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Your search keyword '"Jacobs, W. A."' showing total 17 results
Start Over Author "Jacobs, W. A." Journal aip conference proceedings
17 results on '"Jacobs, W. A."'

1. The STAR W Spin Physics Program with [formula] Polarized pp Collisions at RHIC.

Author

Jacobs, W. W.

Subjects
*BOSONS, *PARTICLES (Nuclear physics), *COLLISIONS (Nuclear physics), *POLARIZATION (Nuclear physics), *DETECTORS
Abstract

Production of W bosons in longitudinally polarized pp collisions provides an excellent tool to probe the flavor-dependence of sea quark polarizations in the polarized proton. Current status and future plans for the W physics program with the STAR detector at RHIC are presented along with remarks concerning our knowledge of the nature and origin of the partonic sea. [ABSTRACT FROM AUTHOR]

Published
2009
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2. Precise determination of the spin-transfer coefficient K[sub NN[sup ′]] for nvector p elastic scattering at 187 MeV.

Author

Wissink, S. W., Choi, S., Franklin, W. A., Jacobs, W. W., Peterson, T., Rinckel, T., Sowinski, J., Stephenson, E. J., Wolanski, M., and Yang, H.

Subjects
ROTATIONAL motion, ELASTIC scattering
Abstract

We have measured the normal-component spin-transfer observable K[sub NN'] for ↛p elastic scattering to a precision of ±0.02 at 15 angles in the far-backward region (105° ≤ θ[sub cm] ≤ 172°) at a neutron bombarding energy of 187 MeV. This kinematic regime is of particular interest in that the scattering is mediated predominantly through exchange of a single charged pion, and hence is expected to depend sensitively on the strength of the π±NN coupling constant g[sup 2, sub c], a quantity whose precise value remains highly controversial. This controversy has been heightened by new np absolute cross section data, also taken at back angles, which appear to favor the higher values of g&sup2[sub c] obtained in earlier partial-wave analyses, but disagree with most recent predictions. After reviewing the current situation, I will describe the experimental apparatus used in our measurement and our data acquisition and analysis procedures, paying particular attention to potential sources of systematic error and their effect on the data. Our primary result is that these new values for K[sub NN'], in contrast with the recent cross section data, agree most closely with the predictions of modern NN potential models in which a relatively weak πNN coupling is used. [ABSTRACT FROM AUTHOR]

Published
2001

3. Spin physics program at STAR.

Author

Jacobs, W. W.

Subjects
*PARTICLES (Nuclear physics), *NUCLEAR magnetic resonance, *GLUONS
Abstract

The question as to how spin degrees of freedom in nucleons are organized ("spin puzzle") is ongoing. Quantifying the gluon polarization, not measured directly in DIS experiments, has been emphasized as necessary to complete the picture. The role of STAR in providing a definitive measurement of the gluon spin structure function is discussed, and other spin topics of current interest ar RHIC energies summarized. [ABSTRACT FROM AUTHOR]

Published
2000

4. pp→pnπ+ cross sections near threshold

Author

Dytman, S. A., primary, Daehnick, W. W., additional, Brooks, W. K., additional, Hardie, J. G., additional, Flammang, R. W., additional, Bland, L., additional, Jacobs, W. W., additional, Rinckel, T., additional, Pancella, P. V., additional, Brown, J. D., additional, and Jacobson, E., additional

Published
1995
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5. Polarization observables in p[downward right arrow]p→pKY[downward right arrow] reactions at 2.9 GeV

Author

Arvieux, J., primary, Balestra, F., additional, Bedfer, Y., additional, Bertini, R., additional, Bland, L. C., additional, Bossolasco, S., additional, Brochard, F., additional, Bussa, M. P., additional, Falomkin, I. V., additional, Fava, L., additional, Ferrero, L., additional, Garfagnini, R., additional, Gill, D. R., additional, Grasso, A., additional, Jacobs, W. W., additional, Lyascenko, V. I., additional, Maggiora, A., additional, Panzieri, D., additional, Piragino, G., additional, Pontecorvo, G. B., additional, Serdyuk, V., additional, Tosello, F., additional, Travkin, V. I., additional, Vigdor, S. E., additional, Zalikanov, B., additional, and Zosi, G., additional

Published
1995
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6. Measurement of spin observables in quasielastic scattering of polarized protons from polarized 3He

Author

Miller, M. A., primary, Lee, K., additional, Smith, A., additional, Hansen, J.-O., additional, Bloch, C., additional, van den Brand, J. F. J., additional, Bulten, H. J., additional, DeSchepper, D., additional, Ent, R., additional, Goodman, C. D., additional, Jacobs, W. W., additional, Jones, C. E., additional, Korsch, W., additional, Kramer, L. H., additional, Leuschner, M., additional, Lorenzon, W., additional, Makins, N. C. R., additional, Marchlenski, D., additional, Meyer, H. O., additional, Milner, R. G., additional, Neal, J. S., additional, Pancella, P. V., additional, Pate, S. F., additional, Pitts, W. K., additional, von Przewoski, B., additional, Rinckel, T., additional, Savopulos, G., additional, Sowinski, J., additional, Sperisen, F., additional, Sugarbaker, E. R., additional, Tschalär, C., additional, Unal, O., additional, Welch, T. P., additional, and Zhou, Z.-L., additional

Published
1995
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17. An experimental test of charge symmetry in n−p scattering

Author

Vigdor, S. E., primary, Bacher, A. D., additional, DuPlantis, D., additional, Jacobs, W. W., additional, Meyer, H.-O., additional, Moake, G. L., additional, Schwandt, P., additional, Stephenson, E. J., additional, Knutson, L. D., additional, Quin, P. A., additional, Sowinski, J., additional, Hichwa, B. P., additional, and Jolivette, P. L., additional

Published
1981
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