Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Eric Umland"'
Autor:
Eric Umland, Ian Duck
Publikováno v:
Physics Letters B. 128:221-224
Two isomers of the nucleon, consisting of three 1S quarks and a transverse electric gluon, are predicted by the bag model to exist at masses around 1600 MeV. Mixing of these states with the nucleons seems unacceptably large. With this motivation we r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0af1ccd802a2961e85bb1b9193c45bf3
https://doi.org/10.1016/0370-2693(83)90396-9
https://doi.org/10.1016/0370-2693(83)90396-9
Publikováno v:
Physical Review D. 27:2678-2685
We investigate the N*(1470) in the context of the cloudy bag model. Gluonic and pionic self-energy terms mix the two orthogonal SU(6) N* states. After correcting the mass for spurious center-of-mass motion, we obtain a doublet of states with masses o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e514820a1af3a153162f7c0d12954247
https://doi.org/10.1103/physrevd.27.2678
https://doi.org/10.1103/physrevd.27.2678
Autor:
T.M. Williams, J.M. Clement, G. P. Pepin, B. W. Mayes, S. D. Baker, E. V. Hungerford, D. M. Judd, Eric Umland, R.D. Felder, W. von Witsch, G. S. Mutchler, G.C. Phillips, W. H. Dragoset, Ian Duck, L. S. Pinsky, Miroslav Furić, J.C. Allred, J.H. Hoftiezer
Publikováno v:
Physical Review C. 23:407-414
Differential cross sections for the reaction /sup 2/H(..pi../sup + -/,p..pi../sup + -/)n at incident pion momentum 340 MeV/c in a kinematically complete experiment are reported for eleven angle pairs. At neutron momenta or approx. =40 MeV/c, the data
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1edb379aa7af5fd02b2b7a836e5288c8
https://doi.org/10.1103/physrevc.23.407
https://doi.org/10.1103/physrevc.23.407
Autor:
Ian Duck, Eric Umland
Publikováno v:
Physics Letters B. 116:308-310
The cloudy bag model predicts f πΔΔ a factor of two greater than the experimental results deduced by Arndt et al. Possible explanations are explored.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a360b83376fd87618298115af6340d9
https://doi.org/10.1016/0370-2693(82)90287-8
https://doi.org/10.1016/0370-2693(82)90287-8
Autor:
Ian Duck, Eric Umland
Publikováno v:
Physics Letters B. 124:284-286
The spectrum of nucleon recurences in the 1–2 GeV region is analyzed in the context of the Cloudy Bag Model. The (1470) Roper resonance is required to be two (1s) 2 2s three quark states split by ∼ 100 MeV. The P 11 (1710) can be accomodated as a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da1aaf11dfb3637fdfc464843eff40b2
https://doi.org/10.1016/0370-2693(83)91454-5
https://doi.org/10.1016/0370-2693(83)91454-5
Autor:
Eric Umland, Ian Duck
Publikováno v:
Physics Letters B. 96:230-232
The reduced widths of the conjectured J = 2 + (2180) and J = 3 − (2220) dibaryon resonances in NN and πD channels are calculated.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f64b99a206d9ec70689700ad61275c5f
https://doi.org/10.1016/0370-2693(80)90755-8
https://doi.org/10.1016/0370-2693(80)90755-8
Autor:
J. M. Clement, G. P. Pepin, E. V. Hungerford, G. C. Phillips, S. D. Baker, M. McNaughton, G.S. Mutchler, Eric Umland, J.A. Buchanan, J.C. Allred, M. Copel, L. S. Pinsky, C. Hwang, R.W. Hackenburg, V. W. Mayes, D. M. Judd, A. D. Hancock, T. M. Williams
Publikováno v:
AIP Conference Proceedings.
We have measured the spin dependent fifth differential cross section for the reaction p↑+p → pπ+n through the 3/2, 3/2 resonances in a kinematically complete experiment at 800 MeV.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d3fde80e4c129151fc99d3b47e952aa
https://doi.org/10.1063/1.32726
https://doi.org/10.1063/1.32726
Publikováno v:
Physics Letters B. 127:155-156
The soliton bag model of quark confinement is shown to give the same pionic coupling as the cloudy bag model, explicitly independent of details of the soliton field. The Goldberger-Treiman relation is satisfied in this development.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7da266dd089105c6cc43f09b7adebaa0
https://doi.org/10.1016/0370-2693(83)90865-1
https://doi.org/10.1016/0370-2693(83)90865-1