Particle-Gamma Coincidence Study of Gross-Structure Peaks inC12+C

Abstract

QCD K ± distribution to the nonperturbative region.A useful analytical approximation to Eq. (11), valid for a constant, is given byBessel function. This result was derived earlier in Ref. 4. Equation (17) gives the same (k ± ) and (kj 2 ) as the original distribution (11).In conclusion, we have presented a general formalism for quark and gluon jets and their k ± distributions. A successful analysis of singlehadron k ± distributions at SPEAR (Q = 3-7.8 GeV) indicates a rather smooth extrapolation of QCD for predictions to the nonperturbative region as also found 5 for the total cross section.

Distorted wave approach to heavy ion molecular resonance

“…i~O' (9) Obviously this T-matrix consists of two processes: One is the "direct" (P~Rj) process and the other "two-step" (P--,E i Qi~Rj) process. This T-matrix has a suitable structure that lends itself easily to a comparison with the conventional second-order DWBA in the case where the direct process is forbidden.…”

“…The coupled channel models based on the door way state model [5] such as the Double Resonance Model [6], the Band Crossing Model [7] and the strong coupling model [8] have reproduced the gross structures in the well-matched channels of typical inelastic processes. On the other hand, the DWBA [9] and the secondorder DWBA [10] have succeeded in reproducing * Work supported by BMFT, GSI Darmstadt the gross structures in the single and mutual excitation channels, respectively. It seems difficult to determine the interactions so as to fit the angular distributions of both elastic and inelastic cross sections.…”

Spectroscopic amplitudes for complex cluster systems

“…Although a large number of theoretical studies of these resonances seems to confirm the usefulness of the quasi-molecular picture, an interpretation of the gross structure behavior of these resonances may be possible without invoking a model of molecular pocket resonances . [38][39][40] Evidence for the nuclear molecular picture must thus be sought in the fine structure of these resonances. The large number of closely spaced, narrow fine structure components are the distinctive feature of the "C+ "C resonances.…”

Spin assignments for quasi-molecular resonances from angular correlation techniques

“…As a result, few rigorous spin assignments have been available for resonances in inelastic scattering channels with non-zero channel spin. Some progress was made by resorting to particle-gamma-ray angular correlation measurements [5][6][7], however definitive measurements are complicated and, without a 4-gamma-detector apparatus, the results are often model dependent and difficult to interpret. …”