Longitudinal Electroproduction of Charged Pions from
Separated longitudinal and transverse cross sections for charged pion electroproduction from {sup 1}H, {sup 2}H, and {sup 3}He were measured at Q{sup 2} = 0.4 (GeV/c){sup 2} for two values of the invariant mass, {bar W} = 1.15 GeV and {bar W} = 1.60 GeV, in a search for a mass dependence which would...
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| creator | David Gaskell Abdellah Ahmidouch Pawel Ambrozewicz H. Anklin John Arrington K. Assamagan Steven Avery Kevin Bailey Oliver K. Baker Shelton Beedoe Elizabeth Beise Herbert Breuer D. S. Brown Roger Carlini Jinseok Cha Nicholas Chant Anthony Cowley Samuel Danagoulian D. De Schepper Jim Dunne Dipangkar Dutta Rolf Ent Liping Gan Ashot Gasparian Donald Geesaman Ron Gilman Charles Glashausser Paul Gueye M. Harvey O. Hashimoto Wendy Hinton G. Hofman Ceasar Jackson Hal Jackson Cynthia Keppel Ed Kinney Doug Koltenuk G. Kyle Allison Lung David Mack D. McKee Joseph Mitchell Hamlet Mkrtchyan B. Mueller Gabriel Niculescu Ioana Niculescu Tom O'Neill V. Papavassiliou Dave Potterveld Juerg Reinhold Philip Roos Reyad Sawafta Ralph Segel Stepan Stepanyan Vardan Tadevosyan T. Takahashi Liguang Tang B. Terburg D. Van Westrum J. Volmer T. P. Welch Stephen Wood Lulin Yuan Ben Zeidman Beni Zihlmann |
| description | Separated longitudinal and transverse cross sections for charged pion electroproduction from {sup 1}H, {sup 2}H, and {sup 3}He were measured at Q{sup 2} = 0.4 (GeV/c){sup 2} for two values of the invariant mass, {bar W} = 1.15 GeV and {bar W} = 1.60 GeV, in a search for a mass dependence which would signal the effect of nuclear pions. This is the first such study that includes recoil momenta significantly above the Fermi surface. The longitudinal cross section, if dominated by the pion-pole process, should be sensitive to nuclear pion currents. Comparisons of the longitudinal cross section target ratios to a quasifree calculation reveal a significant suppression in {sup 3>}He at {bar W} = 1.60 GeV. The {bar W} = 1.15 GeV results are consistent with simple estimates of the effect of nuclear pion currents, but are also consistent with pure quasifree production. |
| doi_str_mv | 10.1103/PhysRevLett.87.202301 |
| format | Article |
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The longitudinal cross section, if dominated by the pion-pole process, should be sensitive to nuclear pion currents. Comparisons of the longitudinal cross section target ratios to a quasifree calculation reveal a significant suppression in {sup 3>}He at {bar W} = 1.60 GeV. The {bar W} = 1.15 GeV results are consistent with simple estimates of the effect of nuclear pion currents, but are also consistent with pure quasifree production.</abstract><cop>United States</cop><doi>10.1103/PhysRevLett.87.202301</doi><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0031-9007 |
| ispartof | Physical review letters, 2001-11, Vol.87 (20) |
| issn | 0031-9007 1079-7114 |
| language | eng |
| recordid | cdi_osti_scitechconnect_804107 |
| source | American Physical Society Journals |
| subjects | CROSS SECTIONS ELECTROPRODUCTION FERMI LEVEL PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PIONS PRODUCTION TARGETS |
| title | Longitudinal Electroproduction of Charged Pions from |
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