Interference Effect between φ and Λ (1520) Production Channels in the γp →k+K-p Reaction near Threshold

(LEPS Collaboration)

doi:10.1103/PhysRevLett.116.232001

Interference Effect between φ and Λ (1520) Production Channels in the γp →k+K-p Reaction near Threshold

(LEPS Collaboration)

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The φ-Λ(1520) interference effect in the γp→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 φ and Λ(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 s=2.1 GeV bump structure in forward differential cross sections for φ 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.

Original language	English
Article number	232001
Journal	Physical review letters
Volume	116
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.116.232001
Publication status	Published - 2016 Jun 7

Bibliographical note

Publisher Copyright:
© 2016 American Physical Society.

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.116.232001

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@article{6eaf4f1c479c434d8b614c822836ba64,

title = "Interference Effect between φ and Λ (1520) Production Channels in the γp →k+K-p Reaction near Threshold",

abstract = "The φ-Λ(1520) interference effect in the γp→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 φ and Λ(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 s=2.1 GeV bump structure in forward differential cross sections for φ 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.",

author = "{(LEPS Collaboration)} and Ryu, {S. Y.} and Ahn, {J. K.} and T. Nakano and Ahn, {D. S.} and S. Ajimura and H. Akimune and Y. Asano and Chang, {W. C.} and Chen, {J. Y.} and S. Dat{\'e} 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 Hwang, {S. H.} 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 Lin, {P. J.} 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 Nam, {S. I.} and M. Niiyama and M. Nomachi and Y. Ohashi and H. Ohkuma and T. Ohta and T. Ooba and Oshuev, {D. S.} and Parker, {J. D.} and C. Rangacharyulu",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = jun,

day = "7",

doi = "10.1103/PhysRevLett.116.232001",

language = "English",

volume = "116",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "23",

}

TY - JOUR

T1 - Interference Effect between φ and Λ (1520) Production Channels in the γp →k+K-p Reaction near Threshold

AU - (LEPS Collaboration)

AU - Ryu, S. Y.

AU - Ahn, J. K.

AU - Nakano, T.

AU - Ahn, D. S.

AU - Ajimura, S.

AU - Akimune, H.

AU - Asano, Y.

AU - Chang, W. C.

AU - Chen, J. Y.

AU - Daté, S.

AU - Ejiri, H.

AU - Fujimura, H.

AU - Fujiwara, M.

AU - Fukui, S.

AU - Hasegawa, S.

AU - Hicks, K.

AU - Horie, K.

AU - Hotta, T.

AU - Hwang, S. H.

AU - Imai, K.

AU - Ishikawa, T.

AU - Iwata, T.

AU - Kato, Y.

AU - Kawai, H.

AU - Kino, K.

AU - Kohri, H.

AU - Kon, Y.

AU - Kumagai, N.

AU - Lin, P. J.

AU - Maeda, Y.

AU - Makino, S.

AU - Matsuda, T.

AU - Matsuoka, N.

AU - Mibe, T.

AU - Miyabe, M.

AU - Miyachi, M.

AU - Morino, Y.

AU - Muramatsu, N.

AU - Murayama, R.

AU - Nakatsugawa, Y.

AU - Nam, S. I.

AU - Niiyama, M.

AU - Nomachi, M.

AU - Ohashi, Y.

AU - Ohkuma, H.

AU - Ohta, T.

AU - Ooba, T.

AU - Oshuev, D. S.

AU - Parker, J. D.

AU - Rangacharyulu, C.

PY - 2016/6/7

Y1 - 2016/6/7

N2 - The φ-Λ(1520) interference effect in the γp→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 φ and Λ(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 s=2.1 GeV bump structure in forward differential cross sections for φ 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.

AB - The φ-Λ(1520) interference effect in the γp→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 φ and Λ(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 s=2.1 GeV bump structure in forward differential cross sections for φ 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.

UR - http://www.scopus.com/inward/record.url?scp=84974633343&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.116.232001

DO - 10.1103/PhysRevLett.116.232001

M3 - Article

AN - SCOPUS:84974633343

SN - 0031-9007

VL - 116

JO - Physical review letters

JF - Physical review letters

IS - 23

M1 - 232001

ER -

Interference Effect between φ and Λ (1520) Production Channels in the γp →k+K-p Reaction near Threshold

Abstract

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ASJC Scopus subject areas

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