Based on the proposal by Witten,De Rujula and Glashow,we carried out the experimental search on two meteorites for the fossil tracks formed by cosmic nuclearites with masses ranging from M~6×10^(-4)g up to very l...Based on the proposal by Witten,De Rujula and Glashow,we carried out the experimental search on two meteorites for the fossil tracks formed by cosmic nuclearites with masses ranging from M~6×10^(-4)g up to very large mass.An upper limit 2km-2y-1(2πsr)-1 was obtained for the cosmic nuclearites with masses larger than 6×10^(-4)g which passed through these meteorites.展开更多
I. Introduction： In contrast to the vector and tensor mesons, the identification of the scalar mesons is a long-standing puzzle. Scalar resonances are difficult to resolve because some of them have large decay widths...I. Introduction： In contrast to the vector and tensor mesons, the identification of the scalar mesons is a long-standing puzzle. Scalar resonances are difficult to resolve because some of them have large decay widths which cause a strong overlap between resonances and background. In addition, several decay channels sometimes open up within a short mass interval （e.g. at the KK and ηη thresholds）, producing cusps in the line shapes of the near-by resonances. Furthermore, one expects non-qq scalar objects, such as glueballs and multiquark states in the mass range below 2 GeV （for reviews see, e.g., Refs. [1-5] and the mini-review on non-qq states in this Review of Particle Physics （RPP））.展开更多
文摘Based on the proposal by Witten,De Rujula and Glashow,we carried out the experimental search on two meteorites for the fossil tracks formed by cosmic nuclearites with masses ranging from M~6×10^(-4)g up to very large mass.An upper limit 2km-2y-1(2πsr)-1 was obtained for the cosmic nuclearites with masses larger than 6×10^(-4)g which passed through these meteorites.
文摘I. Introduction： In contrast to the vector and tensor mesons, the identification of the scalar mesons is a long-standing puzzle. Scalar resonances are difficult to resolve because some of them have large decay widths which cause a strong overlap between resonances and background. In addition, several decay channels sometimes open up within a short mass interval （e.g. at the KK and ηη thresholds）, producing cusps in the line shapes of the near-by resonances. Furthermore, one expects non-qq scalar objects, such as glueballs and multiquark states in the mass range below 2 GeV （for reviews see, e.g., Refs. [1-5] and the mini-review on non-qq states in this Review of Particle Physics （RPP））.
