Search for exotic baryons in double radiative capture on pionic hydrogen

P. A. Zołnierczuk; D. S. Armstrong; E. Christy; J. H.D. Clark; T. P. Gorringe; M. D. Hasinoff; M. A. Kovash; S. Tripathi; D. H. Wright

doi:10.1016/j.physletb.2004.07.008

Search for exotic baryons in double radiative capture on pionic hydrogen

P. A. Zołnierczuk, D. S. Armstrong, E. Christy, J. H.D. Clark, T. P. Gorringe, M. D. Hasinoff, M. A. Kovash, S. Tripathi, D. H. Wright

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2 Scopus citations

Abstract

We report a search for low-lying exotic baryons via double radiative capture on pionic hydrogen. The data were collected at the TRIUMF cyclotron using the RMC spectrometer by detecting gamma-ray pairs from pion stops in liquid hydrogen. We found no evidence to support an earlier claim for exotic baryons of masses 1004 and 1044 MeV/c ², and set upper limits on exotic baryon mediated capture of <3×10 ^-6 and <4×10 ^-6, respectively. We also obtained bounds on the couplings between exotic baryons and ordinary nucleons.

Original language	English
Pages (from-to)	131-138
Number of pages	8
Journal	Physics Letters B
Volume	597
Issue number	2
DOIs	https://doi.org/10.1016/j.physletb.2004.07.008
State	Published - Sep 9 2004
Externally published	Yes

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title = "Search for exotic baryons in double radiative capture on pionic hydrogen",

abstract = "We report a search for low-lying exotic baryons via double radiative capture on pionic hydrogen. The data were collected at the TRIUMF cyclotron using the RMC spectrometer by detecting gamma-ray pairs from pion stops in liquid hydrogen. We found no evidence to support an earlier claim for exotic baryons of masses 1004 and 1044 MeV/c 2, and set upper limits on exotic baryon mediated capture of <3×10 -6 and <4×10 -6, respectively. We also obtained bounds on the couplings between exotic baryons and ordinary nucleons.",

author = "Zo{\l}nierczuk, {P. A.} and Armstrong, {D. S.} and E. Christy and Clark, {J. H.D.} and Gorringe, {T. P.} and Hasinoff, {M. D.} and Kovash, {M. A.} and S. Tripathi and Wright, {D. H.}",

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T1 - Search for exotic baryons in double radiative capture on pionic hydrogen

AU - Zołnierczuk, P. A.

AU - Armstrong, D. S.

AU - Christy, E.

AU - Clark, J. H.D.

AU - Gorringe, T. P.

AU - Hasinoff, M. D.

AU - Kovash, M. A.

AU - Tripathi, S.

AU - Wright, D. H.

PY - 2004/9/9

Y1 - 2004/9/9

N2 - We report a search for low-lying exotic baryons via double radiative capture on pionic hydrogen. The data were collected at the TRIUMF cyclotron using the RMC spectrometer by detecting gamma-ray pairs from pion stops in liquid hydrogen. We found no evidence to support an earlier claim for exotic baryons of masses 1004 and 1044 MeV/c 2, and set upper limits on exotic baryon mediated capture of <3×10 -6 and <4×10 -6, respectively. We also obtained bounds on the couplings between exotic baryons and ordinary nucleons.

AB - We report a search for low-lying exotic baryons via double radiative capture on pionic hydrogen. The data were collected at the TRIUMF cyclotron using the RMC spectrometer by detecting gamma-ray pairs from pion stops in liquid hydrogen. We found no evidence to support an earlier claim for exotic baryons of masses 1004 and 1044 MeV/c 2, and set upper limits on exotic baryon mediated capture of <3×10 -6 and <4×10 -6, respectively. We also obtained bounds on the couplings between exotic baryons and ordinary nucleons.

UR - http://www.scopus.com/inward/record.url?scp=4143096855&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2004.07.008

DO - 10.1016/j.physletb.2004.07.008

M3 - Article

AN - SCOPUS:4143096855

SN - 0370-2693

VL - 597

SP - 131

EP - 138

JO - Physics Letters B

JF - Physics Letters B

IS - 2

ER -

Search for exotic baryons in double radiative capture on pionic hydrogen

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