implications. We then discuss the modern approaches: Bell inequalities, separability, quantum steering, and their imprints in the theory of quantum information processing and the foundation of quantum mechanics.
Contact
Asso. Prof. Van Nguyen nhvan@iop.vast.ac.vn and Dr. Son Cao, cvson@ifirse.icise.vn for more information