Browsing by Author "Lizzi, F"

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    DOUBLY STRANGE DIBARYON IN THE CHIRAL MODEL
    (American Physical Society, 1984-03-12) Balachandran, AP; Barducci, A; Lizzi, F; Rodgers, VGJ; Stern, A; University of Texas System; University of Texas Austin; University of Alabama Tuscaloosa
    It shown that the chiral model with SU (3) flavor symmetry predicts a dibaryon state of low mass M (M2.2 GeV). It is electrically neutral and is an SU (3) singlet with JP=0+. It corresponds to a six-quark state found in the MIT bag model by Jaffe. It is also shown that there is no stable particlelike state of baryon number 2 which is based on Skyrme's spherically symmetric Ansatz for the chiral field. © 1984 The American Physical Society.
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    On the absence of continuous symmetries for noncommutative 3-spheres
    (American Institute of Physics, 2005-10-24) Lizzi, F; Stern, A; Vitale, P; University of Naples Federico II; Istituto Nazionale di Fisica Nucleare (INFN); University of Alabama Tuscaloosa
    A large class of noncommutative spherical manifolds was obtained recently from cohomology considerations. A one-parameter family of twisted three-spheres was discovered by Connes and Landi, and later generalized to a three-parameter family by Connes and Dubois-Violette. The spheres of Connes and Landi were shown to be homogeneous spaces for certain compact quantum groups. Here we investigate whether this property can be extended to the noncommutative three-spheres of Connes and Dubois-Violette. Upon restricting to quantum groups which are continuous deformations of Spin(4) and SO(4) with standard coactions, our results suggest that this is not the case. (c) 2005 American Institute of Physics.