Observation of a narrow structure in 1 H( γ , KS0 ) X via interference with φ -meson production

Amaryan, M. J.; Gavalian, G.; Nepali, C.; Polyakov, M. V.; Azimov, Ya.; Briscoe, W. J.; Dodge, G. E.; Hyde, C. E.; Klein, F.; Kuznetsov, V.; Strakovsky, I.; Zhang, J.

doi:10.1103/PhysRevC.85.035209

Title: Observation of a narrow structure in $^{1}$ H( $γ$ , $K_{S}^{0}$ ) $X$ via interference with $φ$ -meson production

Journal Article · Thu Mar 01 00:00:00 EST 2012 · Physical Review C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.85.035209· OSTI ID:1038249

Amaryan, M. J.; Gavalian, G.; Nepali, C.; Polyakov, M. V.; Azimov, Ya.; Briscoe, W. J.; Dodge, G. E.; Hyde, C. E.; Klein, F.; Kuznetsov, V.; Strakovsky, I.; Zhang, J.

We report observation of a narrow peak structure at ≈1.54 GeV with a Gaussian width σ = 6 MeV in the missing mass of K_S in the reaction γ + p → pK_SK_L. The observed structure may be due to the interference between a strange (or antistrange) baryon resonance in the pK_L system and the φ(K_SK_L) photoproduction leading to the same final state. The statistical significance of the observed excess of events estimated as the log-likelihood ratio of the resonant signal + background hypothesis and the φ-production-based background-only hypothesis corresponds to 5.3σ.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 1038249

Report Number(s):: JLAB-PHY-12-1500; DOE/OR/23177-2042; arXiv:1110.3325; PRVCAN; TRN: US1201835

Journal Information:: Physical Review C, Nuclear Physics, Vol. 85, Issue 3; ISSN 0556-2813

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 20 works

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Present status on experimental search for pentaquarks Liu, Tianbo; Mao, Yajun; Ma, Bo-Qiang International Journal of Modern Physics A, Vol. 29, Issue 13 https://doi.org/10.1142/s0217751x14300208	journal	May 2014

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Title: Observation of a narrow structure in 1 H( γ , K S 0 ) X via interference with φ -meson production

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Title: Observation of a narrow structure in $^{1}$ H( $γ$ , $K_{S}^{0}$ ) $X$ via interference with $φ$ -meson production