Near-threshold Lambda(1520) production by the gamma(p)-->K{+}Lambda(1520) reaction at forward K+ angles.
Differential cross sections and photon-beam asymmetries for the gamma(p)-->K{+}Lambda(1520) reaction have been measured with linearly polarized photon beams at energies from the threshold to 2.4 GeV at 0.6<cos(theta){c.m.}{K}<1. A new bump structure was found at W approximately 2.11 GeV in the cross sections. The bump is not well reproduced by theoretical calculations introducing a nucleon resonance with J<or=3/2. This result suggests that the bump might be produced by a nucleon resonance possibly with J>or=5/2 or by a new reaction process, for example, an interference effect with the phi photoproduction having a similar bump structure in the cross sections.
Kohri
H
H
Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
Ahn
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Ahn
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Akimune
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Asano
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Chang
W C
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Daté
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Ejiri
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Fukui
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Fujimura
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Fujiwara
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Hasegawa
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Hicks
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K
Hosaka
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Hotta
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Imai
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Ishikawa
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Iwata
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Kawai
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Kim
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Kino
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K
Kumagai
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N
Makino
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Matsuda
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Matsumura
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Matsuoka
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N
Mibe
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T
Miyabe
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Miyachi
Y
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Morita
M
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Muramatsu
N
N
Nakano
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Nam
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SI
Niiyama
M
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Nomachi
M
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Ohashi
Y
Y
Ohkuma
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Ooba
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Oshuev
D S
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Rangacharyulu
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C
Sakaguchi
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Sasaki
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Shagin
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Shiino
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Shimizu
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Shimizu
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Sugaya
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Sumihama
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Titov
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Toi
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Toyokawa
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Wakai
A
A
Wang
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Wang
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Yonehara
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Yorita
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Yoshimura
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Yosoi
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Zegers
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