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Interference Effect between phi and Lambda(1520) Production Channels in the gamma p -> K(+)K(-)p Reaction near Threshold
- Authors
- Ryu, S. Y.; Ahn, J. K.; Nakano, T.; Ahn, D. S.; Ajimura, S.; Akimune, H.; Asano, Y.; Chang, W. C.; Chen, J. Y.; Date, S.; Ejiri, H.; Fujimura, H.; Fujiwara, M.; Fukui, S.; Hasegawa, S.; Hicks, K.; Horie, K.; Hotta, T.; Hwang, S. H.; Imai, K.; Ishikawa, T.; Iwata, T.; Kato, Y.; Kawai, H.; Kino, K.; Kohri, H.; Kon, Y.; Kumagai, N.; Lin, P. J.; Maeda, Y.; Makino, S.; Matsuda, T.; Matsuoka, N.; Mibe, T.; Miyabe, M.; Miyachi, M.; Morino, Y.; Muramatsu, N.; Murayama, R.; Nakatsugawa, Y.; Nam, S. I.; Niiyama, M.; Nomachi, M.; Ohashi, Y.; Ohkuma, H.; Ohta, T.; Ooba, T.; Oshuev, D. S.; Parker, J. D.; Rangacharyulu, C.; Sakaguchi, A.; Sawada, T.; Shagin, P. M.; Shiino, Y.; Shimizu, H.; Strokovsky, E. A.; Sugaya, Y.; Sumihama, M.; Tokiyasu, A. O.; Toi, Y.; Toyokawa, H.; Tsunemi, T.; Uchida, M.; Ungaro, M.; Wakai, A.; Wang, C. W.; Wang, S. C.; Yonehara, K.; Yorita, T.; Yoshimura, M.; Yosoi, M.; Zegers, R. G. T.
- Issue Date
- 7-Jun-2016
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.116, no.23
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 116
- Number
- 23
- ISSN
- 0031-9007
- Abstract
- The phi-Lambda(1520) interference effect in the gamma p -> K(+)K(-)p reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between phi and Lambda(1520) production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when K+K- 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 root s = 2.1 GeV bump structure in forward differential cross sections for phi photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange, or rescattering processes via other hyperon states.
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Related Researcher
- Ahn, Jung Keun
- College of Science (Department of Physics)