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Astronomy & Astrophysics
P. Agnes, I. F. M. Albuquerque, T. Alexander, A. K. Alton., M. Ave, H. O. Back, G. Batignani, K. Biery, V. Bocci, W. M. Bonivento, B. Bottino, S. Bussino, M. Cadeddu, M. Cadoni, F. Calaprice, A. Caminata, N. Canci, M. Caravati, N. Cargioli, M. Cariello, M. Carlini, V. Cataudella, P. Cavalcante, S. Cavuoti, S. Chashin, A. Chepurnov, C. Cicalo, G. Covone, D. D'Angelo, S. Davini, A. De Candia, S. De Cecco, G. De Filippis, G. De Rosa, A. V. Derbin, A. Devoto, M. D'Incecco, C. Dionisi, F. Dordei, M. Downing, D. D'Urso, G. Fiorillo, D. Franco, F. Gabriele, C. Galbiati, C. Ghiano, C. Giganti, G. K. Giovanetti, A. M. Goretti, G. Grilli di Cortona, A. Grobov, M. Gromov, M. Guan, M. Gulino, B. R. Hackett, K. Herner, T. Hessel, B. Hosseini, F. Hubaut, E. V. Hungerford, An. Ianni, V. Ippolito, K. Keeter, C. L. Kendziora, M. Kimura, I. Kochanek, D. Korablev, G. Korga, A. Kubankin, M. Kuss, M. La Commara, M. Lai, X. Li, M. Lissia, G. Longo, O. Lychagina, I. N. Machulin, L. P. Mapelli, S. M. Mari, J. Maricic, A. Messina, R. Milincic, J. Monroe, M. Morrocchi, X. Mougeot, V. N. Muratova, P. Musico, A. O. Nozdrina, A. Oleinik, F. Ortica, L. Pagani, M. Pallavicini, L. Pandola, E. Pantic, E. Paoloni, K. Pelczar, N. Pelliccia, S. Piacentini, A. Pocar, D. M. Poehlmann, S. Pordes, S. S. Poudel, P. Pralavorio, D. D. Price, F. Ragusa, M. Razeti, A. Razeto, A. L. Renshaw, M. Rescigno, J. Rode, A. Romani, D. Sablone, O. Samoylov, W. Sands, S. Sanfilippo, E. Sandford, C. Savarese, B. Schlitzer
Summary: In this study, the DarkSide-50 experiment at Laboratori Nazionali del Gran Sasso analyzed the complete dataset acquired with a low-radioactivity argon target to search for weakly interacting massive particles (WIMPs) in the mass range below 10 GeV/c². The new analysis improved the calibration of the detector response, background model, and determination of systematic uncertainties, allowing for a more accurate modeling of background rate and spectra down to 0.06 keVr. By setting a 90% C.L. exclusion limit for the spin-independent cross section of WIMPs with a mass of 3 GeV/c² on nucleons at 6 x 10-43 cm², this study extends the exclusion region for spin-independent dark matter interactions below the current experimental constraints in the [1.2, 3.6] GeV/c² WIMP mass range.
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Astronomy & Astrophysics
Debajit Bose, Tarak Nath Maity, Tirtha Sankar Ray
Summary: By measuring the solar gamma ray flux, we have set stronger limits on the scattering cross section between dark matter and electrons, with these limits ranging from GeV to PeV scale for dark matter masses, which are four to six orders of magnitude stronger than existing limits.
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Physics, Nuclear
Yu Liu, Lei Zhang, Yulu Yan, Shin-Ted Lin, Shukui Liu, Jinjun Zhu, Changjian Tang, Haoyang Xing
Summary: Phonon detectors have become a prevalent technology for detecting low-mass dark matter in recent years due to their low thresholds and high resolution. This study proposes a phonon detector utilizing solid argon as the absorber, which combines the advantages of different detector types. However, experimental investigations of the performance of solid argon phonon detectors are currently limited by technical constraints.
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Instruments & Instrumentation
K. Dona, J. Liu, N. Kurinsky, D. Miller, P. Barry, C. Chang, A. Sonnenschein
Summary: This paper presents the design and initial performance measurements of a tabletop Fourier transform spectrometer (FTS) for terahertz spectral analysis using infrared optics in a Michelson arrangement. The device is coupled to a broadband pyroelectric photodetector and is capable of measuring spectra of narrowband and broadband input radiation above 10 THz.
JOURNAL OF INSTRUMENTATION
(2022)
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Astronomy & Astrophysics
Cosmin Ilie, Jillian Paulin
Summary: This paper investigates the impact of stellar velocity on the capture rates of dark matter and develops an analytical expression to describe the suppression effect. The results show that considering the possible orbital velocities of central stars has negligible effects on the previous results, using Population III stars as dark matter probes.
ASTROPHYSICAL JOURNAL
(2022)
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Instruments & Instrumentation
A. C. Ezeribe, C. Eldridge, W. Lynch, R. R. Marcelo Gregorio, A. Scarff, N. J. C. Spooner
Summary: The sensitivities of current directional dark matter search detectors are limited by target mass. A novel ThGEM-Multiwire hybrid charge readout technology has been demonstrated, showing a good performance in SF6 target gas. This hybrid detector achieves an effective gas gain of 2470 +/- 160 in 20 Torr of pure SF6 target gas.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
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Instruments & Instrumentation
J. Mitchell, T. Kovachy, S. Hahn, P. Adamson, S. Chattopadhyay
Summary: We investigate and analyze site specific systematics for the MAGIS-100 atomic interferometry experiment at Fermi National Accelerator Laboratory. We find that passive and active mitigation for noise sources must be implemented as the atom interferometers move out of the laboratory environment. The study measures ambient temperature, humidity, and vibrations of the installation site to inform the research and development of the experiment design.
JOURNAL OF INSTRUMENTATION
(2022)
Review
Astronomy & Astrophysics
Jianglai Liu
Summary: Dark matter, an invisible substance comprising a large portion of the universe, is still a mystery in physics and astronomy. This talk presents the initial findings of PandaX-4T, a 4-ton liquid xenon dark matter observatory, and discusses its performance, data analysis details, and the latest results on dark matter-nucleon interactions.
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
(2022)
Article
Instruments & Instrumentation
D. Unger, A. Abeln, C. Enss, A. Fleischmann, D. Hengstler, S. Kempf, L. Gastaldo
Summary: This study presents a detector system based on low temperature metallic magnetic calorimeters (MMCs) developed for IAXO, showing promising potential to discover and study axion-like particles (ALPs) with good energy resolution and low energy threshold. The background rate for the unshielded detector system is determined to be 3.2(1) x 10(-4) keV(-1) cm(-2) s(-1) in the energy range of 1 keV to 10 keV, with future shields expected to reduce background induced by cosmic muons and natural radioactivity.
JOURNAL OF INSTRUMENTATION
(2021)
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Instruments & Instrumentation
Zhou Wang, Wenbo Ma, Tao Zhang, Li Zhao, Shuaijie Li, Xiangyi Cui, Jianglai Liu, Changbo Fu, Yonglin Ju, Qing Lin, Xiaohua Chen, Xiuli Wang
Summary: A high-speed ultra-high purity xenon recuperation system is designed and developed for the PandaX-4T dark matter detector. The system includes a pump, heat management system, and various pipelines to ensure the safety and purity of the recuperated xenon gas. This is important for the operation of large-scale dark matter detectors with strict temperature and pressure requirements and low background.
JOURNAL OF INSTRUMENTATION
(2022)
Article
Instruments & Instrumentation
Xiuli Wang, Zhuoqun Lei, Yonglin Ju, Jianglai Liu, Ning Zhou, Yu Chen, Zhou Wang, Xiangyi Cui, Yue Meng, Li Zhao
Summary: This paper describes an innovative xenon handling system for safe and efficient processing of liquid xenon, including storage and transfer without losses or contamination. The system consists of specially designed double-walled cylindrical vessels and operates at temperatures ranging from 165-300K with a maximum working pressure of 7.1MPa.
JOURNAL OF INSTRUMENTATION
(2023)
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Instruments & Instrumentation
S. Pereverzev
Summary: With the expansion of applications for noble elements detectors, understanding the effects of impurities has become increasingly important. In this paper, several examples are presented of energetic, long-living molecules that can be produced in detectors through ionizing radiation and UV light.
JOURNAL OF INSTRUMENTATION
(2022)
Article
Instruments & Instrumentation
C. He, J. Liu, X. Ren, X. Shang, X. Wei, M. Wang, J. Yang, Y. Yang, G. Zhang, Q. Zheng
Summary: This paper presents a waveform digitizer for PandaX dark matter experiments, with support for both external-trigger and triggerless readouts. It features an 8-channel VME board with a sampling rate of 500 MS/s and 14-bit resolution per channel. The digitizer system, consisting of 72 channels, has been successfully tested in situ for the PandaX-4T experiment.
JOURNAL OF INSTRUMENTATION
(2021)
Article
Instruments & Instrumentation
X. Cui, Z. Wang, Y. Ju, X. Wang, H. Liu, W. Ma, J. Liu, L. Zhao, X. Ji, S. Li, R. Yan, H. Sha, P. Huang, J. Zhou, C. Shang, L. Liu
Summary: An online cryogenic distillation system was designed for PandaX-4T to remove krypton and radon from xenon with high efficiency. The system was successfully commissioned and tested to achieve effective removal of krypton and radon in xenon under respective working conditions.
JOURNAL OF INSTRUMENTATION
(2021)
Article
Instruments & Instrumentation
L. Balogh, C. Beaufort, A. Brossard, J. -f. Caron, M. Chapellier, J. -m. Coquillat, E. C. Corcoran, S. Crawford, A. Dastgheibi-Fard, Y. Deng, K. Dering, D. Durnford, C. Garrah, G. Gerbier, I. Giomataris, G. Giroux, P. Gorel, M. Gros, P. Gros, O. Guillaudin, E. W. Hoppe, I. Katsioulas, F. Kelly, P. Knights, S. Langrock, P. Lautridou, I. Manthos, R. D. Martin, J. Matthews, J. -p. Mols, J. F. Muraz, T. Neep, K. Nikolopoulos, P. O'Brien, M. C. Piro, N. Rowe, D. Santos, P. Samuleev, G. Savvidis, I. Savvidis, F. Vazquez de Sola Fernandez, M. Vidal, R. Ward, M. Zampaolo
Summary: The NEWS-G collaboration aims to detect Weakly Interacting Massive Particles (WIMPs) with sub-GeV/c(2) using Spherical Proportional Counters (SPCs). SPCs are gaseous detectors that rely on ionization with a single ionization electron energy threshold. The latest generation of SPCs for direct dark matter searches has been installed at SNOLAB in Canada in 2021. This article provides a detailed description of the fabrication process of the NEWS-G experiment, along with strategies to mitigate detector backgrounds, measurements of component radioactivity, and estimations of induced background event rates.
JOURNAL OF INSTRUMENTATION
(2023)
Article
Physics, Particles & Fields
Spencer Chang, Jamison Galloway, Markus A. Luty, Ennio Salvioni, Yuhsin Tsai
JOURNAL OF HIGH ENERGY PHYSICS
(2015)
Article
Astronomy & Astrophysics
Spencer Chang, Yu Gao, Michael Spannowsky
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2012)
Article
Physics, Nuclear
Daniele Alves, Nima Arkani-Hamed, Sanjay Arora, Yang Bai, Matthew Baumgart, Joshua Berger, Matthew Buckley, Bart Butler, Spencer Chang, Hsin-Chia Cheng, Clifford Cheung, R. Sekhar Chivukula, Won Sang Cho, Randy Cotta, Mariarosaria D'Alfonso, Sonia El Hedri, Rouven Essig, Jared A. Evans, Liam Fitzpatrick, Patrick Fox, Roberto Franceschini, Ayres Freitas, James S. Gainer, Yuri Gershtein, Richard Gray, Thomas Gregoire, Ben Gripaios, Jack Gunion, Tao Han, Andy Haas, Per Hansson, JoAnne Hewett, Dmitry Hits, Jay Hubisz, Eder Izaguirre, Jared Kaplan, Emanuel Katz, Can Kilic, Hyung-Do Kim, Ryuichiro Kitano, Sue Ann Koay, Pyungwon Ko, David Krohn, Eric Kuflik, Ian Lewis, Mariangela Lisanti, Tao Liu, Zhen Liu, Ran Lu, Markus Luty, Patrick Meade, David Morrissey, Stephen Mrenna, Mihoko Nojiri, Takemichi Okui, Sanjay Padhi, Michele Papucci, Michael Park, Myeonghun Park, Maxim Perelstein, Michael Peskin, Daniel Phalen, Keith Rehermann, Vikram Rentala, Tuhin Roy, Joshua T. Ruderman, Veronica Sanz, Martin Schmaltz, Stephen Schnetzer, Philip Schuster, Pedro Schwaller, Matthew D. Schwartz, Ariel Schwartzman, Jing Shao, Jessie Shelton, David Shih, Jing Shu, Daniel Silverstein, Elizabeth Simmons, Sunil Somalwar, Michael Spannowsky, Christian Spethmann, Matthew Strassler, Shufang Su, Tim Tait, Brooks Thomas, Scott Thomas, Natalia Toro, Tomer Volansky, Jay Wacker, Wolfgang Waltenberger, Itay Yavin, Felix Yu, Yue Zhao, Kathryn Zurek
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2012)
Article
Astronomy & Astrophysics
Spencer Chang, Josef Pradler, Itay Yavin
Article
Astronomy & Astrophysics
G. Barello, Spencer Chang, Christopher A. Newby
Article
Astronomy & Astrophysics
Spencer Chang, Ralph Edezhath, Jeffrey Hutchinson, Markus Luty
Article
Physics, Particles & Fields
Spencer Chang, Arjun Menon
JOURNAL OF HIGH ENERGY PHYSICS
(2013)
Article
Physics, Particles & Fields
Spencer Chang, Markus A. Luty
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Particles & Fields
Fayez Abu-Ajamieh, Spencer Chang, Miranda Chen, Markus A. Luty
Summary: The primary goal is to measure the Higgs couplings to SM particles, with any observed deviations pointing to new physics that can be explored at future colliders. The approach is model-independent, assuming no light degrees of freedom below the scale of new physics and allowing arbitrary values for the couplings. If the scale of new physics is above the TeV scale, the deviations can be described by the leading higher-dimension gauge invariant operator in the SM effective field theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Spencer Chang, Ting-Kuo Chen, Cheng-Wei Chiang
Summary: This study investigates a neural-network-based hypothesis test to distinguish different W' and charged scalar resonances in hadron colliders. A multiclass classifier based on a fully connected neural network trained upon two-dimensional histograms of kinematic variables is found to be the most powerful approach. The neural network scheme presented in this paper is a powerful tool for probing the properties of charged resonances and can outperform traditional methods such as Bayesian hypothesis testing.
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Astronomy & Astrophysics
Spencer Chang, Timothy Cohen, Bryan Ostdiek
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Astronomy & Astrophysics
G. Barello, Spencer Chang, Christopher A. Newby, Bryan Ostdiek
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Astronomy & Astrophysics
G. Barello, Spencer Chang, Christopher A. Newby
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Astronomy & Astrophysics
Spencer Chang