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Your search keyword '"I-Hung Chiang"' showing total 11 results
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11 results on '"I-Hung Chiang"'

1. Double spin asymmetries ANN and ASS at s=200 GeV in polarized proton–proton elastic scattering at RHIC

Author

Adam Rusek, Steven Tepikian, R. E. Chrien, Alexander Khodinov, I-Hung Chiang, R. L. Gill, Kaushik De, Janusz Chwastowski, David Lynn, N. Guler, T. Ljubicic, W. Guryn, S. Bültmann, M. Sakitt, Alexey A. Bogdanov, J. M. Landgraf, B. Pawlik, V. P. Kanavets, Jing Li, B. V. Morozov, L. I. Koroleva, C. Pearson, L. Whitehead, A. Sandacz, A. Drees, K. Yip, I. G. Alekseev, M. Haguenauer, P. Pile, Nurcan Ozturk, Mikhail N. Strikhanov, S. B. Nurushev, Michael Rijssenbeek, M.F. Runtzo, D. N. Svirida, and S. Yeung

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Proton, media_common.quotation_subject, Momentum transfer, Helicity, Asymmetry, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Relativistic Heavy Ion Collider, media_common, Spin-½
Abstract

We present the first measurements of the double spin asymmetries A N N and A S S at s = 200 GeV , obtained by the PP2PP experiment using polarized proton beams at the Relativistic Heavy Ion Collider (RHIC). The data were collected in the four momentum transfer t range 0.01 ⩽ | t | ⩽ 0.03 ( GeV / c ) 2 . The measured asymmetries, which are consistent with zero, allow us to estimate upper limits on the double helicity-flip amplitudes ϕ 2 and ϕ 4 at small | t | as well as on the difference Δ σ T between the total cross sections for transversely polarized protons with antiparallel or parallel spin orientations.

Published
2007
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2. First measurement of AN at s=200 GeV in polarized proton–proton elastic scattering at RHIC

Author

Kaushik De, S. Bültmann, L. I. Koroleva, Adam Rusek, Janusz Chwastowski, J. M. Landgraf, C. Pearson, W. Guryn, R. E. Chrien, M.F. Runtzo, M. Haguenauer, D. N. Svirida, A. Sandacz, A. Drees, P. Pile, Alexander Khodinov, David Lynn, Michael Rijssenbeek, Mikhail N. Strikhanov, N. Guler, B. Pawlik, Alexey A. Bogdanov, L. Whitehead, M. Sakitt, V. P. Kanavets, Jing Li, T. Ljubicic, S. B. Nurushev, I. G. Alekseev, Nurcan Ozturk, I-Hung Chiang, K. Yip, S. Yeung, B. V. Morozov, Steven Tepikian, and R. L. Gill

Subjects
Elastic scattering, Baryon, Nuclear physics, Physics, Nuclear and High Energy Physics, Amplitude, Proton, Hadron, Momentum transfer, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Relativistic Heavy Ion Collider
Abstract

We report on the first measurement of the single spin analyzing power ( A N ) at s = 200 GeV , obtained by the PP2PP experiment using polarized proton beams at the Relativistic Heavy Ion Collider (RHIC). Data points were measured in the four momentum transfer t range 0.01 ⩽ | t | ⩽ 0.03 ( GeV / c ) 2 . Our result, averaged over the whole | t | interval is about one standard deviation above the calculation, which uses interference between electromagnetic spin-flip amplitude and hadronic non-flip amplitude, the source of A N . The difference could be explained by an additional contribution of a hadronic spin-flip amplitude to A N .

Published
2006
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3. Search for the decay K+→π+γγ in the π+ momentum region P>213 MeV/c

Author

T. Numao, J. A. Macdonald, B. Bassalleck, S. H. Kettell, A. Kushnirenko, J. Hu, M. Miyajima, N. V. Yershov, L. G. Landsberg, Masaaki Kobayashi, Ewart W. Blackmore, A. N. Khotjantsev, K. K. Li, P. S. Cooper, T. Sekiguchi, George Redlinger, A. Artamonov, Tamaki Yoshioka, Yoichi Tamagawa, T. Tsunemi, Takashi Nomura, A. Konaka, T. Fujiwara, Douglas Bryman, O. V. Mineev, P. Kitching, I-Hung Chiang, B. Bhuyan, E. J. Ramberg, M. V. Diwan, J. Mildenberger, R. C. Strand, T. Shinkawa, Song Chen, S. Kabe, Yu. G. Kudenko, K. Omata, A. P. Kozhevnikov, T. K. Komatsubara, V. A. Mukhin, Norihito Muramatsu, Y. Yoshimura, R. Poutissou, D. V. Vavilov, B. Lewis, T. Nakano, James Frank, V. Obraztsov, S. V. Petrenko, M. M. Khabibullin, L. S. Littenberg, D. E. Jaffe, D. I. Patalakha, T. Sato, Masaharu Nomachi, B. Viren, S. Sugimoto, I. A. Christidi, R. Tschirhart, and K. Mizouchi

Subjects
Momentum, Physics, Nuclear and High Energy Physics, Particle physics, End point, Chiral perturbation theory, Unitarity, Branching fraction, Order (ring theory), Perturbation theory, Atomic physics
Abstract

We have searched for the K{sup +} {yields} {pi}{sup +}{gamma}{gamma} decay in the kinematic region with {pi}{sup +} momentum close to the end point. No events were observed, and the 90% confidence-level upper limit on the partial branching ratio was obtained, B(K{sup +} {yields} {pi}{sup +}{gamma}{gamma}, P > 213 MeV/c) < 8.3 x 10{sup -9} under the assumption of chiral perturbation theory including next-to-leading order ''unitarity'' corrections. The same data were used to determine an upper limit on the K{sup +} {yields} {pi}{sup +}{gamma} branching ratio of 2.3 x 10{sup -9} at the 90% confidence level.

Published
2005
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4. First measurement of proton–proton elastic scattering at RHIC

Author

B. V. Morozov, R. E. Chrien, Kaushik De, S. Bültmann, I. G. Alekseev, M. Haguenauer, D.N. Svirida, Nurcan Ozturk, Steven Tepikian, S. Yeung, P. Pile, Adam Rusek, Michael Rijssenbeek, David Lynn, N. Guler, Alexey A. Bogdanov, S B Nurushev, I-Hung Chiang, Jing Li, M.F. Runtzo, A. Drees, Janusz Chwastowski, Mikhail N. Strikhanov, R. L. Gill, L. I. Koroleva, C. Pearson, C. Tang, A. Sandacz, B. Pawlik, W. Guryn, M. Sakitt, and V. P. Kanavets

Subjects
Diffraction, Physics, Elastic scattering, Particle physics, Range (particle radiation), Nuclear and High Energy Physics, Proton, FOS: Physical sciences, High Energy Physics - Experiment, Exponential function, Nuclear physics, High Energy Physics - Experiment (hep-ex), Cross section (physics), High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The first result of the pp2pp experiment at RHIC on elastic scattering of polarized protons at sqrt{s} = 200 GeV is reported here. The exponential slope parameter b of the diffractive peak of the elastic cross section in the t range 0.010, 9 pages 5 figures

Published
2004
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5. Observation of the decay KL0→π±π0e∓ν

Author

W.C. Carithers, K. K. Li, T. F. Kycia, I-Hung Chiang, P.O. Mazur, A. S. Carroll, L. S. Littenberg, J.P. de Brion, and M. D. Marx

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Lead glass, Pion, Angular distribution, Hodoscope, Spectrometer, Branching fraction, visual_art, visual_art.visual_art_medium
Abstract

The rare decay KL0→π±π0e∓ν has been observed in an experiment using a MWPC spectrometer and a lead glass counter hodoscope. The observed branching ratio Γ(KL0→π±π0e∓ν)Γ(KL0→all)=(6.2±2.0) × 10−5 agrees well with the theoretical prediction. The charged pion angular distribution was found to be consistent with l = 1 as expected from the |ΔI|=½ rule.

Published
1980
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6. Experimental search for narrow resonances in the reaction π−p→γγ n at 13 GeV/c

Author

G. E. Hogan, Jon J Thaler, K. T. McDonald, T. F. Kycia, A. J.S. Smith, R. A. Johnson, C. Lu, B. P. Kwan, A. R. Wijangco, M. H. Ye, A. M. Halling, K. K. Li, L. S. Littenberg, I-Hung Chiang, and L. A. Garren

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Range (particle radiation), Electromagnetic calorimeter, Atomic physics
Abstract

Using a double arm electromagnetic calorimeter we have searched for narrow states produced in the exclusive reaction π − p→γγn at 13 GeV/c. No enhancements were observed in the mass range 2.0–4.0 GeV/c 2 . For example, the 90% confidence limit on η c production is σ ( π − p→ η c n)× B ( η c → γγ )

Published
1984
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7. Proton-proton diffraction dissociation at incident energies from 175 to 400 GEV

Author

K. Goulianos, R. Yamada, V. Bartenev, V. A. Nikitin, D. Gross, L. S. Zolin, B. Morozov, E. Malamud, R. L. Cool, R.A. Carrigan, V. V. Popov, I-Hung Chiang, A. C. Melissinos, A. A. Kuznetsov, Yu. K. Pilipenko, and S. L. Olsen

Subjects
Nuclear physics, Diffraction, Physics, Nuclear and High Energy Physics, Atomic physics, Dissociation (chemistry)
Abstract

Differential cross sections d 2 σ d t d M X 2 are presented for the inclusive reaction p + p → X in the range 0.01 t c ) 2 , 1.3 m X 2 2 , and incident energies from 175 to 400 GeV. The results are compared with data in the 20 GeV energy region.

Published
1974
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8. Absorption cross section of π±, K±, p and on nuclei between 60 and 280 GeV/c

Author

T. F. Kycia, W. F. Baker, A. Jonckheere, G. Giacomelli, P.O. Mazur, K. K. Li, A. S. Carroll, I-Hung Chiang, R. Rubinstein, M. D. Marx, D.C. Rahm, O.D. Fackler, D. P. Earty, and P. F. M. Koehler

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, chemistry, Absorption cross section, Analytical chemistry, chemistry.chemical_element, Lithium, Absorption (chemistry), Copper
Abstract

Absorption cross sections of π±, K±, p and p have been measured on targets of Li, C, Al, Cu, Sn and Pb at 60, 200, and 280 GeV/c.

Published
1979
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9. Total cross sections of π±, K±, p and on protons and deuterons between 200 and 370 GeV/c

Author

I-Hung Chiang, O.D. Fackler, D.C. Rahm, D. P. Eartly, P. F. M. Koehler, A. Jonckheere, W. F. Baker, M. D. Marx, T. F. Kycia, G. Giacomelli, A. S. Carroll, P.O. Mazur, R. Rubinstein, and K. K. Li

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Deuterium
Abstract

Total cross sections of π ± , K ± , p and p on protons and deuterons have been measured at 6 momenta between 200 and 370 GeV/ c .

Published
1979
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10. Total cross sections of π±, K±, p and on protons and deuterons between 23 and 280 GeV/c

Author

P.M. Mockett, P. F. M. Koehler, D. P. Eartly, K. K. Li, K. Pretzl, A. S. Carroll, T. F. Kycia, I-Hung Chiang, R. Rubinstein, P.O. Mazur, R. L. Cool, A. A. Wehmann, W. F. Baker, O.D. Fackler, G. Giacomelli, and D.C. Rahm

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Deuterium, Pi, Bar (unit)
Abstract

New measurements are reported of total cross sections for π ± , K ± , p and p on protons and deuterons at 11 momenta between 23 and 280 GeV/ c .

Published
1976
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11. Measurement of , p and production by 200 and 300 GeV/c protons

Author

D. P. Eartly, I-Hung Chiang, O.D. Fackler, P.O. Mazur, S. M. Pruss, P. F. M. Koehler, A. S. Carroll, R. Rubinstein, P.M. Mockettt, T. F. Kycia, A. A. Wehmann, D.C. Rahm, K. K. Li, K. Pretzl, W. F. Baker, and G. Giacommelli

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, chemistry, chemistry.chemical_element, Beryllium
Abstract

Data are presented on the yields at 3.6 mr of π±, K±, p and p with momenta between 23 and 197 GeV/c produced by 200 and 300 GeV/c protons incident on beryllium.

Published
1974
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