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pro vyhledávání: '"D.J. Ernst"'
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Autor:
R.J. McLeod, D.J. Ernst
Publikováno v:
Physics Letters B. 410:67-72
The contribution of the nucleon-pole piece of the pion-nucleon amplitude to the pion-nucleus optical potential is examined. Straightforward calculations of diagrams which are intermediate between Goldstone and Feynman diagrams produce simple results
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1703748cbb04de50c768a20127d00885
https://doi.org/10.1016/s0370-2693(97)00941-6
https://doi.org/10.1016/s0370-2693(97)00941-6
Autor:
S. Bart, L. Lee, D.J. Ernst, R. J. Sutter, L. J. Kurth, S. Hama, R. J. Peterson, M.F. Jiang, C.M. Kormanyos, M. Barakat, R. Michael, L. S. Pinsky, K. Hicks, Tadamitsu Kishimoto, B. C. Clark, Wendy L. Hinton, R. E. Chrien, L. G. Tang, R. Sawafta, E. V. Hungerford, J.E. Wise, B. W. Mayes
Publikováno v:
Physics Letters B. 382:29-34
Elastic differential cross sections for K + mesons scattered from nat C and 6 Li targets have been measured at an incident momentum of 715 MeV/c and at angles of 7° to 42° in the laboratory frame. The experimental cross sections agree, within error
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5bf0adf762bf98262bf9d91517c35a3
https://doi.org/10.1016/0370-2693(96)00664-8
https://doi.org/10.1016/0370-2693(96)00664-8
Autor:
D.J. Ernst, Dharam Vir Ahluwalia
Publikováno v:
Physics Letters B. 287:18-22
Following Weinberg, we note that for arbitrary spin the covariant spinors and the field operators can be constructed directly from Lorentz covariance. The propagator may then be defined as the vacuum expectation value of the time-ordered product of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1dc320fd1f96a50cd77eae81200673db
https://doi.org/10.1016/0370-2693(92)91869-b
https://doi.org/10.1016/0370-2693(92)91869-b
Publikováno v:
Nuclear Physics A. 518:658-682
A model for the resonant pion-nucleon D- and F-waves is developed which assumes that the pion-plus-nucleon couples to a resonance and that the resonance can serve as a doorway to the inelastic channels. With the use of simple form factors, the model
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b0cf9279792f70d2af5175a327eb370
https://doi.org/10.1016/0375-9474(90)90184-n
https://doi.org/10.1016/0375-9474(90)90184-n
In this Final Technical Report, the authors summarize the research activities of the three Principal Investigators (Professors Ernst, Oberacker, and Umar) at Vanderbilt University since the last reporting period through the subject award expiration d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59fa181706654a3c23ef6f2865382749
https://doi.org/10.2172/604344
https://doi.org/10.2172/604344
Autor:
D.J. Ernst, G.R. Burleson
This report contains a collection of papers on pion-nucleus interactions that were written as part of the long-range planning process of LAMPF that took place in spring, 1989. These papers served as the basis of the pion portion of a report to the Nu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0dd886b3692cd1868d85a59373a287a1
https://doi.org/10.2172/5233810
https://doi.org/10.2172/5233810
Akademický článek
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Akademický článek
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Autor:
R.J. McLeod, D.J. Ernst
Publikováno v:
Physics Letters B. 119:277-280
An N / D dispersion theory is developed which solves crossing symmetric Low equations. The method is used to generate crossing symmetric solutions to the Chew-Low model. We show why the technique originally proposed by Chew and Low was incapable of p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::909bc7395ca2a5189aa339a192baacf1
https://doi.org/10.1016/0370-2693(82)90669-4
https://doi.org/10.1016/0370-2693(82)90669-4