Observation of an exotic S = +1 baryon in
exclusive photoproduction from the deuteron

S. Stepanyan; Angela Biselli

doi:10.1103/PhysRevLett.91.252001

Observation of an exotic S = +1 baryon in exclusive photoproduction from the deuteron

S. Stepanyan, Angela Biselli

Fairfield University

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

Abstract

In an exclusive measurement of the reaction γd→K+K−pn, a narrow peak that can be attributed to an exotic baryon with strangeness S=+1 is seen in the K+n invariant mass spectrum. The peak is at 1.542±0.005 GeV/c2 with a measured width of 0.021 GeV/c2 FWHM, which is largely determined by experimental mass resolution. The statistical significance of the peak is (5.2±0.6)σ. The mass and width of the observed peak are consistent with recent reports of a narrow S=+1 baryon by other experimental groups.

Original language	American English
Journal	Physical Review Letters
Volume	91
DOIs	https://doi.org/10.1103/PhysRevLett.91.252001
State	Published - Jan 1 2003

Disciplines

Physical Sciences and Mathematics
Physics

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Observation of an exotic S 1 baryon inexclusive photoproductiFinal published version, 154 KBLicense: CC BY

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title = "Observation of an exotic S = +1 baryon in exclusive photoproduction from the deuteron",

abstract = " In an exclusive measurement of the reaction γd→K+K−pn, a narrow peak that can be attributed to an exotic baryon with strangeness S=+1 is seen in the K+n invariant mass spectrum. The peak is at 1.542±0.005 GeV/c2 with a measured width of 0.021 GeV/c2 FWHM, which is largely determined by experimental mass resolution. The statistical significance of the peak is (5.2±0.6)σ. The mass and width of the observed peak are consistent with recent reports of a narrow S=+1 baryon by other experimental groups.",

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doi = "10.1103/PhysRevLett.91.252001",

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N2 - In an exclusive measurement of the reaction γd→K+K−pn, a narrow peak that can be attributed to an exotic baryon with strangeness S=+1 is seen in the K+n invariant mass spectrum. The peak is at 1.542±0.005 GeV/c2 with a measured width of 0.021 GeV/c2 FWHM, which is largely determined by experimental mass resolution. The statistical significance of the peak is (5.2±0.6)σ. The mass and width of the observed peak are consistent with recent reports of a narrow S=+1 baryon by other experimental groups.

AB - In an exclusive measurement of the reaction γd→K+K−pn, a narrow peak that can be attributed to an exotic baryon with strangeness S=+1 is seen in the K+n invariant mass spectrum. The peak is at 1.542±0.005 GeV/c2 with a measured width of 0.021 GeV/c2 FWHM, which is largely determined by experimental mass resolution. The statistical significance of the peak is (5.2±0.6)σ. The mass and width of the observed peak are consistent with recent reports of a narrow S=+1 baryon by other experimental groups.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/94

U2 - 10.1103/PhysRevLett.91.252001

DO - 10.1103/PhysRevLett.91.252001

M3 - Article

VL - 91

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Observation of an exotic S = +1 baryon in exclusive photoproduction from the deuteron

Abstract

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