2009
DOI: 10.1103/physrevlett.103.012001
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Abstract: Photoproduction of Lambda(1520) with liquid hydrogen and deuterium targets was examined at photon energies below 2.4 GeV in the SPring-8 LEPS experiment. For the first time, the differential cross sections were measured at low energies and with a deuterium target. A large asymmetry of the production cross sections from protons and neutrons was observed at backward K+/0 angles. This suggests the importance of the contact term, which coexists with t-channel K exchange under gauge invariance. This interpretation … Show more

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Cited by 39 publications
(59 citation statements)
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“…However, the angular distribution of the bump is not well reproduced. The theoretical calculations estimate the cross sections at backward K þ angles to be about 0:7 b that overestimates the experimental cross sections [25] by 2-3 times. The bump is not observed in the cross sections of the backward K þ angles [25].…”
mentioning
confidence: 82%
“…However, the angular distribution of the bump is not well reproduced. The theoretical calculations estimate the cross sections at backward K þ angles to be about 0:7 b that overestimates the experimental cross sections [25] by 2-3 times. The bump is not observed in the cross sections of the backward K þ angles [25].…”
mentioning
confidence: 82%
“…The only data comparison available is the LEPS Collaboration result by Niiyama et al [24] [13]. The hollow circular points show separate LEPS results [14]; in the lowest W bin they are for W = 2.01 GeV (red), 2.03 GeV (blue), and 2.05 GeV (green).…”
Section: Results For λ(1405)mentioning
confidence: 99%
“…In more recent times, the LEPS Collaboration has looked at photoproduction of this hyperon in the energy region 1.9 < E γ < 2.8 GeV using a forward-angle spectrometer [13,14]. They showed that the cross section is forward peaked, and that this behavior is more consistent with a model dominated by a gauge-invariance-preserving contact term [15,16], and less consistent with models dominated by t−channel vector meson K * exchange [17,18].…”
Section: Past Experiments and Current Theorymentioning
confidence: 93%
See 1 more Smart Citation
“…The LEPS spectrometer was designed to efficiently detect φ -mesons decaying to K + and K − at forward angles [1,2,3,4,5]. Not only φ but also K + photoproduction reactions are extensively studied [6,7,8,9,10,11,12,13].…”
Section: Introductionmentioning
confidence: 99%