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Resonances in high-energy colliding lepton beams

Description: The search for the correct higher symmetry of decay vertices is discussed. It is noted that something higher than SU(3) is certainly valid and colliding lepton beams can help find what it is. SU(6(/sub W/ and its limitations, L = 1, 2 mesons, and the two-photon processes e/sup +/ + e/sup -/ yields e/sup +/ + e/sup -/ + hadrons, and e/sup -/ + e/sup -/ yields e/sup -/ + e/sup -/ + hadrons are considered. (JFP)
Date: March 13, 1973
Creator: Rosner, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Current quarks, constituent quarks, and symmetries of resonance decays

Description: The transformation between ''current'' quarks and ''constituent'' quarks recently suggested by Melosh is examined with respect to its predictions for pionic decays of resonances. It implies the use of SU(6)/sub W/ for classifying particle states but not for describing decay processes. lnstead, pion emission proceeds via DELTA L/sub z/ = 0, plus or minus 1, where L is the internal (''quark'') orbital angular momentum. This decay symmetry is called SU(6)/sub W/ (DELTA L/sub z/ = 0, plus or minus … more
Date: April 18, 1973
Creator: Hey, A.J.G.; Rosner, J.L. & Weyers, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Phases of resonant amplitudes: {pi}N {Yields} {pi}{delta}

Description: The phases of resonant amplitudes in pi N yields pi DELTA are studied in a modified version of SU(6)w in which amplitudes involving different relative orbital angular momenta l are uncoupled from one another. This form of SU(6)/sub W/ is equivalent to one studied recently by Melosh, in which the set of selection rules for decays is extended to allow for more types of transition than in the original version of this symmetry. The predictions are compared with a recent preliminary analysis by Hern… more
Date: May 23, 1973
Creator: Faiman, D. & Rosner, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High energy physics studies progress report. Part I. Experimental program. [Summaries of research activities at Ohio State University]

Description: The experimental program of research, including Assembly of an experiment at Fermilab E-351 to measure decay lifetimes, with tagged emulsion, of charmed particles produced by high energy neutrinos will continue. A data-taking run will take place in the coming fiscal year. Participation in the neutrino experiment E-310, Fermilab-Harvard-Pennsylvania-Rutgers-Wisconsin, will also continue. Data analysis from several experiments performed in the recent past at the ZGS ANL is in progress and will be… more
Date: January 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pion-nucleon scattering and pion production in nucleon-nucleon and nucleus-nucleus collisions

Description: Lecture notes are presented on the following: (1) basic aspects of ..pi..N interactions (properties of pions and nucleons, SU(3) and SU(6) classification phenomenology of ..pi..N scattering ((3.3) resonance; phase shift analysis, and bag model approach to ..pi..N); (2) pion production and absorption in the two nucleon system (NN ..-->.. NN..pi.. (isobar model) and ..pi..d reversible NN (existence of dibaryon resonances)); (3) pion absorption in complex nuclei (multiparticle aspects and cascade … more
Date: January 1, 1982
Creator: Dover, C. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Basis for calculations in the topological expansion

Description: Investigations aimed at putting the topological theory of particles on a more quantitative basis are described. First, the incorporation of spin into the topological structure is discussed and shown to successfully reproduce the observed lowest mass hadron spectrum. The absence of parity-doubled states represents a significant improvement over previous efforts in similar directions. This theory is applied to the lowest order calculation of elementary hadron coupling constant ratios. SU(6)/sub W… more
Date: December 1, 1982
Creator: Levinson, Mark Alan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Skyrmions and vector mesons: a symmetric approach

Description: We propose an extension of the effective, low-energy chiral Lagrangian known as the Skyrme model, to one formulated by a non-linear sigma model generalized to include vector mesons in a symmetric way. The model is based on chiral SU(6) x SU(6) symmetry spontaneously broken to static SU(6). The rho and other vector mesons are dormant Goldstone bosons since they are in the same SU(6) multiplet as the pion and other pseudoscalars. Hence the manifold of our generalized non-linear sigma model is the… more
Date: January 1, 1984
Creator: Caldi, D. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Group representation matrix and scattering from nuclei

Description: It is shown that the transition matrix for elastic and inelastic medium energy protons scattered from nuclei described by the interacting boson model is the SU/sub 6/ group representation matrix. Closed form expressions for this transition matrix are derived for the special cases of a vibrational nucleus, a ..gamma..-unstable rotor nucleus, and an axially symmetric rotor nucleus.
Date: January 1, 1985
Creator: Ginocchio, J.N.
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Partner: UNT Libraries Government Documents Department
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Summary of the 8th international symposium on high energy spin physics

Description: The series of conferences on high energy spin physics dates back to Argonne, 1974, and the first use of the polarized proton beam at the ZGS. This conference is unique in that it is concerned both with the technology of spin and with particle physics: particle physicists need to know what experiments might be possible and target/beam/source physicists want to know what their work will lead to, and get new ideas. In many cases, and I believe that this is central to the success of spin physics an… more
Date: January 1, 1988
Creator: Bunce, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Spin Models of the Proton

Description: We have constructed a model of the proton spin based on a broken SU(6) parameterization for the spin-weighted valence quark distributions in a longitudinally polarized proton. The polarized sea and gluon distributions are assumed to have simple relations to the corresponding unpolarized structure functions. The sum rules, which involve the non-singlet components of the structure function xg/sub 1/, imply that the valence quarks carry about 78% of the proton spin, while the spin carried by sea q… more
Date: October 20, 1988
Creator: Ramsey, G. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Old and new physics in nucleon spin structure

Description: EMC implies quarks carry very little of the proton spin. (G{sub A}/G{sub V}){sub n{yields}p} implies that valence quarks carry 70% of the spin, but disagrees with SU(6). (G{sub A}/G{sub V}){sub {Sigma}{minus}{yields}n} agrees strinkingly with SU(6). All semileptonic decay data can be fit by SU(3), but no model fits the data by breaking SU(6) without also breaking SU(3). Considerable data on hadron masses and magnetic moments are fit by a simple constituent quark model with only constituent quar… more
Date: January 1, 1991
Creator: Lipkin, H. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Old and new physics in nucleon spin structure

Description: EMC implies quarks carry very little of the proton spin. (G{sub A}/G{sub V}){sub n{yields}p} implies that valence quarks carry 70% of the spin, but disagrees with SU(6). (G{sub A}/G{sub V}){sub {Sigma}{minus}{yields}n} agrees strinkingly with SU(6). All semileptonic decay data can be fit by SU(3), but no model fits the data by breaking SU(6) without also breaking SU(3). Considerable data on hadron masses and magnetic moments are fit by a simple constituent quark model with only constituent quar… more
Date: December 31, 1991
Creator: Lipkin, H. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Operator analysis of L=1 baryon masses in large N{sub c} QCD

Description: The authors consider in detail the mass operator analysis for the nonstrange L=1 excited baryons in large N{sub c} QCD. They present a straightforward procedure for constructing the large N{sub c} baryon wavefunctions, and provide complete analytic expressions for the matrix elements of all the independent isosinglet mass operators. They discuss the relationship between the old-fashioned operator analyses based on nonrelativistic SU(6) symmetry and the modern large N{sub c} approach, which has … more
Date: December 1, 1998
Creator: Carlson, Carl E.; Carone, Christopher D.; Goity, Jose L. & Lebed, Richard F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A meson exchange model for the YN interaction

Description: We present a new model for the hyperon-nucleon (Lambda N, Sigma N) interaction, derived within the meson exchange framework. The model incorporates the standard one boson exchange contributions of the lowest pseudoscalar and vector meson multiplets with coupling constants fixed by SU(6) symmetry relations. In addition - as the main feature of the new model - the exchange of two correlated pions or kaons, both in the scalar-isoscalar (sigma) and vector-isovector (rho) channels, is included.
Date: September 1, 2001
Creator: Haidenbauer, J.; Melnitchouk, W. & Speth, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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