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23 results on '"Candell, E."'

1. Measurement of the Proton's Neutral Weak Magnetic Form Factor

Author

Mueller, B., Beck, D. H., Beise, E. J., Candell, E., Cardman, L., Carr, R., DiBari, R. C., Dodson, G., Dow, K., Duncan, F., Farkhondeh, M., Filippone, B. W., Forest, T., Gao, H., Korsch, W., Kowalski, S., Lung, A., McKeown, R. D., Mohring, R., Napolitano, J., Nilsson, D., Pitt, M., Simicevic, N., Terburg, B., and Wells, S. P.

Subjects
Nuclear Experiment
Abstract

We report the first measurement of the parity-violating asymmetry in elastic electron scattering from the proton. The asymmetry depends on the neutral weak magnetic form factor of the proton which contains new information on the contribution of strange quark-antiquark pairs to the magnetic moment of the proton. We obtain the value $G_M^Z= 0.34 \pm 0.09 \pm 0.04 \pm 0.05$ n.m. at $Q^2=0.1$ (GeV/c)${}^2$., Comment: 4 pages TEX, text available at http://www.krl.caltech.edu/preprints/OAP.html

Published
1997
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2. A High Power Hydrogen Target for Parity Violation Experiments

Author

Beise, E. J., Beck, D. H., Candell, E., Carr, R., Duncan, F., Forest, T., Korsch, W., Mark, J. W., McKeown, R. D., Mueller, B. A., and Wells, S.

Subjects
Nuclear Experiment
Abstract

Parity-violating electron scattering measurements on hydrogen and deuterium, such as those underway at the Bates and CEBAF laboratories, require luminosities exceeding $10^{38}$cm$^{-2}$s$^{-1}$, resulting in large beam power deposition into cryogenic liquid. Such targets must be able to absorb 500 watts or more with minimal change in target density. A 40~cm long liquid hydrogen target, designed to absorb 500~watts of beam power without boiling, has been developed for the SAMPLE experiment at Bates. In recent tests with 40~$\mu$A of incident beam, no evidence was seen for density fluctuations in the target, at a sensitivity level of better than 1\%. A summary of the target design and operational experience will be presented., Comment: 13 pages, 9 postscript figures

Published
1996
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3. SAMPLE: Parity Violating Electron Scattering from Hydrogen and Deuterium

Author

Beise, E. J., Arrington, J., Beck, D. H., Candell, E., Carr, R., Dodson, G., Dow, K., Duncan, F., Farkhondeh, M., Filippone, B. W., FOrest, T., Gao, H., Korsch, W., Kowalski, S., Lung, A., McKeown, R. D., Mohring, R., Mueller, B. A., Napolitano, J., Pitt, M., Simicevic, N., Tsentalovich, E., and Wells, S.

Subjects
Nuclear Experiment
Abstract

Recently, there has been considerable theoretical interest in determining strange quark contributions to hadronic matrix elements. Such matrix elements can be accessed through the nucleon's neutral weak form factors as determined in parity violating electron scattering. The SAMPLE experiment will measure the strange magnetic form factor $G_M^s$ at low momentum transfer. By combining measurements from hydrogen and deuterium the theoretical uncertainties in the measurement can be greatly reduced and the result will be limited by experimental errors only. A summary of recent progress on the SAMPLE experiment is presented., Comment: 9 pages, 3 embedded postscript figures using psfigure.sty; proceedings of the 9th Amsterdam miniconference on electromangetic studies of the deuteron

Published
1996

7. Measurement of the spin-dependent asymmetry in 3→(e→,e′) inelastic scattering at low energy transfer

Author

Jones, C. E., Arrington, J., Beise, E. J., Bray, B., Carr, R. W., Filippone, B. W., Gao, H., Lung, A., McKeown, R. D., Mueller, B., Pitt, M. L., DeSchepper, D., Dodson, G., Dow, K., Ent, R., Farkhondeh, M., Hansen, J.-O., Korsch, W., Kramer, L. H., Lee, K., Makins, N. C. R., Milner, R. G., Tieger, D. R., Welch, T. P., Candell, E., Napolitano, J., Tripp, C., Wojtsekhowski, B. B., and Lorenzon, W.

Subjects
Caltech Library Services
Abstract

We present the results of a measurement of the spin-dependent asymmetry in 3→(e→,e′) inelastic scattering at kinematics on the low-energy transfer side of the quasielastic peak, including the region near the breakup threshold. Comparison with existing calculations based upon the plane wave impulse approximation shows significant deviation between the data and the model near the breakup threshold. Good agreement between data and theory is seen at higher energy transfer.

Published
1995

8. Transverse-Longitudinal Asymmetry in the Quasielastic 3→He(→e, e′) Reaction

Author

John Arrington, Beise, E. J., Bray, B., Candell, E., Carr, R. W., Deschepper, D., Dodson, G., Donnelly, T. W., Ent, K. D. R., Farkhondeh, M., Filippone, B. W., Gao, H., Hansen, J. -O, Jones, C. E., Korsch, W., Kramer, L. H., Lee, K., Lorenzon, W., Lung, A., Makins, N. C. R., Mckeown, R. D., Milner, R. G., Mueller, B., Napolitano, J., Pitt, M. L., Sauer, P. U., Schulze, R. -W, Tieger, D. R., Titko, M. A., Tripp, C., Welch, T. P., and Wojtsekhowski, B. B.

Subjects
plane wave impulse approximation, Nuclear Theory, three-body system, ddc:530, High Energy Physics::Experiment, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Nuclear Experiment, Caltech Library Services, quasielastic scattering
Abstract

The transverse-longitudinal asymmetry ATL′ in 3He→(e→, e′) quasielastic scattering at momentum transfer Q2=0.14 (GeV/c)^2 has been measured to be 1.52 ± 0.55(stat) ± 0.15(syst)%. The plane wave impulse approximation (PWIA) prediction for this measurement ranges from 2.1% to 2.9%, where the variation is due to uncertainty in the initial state wave function, nucleon form factors, and off-shell prescription. The data may suggest a suppression with respect to the PWIA, which has also been observed for the unpolarized longitudinal response function.

Published
1995
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9. Measurement of the neutron magnetic form factor from inclusive quasielastic scattering of polarized electrons from polarized ³He

Author

Gao, H., Arrington, J., Beise, E. J., Bray, B., Carr, R. W., Filippone, B. W., Lung, A., McKeown, R. D., Mueller, B., Pitt, M. L., Jones, C. E., DeSchepper, D., Dodson, G., Dow, K., Ent, R., Farkhondeh, M., Hansen, J.-O., Korsch, W., Kramer, L. H., Lee, K., Makins, N., Milner, R. G., Tieger, D. R., Welch, T. P., Candell, E., Napolitano, J., Wojtsekhowski, B. B., Tripp, C., and Lorenzon, W.

Subjects
Nuclear Theory, Nuclear Experiment, Caltech Library Services
Abstract

We report a measurement of the asymmetry in spin-dependent quasielastic scattering of longitudinally polarized electrons from a polarized ³He target. The neutron magnetic form factor GM^n has been extracted from the measured asymmetry based on recent PWIA calculations using spin-dependent spectral functions. Our determination of GM^n at Q² = 0.19 (GeV/c)² agrees with the dipole parametrization. This experiment represents the first measurement of the neutron magnetic form factor using spin-dependent electron scattering.

Published
1994

10. Transverse-Longitudinal Asymmetry in the Quasielastic 3He→(e→, e′) Reaction

Author

Hansen, J.-O., Titko, M. A., DeSchepper, D., Dodson, G., Donnelly, T. W., Ent, K. Dow R., Farkhondeh, M., Korsch, W., Kramer, L. H., Lee, K., Makins, N. C. R., Milner, R. G., Tieger, D. R., Welch, T. P., Jones, C. E., Arrington, J., Beise, E. J., Bray, B., Carr, R. W., Filippone, B. W., Gao, H., Lung, A., McKeown, R. D., Mueller, B., Pitt, M. L., Schulze, R.-W., Sauer, P. U., Candell, E., Napolitano, J., Tripp, C., Wojtsekhowski, B. B., Lorenzon, W., Hansen, J.-O., Titko, M. A., DeSchepper, D., Dodson, G., Donnelly, T. W., Ent, K. Dow R., Farkhondeh, M., Korsch, W., Kramer, L. H., Lee, K., Makins, N. C. R., Milner, R. G., Tieger, D. R., Welch, T. P., Jones, C. E., Arrington, J., Beise, E. J., Bray, B., Carr, R. W., Filippone, B. W., Gao, H., Lung, A., McKeown, R. D., Mueller, B., Pitt, M. L., Schulze, R.-W., Sauer, P. U., Candell, E., Napolitano, J., Tripp, C., Wojtsekhowski, B. B., and Lorenzon, W.

Abstract

The transverse-longitudinal asymmetry ATL′ in 3He→(e→, e′) quasielastic scattering at momentum transfer Q2=0.14 (GeV/c)^2 has been measured to be 1.52 ± 0.55(stat) ± 0.15(syst)%. The plane wave impulse approximation (PWIA) prediction for this measurement ranges from 2.1% to 2.9%, where the variation is due to uncertainty in the initial state wave function, nucleon form factors, and off-shell prescription. The data may suggest a suppression with respect to the PWIA, which has also been observed for the unpolarized longitudinal response function.

Published
1995

11. Measurement of the spin-dependent asymmetry in 3→(e→,e′) inelastic scattering at low energy transfer

Author

Arrington, J., Arrington, J., Beise, E.J., Bray, B., Carr, R.W., Filippone, B.W., Gao, H., Lung, A., McKeown, R.D., Mueller, B., Pitt, M.L., DeSchepper, D., Dodson, G., Dow, K., Ent, R., Farkhondeh, M., Hansen, J.-O., Korsch, W., Kramer, L.H., Lee, K., Makins, N.C.R., Milner, R.G., Teiger, D.R., Welch, T.P., Candell, E., Napolitano, J., Tripp, C., Wojtsekhowski, B.B., Arrington, J., Arrington, J., Beise, E.J., Bray, B., Carr, R.W., Filippone, B.W., Gao, H., Lung, A., McKeown, R.D., Mueller, B., Pitt, M.L., DeSchepper, D., Dodson, G., Dow, K., Ent, R., Farkhondeh, M., Hansen, J.-O., Korsch, W., Kramer, L.H., Lee, K., Makins, N.C.R., Milner, R.G., Teiger, D.R., Welch, T.P., Candell, E., Napolitano, J., Tripp, C., and Wojtsekhowski, B.B.

Abstract

We present the results of a measurement of the spin-dependent asymmetry in 3→(e→,e′) inelastic scattering at kinematics on the low-energy transfer side of the quasielastic peak, including the region near the breakup threshold. Comparison with existing calculations based upon the plane wave impulse approximation shows significant deviation between the data and the model near the breakup threshold. Good agreement between data and theory is seen at higher energy transfer.

Published
1995

12. Measurement of the neutron magnetic form factor from inclusive quasielastic scattering of polarized electrons from polarized 3He

Author

Gao, A., Gao, A., Arrington, J., Beise, E.J., Bray, B., Carr, R.W., Filippone, B.W., Lung, A., McKeown, R.D., Mueller, B., Pitt, M.L., Jones, C.E., DeSchepper, D., Dodson, G., Dow, K., Ent, R., Farkhondeh, M., Hansen, J.-O., Korsch, W., Kramer, L.H., Lee, K., Makins, N., Milner, R.G., Teiger, D.R., Welch, T.P., Candell, E., Napolitano, J., Wojtsekhowski, B.B., Tripp, C., Lorenzon, W., Gao, A., Gao, A., Arrington, J., Beise, E.J., Bray, B., Carr, R.W., Filippone, B.W., Lung, A., McKeown, R.D., Mueller, B., Pitt, M.L., Jones, C.E., DeSchepper, D., Dodson, G., Dow, K., Ent, R., Farkhondeh, M., Hansen, J.-O., Korsch, W., Kramer, L.H., Lee, K., Makins, N., Milner, R.G., Teiger, D.R., Welch, T.P., Candell, E., Napolitano, J., Wojtsekhowski, B.B., Tripp, C., and Lorenzon, W.

Abstract

We report a measurement of the asymmetry in spin-dependent quasielastic scattering of longitudinally polarized electrons from a polarized 3He target. The neutron magnetic form factor GMn has been extracted from the measured asymmetry based on recent PWIA calculations using spin-dependent spectral functions. Our determination of GMn at Q2=0.19 (GeV/c)2 agrees with the dipole parametrization. This experiment represents the first measurement of the neutron magnetic form factor using spin-dependent electron scattering.

Published
1994

13. Measurement of the Proton's Neutral Weak Magnetic Form Factor

Author

Mueller, B., primary, Beck, D. H., additional, Beise, E. J., additional, Candell, E., additional, Cardman, L., additional, Carr, R., additional, DiBari, R. C., additional, Dodson, G., additional, Dow, K., additional, Duncan, F., additional, Farkhondeh, M., additional, Filippone, B. W., additional, Forest, T., additional, Gao, H., additional, Korsch, W., additional, Kowalski, S., additional, Lung, A., additional, McKeown, R. D., additional, Mohring, R., additional, Napolitano, J., additional, Nilsson, D., additional, Pitt, M., additional, Simicevic, N., additional, Terburg, B., additional, and Wells, S. P., additional

Published
1997
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15. Measurement of the spin-dependent asymmetry in→3(e→,e′) inelastic scattering at low energy transfer

Author

Jones, C. E., primary, Arrington, J., additional, Beise, E. J., additional, Bray, B., additional, Carr, R. W., additional, Filippone, B. W., additional, Gao, H., additional, Lung, A., additional, McKeown, R. D., additional, Mueller, B., additional, Pitt, M. L., additional, DeSchepper, D., additional, Dodson, G., additional, Dow, K., additional, Ent, R., additional, Farkhondeh, M., additional, Hansen, J.-O., additional, Korsch, W., additional, Kramer, L. H., additional, Lee, K., additional, Makins, N. C. R., additional, Milner, R. G., additional, Tieger, D. R., additional, Welch, T. P., additional, Candell, E., additional, Napolitano, J., additional, Tripp, C., additional, Wojtsekhowski, B. B., additional, and Lorenzon, W., additional

Published
1995
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16. Transverse-Longitudinal Asymmetry in the QuasielasticHe→3(e→, e′)Reaction

Author

Hansen, J. -O., primary, Titko, M. A., additional, DeSchepper, D., additional, Dodson, G., additional, Donnelly, T. W., additional, Ent, K. Dow R., additional, Farkhondeh, M., additional, Korsch, W., additional, Kramer, L. H., additional, Lee, K., additional, Makins, N. C. R., additional, Milner, R. G., additional, Tieger, D. R., additional, Welch, T. P., additional, Jones, C. E., additional, Arrington, J., additional, Beise, E. J., additional, Bray, B., additional, Carr, R. W., additional, Filippone, B. W., additional, Gao, H., additional, Lung, A., additional, McKeown, R. D., additional, Mueller, B., additional, Pitt, M. L., additional, Schulze, R. -W., additional, Sauer, P. U., additional, Candell, E., additional, Napolitano, J., additional, Tripp, C., additional, Wojtsekhowski, B. B., additional, and Lorenzon, W., additional

Published
1995
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17. Measurement of the neutron magnetic form factor from inclusive quasielastic scattering of polarized electrons from polarized 3He

Author

Gao, H., primary, Arrington, J., additional, Beise, E. J., additional, Bray, B., additional, Carr, R. W., additional, Filippone, B. W., additional, Lung, A., additional, McKeown, R. D., additional, Mueller, B., additional, Pitt, M. L., additional, Jones, C. E., additional, DeSchepper, D., additional, Dodson, G., additional, Dow, K., additional, Ent, R., additional, Farkhondeh, M., additional, Hansen, J.-O., additional, Korsch, W., additional, Kramer, L. H., additional, Lee, K., additional, Makins, N., additional, Milner, R. G., additional, Tieger, D. R., additional, Welch, T. P., additional, Candell, E., additional, Napolitano, J., additional, Wojtsekhowski, B. B., additional, Tripp, C., additional, and Lorenzon, W., additional

Published
1995
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18. The SAMPLE experiment: Parity-violating electron scattering from the proton and deuteron

Author

Pitt, M., primary, Arrington, J., additional, Beck, D., additional, Beise, E., additional, Candell, E., additional, Cardman, L., additional, Carr, R., additional, Dodson, G., additional, Dow, K., additional, Duncan, F., additional, Farkhondeh, M., additional, Filippone, B., additional, Forest, T., additional, Gao, H., additional, Korsch, W., additional, Kowalski, S., additional, Lung, A., additional, McKeown, R., additional, Mohring, R., additional, Mueller, B., additional, Napolitano, J., additional, Šimičević, N., additional, Terburg, B., additional, and Witkowski, M., additional

Published
1995
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19. Measurement of the neutron magnetic form factor from inclusive quasielastic scattering of polarized electrons from polarizedHe3

Author

Gao, H., primary, Arrington, J., additional, Beise, E. J., additional, Bray, B., additional, Carr, R. W., additional, Filippone, B. W., additional, Lung, A., additional, McKeown, R. D., additional, Mueller, B., additional, Pitt, M. L., additional, Jones, C. E., additional, DeSchepper, D., additional, Dodson, G., additional, Dow, K., additional, Ent, R., additional, Farkhondeh, M., additional, Hansen, J.-O., additional, Korsch, W., additional, Kramer, L. H., additional, Lee, K., additional, Makins, N., additional, Milner, R. G., additional, Tieger, D. R., additional, Welch, T. P., additional, Candell, E., additional, Napolitano, J., additional, Wojtsekhowski, B. B., additional, Tripp, C., additional, and Lorenzon, W., additional

Published
1994
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22. Measurement of the spin-dependent asymmetry in 3He

Author

Jones CE, Arrington J, Beise EJ, Bray B, Carr RW, Filippone BW, Gao H, Lung A, McKeown RD, Mueller B, Pitt ML, DeSchepper D, Dodson G, Dow K, Ent R, Farkhondeh M, Hansen J, Korsch W, Kramer LH, Lee K, Makins NC, Milner RG, Tieger DR, Welch TP, Candell E, Napolitano J, Tripp C, Wojtsekhowski BB, and Lorenzon W

Published
1995
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23. Transverse-Longitudinal Asymmetry in the Quasielastic 3He-->(e

Author

Hansen J, Titko MA, DeSchepper D, Dodson G, Donnelly TW, Dow K, Ent R, Farkhondeh M, Korsch W, Kramer LH, Lee K, Makins NC, Milner RG, Tieger DR, Welch TP, Jones CE, Arrington J, Beise EJ, Bray B, Carr RW, Filippone BW, Gao H, Lung A, McKeown RD, Mueller B, Pitt ML, Schulze R, Sauer PU, Candell E, Napolitano J, Tripp C, Wojtsekhowski BB, and Lorenzon W

Published
1995
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