Interference effect between $\phi$ and $\Lambda(1520)$ production channels in the $\gamma p \rightarrow K^+K^-p$ reaction near threshold
Abstract
The - interference effect in the reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between and production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when pairs are observed at forward angles, but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the GeV bump structure in forward differential cross sections for photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange and rescattering processes via other hyperon states.
Keywords
Cite
@article{arxiv.1603.00236,
title = {Interference effect between $\phi$ and $\Lambda(1520)$ production channels in the $\gamma p \rightarrow K^+K^-p$ reaction near threshold},
author = {S. Y. Ryu and J. K. Ahn and T. Nakano and D. S. Ahn and S. Ajimura and H. Akimune and Y. Asano and W. C. Chang and J. Y. Chen and S. Date and H. Ejiri and H. Fujimura and M. Fujiwara and S. Fukui and S. Hasegawa and K. Hicks and K. Horie and T. Hotta and S. H. Hwang and K. Imai and T. Ishikawa and T. Iwata and Y. Kato and H. Kawai and K. Kino and H. Kohri and Y. Kon and N. Kumagai and P. J. Lin and Y. Maeda and S. Makino and T. Matsuda and N. Matsuoka and T. Mibe and M. Miyabe and M. Miyachi and Y. Morino and N. Muramatsu and R. Murayama and Y. Nakatsugawa and S. i. Nam and M. Niiyama and M. Nomachi and Y. Ohashi and H. Ohkuma and T. Ohta and T. Ooba and D. S. Oshuev and J. D. Parker and C. Rangacharyulu and A. Sakaguchi and T. Sawada and P. M. Shagin and Y. Shiino and H. Shimizu and E. A. Strokovsky and Y. Sugaya and M. Sumihama and A. O. Tokiyasu and Y. Toi and H. Toyokawa and T. Tsunemi and M. Uchida and M. Ungaro and A. Wakai and C. W. Wang and S. C. Wang and K. Yonehara and T. Yorita and M. Yoshimura and M. Yosoi and R. G. T. Zegers},
journal= {arXiv preprint arXiv:1603.00236},
year = {2016}
}