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1. A New Approach for Measuring the Muon Anomalous Magnetic Moment and Electric Dipole Moment [2019]

  • Abe, M., Bae, S., Beer, G., Bunce, G., Choi, H., Choi, S., Chung, M., da Silva, W., Eidelman, S., Finger, M., Fukao, Y., Fukuyama, T., Haciomeroglu, S., Hasegawa, K., Hayasaka, K., Hayashizaki, N., Hisamatsu, H., Iijima, T., Iinuma, H., Inami, K., Ikeda, H., Ikeno, M., Ishida, K., Itahashi, T., Iwasaki, M., Iwashita, Y., Iwata, Y., Kadono, R., Kamal, S., Kamitani, T., Kanda, S., Kapusta, F., Kawagoe, K., Kawamura, N., Kitamura, R., Kim, B., Kim, Y., Kishishita, T., Ko, H., Kohriki, T., Kondo, Y., Kume, T., Lee, M. J., Lee, S., Lee, W., Marshall, G. M., Matsuda, Y., Mibe, T., Miyake, Y., Murakami, T., Nagamine, K., Nakayama, H., Nishimura, S., Nomura, D., Ogitsu, T., Ohsawa, S., Oide, K., Oishi, Y., Okada, S., Olin, A., Omarov, Z., Otani, M., Razuvaev, G., Rehman, A., Saito, N., Saito, N. F., Sasaki, K., Sasaki, O., Sato, N., Sato, Y., Semertzidis, Y. K., Sendai, H., Shatunov, Y., Shimomura, K., Shoji, M., Shwartz, B., Strasser, P., Sue, Y., Suehara, T., Sung, C., Suzuki, K., Takatomi, T., Tanaka, M., Tojo, J., Tsutsumi, Y., Uchida, T., Ueno, K., Wada, S., Won, E., Yamaguchi, H., Yamanaka, T., Yamamoto, A., Yamazaki, T., Yasuda, H., Yoshida, M., and Yoshioka, T.
Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, and Physics - Accelerator Physics
Abstract
This paper introduces a new approach to measure the muon magnetic moment anomaly $a_{\mu} = (g-2)/2$, and the muon electric dipole moment (EDM) $d_{\mu}$ at the J-PARC muon facility. The goal of our experiment is to measure $a_{\mu}$ and $d_{\mu}$ using an independent method with a factor of 10 lower muon momentum, and a factor of 20 smaller diameter storage-ring solenoid compared with previous and ongoing muon $g-2$ experiments with unprecedented quality of the storage magnetic field. Additional significant differences from the present experimental method include a factor of 1,000 smaller transverse emittance of the muon beam (reaccelerated thermal muon beam), its efficient vertical injection into the solenoid, and tracking each decay positron from muon decay to obtain its momentum vector. The precision goal for $a_{\mu}$ is statistical uncertainty of 450 part per billion (ppb), similar to the present experimental uncertainty, and a systematic uncertainty less than 70 ppb. The goal for EDM is a sensitivity of $1.5\times 10^{-21}~e\cdot\mbox{cm}$.
Comment: 24 pages, 14 figures

2. Printed Organic Transistor-based Biosensors for Non-invasive Sweat Analysis [2020]

  • Nagamine, K., Nomura, A., Ichimura, Y., Izawa, R., Sasaki, S., Furusawa, H., Matsui, H., and Tokito, S.
  • Analytical sciences. 36(3):291-302

3. Verification of improvement effects with lotus-root extracts in eye- and nose-related allergic conditions —Randomized, placebo-controlled, double-blind, parallel-group study— [2020]

  • Nagamine, K.
  • Yakuri to chiryo. 48(9):1559-1570

4. Comparison of S-type/I-type (Australia) and Ilmenite-series/Magnetite-series (Japan) in terms of gas features occluded in granitoids [2020]

  • Nagamine, K. and Araki, M.
  • Geochemical journal. 54(4):159-164

5. Frontiers in Geochemistry: Tribute to Professor Ryuichi Sugisaki [2020]

  • Mimura, K., Mori, Y., Tanaka, T., Nagamine, K., Yamamoto, K., and Sugitani, K.
  • Geochemical journal. 54(4):147-158

6. Galaxy evolution studies with the SPace IR telescope for Cosmology and Astrophysics (SPICA): the power of IR spectroscopy [2017]

  • Spinoglio, L., Alonso-Herrero, A., Armus, L., Baes, M., Bernard-Salas, J., Bianchi, S., Bocchio, M., Bolatto, A., Bradford, C. M., Braine, J., Carrera, F. J., Ciesla, L., Clements, D. L., Dannerbauer, H., Doi, Y., Efstathiou, A., Egami, E., Fernandez-Ontiveros, J. A., Ferrara, A., Fischer, J., Franceschini, A., Gallerani, S., Giard, M., Gonzalez-Alfonso, E., Gruppioni, C., Guillard, P., Hatziminaoglou, E., Imanishi, M., Ishihara, D., Isobe, N., Kaneda, H., Kawada, M., Kohno, K., Kwon, J., Madden, S., Malkan, M. A., Marassi, S., Matsuhara, H., Matsuura, M., Miniutti, G., Nagamine, K., Nagao, T., Najarro, F., Nakagawa, T., Onaka, T., Oyabu, S., Pallottini, A., Piro, L., Pozzi, F., Rodighiero, G., Roelfsema, P., Sakon, I., Santini, P., Schaerer, D., Schneider, R., Scott, D., Serjeant, S., Shibai, H., Smith, J. -D. T., Sobacchi, E., Sturm, E., Suzuki, T., Vallini, L., van der Tak, F., Vignali, C., Yamada, T., Wada, T., and Wang, L.
Subjects
Astrophysics - Astrophysics of Galaxies
Abstract
IR spectroscopy in the range 12-230 micron with the SPace IR telescope for Cosmology and Astrophysics (SPICA) will reveal the physical processes that govern the formation and evolution of galaxies and black holes through cosmic time, bridging the gap between the James Webb Space Telescope (JWST) and the new generation of Extremely Large Telescopes (ELTs) at shorter wavelengths and the Atacama Large Millimeter Array (ALMA) at longer wavelengths. SPICA, with its 2.5-m telescope actively-cooled to below 8K, will obtain the first spectroscopic determination, in the mid-IR rest-frame, of both the star-formation rate and black hole accretion rate histories of galaxies, reaching lookback times of 12 Gyr, for large statistically significant samples. Densities, temperatures, radiation fields and gas-phase metallicities will be measured in dust-obscured galaxies and active galactic nuclei (AGN), sampling a large range in mass and luminosity, from faint local dwarf galaxies to luminous quasars in the distant Universe. AGN and starburst feedback and feeding mechanisms in distant galaxies will be uncovered through detailed measurements of molecular and atomic line profiles. SPICA's large-area deep spectrophotometric surveys will provide mid-IR spectra and continuum fluxes for unbiased samples of tens of thousands of galaxies, out to redshifts of z~6. Furthermore, SPICA spectroscopy will uncover the most luminous galaxies in the first few hundred million years of the Universe, through their characteristic dust and molecular hydrogen features.
Comment: Paper accepted for publication on PASA on 21st September 2017, as part of the SPICA Special Issue

7. Repolarization of Negative Muons by Polarized $^{209}$Bi Nuclei [2016]

  • Kadono, R., Imazato, J., Ishikawa, T., Nishiyama, K., Nagamine, K., Yamazaki, T., Bosshard, A., Döbeli, M., van Elmbt, L., Schaad, M., Truöl, P., Bay, A., Perroud, J. P., Deutsch, J., Tasiaux, B., and Hagn, E.
  • Phys. Rev. Lett. 57, 1847 (1986)
Subjects
Nuclear Experiment
Abstract
A large $\mu^-$ polarization was achieved in muonic Bi atoms with the help of the strong hyperfine field in a polarized nuclear target. Using $^{209}$Bi nuclei polarized to ($59\pm9$)% in ferromagnetic BiMn, we observed a $\mu$-$e$ decay asymmetry of ($13.1\pm3.9$)%, which gives $\mu^-$ polarization per nuclear polarization equal to $-1.07\pm 0.35$. This value is almost consistent with $-0.792$ calculated for nuclei with spin $I= \frac{9}{2}$ and a positive magnetic moment under the assumption that the hyperfine interaction becomes effective in the lowest muonic states.
Comment: Corrected version of original paper, 4 pages, 2 figures, corrections indicated by red

8. Galaxy Evolution Studies with the &ITSPace IR Telescope for Cosmology and Astrophysics&IT (&ITSPICA&IT): The Power of IR Spectroscopy [2017]

  • Spinoglio, L, Alonso-Herrero, A, Armus, L, Baes, M, Bernard-Salas, J, Bianchi, S, Bocchio, M, Bolatto, A, Bradford, C, Braine, J, Carrera, FJ, Ciesla, L, Clements, DL, Dannerbauer, H, Doi, Y, Efstathiou, A, Egami, E, Fernandez-Ontiveros, JA, Ferrara, A, Fischer, J, Franceschini, A, Gallerani, S, Giard, M, Gonzalez-Alfonso, E, Gruppioni, C, Guillard, P, Hatziminaoglou, E, Imanishi, M, Ishihara, D, Isobe, N, Kaneda, H, Kawada, M, Kohno, K, Kwon, J, Madden, S, Malkan, MA, Marassi, S, Matsuhara, H, Matsuura, M, Miniutti, G, Nagamine, K, Nagao, T, Najarro, F, Nakagawa, T, Onaka, T, Oyabu, S, Pallottini, A, Piro, L, Pozzi, F, Rodighiero, G, Roelfsema, P, Sakon, I, Santini, P, Schaerer, D, Schneider, R, Scott, D, Serjeant, S, Shibai, H, Smith, J-DT, Sobacchi, E, Sturm, E, Suzuki, T, Vallini, L, van der Tak, F, Vignali, C, Yamada, T, Wada, T, and Wang, L
  • PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA, vol 34
Subjects
galaxies: active, galaxies: evolution, galaxies: starburst, infrared: galaxies, techniques: spectroscopic telescopes, astro-ph.GA, Astronomy & Astrophysics, Astronomical and Space Sciences, and Other Physical Sciences
Abstract
AbstractIR spectroscopy in the range 12–230 μm with the SPace IR telescope for Cosmology and Astrophysics (SPICA) will reveal the physical processes governing the formation and evolution of galaxies and black holes through cosmic time, bridging the gap between the James Webb Space Telescope and the upcoming Extremely Large Telescopes at shorter wavelengths and the Atacama Large Millimeter Array at longer wavelengths. The SPICA, with its 2.5-m telescope actively cooled to below 8 K, will obtain the first spectroscopic determination, in the mid-IR rest-frame, of both the star-formation rate and black hole accretion rate histories of galaxies, reaching lookback times of 12 Gyr, for large statistically significant samples. Densities, temperatures, radiation fields, and gas-phase metallicities will be measured in dust-obscured galaxies and active galactic nuclei, sampling a large range in mass and luminosity, from faint local dwarf galaxies to luminous quasars in the distant Universe. Active galactic nuclei and starburst feedback and feeding mechanisms in distant galaxies will be uncovered through detailed measurements of molecular and atomic line profiles. The SPICA’s large-area deep spectrophotometric surveys will provide mid-IR spectra and continuum fluxes for unbiased samples of tens of thousands of galaxies, out to redshifts of z ~ 6.

9. THE AGORA HIGH-RESOLUTION GALAXY SIMULATIONS COMPARISON PROJECT. II. ISOLATED DISK TEST [2016]

  • Kim, JH, Agertz, O, Teyssier, R, Butler, MJ, Ceverino, D, Choi, JH, Feldmann, R, Keller, BW, Lupi, A, Quinn, T, Revaz, Y, Wallace, S, Gnedin, NY, Leitner, SN, Shen, S, Smith, BD, Thompson, R, Turk, MJ, Abel, T, Arraki, KS, Benincasa, SM, Chakrabarti, S, Degraf, C, Dekel, A, Goldbaum, NJ, Hopkins, PF, Hummels, CB, Klypin, A, Li, H, Madau, P, Mandelker, N, Mayer, L, Nagamine, K, Nickerson, S, O'Shea, BW, Primack, JR, Roca-Fàbrega, S, Semenov, V, Shimizu, I, Simpson, CM, Todoroki, K, Wadsley, JW, and Wise, JH
  • Astrophysical Journal, vol 833, iss 2
Subjects
cosmology: theory, galaxies: evolution, galaxies: formation, galaxies: kinematics and dynamics, ISM: structure, methods: numerical, astro-ph.GA, astro-ph.CO, Astronomy & Astrophysics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry, Atomic, Molecular, Nuclear, Particle and Plasma Physics, and Physical Chemistry (incl. Structural)
Abstract
© 2016. The American Astronomical Society. All rights reserved. Using an isolated Milky Way-mass galaxy simulation, we compare results from nine state-of-the-art gravito-hydrodynamics codes widely used in the numerical community. We utilize the infrastructure we have built for the AGORA High-resolution Galaxy Simulations Comparison Project. This includes the common disk initial conditions, common physics models (e.g., radiative cooling and UV background by the standardized package Grackle) and common analysis toolkit yt, all of which are publicly available. Subgrid physics models such as Jeans pressure floor, star formation, supernova feedback energy, and metal production are carefully constrained across code platforms. With numerical accuracy that resolves the disk scale height, we find that the codes overall agree well with one another in many dimensions including: gas and stellar surface densities, rotation curves, velocity dispersions, density and temperature distribution functions, disk vertical heights, stellar clumps, star formation rates, and Kennicutt-Schmidt relations. Quantities such as velocity dispersions are very robust (agreement within a few tens of percent at all radii) while measures like newly formed stellar clump mass functions show more significant variation (difference by up to a factor of ∼3). Systematic differences exist, for example, between mesh-based and particle-based codes in the low-density region, and between more diffusive and less diffusive schemes in the high-density tail of the density distribution. Yet intrinsic code differences are generally small compared to the variations in numerical implementations of the common subgrid physics such as supernova feedback. Our experiment reassures that, if adequately designed in accordance with our proposed common parameters, results of a modern high-resolution galaxy formation simulation are more sensitive to input physics than to intrinsic differences in numerical schemes.

10. Hydrogel-supported skeletal muscle cell-based bioassay system [2011]

  • Nagamine, K., Otani, S., Takeda, M., Kanzaki, M., and Nishizawa, M.
  • 2011 International Symposium on Micro-NanoMechatronics and Human Science Micro-NanoMechatronics and Human Science (MHS), 2011 International Symposium on. :180-185 Nov, 2011

11. A new approach for measuring the muon anomalous magnetic moment and electric dipole moment [2019]

  • Abe, M., Bae, S., Beer, G., Bunce, G., Choi, H., Choi, S., Chung, M., da Silva, W., Eidelman, S., Finger, M., Fukao, Y., Fukuyama, T., Haciomeroglu, S., Hasegawa, K., Hayasaka, K., Hayashizaki, N., Hisamatsu, H., Iijima, T., Iinuma, H., Ikeda, H., Ikeno, M., Inami, K., Ishida, K., Itahashi, T., Iwasaki, M., Iwashita, Y., Iwata, Y., Kadono, R., Kamal, S., Kamitani, T., Kanda, S., Kapusta, F., Kawagoe, K., Kawamura, N., Kim, B., Kim, Y., Kishishita, T., Kitamura, R., Ko, H., Kohriki, T., Kondo, Y., Kume, T., Lee, M.J., Lee, S., Lee, W., Marshall, G.M., Matsuda, Y., Mibe, T., Miyake, Y., Murakami, T., Nagamine, K., Nakayama, H., Nishimura, S., Nomura, D., Ogitsu, T., Ohsawa, S., Oide, K., Oishi, Y., Okada, S., Olin, A., Omarov, Z., Otani, M., Razuvaev, G., Rehman, A., Saito, N., Saito, N.F., Sasaki, K., Sasaki, O., Sato, N., Sato, Y., Semertzidis, Y.K., Sendai, H., Shatunov, Y., Shimomura, K., Shoji, M., Shwartz, B., Strasser, P., Sue, Y., Suehara, T., Sung, C., Suzuki, K., Takatomi, T., Tanaka, M., Tojo, J., Tsutsumi, Y., Uchida, T., Ueno, K., Wada, S., Won, E., Yamaguchi, H., Yamanaka, T., Yamamoto, A., Yamazaki, T., Yasuda, H., Yoshida, M., and Yoshioka, T.
  • Progress of Theoretical and Experimental Physics. May, 2019, Vol. 2019 Issue 5, p1D, 22 p.
Subjects
Magnetic fields -- Methods, Magnetic fields -- Comparative analysis, Magnetic fields -- Measurement, and United States. Brookhaven National Laboratory
Abstract
This paper introduces a new approach to measure the muon magnetic moment anomaly [a.sub.[mu]] = (g - 2)/2 and the muon electric dipole moment (EDM) [d.sub.[mu]] at the J-PARC muon facility. The goal of our experiment is to measure [a.sub.[mu]] and [d.sub.[mu]] using an independent method with a factor of 10 lower muon momentum, and a factor of 20 smaller diameter storage-ring solenoid compared with previous and ongoing muon g - 2 experiments with unprecedented quality of the storage magnetic field. Additional significant differences from the present experimental method include a factor of 1000 smaller transverse emittance of the muon beam (reaccelerated thermal muon beam), its efficient vertical injection into the solenoid, and tracking each decay positron from muon decay to obtain its momentum vector. The precision goal for [a.sub.[mu]] is a statistical uncertainty of 450 parts per billion (ppb), similar to the present experimental uncertainty, and a systematic uncertainty less than 70 ppb. The goal for EDM is a sensitivity of 1.5 x [10.sup.-21] e * cm. Subject Index C07, C31
1. Introduction The Standard Model (SM) [1,2] is an extremely successful theory of elementary particles. Even though more than 50 years have passed since it was first proposed, it remains [...]

12. Process integration of fine pitch micro-bumping and Cu redistribution wiring for power efficient SiP [2010]

  • Ezawa, H., Togasaki, T., Migita, T., Yamashita, S., Inohara, M., Koshio, Y., Fukuda, M., Miyata, M., Nagamine, K., and Iijima, T.
  • 3rd Electronics System Integration Technology Conference ESTC Electronic System-Integration Technology Conference (ESTC), 2010 3rd. :1-6 Sep, 2010

13. Performance of a Remotely Located Muon Radiography System to Identify the Inner Structure of a Nuclear Plant [2013]

  • Fujii, H., Hara, K., Hashimoto, S., Ito, F., Kakuno, H., Kim, S. H., Kochiyama, M., Nagamine, K., Suzuki, A., Takada, Y., Takahashi, Y., Takasaki, F., and Yamashita, S.
Subjects
Physics - Instrumentation and Detectors and High Energy Physics - Experiment
Abstract
The performance of a muon radiography system designed to image the inner structure of a nuclear plant located at a distance of 64 m was evaluated. We concluded absence of the fuel in the pressure vessel during the measurement period and succeeded in profiling the fuel material placed in the storage pool. The obtained data also demonstrated the sensitivity of the system to water level changes in the reactor well and the dryer-separator pool. It is expected that the system could reconstruct a 2 m cubic fuel object easily. By operating multiple systems, typically four identical systems, viewing the reactor from different directions simultaneously, detection of a 1 m cubic object should also be achievable within a few month period.
Comment: * hara@hep.px.tsukuba.ac.jp; accepted for publication in Progress of Theoretical and Experimental Physics

14. Immature platelet fraction (IPF) as a predictive value for thrombopoietic recovery after allogeneic stem cell transplantation [2018]

  • Sakuragi, M., Hayashi, S., Maruyama, M., Kiyokawa, T., Nagamine, K., Fujita, J., Maeda, T., Kato, H., Kashiwagi, H., and Kanakura, Y.
  • INTERNATIONAL JOURNAL OF HEMATOLOGY. 107(3):320-326

15. New precise measurement of muonium hyperfine structure interval at J-PARC [2017]

  • Ueno, Y., Aoki, M., Fukao, Y., Higashi, Y., Higuchi, T., Iinuma, H., Ikedo, Y., Ishida, K., Ito, T. U., Iwasaki, M., Kadono, R., Kamigaito, O., Kanda, S., Kawall, D., Kawamura, N., Koda, A., Kojima, K. M., Kubo, M. K., Matsuda, Y., Mibe, T., Miyake, Y., Mizutani, T., Nagamine, K., Nishiyama, K., Ogitsu, T., Okubo, R., Saito, N., Sasaki, K., Shimomura, K., Strasser, P., Sugano, M., Tajima, M., Tanaka, K. S., Tomono, D., Torii, H. A., Torikai, E., Toyoda, A., Ueno, K., Yamamoto, A., and Yoshida, M.
  • Hyperfine Interactions. November 2017 238(1):1-6

16. Design of muon accelerators for an advanced muon facility [2007]

  • Miyadera, H., Jason, A.J., and Nagamine, K.
  • 2007 IEEE Particle Accelerator Conference (PAC) Particle Accelerator Conference, 2007. PAC. IEEE. :3032-3034 Jun, 2007

17. Imaging the cool gas, dust, star formation, and AGN in the first galaxies [2009]

  • Carilli, C. L., Myers, S., Appleton, P., Bertoldi, F., Blain, A., Dale, D., Fan, X., Li, Y., Menten, K., Nagamine, K., Narayanan, D., Omont, A., Strauss, M., Taniguchi, Yoshi, Wagg, J., Walter, F., Wolfe, A., Wootten, A., and Yun, M. S.
Subjects
Astrophysics - Cosmology and Extragalactic Astrophysics
Abstract
When, and how, did the first galaxies and supermassive black holes (SMBH) form, and how did they reionization the Universe? First galaxy formation and cosmic reionization are among the last frontiers in studies of cosmic structure formation. We delineate the detailed astrophysical probes of early galaxy and SMBH formation afforded by observations at centimeter through submillimeter wavelengths. These observations include studies of the molecular gas (= the fuel for star formation in galaxies), atomic fine structure lines (= the dominant ISM gas coolant), thermal dust continuum emission (= an ideal star formation rate estimator), and radio continuum emission from star formation and relativistic jets. High resolution spectroscopic imaging can be used to study galaxy dynamics and star formation on sub-kpc scales. These cm and mm observations are the necessary compliment to near-IR observations, which probe the stars and ionized gas, and X-ray observations, which reveal the AGN. Together, a suite of revolutionary observatories planned for the next decade from centimeter to X-ray wavelengths will provide the requisite panchromatic view of the complex processes involved in the formation of the first generation of galaxies and SMBHs, and cosmic reionization.
Comment: 8 pages total. White paper submitted to the Astro 2010 Decadal Survey

18. New muonium HFS measurements at J-PARC/MUSE [2016]

  • Strasser, P., Aoki, M., Fukao, Y., Higashi, Y., Higuchi, T., Iinuma, H., Ikedo, Y., Ishida, K., Ito, T. U., Iwasaki, M., Kadono, R., Kamigaito, O., Kanda, S., Kawall, D., Kawamura, N., Koda, A., Kojima, K. M., Kubo, K., Matsuda, Y., Matsudate, Y., Mibe, T., Miyake, Y., Mizutani, T., Nagamine, K., Nishimura, S., Nishiyama, K., Ogitsu, T., Okubo, R., Saito, N., Sasaki, K., Seo, S., Shimomura, K., Sugano, M., Tajima, M., Tanaka, K. S., Tanaka, T., Tomono, D., Torii, H. A., Torikai, E., Toyoda, A., Ueno, K., Ueno, Y., Yagi, D., Yamamoto, A., and Yoshida, M.
  • Hyperfine Interactions. December 2016 237(1):1-9

19. Spin dynamics in copper metaborate $CuB_2 O_4$ studied by muon spin relaxation [2006]

  • Fukaya, A., Watanabe, I., Yamada, K., and Nagamine, K.
Subjects
Condensed Matter - Materials Science and Condensed Matter - Strongly Correlated Electrons
Abstract
Copper metaborate CuB$_2$O$_{4}$ was studied by muon spin relaxation measurements in order to clarify its static and dynamic magnetic properties. The time spectra of muon spin depolarization suggest that the local fields at the muon site contain both static and fluctuating components in all ordered phases down to 0.3 K. In the weak ferromagnetic phase (20 K~$>T>$~9.3 K), the static component is dominant. On the other hand, upon cooling the fluctuating component becomes dominant in the incommensurate helix phase (9.3K > T > 1.4K). The dynamical fluctuations of the local fields persist down to 0.3K, where a new incommensurate phase (T < 1.4K) is expected to appear. This result suggests that spins fluctuate even at T \to 0. We propose two possible origins of the remnant dynamical spin fluctuations: frustration of the exchange interactions and the dynamic behavior of the soliton lattice.

20. New precise measurements of muonium hyperfine structure at J-PARC MUSE [2019]

  • Strasser P., Abe M., Aoki M., Choi S., Fukao Y., Higashi Y., Higuchi T., Iinuma H., Ikedo Y., Ishida K., Ito T., Ito T. U., Iwasaki M., Kadono R., Kamigaito O., Kanda S., Kawagoe K., Kawall D., Kawamura N., Kitaguchi M., Koda A., Kojima K. M., Kubo K., Matama M., Matsuda Y., Matsudate Y., Mibe T., Miyake Y., Mizutani T., Nagamine K., Nishimura S., Ogitsu T., Saito N., Sasaki K., Seo S., Shimizu H. M., Shimomura K., Suehara T., Tajima M., Tanaka K. S., Tanaka T., Tojo J., Tomono D., Torii H. A., Torikai E., Toyoda A., Tsutsumi Y., Ueno K., Ueno Y., Yagi D., Yamamoto A., Yamanaka T., Yamazaki T., Yasuda H., Yoshida M., and Yoshioka T.
  • EPJ Web of Conferences, Vol 198, p 00003 (2019)
Subjects
Physics and QC1-999
Abstract
High precision measurements of the ground state hyperfine structure (HFS) of muonium is a stringent tool for testing bound-state quantum electrodynamics (QED) theory, determining fundamental constants of the muon magnetic moment and mass, and searches for new physics. Muonium is the most suitable system to test QED because both theoretical and experimental values can be precisely determined. Previous measurements were performed decades ago at LAMPF with uncertainties mostly dominated by statistical errors. At the J-PARC Muon Science Facility (MUSE), the MuSEUM collaboration is planning complementary measurements of muonium HFS both at zero and high magnetic field. The new high-intensity muon beam that will soon be available at H-Line will provide an opportunity to improve the precision of these measurements by one order of magnitude. An overview of the different aspects of these new muonium HFS measurements, the current status of the preparation for high-field measurements, and the latest results at zero field are presented.

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