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Measurement of cosmic-ray muon spallation products in a xenon-loaded liquid scintillator with KamLAND

Physical Review C 2023年第5期107卷 054612-054612页

作者： S. Abe S. Asami M. Eizuka S. Futagi A. Gando Y. Gando T. Gima A. Goto T. Hachiya K. Hata K. Hosokawa K. Ichimura S. Ieki H. Ikeda K. Inoue K. Ishidoshiro Y. Kamei N. Kawada Y. Kishimoto M. Koga M. Kurasawa T. Mitsui H. Miyake T. Nakahata K. Nakamura R. Nakamura H. Ozaki T. Sakai I. Shimizu J. Shirai K. Shiraishi A. Suzuki Y. Suzuki A. Takeuchi K. Tamae H. Watanabe Y. Yoshida S. Obara A. K. Ichikawa S. Yoshida S. Umehara K. Fushimi K. Kotera Y. Urano B. E. Berger B. K. Fujikawa J. G. Learned J. Maricic S. N. Axani Z. Fu J. Smolsky L. A. Winslow Y. Efremenko H. J. Karwowski D. M. Markoff W. Tornow S. Dell'Oro T. O'Donnell J. A. Detwiler S. Enomoto M. P. Decowski K. M. Weerman C. Grant A. Li H. Song Research Center for Neutrino Science Tohoku University Sendai 980-8578 Japan Department of Human Science Obihiro University of Agriculture Veterinary Medicine Obihiro Hokkaido 080-8555 Japan Institute for the Physics and Mathematics of the Universe The University of Tokyo Kashiwa 277-8568 Japan Graduate Program on Physics for the Universe Tohoku University Sendai 980-8578 Japan Frontier Research Institute for Interdisciplinary Sciences Tohoku University Sendai 980-8578 Japan Department of Physics Tohoku University Sendai 980-8578 Japan Graduate School of Science Osaka University Toyonaka Osaka 560-0043 Japan Research Center for Nuclear Physics (RCNP) Osaka University Ibaraki Osaka 567-0047 Japan Graduate School of Advanced Technology and Science Tokushima University Tokushima 770-8506 Japan Graduate School of Integrated Arts and Sciences Tokushima University Tokushima 770-8502 Japan Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Department of Physics and Astronomy University of Hawaii at Manoa Honolulu Hawaii 96822 USA Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Physics and Astronomy University of Tennessee Knoxville Tennessee 37996 USA Triangle Universities Nuclear Laboratory Durham North Carolina 27708 USA The University of North Carolina at Chapel Hill Chapel Hill North Carolina 27599 USA North Carolina Central University Durham North Carolina 27701 USA Physics Department at Duke University Durham North Carolina 27705 USA Center for Neutrino Physics Virginia Polytechnic Institute and State University Blacksburg Virginia 24061 USA Center for Experimental Nuclear Physics and Astrophysics University of Washington Seattle Washington 98195 USA Nikhef and the University of Amsterdam Science Park Amsterdam the Netherlands Boston University Boston Massachusetts 02215 USA

Cosmic-ray muons produce various radioisotopes when passing through material. These spallation products can be backgrounds for rare event searches such as in solar neutrino, double-β decay, and dark matter search experiments. The KamLAND-Zen experiment searches for neutrinoless double-β decay in 745 kg of xenon dissolved in liquid scintillator. The experiment includes dead-time-free electronics with a high efficiency for detecting muon-induced neutrons. The production yields of different radioisotopes are measured with a combination of delayed coincidence techniques, newly developed muon reconstruction, and xenon spallation identification methods. The observed xenon spallation products are consistent with results from the fluka and geant4 simulation codes.

关键词： Nuclear reactions Nuclear structure & decays Cosmic ray & astroparticle detectors

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Vacuum Ultraviolet Light-Generating Metalens

Vacuum Ultraviolet Light-Generating Metalens

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Ming Lun Tseng Michael Semmlinger Ming Zhang Catherine Arndt Tzu-Ting Huang Jian Yang Hsin Yu Kuo Vin-Cent Su Mu Ku Chen Cheng Hung Chu Benjamin Cerjan Din Ping Tsai Peter Nordlander Naomi J. Halas Institute of Electronics National Yang Ming Chiao Tung University Hsinchu Taiwan Research Center for Applied Sciences Academia Sinica Taipei Taiwan Department of Electrical and Computer Engineering Rice University Houston Texas USA Laboratory for Nanophotonics Rice University Houston Texas USA Applied Physics Graduate Program Rice University Houston Texas USA Department of Physics and Astronomy Rice University Houston Texas USA Department of Physics National Taiwan University Taipei Taiwan Department of Electrical Engineering National United University Miaoli Taiwan Department of Electrical Engineering City University of Hong Kong Kowloon Hong Kong Department of Chemistry Rice University Houston Texas USA

Vacuum ultraviolet (VUV) light is of great importance to many applications such as photochemistry and nanolithography. In this talk, a nonlinear metalens composed of ZnO nanoantennas for VUV generation and focusing wi...

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First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND

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Physical Review D 2023年第7期107卷 072006-072006页

作者： S. Abe S. Asami M. Eizuka S. Futagi A. Gando Y. Gando T. Gima A. Goto T. Hachiya K. Hata K. Ichimura S. Ieki H. Ikeda K. Inoue K. Ishidoshiro Y. Kamei N. Kawada Y. Kishimoto M. Koga M. Kurasawa T. Mitsui H. Miyake T. Nakahata K. Nakamura R. Nakamura H. Ozaki T. Sakai I. Shimizu J. Shirai K. Shiraishi A. Suzuki Y. Suzuki A. Takeuchi K. Tamae H. Watanabe Y. Yoshida S. Obara A. K. Ichikawa S. Yoshida S. Umehara K. Fushimi K. Kotera Y. Urano B. E. Berger B. K. Fujikawa J. G. Learned J. Maricic S. N. Axani Z. Fu J. Smolsky L. A. Winslow Y. Efremenko H. J. Karwowski D. M. Markoff W. Tornow J. A. Detwiler S. Enomoto M. P. Decowski C. Grant A. Li H. Song S. Dell’Oro T. O’Donnell Research Center for Neutrino Science Tohoku University Sendai 980-8578 Japan Department of Human Science Obihiro University of Agriculture and Veterinary Medicine Obihiro 080-8555 Japan Kavli Institute for the Physics and Mathematics of the Universe (WPI) The University of Tokyo Institutes for Advanced Study The University of Tokyo Kashiwa Chiba 277-8583 Japan Graduate Program on Physics for the Universe Tohoku University Sendai 980-8578 Japan Frontier Research Institute for Interdisciplinary Sciences Tohoku University Sendai 980-8578 Japan Department of Physics Tohoku University Sendai 980-8578 Japan Graduate School of Science Osaka University Toyonaka Osaka 560-0043 Japan Research Center for Nuclear Physics Osaka University Ibaraki Osaka 567-0047 Japan Department of Physics Tokushima University Tokushima 770-8506 Japan Graduate School of Integrated Arts and Sciences Tokushima University Tokushima 770-8502 Japan Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Department of Physics and Astronomy University of Hawaii at Manoa Honolulu Hawaii 96822 USA University of Delaware Newark Delaware 19716 USA Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Physics and Astronomy University of Tennessee Knoxville Tennessee 37996 USA Triangle Universities Nuclear Laboratory Durham North Carolina 27708 USA Physics Departments at Duke University Durham North Carolina 27708 USA North Carolina Central University Durham North Carolina 27707 USA and The University of North Carolina at Chapel Hill Chapel Hill North Carolina 27599 USA Center for Experimental Nuclear Physics and Astrophysics University of Washington Seattle Washington 98195 USA Nikhef and the University of Amsterdam Science Park Amsterdam The Netherlands Boston University Boston Massachusetts 02215 USA Center for Neutrino Physics Virginia Polytechnic Institute and State University Blacksburg Virginia 24061 US

We report a measurement of the strange axial coupling constant gAs using atmospheric neutrino data at KamLAND. This constant is a component of the axial form factor of the neutral-current quasielastic (NCQE) interaction. The value of gAs significantly changes the ratio of proton and neutron NCQE cross sections. KamLAND is suitable for measuring NCQE interactions as it can detect nucleon recoils with low-energy thresholds and measure neutron multiplicity with high efficiency. KamLAND data, including the information on neutron multiplicity associated with the NCQE interactions, makes it possible to measure gAs with a suppressed dependence on the axial mass MA, which has not yet been determined. For a comprehensive prediction of the neutron emission associated with neutrino interactions, we establish a simulation of particle emission via nuclear deexcitation of C12, a process not considered in existing neutrino Monte Carlo event generators. Energy spectrum fitting for each neutron multiplicity gives gAs=−0.14−0.26+0.25, which is the most stringent limit obtained using NCQE interactions without MA constraints. The two-body current contribution considered in this analysis relies on a theoretically effective model and electron scattering experiments and requires future verification by direct measurements and future model improvement.

关键词： Neutrinos

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Soliton walls paired by polar surface interactions in a ferroelectric nematic liquid crystal

arXiv

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arXiv 2022年

作者： Basnet, Bijaya Rajabi, Mojtaba Wang, Hao Kumari, Priyanka Thapa, Kamal Paul, Sanjoy Lavrentovich, Maxim O. Lavrentovich, Oleg D. Advanced Materials and Liquid Crystal Institute Kent State University KentOH44242 United States Materials Science Graduate Program Kent State University KentOH44242 United States Department of Physics Kent State University KentOH44242 United States Department of Physics and Astronomy University of Tennessee KnoxvilleTN37996 United States

Surface interactions are responsible for many properties of condensed matter, ranging from crystal faceting to the kinetics of phase transitions. Usually, these interactions are polar along the normal to the interface and apolar within the interface. Here we demonstrate that polar in-plane surface interactions of a ferroelectric nematic NF produce polar monodomains in micron-thin planar cells and stripes of an alternating electric polarization, separated by 180° domain walls, in thicker slabs. The surface polarity binds together pairs of these walls, yielding a total polarization rotation by 360°. The polar contribution to the total surface anchoring strength is on the order of 10%. The domain walls involve splay, bend, and twist of the polarization. The structure suggests that the splay elastic constant is larger than the bend modulus. The 360° pairs resemble domain walls in cosmology models with biased vacuums and ferromagnets in an external magnetic field. © 2022, CC BY.

关键词： Nematic liquid crystals

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Efficient General Waveform Catching by a cavity at a Virtual Absorbing Exceptional Point

arXiv

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arXiv 2023年

作者： Farhi, Asaf Dai, Wei Kim, Seunghwi Alu, Andrea Stone, Douglas Department of Applied Physics Yale University New HavenCT06520 United States Photonics Initiative Advanced Science Research Center City University of New York New YorkNY10031 United States Physics Program Graduate Center City University of New York New YorkNY10016 United States Yale Quantum Institute Yale University New HavenCT06520 United States

State transfer and photon detection are fundamental processes that have direct implications in fields such as quantum computing and photonic circuits. However, while naturally emitted photons decay exponentially in time, to perfectly capture a photon its envelope should increase exponentially to match the time-reversed response of the absorbing cavity. Here we show that a cavity at a virtual absorbing exceptional point captures additional temporal orders of an incoming waveform, resulting in efficient passive state transfer and photon detection. This approach paves the way for state transfer at optical frequencies and efficient detection of a spontaneously emitted photon. Copyright © 2023, The Authors. All rights reserved.

关键词： Photons

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The Detection of H2O Maser Emission from mid-IR Red Galaxies

arXiv

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arXiv 2024年

作者： Kuo, C.Y. Tai, C.Y. Constantin, A. Braatz, J.A. Chung, H.H. Chen, B.Y. Pesce, D.W. Impellizzeri, C.M.V. Gao, F. Chang, Y.-Y. Physics Department National Sun Yat-Sen University No. 70 Lien-Hai Rd Kaosiung City80424 Taiwan Academia Sinica Institute of Astronomy and Astrophysics P.O. Box 23-141 Taipei10617 Taiwan Graduate Institute of Astronomy National Central University No. 300 Zhongda Rd. Zhongli Dist. Taoyuan City320317 Taiwan Department of Applied Physics Kaosiung University No. 700 Gaoxiongdaxue Rd. Nanzi Dist. Kaohsiung City811726 Taiwan Department of Physics and Astronomy James Madison University HarrisonburgVA22807 United States National Radio Astronomy Observatory 520 Edgemont Road CharlottesvilleVA22903 United States Black Hole Harvard University 20 Garden Street CambridgeMA02138 United States Harvard-Smithsonian Center for Astrophysics 60 Garden Street CambridgeMA02138 United States Leiden Observatory Leiden University PO Box 9513 Leiden2300 RA Netherlands Max Planck Institute for Radio Astronomy auf dem Hügel 69 Bonn53121 Germany Department of Physics National Chung Hsing University No. 145 Xingda Rd. South Dist. Taichung City402202 Taiwan

We report the detection of H2O maser emission in 4 out of 77 (5.2%) mid-IR red galaxies that meet the color criteria of W1−W2 > 0.5 and W1−W4 > 7 and are classified as Type-2 AGNs based on optical, near-IR, and mid-IR spectral energy distribution (SED) fitting. Here, W1, W2, and W4 represent the IR magnitudes at 3.4, 4.6, and 22 µm, respectively, as measured by the Wide-field Infrared Survey Explorer. Three of the four newly identified maser galaxies are classified as either Seyfert 2 or LINER systems, but none are disk maser systems. Our analysis indicates that AGN identifications based solely on SED fitting are unreliable, resulting in an unexpectedly low detection rate. By restricting our sample to optically classified Type 2 AGNs that satisfy the mid-IR color criteria, we achieve a maser detection rate of ∼13−18%, aligning with previous predictions for mid-IR red sources. These selection criteria are the most effective to date for facilitating new maser detections, particularly in light of the recent identification of additional Type 2 AGNs identified from ongoing galaxy and AGN surveys. © 2024, CC BY.

关键词： Infrared devices

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Uncovering the Ghostly Remains of an Extremely Diffuse Satellite in the Remote Halo of NGC 253

arXiv

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arXiv 2024年

作者： Okamoto, Sakurako Ferguson, Annette M.N. Arimoto, Nobuo Ogami, Itsuki Žemaitis, Rokas Chiba, Masashi Irwin, Mike J. Jang, In Sung Koda, Jin Komiyama, Yutaka Lee, Myung Gyoon Lee, Jeong Hwan Rich, Michael Tanaka, Masayuki Tanaka, Mikito Subaru Telescope National Astronomical Observatory of Japan 650 North A’ohoku Place HiloHI96720 United States National Astronomical Observatory of Japan Osawa 2-21-1 Mitaka Tokyo181-8588 Japan The Graduate University for Advanced Studies SOKENDAI Osawa 2-21-1 Mitaka Tokyo181-8588 Japan Institute for Astronomy University of Edinburgh Royal Observatory Blackford Hill EdinburghEH9 3HJ United Kingdom Astronomical Institute Tohoku University 6-3 Aoba Aramaki Aoba-ku Miyagi Sendai980-8578 Japan Institute of Astronomy University of Cambridge Madingley Road CambridgeCB3 0HA United Kingdom Department of Astronomy & Astrophysics University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States Department of Physics and Astronomy Stony Brook University Stony BrookNY11794-3800 United States Dept. of Advanced Sciences Faculty of Science and Engineering Hosei University 3-7-2 Kajino-cho Koganei-shi Tokyo184-8584 Japan Astronomy Program Department of Physics and Astronomy SNUARC Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of The Center for High Energy Physics Kyungpook National University 80 Daehakro Bukgu Daegu41566 Korea Republic of Department of Physics and Astronomy The University of California Los AngelesCA90095 United States

We present the discovery of NGC253-SNFC-dw1, a new satellite galaxy in the remote stellar halo of the Sculptor Group spiral, NGC 253. The system was revealed using deep resolved star photometry obtained as part of the Subaru Near-Field Cosmology Survey that uses the Hyper Suprime-Cam on the Subaru Telescope. Although rather luminous (MV = -11.7 ±0.2) and massive (M∗ ∼ 1.25 ×107 M☉), the system is one of the most diffuse satellites yet known, with a half-light radius of Rh = 3.37 ± 0.36 kpc and an average surface brightness of ∼ 30.1 mag arcmin-2 within the Rh. The colour-magnitude diagram shows a dominant old (∼ 10 Gyr) and metal-poor ([M/H] = -1.5±0.1 dex) stellar population, as well as several candidate thermally-pulsing asymptotic giant branch stars. The distribution of red giant branch stars is asymmetrical and displays two elongated tidal extensions pointing towards NGC 253, suggestive of a highly disrupted system being observed at apocenter. NGC253-SNFC-dw1 has a size comparable to that of the puzzling Local Group dwarfs Andromeda XIX and Antlia 2 but is two magnitudes brighter. While unambiguous evidence of tidal disruption in these systems has not yet been demonstrated, the morphology of NGC253-SNFC-dw1 clearly shows that this is a natural path to produce such diffuse and extended galaxies. The surprising discovery of this system in a previously well-searched region of the sky emphasizes the importance of surface brightness limiting depth in satellite searches. © 2024, CC BY.

关键词： Galaxies

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The influence of spin in black hole triplets

arXiv

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arXiv 2022年

作者： Chitan, Ariel Mylläri, Aleksandr Valtonen, Mauri Physics and Astronomy department University of Western Ontario 1151 Richmond Street LondonONN6A 3K7 Canada Graduate Program in Astrophysics Observatoire de Paris Universite PSL CNRS 5 pl. Jules Janssen Meudon92195 France Physics department University of the West Indies W.I Trinidad and Tobago Abo Akademi University Abo Turku Finland University of Turku Turku Finland Tuorla Observatory Department of Physics and Astronomy University of Turku Turku Finland Visitor Institute of Astronomy University of Cambridge Madingley Road Cambridge United Kingdom

Spin can influence the dynamics of the already chaotic black hole triplet system. We follow this problem in two sets of simulations: first, the Agekian-Anosova region (or region D), and second, using Pythagorean triangles. We use ARCcode, an N-body code that performs numerical integration of orbits. This code includes post-Newtonian corrections, which we include up to the 2.5th order. In set one of our simulations, we fix the masses of the black holes at 106 M☉. Then we run the simulations first without any spin added and after by initialising spin on one of the black holes. We find that after including spin into the system, 12.9% of the simulations changed outcomes. Either the systems went from having all black holes merging to having a black hole escaping the system, or vice versa. In the second set of simulations, we expanded into Pythagorean triangles as initial positions of black holes, stemming from Burrau’s three-body problem. We varied the masses of the black holes from 100 M☉ - 1012 M☉. Black holes in these systems were given spin in normalised units ranging from 0 to ∼ 0.95. We find that intermediate mass black holes in the range of 104 M☉-105 M☉, were influenced the most by spin, particularly in their lifetimes. We also find that simulations, initialised as 2D, become 3D. © 2022, CC BY.

关键词： Black holes

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Nontrivial coupling of light into a defect:the interplay of nonlinearity and topology

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Light(Science & Applications) 2020年第1期9卷 646-655页

作者： Shiqi Xia Dario Jukic Nan Wang Daria Smirnova Lev Smirnov Liqin Tang Daohong Song Alexander Szameit Daniel Leykam Jingjun Xu Zhigang Chen Hrvoje Buljan The MOE Key Laboratory of Weak-Light Nonlinear Photonics TEDA Applied Physics Institute and School of PhysicsNankai UniversityTianjin 300457China Faculty of Civil Engineering University of ZagrebA.Kacica Miosica 2610000 ZagrebCroatia Nonlinear Physics Centre Research School of PhysicsAustralian National UniversityCanberraACT 2601Australia Institute of Applied Physics Russian Academy of ScienceNizhny Novgorod 603950Russia Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006 ShanxiPR China Institut für Physik Universitat RostockAlbert-Einstein-Strasse 2318059 RostockGermany Center for Theoretical Physics of Complex Systems Institute for Basic Science(IBS)Daejeon 34126Republic of Korea Basic Science Program Korea University of Science and TechnologyDaejeon 34113Republic of Korea Department of Physics and Astronomy San Francisco State UniversitySan FranciscoCA 94132USA Department of Physics Faculty of ScienceUniversity of ZagrebBijenička c.3210000 ZagrebCroatia

The flourishing of topological photonics in the last decade was achieved mainly due to developments in linear topological photonic ***,when nonlinearity is introduced,many intriguing questions *** example,are there universal fingerprints of the underlying topology when modes are coupled by nonlinearity,and what can happen to topological invariants during nonlinear propagation?To explore these questions,we experimentally demonstrate nonlinearity-induced coupling of light into topologically protected edge states using a photonic platform and develop a general theoretical framework for interpreting the mode-coupling dynamics in nonlinear topological *** on laser-written photonic Su-Schrieffer-Heeger lattices,our experiments show the nonlinear coupling of light into a nontrivial edge or interface defect channel that is otherwise not permissible due to topological *** theory explains all the observations ***,we introduce the concepts of inherited and emergent nonlinear topological phenomena as well as a protocol capable of revealing the interplay of nonlinearity and *** concepts are applicable to other nonlinear topological systems,both in higher dimensions and beyond our photonic platform.

关键词： nonlinearity topological coupling

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Bloch-Grüneisen temperature and universal scaling of normalized resistivity in doped graphene revisited

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Physical Review B 2021年第4期103卷 045425-045425页

作者： Khoe Van Nguyen Yia-Chung Chang Research Center for Applied Sciences Academia Sinica Taipei 115 Taiwan Molecular Science and Technology Taiwan International Graduate Program Academia Sinica Taipei 115 Taiwan Department of Physics National Central University Chungli 320 Taiwan Department of Physics National Cheng-Kung University Tainan 701 Taiwan

We resolved some controversial issues on the Bloch-Grüneisen (BG) temperature in doped graphene via analytical and numerical calculations based on full inelastic electron-acoustic-phonon (EAP) scattering rate and various approximation schemes. Analytic results for BG temperature obtained by semi-inelastic (SI) approximation (which gives scattering rates in excellent agreement with the full inelastic scattering rates) are compared with those obtained by quasielastic (QE) approximation and the commonly adopted value of ΘFLA=2ℏvLAkF/kB. It is found that the commonly adopted BG temperature in graphene (ΘFLA) is about 5 times larger than the value obtained by the QE approximation and about 2.5 times larger than that by the SI approximation, when using the crossing-point temperature where low-temperature and high-temperature limits of the resistivity (ρ) meet. The corrected analytic relation based on SI approximation agrees extremely well with the transition temperatures determined by fitting the low- and high-T behavior of available experimental data of graphene's resistivity. Using the analytic expression of ΘBG we can prove that the normalized resistivity defined as R=ρ(T)/ρ(ΘBG) plotted as a function of (T/ΘBG) is independent of the carrier density. We also introduced a way to determine the BG temperature including the full inelastic EAP scattering rate when the deviation of electron energy from the chemical potential is taken into account by finding the maximum of ∂ρ/∂T.

关键词： Electrical conductivity Graphene Scaling methods

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