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245 results on '"Turchinetz, W."'

1. Measurement of the Vector and Tensor Asymmetries at Large Missing Momentum in Quasielastic $(\vec{e}, e^{\prime}p)$ Electron Scattering from Deuterium

Author

DeGrush, A., Maschinot, A., Akdogan, T., Alarcon, R., Bertozzi, W., Booth, E., Botto, T., Calarco, J. R., Clasie, B., Crawford, C., Dow, K., Farkhondeh, M., Fatemi, R., Filoti, O., Franklin, W., Gao, H., Geis, E., Gilad, S., Hasell, D. K., Karpius, P., Kohl, M., Kolster, H., Lee, T., Matthews, J., McIlhany, K., Meitanis, N., Milner, R., Rapaport, J., Redwine, R., Seely, J., Shinozaki, A., Sindile, A., Sirca, S., Six, E., Smith, T., Tonguc, B., Tschalar, C., Tsentalovich, E., Turchinetz, W., Xiao, Y., Xu, W., Zhou, Z. -L., Ziskin, V., and Zwart, T.

Subjects
Nuclear Experiment
Abstract

We report the measurement of the beam-vector and tensor asymmetries $A^V_{ed}$ and $A^T_d$ in quasielastic $(\vec{e}, e^{\prime}p)$ electrodisintegration of the deuteron at the MIT-Bates Linear Accelerator Center up to missing momentum of 500~MeV/c. Data were collected simultaneously over a momentum transfer range $0.1< Q^2<0.5$~(GeV/c)$^2$ with the Bates Large Acceptance Spectrometer Toroid using an internal deuterium gas target, polarized sequentially in both vector and tensor states. The data are compared with calculations. The beam-vector asymmetry $A^V_{ed}$ is found to be directly sensitive to the $D$-wave component of the deuteron and have a zero-crossing at a missing momentum of about 320~MeV/c, as predicted. The tensor asymmetry $A^T_d$ at large missing momentum is found to be dominated by the influence of the tensor force in the neutron-proton final-state interaction. The new data provide a strong constraint on theoretical models., Comment: 5 pages, 3 figures

Published
2017
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2. The Role of Mesons in the Electromagnetic Form Factors of the Nucleon

Author

Crawford, C., Akdogan, T., Alarcon, R., Bertozzi, W., Booth, E., Botto, T., Calarco, J. R., Clasie, B., DeGrush, A., Donnelly, T. W., Dow, K., Farkhondeh, M., Fatemi, R., Filoti, O., Franklin, W., Gao, H., Geis, E., Gilad, S., Hasell, D., Karpius, P., Kohl, M., Kolster, H., Lee, T., Lomon, E., Maschinot, A., Matthews, J., McIlhany, K., Meitanis, N., Milner, R., Rapaport, J., Redwine, R., Seely, J., Shinozaki, A., Sindile, A., Sirca, S., Six, E., Smith, T., Tonguc, B., Tschalaer, C., Tsentalovich, E., Turchinetz, W., Xiao, Y., Xu, W., Zhang, C., Zhou, Z., Ziskin, V., and Zwart, T.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

The roles played by mesons in the electromagnetic form factors of the nucleon are explored using as a basis a model containing vector mesons with coupling to the continuum together with the asymptotic $Q^2$ behavior of perturbative QCD. Specifically, the vector dominance model (GKex) developed by Lomon is employed, as it is known to be very successful in representing the existing high-quality data published to date. An analysis is made of the experimental uncertainties present when the differences between the GKex model and the data are expanded in orthonormal basis functions. A main motivation for the present study is to provide insight into how the various ingredients in this model yield the measured behavior, including discussions of when dipole form factors are to be expected or not, of which mesons are the major contributors, for instance, at low-$Q^2$ or large distances, and of what effects are predicted from coupling to the continuum. Such insights are first discussed in momentum space, followed by an analysis of how different and potentially useful information emerges when both the experimental and theoretical electric form factors are Fourier transformed to coordinate space. While these Fourier transforms should not be interpreted as "charge distributions", nevertheless the roles played by the various mesons, especially which are dominant at large or small distance scales, can be explored via such experiment--theory comparisons., Comment: Resubmitted to PRC

Published
2010
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3. The Charge Form Factor of the Neutron at Low Momentum Transfer from the $^{2}\vec{\rm H}(\vec{\rm e},{\rm e}'{\rm n}){\rm p}$ Reaction

Author

Geis, E., Ziskin, V., Akdogan, T., Arenhoevel, H., Alarcon, R., Bertozzi, W., Booth, E., Botto, T., Calarco, J., Clasie, B., Crawford, C. B., DeGrush, A., Donnelly, T. W., Dow, K., Farkhondeh, M., Fatemi, R., Filoti, O., Franklin, W., Gao, H., Gilad, S., Hasell, D., Karpius, P., Kohl, M., Kolster, H., Lee, T., Maschinot, A., Matthews, J., McIlhany, K., Meitanis, N., Milner, R. G., Rapaport, J., Redwine, R. P., Seely, J., Shinozaki, A., Sirca, S., Sindile, A., Six, E., Smith, T., Steadman, M., Tonguc, B., Tschalaer, C., Tsentalovich, E., Turchinetz, W., Xiao, Y., Xu, W., Zhang, C., Zhou, Z., and Zwart, T.

Subjects
Nuclear Experiment
Abstract

We report new measurements of the neutron charge form factor at low momentum transfer using quasielastic electrodisintegration of the deuteron. Longitudinally polarized electrons at an energy of 850 MeV were scattered from an isotopically pure, highly polarized deuterium gas target. The scattered electrons and coincident neutrons were measured by the Bates Large Acceptance Spectrometer Toroid (BLAST) detector. The neutron form factor ratio $G^{n}_{E}/G^{n}_{M}$ was extracted from the beam-target vector asymmetry $A_{ed}^{V}$ at four-momentum transfers $Q^{2}=0.14$, 0.20, 0.29 and 0.42 (GeV/c)$^{2}$., Comment: 5 pages, 3 figures, submitted to Phys. Rev. Lett

Published
2008
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4. Measurement of the proton electric to magnetic form factor ratio from \vec ^1H(\vec e, e'p)

Author

Crawford, C. B., Sindile, A., Akdogan, T., Alarcon, R., Bertozzi, W., Booth, E., Botto, T., Calarco, J., Clasie, B., DeGrush, A., Donnelly, T. W., Dow, K., Dutta, D., Farkhondeh, M., Fatemi, R., Filoti, O., Franklin, W., Gao, H., Geis, E., Gilad, S., Haeberli, W., Hasell, D., Hersman, W., Holtrop, M., Karpius, P., Kohl, M., Kolster, H., Lee, T., Maschinot, A., Matthews, J., McIlhany, K., Meitanis, N., Milner, R. G., Rapaport, J., Redwine, R. P., Seely, J., Shinozaki, A., Sirca, S., Six, E., Smith, T., Tonguc, B., Tschalaer, C., Tsentalovich, E., Turchinetz, W., Brand, J. F. J. van den, van der Laan, J., Wang, F., Wise, T., Xiao, Y., Xu, W., Zhang, C., Zhou, Z., Ziskin, V., and Zwart, T.

Subjects
Nuclear Experiment
Abstract

We report the first precision measurement of the proton electric to magnetic form factor ratio from spin-dependent elastic scattering of longitudinally polarized electrons from a polarized hydrogen internal gas target. The measurement was performed at the MIT-Bates South Hall Ring over a range of four-momentum transfer squared $Q^2$ from 0.15 to 0.65 (GeV/c)$^2$. Significantly improved results on the proton electric and magnetic form factors are obtained in combination with previous cross-section data on elastic electron-proton scattering in the same $Q^2$ region., Comment: 4 pages, 2 figures, submitted to PRL

Published
2006
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5. Measurements of the Generalized Electric and Magnetic Polarizabilities of the Proton at Low Q2 Using the VCS Reaction

Author

Bourgeois, P., Sato, Y., Shaw, J., Alarcon, R., Bernstein, A. M., Bertozzi, W., Botto, T., Calarco, J., Casagrande, F., Distler, M. O., Dow, K., Farkondeh, M., Georgakopoulos, S., Gilad, S., Hicks, R., Holtrop, M., Hotta, A., Jiang, X., Karabarbounis, A., Kirkpatrick, J., Kowalski, S., Milner, R., Miskimen, R., Nakagawa, I., Papanicolas, C. N., Sarty, A. J., Sirca, S., Six, E., Sparveris, N. F., Stave, S., Stiliaris, E., Tamae, T., Tsentalovich, G., Tschalaer, C., Turchinetz, W., Zhou, Z. -L., and Zwart, T.

Subjects
Nuclear Experiment
Abstract

The mean square polarizability radii of the proton have been measured for the first time in a virtual Compton scattering experiment performed at the MIT-Bates out-of-plane scattering facility. Response functions and polarizabilities obtained from a dispersion analysis of the data at Q2=0.06 GeV2/c2 are in agreement with O(p3) heavy baryon chiral perturbation theory. The data support the dominance of mesonic effects in the polarizabilities, and the increase of beta with increasing Q2 is evidence for the cancellation of long-range diamagnetism by short-range paramagnetism from the pion cloud.

Published
2006
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6. Threshold Electrodisintegration of ^3He

Author

Hicks, R. S., Hotta, A., Churchwell, S., Jiang, X., Peterson, G. A., Shaw, J., Asavapibhop, B., Berisso, M. C., Bosted, P. E., Burchesky, K., Miskimen, R. A., Rock, S. E., Nakagawa, I., Tamae, T., Suda, T., Golak, J., Skibinski, R., Witala, H., Casagrande, F., Turchinetz, W., Cichocki, A., Wang, K., Glockle, W., Kamada, H., Kobayashi, T., and Nogga, A.

Subjects
Nuclear Experiment
Abstract

Cross sections were measured for the near-threshold electrodisintegration of ^3He at momentum transfer values of q=2.4, 4.4, and 4.7 fm^{-1}. From these and prior measurements the transverse and longitudinal response functions R_T and R_L were deduced. Comparisons are made against previously published and new non-relativistic A=3 calculations using the best available NN potentials. In general, for q<2 fm^{-1} these calculations accurately predict the threshold electrodisintegration of ^3He. Agreement at increasing q demands consideration of two-body terms, but discrepancies still appear at the highest momentum transfers probed, perhaps due to the neglect of relativistic dynamics, or to the underestimation of high-momentum wave-function components., Comment: 9 pages, 7 figures, 1 table, REVTEX4, submitted to Physical Review C

Published
2003
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7. Measurement of the R$_{LT}$ response function for $\pi^0$ electroproduction at $Q^2$ = 0.070 (GeV/c)$^2$ in the $N\to\Delta$ transition}

Author

Sparveris, N., Alarcon, R., Barkhuff, D., Bernstein, A., Bertozzi, W., Calarco, J., Casagrande, F., Chen, J., Comfort, J., Distler, M., Dodson, G., Dooley, A., Dow, K., Farkondeh, M., Gilad, S., Hicks, R., Holtrop, M., Hotta, A., Jiang, X., Kaloskamis, N., Karabarbounis, A., Kowalski, S., Kunz, C., Margaziotis, D., Mertz, C., Milner, R., Miskimen, R., Nakagawa, I., Papanicolas, C., Pavan, M., Peterson, G., Ramirez, A., Rowntree, D., Sarty, A., Shaw, J., Six, E., Soong, S., Stiliaris, S., Tieger, D., Tschalaer, C., Turchinetz, W., Vellidis, C., Warren, G., Young, A., Zhao, J., Zhou, Z., and Zwart, T.

Subjects
Nuclear Experiment
Abstract

Quadrupole amplitudes in the $\gamma^{*}N\to\Delta$ transition are associated with the issue of nucleon deformation. A search for these small amplitudes has been the focus of a series of measurements undertaken at Bates/MIT by the OOPS collaboration. We report on results from H$(e,e^\prime p)\pi^0$ data obtained at $Q^2= 0.070$ (GeV/c)$^2$ and invariant mass of W=1155 MeV using the out-of-plane detection technique with the OOPS spectrometers. The $\sigma_{LT}$ and $\sigma_{T}+\epsilon\cdot$ $\sigma_{L}$ response functions were isolated. These results, along with those of previous measurements at $W$=1172 MeV and $Q^2= 0.127$ (GeV/c)$^2$, aim in elucidating the interplay between resonant and non resonant amplitudes.

Published
2002
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8. Search for Quadrupole Strength in the Electro-excitation of the Delta(1232)

Author

Mertz, C., Vellidis, C., Alarcon, R., Barkhuff, D. H., Bernstein, A. M., Bertozzi, W., Burkert, V., Chen, J., Comfort, J. R., Dodson, G., Dolfini, S., Dow, K., Farkhondeh, M., Finn, J. M., Gilad, S., Gothe, R. W., Jiang, X., Joo, K., Kaloskamis, N. I., Karabarbounis, A., Kelly, J. J., Kowalski, S., Kunz, C., Lourie, R. W., McIntyre, J. I., Milbrath, B. D., Miskimen, R., Mitchell, J. H., Papanicolas, C. N., Perdrisat, C. F., Sarty, A. J., Shaw, J., Soong, S. -B., Tieger, D., Tschalaer, C., Turchinetz, W., Ulmer, P. E., Van Verst, S., Warren, G. A., Weinstein, L. B., Williamson, S., Woo, R. J., and Young, A.

Subjects
Nuclear Experiment
Abstract

High-precision H(e,e'p)pi0 measurements at Q2=0.126 (GeV/c)2 are reported, which allow the determination of quadrupole amplitudes in the gamma* N->Delta transition; they simultaneously test the reliability of electroproduction models. The derived quadrupole-to-dipole amplitude ratios, Rsm=(-6.5 +- 0.2{stat+sys} +- 2.5{mod}) % and Rem=(-2.1 +- 0.2{stat+sys} +- 2.0{mod}) %, are dominated by model error. Previous Rsm and Rem results should be reconsidered after the model uncertainties associated with the method of their extraction are taken into account., Comment: 5 pages LATEX, 2 figures; resubmitted to Phys. Rev. Lett

Published
1999
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9. A Comparison of Polarization Observables in Electron Scattering from the Proton and Deuteron

Author

Milbrath, B. D., McIntyre, J. I., Armstrong, C. S., Barkhuff, D. H., Bertozzi, W., Dale, D., Dodson, G., Dow, K. A., Epstein, M. B., Farkhondeh, M., Finn, J. M., Gilad, S., Jones, M. K., Joo, K., Kelly, J. J., Kowalski, S., Lourie, R. W., Madey, R., Margaziotis, D. J., Markowitz, P., Mertz, C., Mitchell, J., Perdrisat, C. F., Punjabi, V., Qin, L., Rutt, P. M., Sarty, A. J., Tieger, D., Tschalaer, C., Turchinetz, W., Ulmer, P. E., Van Verst, S. P., Warren, G. A., Weinstein, L. B., and Woo, R. J.

Subjects
Nuclear Experiment
Abstract

Recoil proton polarization observables were measured for both the p($\vec {\rm e}$,e$^\prime\vec{\rm p}\,$) and d($\vec {\rm e}$,e$^\prime\vec{\rm p}\,)$n reactions at two values of Q$^2$ using a newly commissioned proton Focal Plane Polarimeter at the M.I.T.-Bates Linear Accelerator Center. The hydrogen and deuterium spin-dependent observables $D_{\ell\ell}$ and $D_{{\ell}t}$, the induced polarization $P_n$ and the form factor ratio $G^p_E/G^p_M$ were measured under identical kinematics. The deuterium and hydrogen results are in good agreement with each other and with the plane-wave impulse approximation (PWIA)., Comment: 9 pages, 1 figure; accepted by Phys. Rev. Lett

Published
1997
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10. Measurement of the Induced Proton Polarization P_n in the 12C(e,e'\vec{p}) Reaction

Author

Woo, R. J., Barkhuff, D. H., Bertozzi, W., Dale, D., Dodson, G., Dow, K. A., Epstein, M. B., Farkhondeh, M., Finn, J. M., Gilad, S., Jones, M. K., Joo, K., Kelly, J. J., Kowalski, S., Lourie, R. W., Madey, R., Margaziotis, D. J., Markowitz, P., McIntyre, J. I., Mertz, C., Milbrath, B. D., Mitchell, J., Perdrisat, C. F., Punjabi, V., Rutt, P. M., Sarty, A. J., Tieger, D., Tschalaer, C., Turchinetz, W., Ulmer, P. E., Vellidis, C., Van Verst, S. P., Warren, G. A., and Weinstein, L.

Subjects
Nuclear Experiment
Abstract

The first measurements of the induced proton polarization, P_n, for the 12C (e,e'\vec{p}) reaction are reported. The experiment was performed at quasifree kinematics for energy and momentum transfer (\omega,q) \approx (294 MeV, 756 MeV/c) and sampled a recoil momentum range of 0-250 MeV/c. The induced polarization arises from final-state interactions and for these kinematics is dominated by the real part of the spin-orbit optical potential. The distorted-wave impulse approximation provides good agreement with data for the 1p_{3/2} shell. The data for the continuum suggest that both the 1s_{1/2} shell and underlying l > 1 configurations contribute., Comment: 5 pages LaTeX, 2 postscript figures, accepted by Physical Reveiw Letters

Published
1997
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11. A Measurement of the Interference Structure Function, R_LT, for the 12C(e,e'p) reaction in the Quasielastic Region

Author

Holtrop, M., Jordan, D., McIlvain, T., Alarcon, R., Beck, R., Bertozzi, W., Bhushan, V., Boeglin, W., Chen, J. P., Dale, D., Dodson, G., Dolfini, S., Dow, K., Dzengeleski, J., Epstein, M. B., Farkhondeh, M., Gilad, S., Gorgen, J., Joo, K., Kelsey, J., Kim, W., Laszewski, R., Lourie, R., Mandeville, J., Margaziotis, D., Martinez, D., Miskimen, R., Papanicolas, C., Penn, S., Sapp, W., Sarty, A. J., Tieger, D., Tschalaer, C., Turchinetz, W., Warren, G., Weinstein, L., and Williamson, S.

Subjects
Nuclear Experiment
Abstract

The coincidence cross-section and the interference structure function, R_LT, were measured for the 12C(e,e'p) 11B reaction at quasielastic kinematics and central momentum transfer of q=400 MeV/c. The measurement was at an opening angle of theta_pq=11 degrees, covering a range in missing energy of E_m = 0 to 65 MeV. The R_LT structure function is found to be consistent with zero for E_m > 50 MeV, confirming an earlier study which indicated that R_L vanishes in this region. The integrated strengths of the p- and s-shell are compared with a Distorted Wave Impulse Approximation calculation. The s-shell strength and shape are compared with a Hartree Fock-Random Phase Approximation calculation. The DWIA calculation overestimates the cross sections for p- and s-shell proton knockout as expected, but surprisingly agrees with the extracted R_LT value for both shells. The HF-RPA calculation describes the data more consistently, which may be due to the inclusion of 2-body currents in this calculation., Comment: 8 Pages LaTex, 5 postscript figures. Submitted to Phys. Rev. C

Published
1997
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12. Trinucleon Threshold Electrodisintegration

Author

Retzlaff, G. A., Caplan, H. S., Hallin, E. L., Skopik, D. M., Beck, D., Blomqvist, K. I., Dodson, G., Dow, K., Farkhondeh, M., Flanz, J., Kowalski, S., Sapp, W. W., Sargent, C. P., Tieger, D., Turchinetz, W., Williamson, C. F., Dodge, W., Maruyama, X K., Lightbody, J. W., Jr., Goloskie, R., McCarthy, J., Ueng, T. S., Whitney, R. R., Quinn, B., Dytman, S., Von Reden, K., Schiavilla, R., Tjon, J. A., Mitter, H., editor, Plessas, W., editor, Bakker, B. L. G., editor, and van Dantzig, R., editor

Published
1994
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13. Tensor Polarization Measurements of the Recoil Deuterons in Elastic Electron-Deuteron Scattering

Author

The, I., Arvieux, J., Beck, D. H., Beise, E. J., Boudard, A., Cairns, E. B., Cameron, J. M., Dodson, G. W., Dow, K. A., Farkhondeh, M., Fielding, H. W., Flanz, J. B., Garçon, M., Goloskie, R., Høibråten, S., Jourdan, J., Kowalski, S., Lapointe, C., McDonald, W. J., Ni, B., Pham, L. D., Redwine, R. P., Rodning, N. L., Roy, G., Schulze, M. E., Souder, P. A., Soukup, J., Turchinetz, W. E., Williamson, C. F., Wilson, K. E., Wood, S. A., Ziegler, W., Wissink, Scott W., editor, Goodman, Charles D., editor, and Walker, George E., editor

Published
1991
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14. The BLAST experiment

Author

Hasell, D., Akdogan, T., Alarcon, R., Bertozzi, W., Booth, E., Botto, T., Calarco, J.R., Clasie, B., Crawford, C., DeGrush, A., Dow, K., Dutta, D., Farkhondeh, M., Fatemi, R., Filoti, O., Franklin, W., Gao, H., Geis, E., Gilad, S., Hersman, W., Holtrop, M., Ihloff, E., Karpius, P., Kelsey, J., Kohl, M., Kolster, H., Krause, S., Lee, T., Maschinot, A., Matthews, J., McIlhany, K., Meitanis, N., Milner, R., Rapaport, J., Redwine, R., Seely, J., Shinozaki, A., Sindile, A., Širca, S., Smith, T., Sobczynski, S., Tanguay, M., Tonguc, B., Tschalaer, C., Tsentalovich, E., Turchinetz, W., van den Brand, J.F.J., van der Laan, J., Wang, F., Wise, T., Xiao, Y., Xu, W., Zhang, C., Zhou, Z., Ziskin, V., and Zwart, T.

Published
2009
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15. Phenomenology of the deuteron electromagnetic form factors

Author

Abbott, D., Ahmidouch, A., Anklin, H., Arvieux, J., Ball, J., Beedoe, S., Beise, E.J., Bimbot, L., Boeglin, W., Breuer, H., Carlini, R., Chant, N.S., Danagoulian, S., Dow, K., Ducret, J.-E., Dunne, J., Ewell, L., Eyraud, L., Furget, C., Garçcon, M., Gilman, R., Glashausser, C., Gueye, P., Gustafsson, K., Hafidi, K., Honegger, A., Jourdan, J., Kox, S., Kumbartzki, G., Lu, L., Lung, A., Markowitz, P., McIntyre, J., Meekins, D., Merchez, F., Mitchell, J., Mohring, R., Mtingwa, S., Mrktchyan, H., Pitz, D., Qin, L., Ransome, R., Réal, J.-S., Roos, P.G., Rutt, P., Sawafta, R., Stepanyan, S., Tieulent, R., Tomasi-Gustafsson, E., Turchinetz, W., Vansyoc, K., Volmer, J., Voutier, E., Williamson, C., Wood, S.A., Yan, C., Zhao, J., and Zhao, W.

Published
2000
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16. Trinucleon Threshold Electrodisintegration

Author

Retzlaff, G. A., primary, Caplan, H. S., additional, Hallin, E. L., additional, Skopik, D. M., additional, Beck, D., additional, Blomqvist, K. I., additional, Dodson, G., additional, Dow, K., additional, Farkhondeh, M., additional, Flanz, J., additional, Kowalski, S., additional, Sapp, W. W., additional, Sargent, C. P., additional, Tieger, D., additional, Turchinetz, W., additional, Williamson, C. F., additional, Dodge, W., additional, Maruyama, X K., additional, Lightbody, J. W., additional, Goloskie, R., additional, McCarthy, J., additional, Ueng, T. S., additional, Whitney, R. R., additional, Quinn, B., additional, Dytman, S., additional, Von Reden, K., additional, Schiavilla, R., additional, and Tjon, J. A., additional

Published
1994
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17. Performance of a compact detector package for the out-of-plane spectrometer system

Author

Zhou, Z.-L., Širca, S., Boeglin, W., Sarty, A.J., Alarcon, R., Beck, R., Bernstein, A., Bertozzi, W., Botto, T., Bourgeois, P., Calarco, J., Casagrande, F., Chen, J., Comfort, J.R., Dale, D., Distler, M.O., Dodson, G., Dolfini, S., Dooley, A., Dow, K., Epstein, M., Farkhondeh, M., Georgakopoulos, S., Gilad, S., Hicks, R., Holtrop, M., Hotta, A., Jiang, X., Joo, K., Jordan, D., Kaloskamis, N., Karabarbounis, A., Kirkpatrick, J., Kowalski, S., Kunz, C., Liyanage, N., Mandeville, J., Margaziotis, D.J., McIlvain, T., Mertz, C., Milner, R., Miskimen, R., Nakagawa, I., Papanicolas, C.N., Pavan, M., Peterson, G., Ramirez, A., Rowntree, D., Sato, Y., Shaw, J., Six, E., Sobczynski, S., Soong, S.-B., Sparveris, N., Stave, S., Stiliaris, S., Tamae, T., Tieger, D., Tschalær, C., Tsentalovich, G., Turchinetz, W., Vellidis, C., Warren, G.A., Weinstein, L.B., Williamson, S.E., Young, A., Zhao, J., and Zwart, T.

Published
2002
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18. Measurement of the Vector and Tensor Asymmetries at Large Missing Momentum in Quasielastic ([→ over e],e′p) Electron Scattering from Deuterium

Author

Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. Laboratory for Nuclear Science, DeGrush, Adam Jon, Maschinot, Aaron Joseph, Akdogan, Taylan, Bertozzi, William, Botto, Tancredi, Clasie, Benjamin, Dow, Karen Ann, Farkhondeh, Manouchehr, Franklin, Wilbur A, Gilad, Shalev, Hasell, Douglas K, Kolster, Hauke, Matthews, June L, Meitanis, Nikolas C, Milner, Richard G, Redwine, Robert P, Seely, J., Shinozaki, Akihisa, Tschalaer, Christoph, Tsentalovich, Evgeni P, Xiao, Y., Zhou, Z.-L., Ziskin, Vitaliy, Zwart, Gert-Jan, Alarcon, R., Booth, E., Calarco, J. R., Crawford, C., Fatemi, R., Filoti, O., Gao, H., Geis, E., Karpius, P., Kohl, M., Lee, T., McIlhany, K., Rapaport, J., Sindile, A., Širca, S., Six, E., Smith, T., Tonguc, B., Turchinetz, W., Xu, W., Clasie, Benjamin Michael Patrick, Hasell, Douglas K., Matthews, June L., Tschalar, Christoph, Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. Laboratory for Nuclear Science, DeGrush, Adam Jon, Maschinot, Aaron Joseph, Akdogan, Taylan, Bertozzi, William, Botto, Tancredi, Clasie, Benjamin, Dow, Karen Ann, Farkhondeh, Manouchehr, Franklin, Wilbur A, Gilad, Shalev, Hasell, Douglas K, Kolster, Hauke, Matthews, June L, Meitanis, Nikolas C, Milner, Richard G, Redwine, Robert P, Seely, J., Shinozaki, Akihisa, Tschalaer, Christoph, Tsentalovich, Evgeni P, Xiao, Y., Zhou, Z.-L., Ziskin, Vitaliy, Zwart, Gert-Jan, Alarcon, R., Booth, E., Calarco, J. R., Crawford, C., Fatemi, R., Filoti, O., Gao, H., Geis, E., Karpius, P., Kohl, M., Lee, T., McIlhany, K., Rapaport, J., Sindile, A., Širca, S., Six, E., Smith, T., Tonguc, B., Turchinetz, W., Xu, W., Clasie, Benjamin Michael Patrick, Hasell, Douglas K., Matthews, June L., and Tschalar, Christoph

Abstract

We report the measurement of the beam-vector and tensor asymmetries A[subscript ed][superscript V] and A[subscript d][superscript T] in quasielastic ([→ over e],e′p) electrodisintegration of the deuteron at the MIT-Bates Linear Accelerator Center up to missing momentum of 500 MeV/c. Data were collected simultaneously over a momentum transfer range 0.1

Published
2018

19. Tensor polarization in elastic electron-deuteron scattering to the highest possible momentum transfers

Author

Garçon, M., Abbott, D., Ahmidouch, A., Anklin, H., Arvieux, J., Ball, J., Beedoe, S., Beise, E.J., Bimbot, L., Boeglin, W., Breuer, H., Carlini, R., Chant, N.S., Danagoulian, S., Dow, K., Ducret, J.-E., Dunne, J., Ewell, L., Eyraud, L., Furget, C., Gilman, R., Glashausser, C., Gueye, P., Gustafsson, K., Hafidi, K., Honegger, A., Jourdan, J., Kox, S., Kumbartzki, G., Lu, L., Lung, A., Mack, D., Markowitz, P., McIntyre, J., Meekins, D., Merchez, F., Mitchell, J., Mohring, R., Mtingwa, S., Mrktchyan, H., Pitz, D., Qin, L., Ransome, R., Réal, J.-S., Roos, P.G., Rutt, P., Schmidt, W., Sawafta, R., Stepanyan, S., Stephenson, E.J., Tieulent, R., Tomasi-Gustafsson, E., Turchinetz, W., Vansyoc, K., Volmer, J., Voutier, E., Vulcan, W., Williamson, C., Wood, S.A., Yan, C., Zhao, J., and Zhao, W.

Published
1999
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20. Measurement of recoil proton polarizations in the electrodisintegration of deuterium by polarized electrons

Author

Barkhuff, D.H., Armstrong, C.S., Bertozzi, W., Chen, J.P., Dale, D., Dodson, G., Dow, K.A., Epstein, M.B., Farkhondeh, M., Finn, J.M., Gilad, S., Jones, M.K., Joo, K., Kelly, J.J., Kowalski, S., Liu, D., Lourie, R.W., McIntyre, J.I., Madey, R., Margaziotis, D.J., Markowitz, P., Mertz, C., Milbrath, B.D., Mitchell, J., Mukhopadhyay, S., Perdrisat, C.F., Punjabi, V., Qin, L., Rutt, P.M., Sarty, A.J., Tieger, D., Tschalær, C., Turchinetz, W., Ulmer, P.E., Van Verst, S.P., Vellidis, C., Warren, G., Weinstein, L.B., and Woo, R.J.

Published
1999
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21. Threshold electrodisintegration of 3He

Author

Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA, Laboratory of Nuclear Science, Tohoku University, Sendai 982-0826, Japan, Institute of Physics, Jagellonian University, PL-30059 Kraców, Poland, MIT-Bates Linear Accelerator Center, Middleton, Massachusetts 01949, USA, Department of Physics, University of Virginia, Charlottesville, Virginia 22901, USA, Institut für Theoretische Physik II, Ruhr Universität Bochum, D-44780 Bochum, Germany, Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, 1-1 Sensuicho, Tobata, Kitakyushu 804-8550, Japan, College of Radiology, Teikyo University, Tokyo 173-8605, Japan, Department of Physics, University of Arizona, Tucson, Arizona 85721, USA, Hicks, R.S., Hotta, A, Churchwell, S, Jiang, X, Peterson, G.A, Shaw, J, Asavapibhop, B, Berisso, M.C., Bosted, P.E., Burchesky, P.E, Miskimen, R.A, Rock, S.E, Nakagawa, I, Tamae, T, Suda, T, Golak, J, Skibinski, R, Witala, H, Casagrande, F, Turchinetz, W, Cichocki, A, Wang, K, Glockle, W, Kamada, Hiroyuki, Kobayashi, T, Nogga, A, Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA, Laboratory of Nuclear Science, Tohoku University, Sendai 982-0826, Japan, Institute of Physics, Jagellonian University, PL-30059 Kraców, Poland, MIT-Bates Linear Accelerator Center, Middleton, Massachusetts 01949, USA, Department of Physics, University of Virginia, Charlottesville, Virginia 22901, USA, Institut für Theoretische Physik II, Ruhr Universität Bochum, D-44780 Bochum, Germany, Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, 1-1 Sensuicho, Tobata, Kitakyushu 804-8550, Japan, College of Radiology, Teikyo University, Tokyo 173-8605, Japan, Department of Physics, University of Arizona, Tucson, Arizona 85721, USA, Hicks, R.S., Hotta, A, Churchwell, S, Jiang, X, Peterson, G.A, Shaw, J, Asavapibhop, B, Berisso, M.C., Bosted, P.E., Burchesky, P.E, Miskimen, R.A, Rock, S.E, Nakagawa, I, Tamae, T, Suda, T, Golak, J, Skibinski, R, Witala, H, Casagrande, F, Turchinetz, W, Cichocki, A, Wang, K, Glockle, W, Kamada, Hiroyuki, Kobayashi, T, and Nogga, A

Abstract

type:Journal Article, Cross sections were measured for the near-threshold electrodisintegration of 3He at momentum transfer values of q=2.4, 4.4, and 4.7 fm-1. From these and prior measurements the transverse and longitudinal response functions RT and RL were deduced. Comparisons are made against previously published and new nonrelativistic A=3 calculations using the best available nucleon-nucleon NN potentials. In general, for q<2 fm-1 these calculations accurately predict the threshold electrodisintegration of 3He. Agreement at increasing q demands consideration of two-body terms, but discrepancies still appear at the highest momentum transfers probed, perhaps due to the neglect of relativistic dynamics, or to the underestimation of high-momentum wave-function components., source:http://link.aps.org/abstract/PRC/v67/e064004, source:http://www.aps.org

Published
2017

24. A Status Report on the 't20' Experiment at Bates: Toward a Separation of the Charge and Quadrupole Form Factors of the Deuteron

Author

Garçon, M., Antonuk, L., Arvieux, J., Beck, D., Beise, E., Boudard, A., Cairns, E. B., Cameron, J. M., Dodson, G., Dow, K., Farkhondeh, M., Fielding, H. W., Goloskie, R., Høibråten, S., Jourdan, J., Kowalski, S., Lapointe, C., McDonald, W. J., Pham, D., Redwine, R., Rodning, N., Roy, G., Schulze, M. E., Souder, P. A., Soukup, J., The, I., Turchinetz, W., Williamson, C. F., Wilson, K., Wood, S., Ziegler, W., Horowitz, Charles J., editor, Goodman, Charles D., editor, and Walker, George E., editor

Published
1988
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26. An RF Resonance Polarimeter Phase 1 Proof-of-Principle Experiment

Author

Cameron, P., primary, Barry, W. C., additional, Blaskiewicz, M. M., additional, Connolly, R., additional, Conte, M., additional, Corlett, J. N., additional, Derbenev, Ya. S., additional, Goldberg, D. A., additional, Jacobs, K., additional, Kowalski, S., additional, Luccio, A. U., additional, MacKay, W. W., additional, Matthews, J., additional, Ptitsyn, V., additional, Parodi, R., additional, Rimmer, R. A., additional, Shea, T. J., additional, Syphers, M. J., additional, Tschaller, C., additional, Tsoupas, N., additional, Turchinetz, W., additional, Zolfaghari, A., additional, and Zwart, T., additional

Published
1997
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27. Measurement of the partial cross sections σtT, σlT, and (σT+ σl) of the 1H(e,e′π+)n reaction in the Δ(1232) resonance

Author

Kirkpatrick, J.M. Sparveris, N.F. Nakagawa, I. Bernstein, A.M. Alarcon, R. Bertozzi, W. Botto, T. Bourgeois, P. Calarco, J. Casagrande, F. Distler, M.O. Dow, K. Farkondeh, M. Georgakopoulos, S. Gilad, S. Hicks, R. Holtrop, A. Hotta, A. Jiang, X. Karabarbounis, A. Kowalski, S. Milner, R. Miskimen, R. Papanicolas, C.N. Sarty, A.J. Sato, Y. Širca, S. Shaw, J. Six, E. Stave, S. Stiliaris, E. Tamae, T. Tsentalivich, G. Tschalaer, C. Turchinetz, W. Zhou, Z.-L. Zwart, T.

Subjects
Nuclear Experiment
Abstract

We report precision 1H(e,e′π+)n measurements in the Δ(1232) resonance at Q2=0.127(GeV/c)2 obtained at the MIT-Bates out-of-plane scattering facility. These are the lowest, but nonzero, Q2 measurements in the π+ channel. The data offer tests of the theoretical calculations, particularly of the background amplitude contributions. The chiral effective field theory and Sato-Lee model calculations are not in agreement with this experiment. © 2011 American Physical Society.

Published
2011

28. Measurements of the generalized electric and magnetic polarizabilities of the proton at low Q2 using the virtual Compton scattering reaction

Author

Bourgeois, P. Sato, Y. Shaw, J. Alarcon, R. Bernstein, A.M. Bertozzi, W. Botto, T. Calarco, J. Casagrande, F. Distler, M.O. Dow, K. Farkondeh, M. Georgakopoulos, S. Gilad, S. Hicks, R. Holtrop, M. Hotta, A. Jiang, X. Karabarbounis, A. Kirkpatrick, J. Kowalski, S. Milner, R. Miskimen, R. Nakagawa, I. Papanicolas, C.N. Sarty, A.J. Sirca, S. Six, E. Sparveris, N.F. Stave, S. Stiliaris, E. Tamae, T. Tsentalovich, G. Tschalaer, C. Turchinetz, W. Zhou, Z.-L. Zwart, T.

Subjects
Nuclear Experiment
Abstract

Experimental details of a virtual Compton scattering (VCS) experiment performed on the proton at the MIT-Bates out-of-plane scattering facility are presented. The VCS response functions PLL-PTT/P TT and PLT have been measured at Q2=0.057GeV2/c2. The generalized electric and magnetic polarizabilities, α(Q2) and β(Q2), and the mean-square electric polarizability radius rα2 are obtained from a dispersion analysis of the data. The results are in good agreement with O(p3) heavy baryon chiral perturbation and indicate the dominance of mesonic effects in the polarizabilities. © 2011 American Physical Society.

Published
2011

31. Measurements of the generalized electric and magnetic polarizabilities of the proton at low Q(2) using the virtual-compton-scattering reaction

Author

Bourgeois, P. Sato, Y. Shaw, J. Alarcon, R. Bernstein, A. M. Bertozzi, W. Botto, T. Calarco, J. Casagrande, F. and Distler, M. O. Dow, K. Farkondeh, M. Georgakopoulos, S. and Gilad, S. Hicks, R. Holtrop, M. Hotta, A. Jiang, X. and Karabarbounis, A. Kirkpatrick, J. Kowalski, S. Milner, R. Miskimen, R. Nakagawa, I. Papanicolas, C. N. Sarty, A. J. Sirca, S. Six, E. Sparveris, N. F. Stave, S. and Stiliaris, E. Tamae, T. Tsentalovich, G. Tschalaer, C. and Turchinetz, W. Zhou, Z. -L. Zwart, T.

Subjects
High Energy Physics::Phenomenology, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The mean square polarizability radii of the proton have been measured for the first time in a virtual-Compton-scattering experiment performed at the MIT-Bates out-of-plane scattering facility. Response functions and polarizabilities obtained from a dispersion analysis of the data at Q(2)=0.057 GeV2/c(2) are in agreement with O(p(3)) heavy baryon chiral perturbation theory. The data support the dominance of mesonic effects in the polarizabilities.

Published
2006

32. Investigation of the conjectured nucleon deformation at low momentum transfer

Author

Sparveris, NF Alarcon, R Bernstein, AM Bertozzi, W and Botto, T Bourgeois, P Calarco, J Casagrande, F Distler, MO Dow, K Farkondeh, M Georgakopoulos, S Gilad, S and Hicks, R Holtrop, M Hotta, A Jiang, X Karabarbounis, A and Kirkpatrick, J Kowalski, S Milner, R Miskimen, R and Nakagawa, I Papanicolas, CN Sarty, AJ Sato, Y Sirca, S and Shaw, J Six, E Stave, S Stiliaris, E Tamae, T and Tsentalovich, G Tschalaer, C Turchinetz, W Zhou, ZL and Zwart, T

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

We report new precise H(e,e(’)p)pi(0) measurements at the Delta(1232) resonance at Q(2)=0.127 (GeV/c)(2) obtained at the MIT-Bates out-of-plane scattering facility which are particularly sensitive to the transverse electric amplitude (E2) of the gamma(*)N–>Delta transition. The new data have been analyzed together with those of earlier measurements to yield precise quadrupole to dipole amplitude ratios: Re(E-1+(3/2)/M-1+(3/2))=(-2.3+/-0.3(stat+syst)+/-0.6(model))% and Re(S-1+(3/2)/M-1+(3/2))=(-6.1+/-0.2(stat+syst)+/-0.5(model))% for M-1+(3/2)=(41.4+/-0.3(stat+syst)+/-0.4(model))(10(-3)/m(pi)(+)). The derived amplitudes give credence to the conjecture of deformation in hadrons favoring, at low Q(2), the dominance of mesonic effects.

Published
2005

33. Threshold Electrodisintegration of ^3He

Author

Hicks, R.S., Hotta, A, Churchwell, S, Jiang, X, Peterson, G.A, Shaw, J, Asavapibhop, B, Berisso, M.C., Bosted, P.E., Burchesky, P.E, Miskimen, R.A, Rock, S.E, Nakagawa, I, Tamae, T, Suda, T, Golak, J, Skibinski, R, Witala, H, Casagrande, F, Turchinetz, W, Cichocki, A, Wang, K, Glockle, W, Kamada, Hiroyuki, Kobayashi, T, and Nogga, A

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

Cross sections were measured for the near-threshold electrodisintegration of ^3He at momentum transfer values of q=2.4, 4.4, and 4.7 fm^{-1}. From these and prior measurements the transverse and longitudinal response functions R_T and R_L were deduced. Comparisons are made against previously published and new non-relativistic A=3 calculations using the best available NN potentials. In general, for q, 9 pages, 7 figures, 1 table, REVTEX4, submitted to Physical Review C

Published
2003
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34. Measurement of the transverse-longitudinal cross sections in the p(e,→ ép)π0 reaction in the Δ region

Author

Kunz, C. Kaloskamis, N.I. Distler, M.O. Zhou, Z.-L. Alarcon, R. Barkhuff, D. Bernstein, A.M. Bertozzi, W. Calarco, J. Casagrande, F. Chen, J. Comfort, J. Dodson, G. Dooley, A. Dow, K. Farkhondeh, M. Georgakopoulos, S. Gilad, S. Hicks, R. Hotta, A. Jiang, X. Karabarbounis, A. Kowalski, S. Margaziotis, D.J. Mertz, C. Miskimen, R. Nakagawa, I. Papanicolas, C.N. Pavan, M.M. Peterson, G. Ramirez, A. Rowntree, D. Sarty, A.J. Shaw, J. Six, E. Sparveris, N. Soong, S.-B. Stiliaris, S. Tamae, T. Tieger, D. Tschalaer, C. Tsentalovich, G. Turchinetz, W. Vellidis, C.E. Warren, G.A. Williamson, S. Young, A. Zhao, J. Zwart, T.

Subjects
Nuclear Experiment
Abstract

Accurate measurements of the p(→e, e′p)π0 reaction were performed at Q2 = 0.127 (GeV/c)2 in the A resonance energy region. The experiments at the MIT-Bates Linear Accelerator used an 820 MeV polarized electron beam with the out-of-plane magnetic spectrometer system (OOPS). In this Letter we report the first simultaneous determination of both the TL and TL′ ("fifth" or polarized) cross sections at low Q2 where the pion cloud contribution is predicted to dominate the quadrupole amplitudes (E2 and C2). These are the real and imaginary parts of the transverse-longitudinal interference amplitudes and provide a sensitive determination of the Coulomb quadrupole amplitude and a test of reaction calculations. Comparisons with model calculations are presented. The empirical MAID calculation gives the best overall agreement with this accurate data. The parameters of this model for the values of the resonant multipoles are [M1+(I = 3/2)| = (40.9 ± 0.3) × 10-3/mπ, CMR = C2/M1 = -6.5 ± 0.3%, EMR = E2/M1 = -2.2 ± 0.9%, where the errors are due to the experimental uncertainties. © 2003 Elsevier Science B.V. All rights reserved.

Published
2003

35. Measurement of the [Formula Presented] response function for [Formula Presented] electroproduction at [Formula Presented] in the [Formula Presented] transition

Author

Sparveris, N.F. Alarcon, R. Barkhuff, D. Bernstein, A. Bertozzi, W. Calarco, J. Casagrande, F. Chen, J. Comfort, J. Distler, M.O. Dodson, G. Dolfini, S. Dooley, A. Dow, K. Farkondeh, M. Gilad, S. Hicks, R. Holtrop, M. Hotta, A. Jiang, X. Kaloskamis, N. Karabarbounis, A. Kowalski, S. Kunz, C. Margaziotis, D. Mertz, C. Milner, R. Miskimen, R. Nakagawa, I. Papanicolas, C.N. Pavan, M.M. Peterson, G. Ramirez, A. Rowntree, D. Sarty, A.J. Shaw, J. Six, E. Soong, S. Stiliaris, E. Tieger, D. Tschalaer, C. Turchinetz, W. Vellidis, C. Warren, G.A. Young, A. Zhao, J. Zhou, Z.-L. Zwart, T.

Subjects
Nuclear Experiment
Abstract

Quadrupole amplitudes in the [Formula Presented] transition are associated with the issue of nucleon deformation. A search for these small amplitudes has been the focus of a series of measurements undertaken at Bates/MIT by the OOPS Collaboration. We report on results from [Formula Presented] data obtained at [Formula Presented] and invariant mass of [Formula Presented] using the out-of-plane detection technique with the OOPS spectrometers. The [Formula Presented] and [Formula Presented] response functions were isolated. These results, along with those of previous measurements at [Formula Presented] and [Formula Presented] aim in elucidating the interplay between resonant and nonresonant amplitudes. © 2003 The American Physical Society.

Published
2003

36. Performance of a compact detector package for the out-of-plane spectrometer system

Author

Zhou, Z.-L. Širca, S. Boeglin, W. Sarty, A.J. Alarcon, R. Beck, R. Bernstein, A. Bertozzi, W. Botto, T. Bourgeois, P. Calarco, J. Casagrande, F. Chen, J. Comfort, J.R. Dale, D. Distler, M.O. Dodson, G. Dolfini, S. Dooley, A. Dow, K. Epstein, M. Farkhondeh, M. Georgakopoulos, S. Gilad, S. Hicks, R. Holtrop, M. Hotta, A. Jiang, X. Joo, K. Jordan, D. Kaloskamis, N. Karabarbounis, A. Kirkpatrick, J. Kowalski, S. Kunz, C. Liyanage, N. Mandeville, J. Margaziotis, D.J. McIlvain, T. Mertz, C. Milner, R. Miskimen, R. Nakagawa, I. Papanicolas, C.N. Pavan, M. Peterson, G. Ramirez, A. Rowntree, D. Sato, Y. Shaw, J. Six, E. Sobczynski, S. Soong, S.-B. Sparveris, N. Stave, S. Stiliaris, S. Tamae, T. Tieger, D. Tschalar, C. Tsentalovich, G. Turchinetz, W. Vellidis, C. Warren, G.A. Weinstein, L.B. Williamson, S.E. Young, A. Zhao, J. Zwart, T.

Subjects
Nuclear Experiment
Abstract

We report on the design and performance of compact detector packages currently installed in the four magnetic out-of-plane spectrometers for electron scattering experiments at the MIT-Bates Linear Accelerator Center. The detector packages have been designed to meet the mechanical requirements arising from out-of-plane particle detection. They offer good trajectory and momentum reconstruction, particle identification and time-of-flight measurements for electrons, pions, protons, and deuterons with large momentum bites and in broad kinematical ranges and high luminosities. The detectors have so far been used with great success in out-of-plane measurements of 12C(e→,e′p), 2H(e→,e′p), virtual Compton scattering below pion threshold and in studies of the N→Δ transition in both exclusive reaction channels 1H(e→,e′p)π0 and 1H(e→,e′π+)n. © 2002 Elsevier Science B.V. All rights reserved.

Published
2002

37. Search for quadrupole strength in the electroexcitation of the Δ+ (1232)

Author

Mertz, C. Vellidis, C.E. Alarcon, R. Barkhuff, D.H. Bernstein, A.M. Bertozzi, W. Burkert, V. Chen, J. Comfort, J.R. Dodson, G. Dow, K. Farkhondeh, M. Finn, J.M. Gilad, S. Gothe, R.W. Jiang, X. Joo, K. Kaloskamis, N.I. Karabarbounis, A. Kelly, J.J. Kowalski, S. Kunz, C. Lourie, R.W. McIntyre, J.I. Milbrath, B.D. Miskimen, R. Mitchell, J.H. Papanicolas, C.N. Perdrisat, C.F. Sarty, A.J. Shaw, J. Soong, S.-B. Tieger, D. Tschalær, C. Turchinetz, W. Ulmer, P.E. Van Verst, S. Warren, G.A. Weinstein, L.B. Williamson, S. Woo, R.J. Young, A.

Abstract

High-precision 1H(e, elp)φ0 measurements at Q2 = 0.126 (GeV/c)2 are presented. It allows the determination of quadrupole amplitudes in the γ*N → △ transition, in which the reliability of electroproduction models was simultaneously tested. The derived quadrupole-to-dipole (I = 3/2) amplitude ratios, RSM = (-6.5 ± 0.2stat+sys ± 2.5mod)% and REM = (-2.1 ± 0.2stat+sys ± 2.0mod)%, are dominated by model error.

Published
2001

38. Relativistic effects and two-body currents in 2H(e→, e′p)n using out-of-plane detection

Author

Zhou, Z.-L. Chen, J. Soong, S.-B. Young, A. Jiang, X. Alarcon, R. Arenhövel, H. Bernstein, A. Bertozzi, W. Comfort, J. Dodson, G. Dolfini, S. Dooley, A. Dow, K. Farkhondeh, M. Gilad, S. Hicks, R. Hotta, A. Joo, K. Kaloskamis, N.I. Karabarbounis, A. Kowalski, S. Kunz, C. Margaziotis, D.J. Mertz, C. Miller, M. Miskimen, R. Miura, T. Miyase, H. Papanicolas, C.N. Peterson, G. Ramirez, A. Rowntree, D. Sarty, A.J. Shaw, J. Suda, T. Tamae, T. Tieger, D. Tjon, J.A. Tschalaer, C. Tsentalovich, E. Turchinetz, W. Vellidis, C.E. Warren, G.A. Weinstein, L.B. Williamson, S. Zhao, J. Zwart, T. The MIT-Bates OOPS Collaboration

Abstract

Measurements of the 2H(e→, e′p)n reaction were performed with the out-of-plane magnetic spectrometers (OOPS) at the MIT-Bates Linear Accelerator. The longitudinal-transverse, fLT and f′LT, and the transverse-transverse, fTT, interference responses at a missing momentum of 210MeV/c were simultaneously extracted in the dip region at Q2 = 0.15(GeV/c)2. In comparison to models of deuteron electrodisintegration, the data clearly reveal strong effects of relativity and final-state interactions and the importance of two-body meson-exchange currents and isobar configurations. We demonstrate that such effects can be disentangled by extracting these responses using the novel out-of-plane technique. © 2001 The American Physical Society.

Published
2001

39. Measurement of tensor polarization in elastic electron-deuteron scattering

Author

Hafidi, K., Abbott, D., Ahmidouch, A., Anklin, H., Arvieux, J., Ball, J., Beedoe, S., Beise, E.J., Bimbot, L., Boeglin, W., Breuer, H., Carlini, R., Chant, N.S., Danagulian, S., Dow, K., Ducret, J.E., Dunne, J., Ewell, L., Eyraud, L., Furget, C., Garcon, M., Gilman, R., Glashausser, C., Gueye, P., Gustafsson, K., Honegger, A., Jourdan, J., Kox, S., Kumbartzki, G., Lu, L., Lung, A., Mack, D., Markowitz, P., McIntyre, J., Meekins, D., Merchez, F., Mitchell, J., Mtingwa, S., Mkrtchian, H., Pitz, D., Qin, L., Ransome, R., Real, J.S., Roos, P.G., Rutt, P., Schmidt, W., Sawafta, R., Stepanian, S., Stephenson, E.J., Tieulent, R., Tomasi-Gustafsson, E., Turchinetz, W., Vansyoc, K., Volmer, J., Voutier, E., Vulcan, W., Williamson, C., Wood, S.A., Yan, C., Zhao, J., Zhao, W., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and JLAB t20

Subjects
scholar, university, researcher, professor, cultural studies, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], France, communication studies
Abstract

1975 is the start in France for "Communication Studies". How many people in 2001 this new discipline represents? More than 1000 permanent professors (including lecturers and adjoints), increasing each year by more than 10% since its creation. What kind of theme they work on? "General Theories" for 15%, "New Medias" for 14%, "Communicational skill" for 11%, "Organizational Communication" for 10%, "Bibliology" for 9%, etc. An incredible vivid field.

Published
1999

40. Measurement of recoil proton polarizations in the electrodisintegration of deuterium by polarized electrons

Author

Barkhuff, DH Armstrong, CS Bertozzi, W Chen, JP Dale, D and Dodson, G Dow, KA Epstein, MB Farkhondeh, M Finn, JM and Gilad, S Jones, MK Joo, K Kelly, JJ Kowalski, S and Liu, D Lourie, RW McIntyre, JI Madey, R Margaziotis, DJ and Markowitz, P Mertz, C Milbrath, BD Mitchell, J and Mukhopadhyay, S Perdrisat, CF Punjabi, V Qin, L Rutt, PM and Sarty, AJ Tieger, D Tschalaer, C Turchinetz, W and Ulmer, PE Van Verst, SP Vellidis, C Warren, G Weinstein, LB Woo, RJ

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

In order to test modem theories of two-nucleon bound and scattering states, we have measured the spin polarization of ejectile protons in the electrodisintegration reaction d((e) over right arrow, e’(p) over right arrow)n. Compared with spin-averaged observations, these observables offer the potential of enhanced sensitivity to details of the reaction process. The experiment was carried out in quasielastic kinematics (q(mu)q(mu)= -2m(p) omega= -0.38GeV(2)/c(2)). Protons were detected at two angles corresponding to neutron recoil momenta p(r) of 0 and 100MeV/c. Full nonrelativistic calculations of the polarization transfer components s(l) and s(t), including leading order relativistic contributions, describe our measurements well, but calculations of the induced polarization s(n) at p(r) = 100 MeV/c underpredict the experimental result. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

Published
1999

41. Precise measurement of the deuteron elastic structure function A(Q$^{2}$)

Author

Abbott, D., Ahmidouch, A., Anklin, H., Arvieux, J., Ball, J., Beedoe, S., Beise, E. J., Bimbot, L., Boeglin, W., Breuer, H., Carlini, R., Chant, N. S., Danagoulian, S., Dow, K., E Ducret, J., Dunne, J., Ent, R., Ewell, L., Eyraud, L., Furget, C., Garcon, M., Gilman, R., Glashausser, C., Gueye, P., Gustafsson, K., Hafidi, K., Honegger, A., Jourdan, J., Kox, S., Kumbartzki, G., Lu, L., Lung, A., Mack, D., Markowitz, P., Mcintyre, J., Meekins, D., Merchez, F., Mitchell, J., Mohring, R., Mtingwa, S., Mrktchyan, H., Pitz, D., Qin, L., Ransome, R., Real, J. S., Roos, P. G., Rutt, P., Sawafta, R., Stepanyan, S., Tieulent, R., Tomasi-Gustafsson, E., Turchinetz, W., Vansyoc, K., Volmer, J., Eric Voutier, Vulcan, W., Williamson, C., Wood, S. A., Yan, C., Zhao, J., Zhao, W., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and JLAB t20

Subjects
Nuclear Theory, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The A(Q^2) structure function in elastic electron-deuteron scattering was measured at six momentum transfers Q^2 between 0.66 and 1.80 (GeV/c)^2 in Hall C at Jefferson Laboratory. The scattered electrons and recoil deuterons were detected in coincidence, at a fixed deuteron angle of 60.5 degrees. These new precise measurements resolve discrepancies between older sets of data. They put significant constraints on existing models of the deuteron electromagnetic structure, and on the strength of isoscalar meson exchange currents., Comment: 3 LaTeX pages plus 2 PS figures

Published
1999

42. Out-of-plane measurements of the fifth response function of the exclusive electronuclear response

Author

Dolfini, SM Alarcon, RO Arenhovel, H Beck, R Bernstein, AM Bertozzi, W Boeglin, W Boffi, S Comfort, JR Dale, D Dodson, G Dow, K Epstein, MB Farkhondeh, M Gilad, S Gorgen, J Holtrop, M Jordan, D Kim, W Kowalski, S and Laszewski, R Mandeville, J Margaziotis, DJ Martinez, D and McIlvain, T Miskimen, R Papanicolas, C Radici, M and Tieger, D Turchinetz, W Vellidis, CE Weinstein, L and Williamson, S

Abstract

The first measurements of f(LT)’ known as the fifth response function, have been made for the H-2((e) over right arrow, e’p) and C-12((3) over right arrow, e’p) reactions. This response is directly related to the imaginary part of the interference between the transverse and longitudinal nuclear electromagnetic currents. Its observation requires longitudinally polarized electron beams and out-of-plane detection, the latter made possible by the newly developed out-of-plane spectrometer system. The initial measurements were made by using a 560-MeV polarized electron beam and quasielastic kinematics at Q(2) = 3.3 fm(-2). The development of the methodology for out-of-plane physics, and the analysis of the data from the initial experiments are described in detail. The measured fifth response and the related asymmetry in the coincidence cross section are in agreement, albeit with large statistical errors, with the theoretical predictions. Future extensions of the out-of-plane program are also discussed. [S0556-2813(99)02812-5].

Published
1999

43. The A(Q$^2$) deuteron structure function from the Jefferson Lab t$_20$ experiment

Author

Pitz, D., Abbott, D., Ahmidouch, A., Anklin, H., Arvieux, J., Ball, J., Beedoe, S., Beise, E. J., Bimbot, L., Boeglin, W., Breuer, H., Carlini, R., Chant, N. S., Danagoulian, S., Dow, K., Ducret, J. E., Dunne, J., Ewell, L., Eyraud, L., Furget, C., Garcon, M., Gilman, R., Glashausser, C., Gueye, P., Gustafsson, K., Hafidi, K., Honegger, A., Jourdan, J., Kox, S., Kumbartzki, G., Lu, L., Lung, A., Mack, D., Markowitz, P., Mcintyre, J., Meekins, D., Merchez, F., Mitchell, J., Mtingwa, S., Mrktchyan, H., Qin, L., Ransome, R., Real, J. S., Roos, P. G., Rutt, P., Schmidt, W., Sawafta, R., Stepanyan, S., Stephenson, E. J., Tieulent, R., Tomasi-Gustafsson, E., Turchinetz, W., Vansyoc, K., Volmer, J., Eric Voutier, Vulcan, W., Williamson, C., Wood, S. A., Yan, C., Zhao, J., Zhao, W., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Menze D.W., JLAB t20, and bibliotheque, LPSC

Subjects
[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
1998

44. Tensor polarization and cross-section measurement in elastic electron-deuteron scattering between 4.1 and 6.8 fm$^{-1}$ of momentum transfer

Author

Ducret, J. E., Abbott, D., Ahmidouch, A., Anklin, H., Arvieux, J., Ball, J., Beedoe, S., Beise, E. J., Bimbot, L., Boeglin, W., Breuer, H., Carlini, R., Chant, N. S., Danagoulian, S., Dow, K., Dunne, J., Ewell, L., Eyraud, L., Furget, C., Garcon, M., Gilman, R., Glashausser, C., Gueye, P., Gustafsson, K., Hafidi, K., Honegger, A., Jourdan, J., Kox, S., Kumbartzki, G., Lu, L., Lung, A., Mack, D., Markowitz, P., Mcintyre, J., Meekins, D., Merchez, F., Mitchell, J., Mtingwa, S., Mrktchyan, H., Pitz, D., Qin, L., Ransome, R., Real, J. S., Roos, P. G., Rutt, P., Schmidt, W., Sawafta, R., Stepanyan, S., Stephenson, E. J., Tieulent, R., Tomasi-Gustafsson, E., Turchinetz, W., Vansyoc, K., Volmer, J., Eric Voutier, Vulcan, W., Williamson, C., Wood, S. A., Yan, C., Zhao, J., Zhao, W., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Adam J., and JLAB t20

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
1998

45. Deuteron elastic form factors : opportunity for Blast ?

Author

Turchinetz, W., Ahmidouch, A., Dow, K., Williamson, C., Zhao, W., Eyraud, L., Furget, C., Kox, S., Lu, L., Merchez, F., Real, J. S., Tieulent, R., Eric Voutier, Ball, J., Ducret, J. E., Garcon, M., Hafidi, K., Pitz, D., Beise, E. J., Breuer, H., Chant, N. S., Ewell, L., Gustafsson, K., Lung, A., Mohring, R., Roos, P. G., Abbott, D., Carlini, R., Dunne, J., Gueye, P., Mack, D., Meekins, D., Mitchell, J., Qin, L., Vansyoc, K., Volmer, J., Vulcan, W., Wood, S. A., Yan, C., Gilman, R., Glashausser, C., Kumbartzki, G., Mcintyre, J., Ransome, R., Rutt, P., Honneger, A., Jourdan, J., Zhao, J., Arvieux, J., Tomasi-Gustafsson, E., Beedoe, S., Danagoulian, S., Mtingwa, S., Sawafta, R., Anklin, H., Boeglin, W., Markowitz, P., Bimbot, L., Mrktchyan, H., Stepanyan, S., Schmidt, W., Stephenson, E. J., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Alarcon R., and JLAB t20

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
1998

46. Induced proton polarization for pi(0) electroproduction at Q(2)=0.126 GeV2/c(2) around the Delta(1232) resonance

Author

Warren, GA Alarcon, R Armstrong, C Asavapibhop, B and Barkhuff, DH Bertozzi, W Burkert, V Chen, J Chen, JP and Comfort, JR Dale, D Dodson, G Dolfini, S Dow, K and Epstein, M Farkhondeh, M Finn, JM Gilad, S Gothe, RW and Jiang, X Jones, M Joo, K Karabarbounis, A Kelly, J and Kowalski, S Kunz, C Liu, D Lourie, RW Madey, R and Margaziotis, D Markowitz, P McIntyre, JI Mertz, C and Milbrath, BD Miskimen, R Mitchell, J Mukhopadhyay, S and Papanicolas, CN Perdrisat, C Punjabi, V Qin, L Rutt, P and Sarty, A Shaw, J Soong, SB Tieger, D Tschalaer, C and Turchinetz, W Ulmer, P Van Verst, S Vellidis, C and Weinstein, LB Williamson, S Woo, RJ Young, A

Abstract

We present a measurement of the induced proton polarization P-n in pi(0) electroproduction on the proton around the Delta resonance. The measurement was made at a central invariant mass and a squared four-momentum transfer of W=1231 MeV and Q(2)=0.126 GeV2/c(2), respectively. We measured a large induced polarization, P-n = -0.397 +/- 0.055 +/- 0.009. The data suggest that the scalar background is larger than expected from a recent effective Hamiltonian model. [S0556-2813(98)02012-3].

Published
1998

47. Measurement of the induced proton polarization P-n in the C-12(e,e '(p)over-right-arrow) reaction

Author

Woo, RJ Barkhuff, DH Bertozzi, W Chen, JP Dale, D and Dodson, G Dow, KA Epstein, MB Farkhondeh, M Finn, JM and Gilad, S Jones, MK Joo, K Kelly, JJ Kowalski, S and Lourie, RW Madey, R Margaziotis, DJ Markowitz, P and McIntyre, JI Mertz, C Milbrath, BD Mitchell, J and Perdrisat, CF Punjabi, V Rutt, PM Sarty, AJ Tieger, D and Tschalaer, C Turchinetz, W Ulmer, PE Van Verst, SP and Vellidis, C Warren, GA Weinstein, L

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

The first measurements of the induced proton polarization P-n for the C-12(e,e’(p) over right arrow) reaction are reported. The experiment was performed at quasifree kinematics for energy and momentum transfer (w, q) approximate to (294 MeV, 756 MeV/c) and sampled a missing momentum range of 0-250 MeV/c. The induced polarization arises from final-state interactions and for these kinematics is dominated by the real part of the spin-orbit optical potential. The distorted-wave impulse approximation provides good agreement with data fur the 1p(3/2) shelf. The data for the continuum suggest that both the 1s(1/2) shell and underlying l > 1 configurations contribute.

Published
1998

48. Final calibration of POLDER for the measurement of t$_{20}$ in e-d scattering at Jefferson Lab

Author

Arvieux, J., Ball, J., Beise, E. J., Bimbot, L., Breuer, H., Collins, G., Ducret, J. E., Eyraud, L., Furget, C., Garcon, M., Ronald Gilman, Glashausser, C., Goy, J., Hafidi, K., Kox, S., Ladygin, V., Markowitz, P., Merchez, F., Pitz, D., Real, J. S., Rutt, P., Stephenson, E., Tomasi-Gustafsson, E., Turchinetz, W., Voutier, E., Williamson, C., Zhao, W., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), De Jager C.W., Ketel T.J., and Mulders P.J.

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
1996

49. Measurement of the partial cross sectionsσTT,σLT, and(σT+ɛσL)of the1H(e,e′π+)nreaction in theΔ(1232)resonance

Author

Kirkpatrick, J. M., primary, Sparveris, N. F., additional, Nakagawa, I., additional, Bernstein, A. M., additional, Alarcon, R., additional, Bertozzi, W., additional, Botto, T., additional, Bourgeois, P., additional, Calarco, J., additional, Casagrande, F., additional, Distler, M. O., additional, Dow, K., additional, Farkondeh, M., additional, Georgakopoulos, S., additional, Gilad, S., additional, Hicks, R., additional, Holtrop, A., additional, Hotta, A., additional, Jiang, X., additional, Karabarbounis, A., additional, Kowalski, S., additional, Milner, R., additional, Miskimen, R., additional, Papanicolas, C. N., additional, Sarty, A. J., additional, Sato, Y., additional, Širca, S., additional, Shaw, J., additional, Six, E., additional, Stave, S., additional, Stiliaris, E., additional, Tamae, T., additional, Tsentalivich, G., additional, Tschalaer, C., additional, Turchinetz, W., additional, Zhou, Z.-L., additional, and Zwart, T., additional

Published
2011
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50. First measurement of the fifth structure function

Author

Mandeville, J. B., Cardman, L. S., Dolfini, S. M., Kim, W., Laszewski, R. M., Papanicolas, C. N., Williamson, S. E., Alarcon, R., Comfort, Joseph R., Gorgen, J., Martinez, D., Beck, R., Boeglin, W., Bernstein, A., Bertozzi, W., Dale, D., Dodson, G., Dow, K., Gilad, S., Holtrop, M., Jordan, D., Kowalski, S., Mcilvain, T., Tieger, D., Turchinetz, W., Boffi, S., Marco Radici, Epstein, M., Margaziotis, D., Miskimen, R., and Weinstein, L.

Subjects
Nuclear Physics
Published
1994

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