Interference Effect between phi and Lambda(1520) Production Channels in the gamma p -> K(+)K(-)p Reaction near Threshold

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.

doi:10.1103/PhysRevLett.116.232001

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Interference Effect between phi and Lambda(1520) Production Channels in the gamma p -> K(+)K(-)p Reaction near Threshold

Ryu, S. Y.;
Ahn, J. K.;
Nakano, T.;
Ahn, D. S.;
Ajimura, S.;
외 67명

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21

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19

초록

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.

키워드

MESON PHOTOPRODUCTION; SCATTERING; LEPS

제목: Interference Effect between phi and Lambda(1520) Production Channels in the gamma p -> K(+)K(-)p Reaction near Threshold

저자: 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.

DOI: 10.1103/PhysRevLett.116.232001

발행일: 2016-06-07

유형: Article

저널명: Physical Review Letters

권: 116

호: 23

언어: ENG

출판사: AMER PHYSICAL SOC

발행국가: 미국

ISSN: E 1079-7114
P 0031-9007