Heavy quarks and new particles
AIP Conference Proceedings
Some aspects of particles contaihing c, b, and heavies quarks are reviewed. It is shown how these particles can provide tests of. the short-range. w t m e of the strong interactions, and haw el-tary quantum mechanics can reveal the color and charge of the constituents and the number of strates below flavor threshold. Some new resu1t;s are presented on the b r s e pmblen for confining potentials. Properties of flavored h a d m s (masses and lifetimes), of gluonic bound states, a~d of particles
... a~d of particles comainiq very heavy objects are also discussed. New particles cmtaining heavy quarks were first discovered justfzve years ag0.l Thne now appears to be a ri h variety of states cmtaining the charmed quark t = 1% G~V J C~] , The first term describes singie-glwn exchange, while the second is an approximation to the expected long-range quark-confining f~rce. An effective strong couplin ant as -0.4 is stipulated by the charmonim and T spectra.lf*r8yE Alternatively, any trend toward short-distance Coulomb-like effects may be extracted directly from the behavior of masses and leptonic widths as functions of quark mass and quantum numbers. This may be done with the he1 of scaling properties of the SchrMinger equation (subsection A) !>l6 or via inverse scattering methods (subsection B) .17-19 It is possible to compare the value of as obtained in Eq. (1) with those obtained from other sources (subsection C) . A. Scaling. A useful idealization of the quark-antiquark interaction is an effective-power-law potential ~( r )rv (3) DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. FZFKILAB-PUB-79169.-THY, S e p t . , 1979 [unpublished). 1 1 1 . I a t h~s c o n t e x t , s = e M. B u Voloshin, preprints ITEP-176-1978 a~d I7EP-54-1979 (~n p u b l i~h e d ) . 112 F. H . Heimlich, g g . . Pkys. L e z t . m, 393 (1979:. 113 k Duxcan, Phys. Fev g, 2866 (19;s); M . 8. Voloshin and V . I. Zakharov, p r l v a t e ccmmunication. 1 1 4 . 5 L. Glashow, J. I l i o p o u l o s , a d L . Plaiani, Phys. Rev. E, U 3 5 (1970). 1 1 5 . L Wokfenstein, t h s ? proceedings.