Latest content added for Digital Libraryhttps://digital.library.unt.edu/search/?t5=dc_subject&q5=%22Deck+Effect%22&display=grid&searchType=advanced2019-02-10T20:45:37-06:00UNT LibrariesThis is a custom feed for searching Digital LibraryUnitary coupled channel deck model2019-02-10T20:45:37-06:00https://digital.library.unt.edu/ark:/67531/metadc1450645/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1450645/"><img alt="Unitary coupled channel deck model" title="Unitary coupled channel deck model" src="https://digital.library.unt.edu/ark:/67531/metadc1450645/small/"/></a></p><p>A unitary Deck model with coupled K*..pi.. and Krho channels, including only one resonance in the Q region is constructed. Adjusting the resonance parameters, one achieves a satisfactory description of the experimental phase variations and structure in the mass spectra. The resonance is determined to belong to the J/sup PC/ = 1/sup + -/ SU(3) octet, and is thus the Q/sub B/. The relative coupling strength K*..pi../Krho is approximately 2/3.</p>Diffractive dissociation process. pi. /sup -/p. -->. pi. /sup -/ (. pi. /sup -/. pi. /sup +/p) at 14 GeV/c. [Cross sections, Deck effect, t- and s-channel helicity conservation]2019-02-10T20:45:37-06:00https://digital.library.unt.edu/ark:/67531/metadc1445634/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1445634/"><img alt="Diffractive dissociation process. pi. /sup -/p. -->. pi. /sup -/ (. pi. /sup -/. pi. /sup +/p) at 14 GeV/c. [Cross sections, Deck effect, t- and s-channel helicity conservation]" title="Diffractive dissociation process. pi. /sup -/p. -->. pi. /sup -/ (. pi. /sup -/. pi. /sup +/p) at 14 GeV/c. [Cross sections, Deck effect, t- and s-channel helicity conservation]" src="https://digital.library.unt.edu/ark:/67531/metadc1445634/small/"/></a></p><p>An experiment in which a 14 GeV/c ..pi../sup -/ beam was incident on a hydrogen bubble chamber is described. Fast forward scattered pions traversed a wire spark chamber spectrometer downstream of the bubble chamber. Events identified as inelastic by the spectrometer induced a trigger of the bubble chamber camera. The film produced contained a heavy enrichment of events of proton diffractive dissociation. A sample from this exposure of 4400 events of the reaction ..pi../sup -/p ..-->.. ..pi../sup -/N* ..-->.. ..pi../sup -/..pi../sup -/..pi../sup +/p was studied. In the two body mass spectra the only noteworthy feature is the ..delta../sup + +/(1230). In the N* mass spectrum one observes enhancements at 1.49 GeV, 1.72 GeV, and 2.0 GeV. For the prominent 1.72 GeV feature estimates are given of the width and cross section as well as evidence favoring a substantial branching fraction to ..pi delta..(1230). We looked for production of N*(1470) followed by decay to ..pi delta..(1230) with negative result. An examination of the ..delta../sup + +/(1230) decay distribution suggests that the Deck mechanism is the major contributor to the ..pi delta.. subchannel. The s-channel and t-channel helicity conservation rules were tested. One observed violent conflict with sCHC and mild conflict with tCHC. One also tested for simultaneous validity of tCHC and the Gribov--Morrison rule and found no significant contradiction with this dual hypothesis.</p>Deck model calculation of $pi$$sup -$p $Yields$ $pi$$sup -$$pi$$sup +$$pi$$sup -$p2017-10-15T22:09:52-05:00https://digital.library.unt.edu/ark:/67531/metadc1024996/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1024996/"><img alt="Deck model calculation of $pi$$sup -$p $Yields$ $pi$$sup -$$pi$$sup +$$pi$$sup -$p" title="Deck model calculation of $pi$$sup -$p $Yields$ $pi$$sup -$$pi$$sup +$$pi$$sup -$p" src="https://digital.library.unt.edu/ark:/67531/metadc1024996/small/"/></a></p><p>A Deck-like model for the reaction pi /sup -/p yields pi /sup -/ pi / sup +/ pi /sup -/p is formulated and studied. The model differs from previous Deck calculations in two respects: i) experimental data are used for both pi pi and pi N scattering, and ii) the amplitude has proper Bose symmetry. Feature i) allows one to examine any desired region of 3 pi mass (the A/sub 3/ is treated on the same footing as the A/sub 1/); features i) and ii) allow one to examine all the angular dependence in the final state and to compare with partinl wave analyses of experimental data. The results of a study are presented in which events generated from the model by a Monte Carlo method are plotted and fit in the same way as experimental events. Many of the features of the data are qualitatively reproduced including certain important properties obtained from the partial wave analysis in the A/sub 1/ region. The A/sub 3/ region is not accurately representcd by the model. (auth)</p>Critique of the Reggeized deck model2017-10-15T22:09:52-05:00https://digital.library.unt.edu/ark:/67531/metadc1023567/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1023567/"><img alt="Critique of the Reggeized deck model" title="Critique of the Reggeized deck model" src="https://digital.library.unt.edu/ark:/67531/metadc1023567/small/"/></a></p><p>None</p>Analysis of proton--deuteron interactions at Fermilab energies2017-10-15T22:09:52-05:00https://digital.library.unt.edu/ark:/67531/metadc1020944/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1020944/"><img alt="Analysis of proton--deuteron interactions at Fermilab energies" title="Analysis of proton--deuteron interactions at Fermilab energies" src="https://digital.library.unt.edu/ark:/67531/metadc1020944/small/"/></a></p><p>None</p>Glauber--Deck model for 3$pi$ production on nuclei2017-10-15T22:09:52-05:00https://digital.library.unt.edu/ark:/67531/metadc1023965/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1023965/"><img alt="Glauber--Deck model for 3$pi$ production on nuclei" title="Glauber--Deck model for 3$pi$ production on nuclei" src="https://digital.library.unt.edu/ark:/67531/metadc1023965/small/"/></a></p><p>None</p>A$sub 2$--A$sub 1$ interference phase2017-10-15T22:09:52-05:00https://digital.library.unt.edu/ark:/67531/metadc1024958/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1024958/"><img alt="A$sub 2$--A$sub 1$ interference phase" title="A$sub 2$--A$sub 1$ interference phase" src="https://digital.library.unt.edu/ark:/67531/metadc1024958/small/"/></a></p><p>None</p>Studies of neutron dissociation at Fermilab energies2016-09-21T02:29:59-05:00https://digital.library.unt.edu/ark:/67531/metadc873357/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc873357/"><img alt="Studies of neutron dissociation at Fermilab energies" title="Studies of neutron dissociation at Fermilab energies" src="https://digital.library.unt.edu/ark:/67531/metadc873357/small/"/></a></p><p>None</p>Developments in the phenomenology of two-to-three particle reactions2016-09-21T02:29:59-05:00https://digital.library.unt.edu/ark:/67531/metadc880533/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc880533/"><img alt="Developments in the phenomenology of two-to-three particle reactions" title="Developments in the phenomenology of two-to-three particle reactions" src="https://digital.library.unt.edu/ark:/67531/metadc880533/small/"/></a></p><p>None</p>Decay properties of p$pi$$sup -$ systems produced in neutron dissociation at Fermilab energies2016-09-21T02:29:59-05:00https://digital.library.unt.edu/ark:/67531/metadc881141/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc881141/"><img alt="Decay properties of p$pi$$sup -$ systems produced in neutron dissociation at Fermilab energies" title="Decay properties of p$pi$$sup -$ systems produced in neutron dissociation at Fermilab energies" src="https://digital.library.unt.edu/ark:/67531/metadc881141/small/"/></a></p><p>None</p>