Publications

H. Aghai-Khozani et al.
Limits on the antiproton-nuclei annihilation cross sections at 125 keV
(2020)

M. Hori, H. Aghai-Khozani, A. Soter, A. Dax, D. Barna
Laser spectroscopy of pionic helium
Nature 581, 37 (2020).

Y. Murakami, H. Aghai-Khozani, M. Hori
Lead fluoride Cherenkov detector read out by avalanche photodiodes for measuring the intensities of pulsed antiproton beams
Nuclear Instruments and Methods in Physics Research A 933, 75 (2019).

H. Aghai-Khozani et al.
Measurement of the antiproton-nucleus annihilation cross-section at low energy
Nuclear Physics A 970, 366 (2018).

M. Hori et al.
Single-photon laser spectroscopy of cold antiprotonic helium
Hyperfine Interact. 239, 44 (2018).

M. Hori et al.
Recent progress of laser spectroscopy experiments on antiprotonic helium
Philosophical Transactions of the Royal Society A 376, 20170270 (2018).

M. Hori et al.
Invited review article: Physics research of this year: cooling of antiprotonic helium and the antiproton-to-electron mass ratio
Parity 33, 15 (2018).

H. Aghai-Khozani et al.
Antiproton-nucleus annihilation cross section at low energy
EPJ Web of Conferences 182, 03013 (2018).

H. Aghai-Khozani et al.
Experimental technique for antiproton-nucleus annihilation cross section measurements at low energy
EPJ Web of Conferences 182, 03009 (2018).

M. Hori et al.
Precision laser spectroscopy experiments on antiprotonic helium
EPJ Web of Conferences 181, 01001 (2018).

M. Hori et al.
Laser spectroscopy of antiprotonic helium, and the antiproton-to-electron mass ratio measured by ASACUSA
52nd Recontres de Moriond on Electroweak Interactions and Unified Theories 103 (2017).

M. Hori et al.
Buffer gas cooling of antiprotonic helium to 1.5 to 1.7 K, and antiproton-to-electron mass ratio
Science 354, 610 (2016).

K. Todoroki, ..., M. Hori
Instrumentation for measurement of in-flight annihilation of 130 keV antiprotons on thin target foils
Nuclear Instruments and Methods in Physics Research A 835, 110 (2016).

M. Hori
First measurement of the antiproton-nucleus annihilation cross section at 125 keV
Hyperfine Interact. 234, 85 (2015).

M. Hori
Method for laser spectroscopy of metastable pionic helium atoms
Hyperfine Interact. 233, 83 (2015).

M. Hori
Towards laser spectroscopy of pionic helium atoms at Paul Scherrer Institute
PoS 213, 342 (2015).

M. Hori
Invited review: Laser spectroscopy of antiprotonic and pionic helium
Genshikaku Kenkyu 59, 72 (2014).

M. Hori, A. Soter, and V.I. Korobov
Proposed method for laser spectroscopy of pionic helium atoms to determine the charged-pion mass
Phys. Rev. A 89, 042515 (2014).

A. Soter, K. Todoroki, T. Kobayashi, D. Barna, D. Horvath, and M. Hori
Segmented scintillation detector with silicon photomultiplier readout for measuring antiproton annihilations
Rev. Sci. Instrum. 85, 023302 (2014).

M. Hori and J. Walz
Physics at CERN's Antiproton Decelerator (review article)
Progress in Particle and Nuclear Physics 72, 206 (2013).

T. Kobayashi, ........, M. Hori
Observation of the 1154.9 nm transition of antiprotonic helium
Journal of Physics B 46, 245004 (2013).

M. Corradini et al.
Experimental apparatus for annihilation cross-section measurements of low energy antiprotons
Nuclear Instruments and Methods in Physics Research A 711, 12 (2013).

S. Friedreich et al.
Microwave spectroscopic study of the hyperfine structure of antiprotonic 3He
Journal of Physics B 46, 125003 (2013).

M. Hori
Probing antiprotonic helium with precise lasers (invited news article)
SPIE Newsroom DOI: 10.1117/2.1201304.004783 (2013).

D. Barna et al.
Two-photon laser spectroscopy of antiprotonic helium and the antiproton-to-electron mass ratio
11th Conference on the Intersections of Particle and Nuclear Physics 1560, 142 (2013).

M. Hori
Two photon laser spectroscopy of antiprotonic helium (invited mini review)
International Journal of Modern Physics E - Nuclear Physics 22, 1330024 (2013).

H. Aghai-Khozani et al.
First experimental detection of antiproton in-flight annihilation on nuclei at 130 keV
European Physical Journal Plus 127, 10 (2012).

K. Todoroki, M. Hori
Beam profile monitor for antiproton-nucleus annihilation cross section measurements
JINST 7, C02052 (2012).

N. Kuroda et al.
Development of a monoenergetic ultraslow antiproton beam source for high-precision investigation
Phys. Rev. ST Accel. Beams 15, 024702 (2012).

D. Barna
Progress in precision laser spectroscopy of antiprotonic helium
Hyperfine Interactions 212, 159 (2012).

A. Bianconi et al.
Measurement of the antiproton-nucleus annihilation cross-section at 5.3 MeV
Physics Letters B 704, 461 (2011).

M. Hori et al.
Two-photon laser spectroscopy of antiprotonic helium and the antiproton-to-electron mass ratio
Nature 475, 484 (2011).

S. Friedreich et al.
First observation of two hyperfine transitions in antiprotonic 3He
Physics Letters B 700, 1 (2011).

M. Hori, V.I. Korobov
Calculation of transition probabilities and ac Stark shifts in two-photon laser transitions of antiprotonic helium
Physical Review A 81, 062508 (2010).

M. Hori, R.S. Hayano, M. Fukuta, T. Koyama, H. Nobusue, J. Tanaka
Large-area imager of hydrogen leaks in fuel cells using laser-induced breakdown spectroscopy
Review of Scientific Instruments 80, 103104 (2009).

T. Pask, D. Barna, A. Dax, R.S. Hayano, M. Hori, D. Horvath, S. Friedreich, B. Juhasz, O. Massiczek, N. Ono, A. Soter, E. Widmann
Antiproton magnetic moment determined from the HFS of pbar-He+
Physics Letters B 678, 55 (2009).

M. Hori, A. Dax
Chirp-corrected, nanosecond Ti:sapphire laser with 6 MHz linewidth for spectroscopy of antiprotonic helium
Optics Letters 34, 1273 (2009).

N. Kuroda, H.A. Torii, M. Shibata, Y. Nagata, D. Barna, M. Hori, D. Horvath, A. Mohri, J. Eades, K. Komaki, Y. Yamazaki
Radial compression of an antiproton cloud for production of intense antiproton beams
Phys. Rev. Lett. 100, 203402 (2008).

T. Pask, D. Barna, A. Dax, R.S. Hayano, M. Hori, D. Horvath, B. Juhasz, C. Malbrunot, J. Marton, N. Ono, K. Suzuki, J. Zmeskal, E. Widmann
Improved study of the antiprotonic helium hyperfine structure
J. Phys. B 41, 081008 (2008).

M. Hori, K. Hanke
Spatial and temporal beam profile monitor with nanosecond resolution for CERN's Linac4 and Superconducting Proton Linac
Nucl. Instrum. Methods in Phys. Research A 588, 359 (2008).

R.S. Hayano, M. Hori, D. Horvath, E. Widmann
Antiprotonic helium and CPT invariance
Rep. Prog. Phys. 70, 1995 (2007).

M. Hori, A. Dax, J. Eades, K. Gomikawa, R.S. Hayano, N. Ono, W. Pirkl, E. Widmann, H.A. Torii, B. Juhasz, D. Barna, D. Horvath
Determination of the Antiproton-to-Electron Mass Ratio by Precision Laser Spectroscopy of Pbar-He+
Phys. Rev. Lett. 96, 243401 (2006).

B. Juhasz, D. Barna, J. Eades, H. Fuhrmann, R. S. Hayano, M. Hori, D. Horvath, H.A. Torii, E. Widmann, H. Yamaguchi, T. Yamazaki, J. Zmeskal
Low temperature behavior of collisions between antiprotonic helium and hydrogen molecules and an indication of the Wigner threshold law
Chem. Phys. Lett. 427, 246 (2006).

M. Hori
Photocathode microwire monitor for nondestructive and highly sensitive spatial profile measurements of ultraviolet, x-ray, and charged particle beams
Rev. Sci. Instr. 76, 113303 (2005).

M. Hori, J. Eades, R.S. Hayano, W. Pirkl, E. Widmann, H. Yamaguchi, H.A. Torii, B. Juhasz, D. Horvath, K. Suzuki, T. Yamazaki
Observation of Cold, Long-lived Antiprotonic Helium Ions
Phys. Rev. Lett. 94, 063401 (2005).

N. Kuroda, H.A. Torii, K. Y. Franzen, Z. Wang, S. Yoneda, M. Inoue, M. Hori, B. Juhasz, D. Horvath, H. Higaki, A. Mohri, J. Eades, K. Komaki, Y. Yamazaki
Confinement of a large number of antiprotons and production of an ultraslow antiproton beam
Phys. Rev. Lett. 94, 023401 (2005).

M. Hori, J. Eades, E. Widmann, T. Yamazaki, R.S. Hayano, T. Ishikawa, H.A. Torii, T. von Egidy, F. J. Hartmann, B. Ketzer, C. Maierl, R. Pohl, M. Kumakura, N. Morita, D. Horvath, I. Sugai
Populations and lifetimes in the v = n-l-1 = 2 and 3 metastable cascades of He+ measured by pulsed and continuous antiproton beams
Phys. Rev. A 70, 012504 (2004).

H. Yamaguchi, R.S. Hayano, T. Ishikawa, J. Sakaguchi, E. Widmann, J. Eades, M. Hori, H.A. Torii, B. Juhasz, D. Horvath, T. Yamazaki
Systematic study of the decay rates of antiprotonic helium states
Phys. Rev. A 70, 012501 (2004).

M. Hori
Parallel plate chambers for monitoring the profiles of high-intensity pulsed antiproton beams
Nucl. Instrum. Methods in Phys. Research A 522, 420 (2004).

J. Sakaguchi, H. Gilg, R.S. Hayano, T. Ishikawa, K. Suzuki, E. Widmann, H. Yamaguchi, F. Caspers, J. Eades, M. Hori, D. Barna, D. Horvath, B. Juhasz, H.A. Torii, T. Yamazaki
Cryogenic tunable microwave cavity at 13 GHz for hyperfine spectroscopy of antiprotonic helium
Nucl. Instrum. Methods in Phys. Research A 533, 598 (2004).

M. Hori
Precision measurements on the properties of antiprotons
Physics Reports 403-404, 337 (2004).

H. Higaki, N. Kuroda, K. Yoshiki Franzen, Z. Wang, M. Hori, A. Mohri, K. Komaki, Y. Yamazaki
Radial compression of protons and H+3 ions in a multiring trap for the production of ultralow energy antiproton beams
Phys. Rev. E 70, 026501 (2004).

M. Hori
Atomic transition frequencies and primary populations of pHe+ measured by ASACUSA
Nucl. Instrum. Methods in Phys. Research B 214, 74 (2004).

E. Widmann, R.S. Hayano, M. Hori, T. Yamazaki
Measurement of the hyperfine structure of antihydrogen
Nucl. Instrum. Methods in Phys. Research B 214, 31 (2004).

M. Hori, R.S. Hayano, E. Widmann, H. A. Torii
Resolution enhancement of pbar-He+ atomic line profiles measured with a pulsed dye laser and Fizeau wavelength meter
Optics Letters 28, 2479 (2003).

M. Hori, J. Eades, R. S. Hayano, T. Ishikawa, W. Pirkl, E. Widmann, H. Yamaguchi, H.A. Torii, B. Juhasz, D. Horvath, T. Yamazaki
Direct measurement of transition frequencies in isolated pbar-He+ atoms, and new CPT violation limits on the antiproton charge and mass
Phys. Rev. Lett. 91, 123401 (2003).

B. Juhasz, J. Eades, R.S. Hayano, M. Hori, D. Horvath, T. Ishikawa, H.A. Torii, E. Widmann, H. Yamaguchi, T. Yamazaki
Quantum tunnelling effects revealed in collisions of antiprotonic helium with hydorgenic molecules at low temperatures
Chem. Phys. Lett. 379, 91 (2003).

M. Hori, K. Yamashita, R. S. Hayano, T. Yamazaki
Analog Cherenkov detectors used in laser spectroscopy experiment on antiprotonic helium
Nucl. Instrum. Methods in Phys. Research A 496, 102 (2003).

K. Yoshiki Franzen, N. Kuroda, H.A. Torii, M. Hori, Z. Wang, H. Higaki, S. Yoneda, B. Juhasz, D. Horvath, A. Mohri, K. Komaki, Y. Yamazaki
Transport beam line for ultraslow monoenergetic antiprotons
Rev. Sci. Instrum. 74, 3305 (2003).

E. Widmann, J. Eades, T. Ishikawa, J. Sakaguchi, T. Tasaki, H. Yamaguchi, R.S. Hayano, M. Hori, H.A. Torii, B. Juhasz, D. Horvath, T. Yamazaki
Hyperfine Structure of Antiprotonic Helium Revealed by a Laser-microwave-laser resonance method
Phys. Rev. Lett. 89, 243402 (2002).

H. Yamaguchi, T. Ishikawa, J. Sakaguchi, E. Widmann, J. Eades, R.S. Hayano, M. Hori, H.A. Torii, B. Juhasz, D. Horvath, T. Yamazaki
Anomalies in the decay rates of antiprotonic helium atom states
Phys. Rev. A 66, 022504 (2002).

M. Hori, J. Eades, R.S. Hayano, T. Ishikawa, J. Sakaguchi, T. Tasaki, E. Widmann, H. Yamaguchi, H.A. Torii, B. Juhasz, D. Horvath, T. Yamazaki
Primary populations of metastable antiprotonic 4He and 3He atoms
Phys. Rev. Lett. 89, 093401 (2002).

B. Juhasz, J. Eades, R.S. Hayano, M. Hori, D. Horvath, T. Ishikawa, J. Sakaguchi, H. A. Torii, E. Widmann, H. Yamaguchi, T. Yamazaki
Quenching of metastable antiprotonic helium atoms in collisions with deuterium molecules
Eur. Phys. J. D 18, 261 (2002).

H. Higaki, N. Kuroda, T. Ichioka, K. Yoshiki Franzen, Z. Wang, K. Komaki, Y. Yamazaki, M. Hori, N. Oshima, A. Mohri
Electron cooling of high energy protons in a multi-ring trap with a tank circuit monitoring the electron plasma oscillations
Phys. Rev. E 65, 046410 (2002).

M. Hori, J. Eades, R.S. Hayano, T. Ishikawa, J. Sakaguchi, E. Widmann, H. Yamaguchi, H.A. Torii, B. Juhasz, D. Horvath, T. Yamazaki
Sub-ppm laser spectroscopy of antiprotonic helium and a CPT-violation limit on the antiprotonic charge and mass
Phys. Rev. Lett. 87, 093401 (2001).

M. Hori
The ASACUSA experiment at CERN's Antiproton Decelerator
Nucl. Phys. A 692, 119 (2001).

B. Ketzer, T. von Egidy, F. J. Hartmann, C. Maierl, R. Pohl, J. Eades, E. Widmann, T. Yamazaki, M. Kumakura, N. Morita, R.S. Hayano, M. Hori, T. Ishikawa, H.A. Torii, I. Sugai, D. Horvath
Collisional quenching of metastable states of antiprotonic helium by hydrogen and deuterium molecules
Eur. Phys. J. D 13, 305 (2001).

M. Hori, H.A. Torii, R. S. Hayano, T. Ishikawa, F.E. Maas, H. Tamura, B. Ketzer, F. J. Hartmann, R. Pohl, C. Maierl, M. Hasinoff, T. von Egidy, M. Kumakura, N. Morita, I. Sugai, D. Horvath, E. Widmann, J. Eades, T. Yamazaki
Laser spectroscopic studies of state-dependent collisional quenching of the lifetimes of metastable antiprotonic helium atoms
Phys. Rev. A 57, 1698 (1998).

B. Ketzer, F. J. Hartmann, T. von Egidy, C. Maierl, R. Pohl, J. Eades, E. Widmann, T. Yamazaki, M. Kumakura, N. Morita, R.S. Hayano, M. Hori, T. Ishikawa, H.A. Torii, I. Sugai, D. Horvath
Hydrogen-assisted laser-induced resonant transitions between metastable states of antiprotonic helium atoms
Phys. Rev. Lett. 78, 1671 (1997).

H.A. Torii, M. Hori, T. Ishikawa, F.E. Maas, R. S. Hayano, N. Morita, M. Kumakura, I. Sugai,  B. Ketzer, H. Daniel, F. J. Hartmann, R. Pohl, R. Schmidt,   T. von Egidy, D. Horvath, J. Eades, E. Widmann, T. Yamazaki
Laser-induced resonant transitions in the v=n-l-1=2 and 3 metastable cascades of antiprotonic 3He atoms
Phys. Rev. A 53, R1931 (1996).

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