Search for d* dibaryon by double-radiative capture on pionic deuterium

P. A. Zołnierczuk; T. P. Gorringe; M. D. Hasinoff; M. A. Kovash; S. Tripathi; D. H. Wright

doi:10.1016/S0370-2693(02)02932-5

Search for d* dibaryon by double-radiative capture on pionic deuterium

P. A. Zołnierczuk, T. P. Gorringe, M. D. Hasinoff, M. A. Kovash, S. Tripathi, D. H. Wright

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

7 Scopus citations

Abstract

We report a search for d* dibaryon production by double-radiative capture on pionic deuterium. The experiment was conducted at the TRIUMF cyclotron using the RMC cylindrical pair spectrometer, and detected γ-ray coincidences following pion stops in liquid deuterium. We found no evidence for narrow dibaryons, and obtained a branching ratio upper limit, BR < 6.7 × 10^-6 (90% C.L.), for narrow d* production in the mass range from 1920 to 1980 MeV.

Original language	English
Pages (from-to)	301-306
Number of pages	6
Journal	Physics Letters B
Volume	549
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(02)02932-5
State	Published - Dec 5 2002
Externally published	Yes

Funding

We wish to thank the staff of the TRIUMF laboratory for their support of this work. In particular we acknowledge the help of Dr. Renée Poutissou on the data acquisition and Dr. Dennis Healey on the cryogenic targets. In addition we thank Prof. Sergo B. Gerasimov for helpful and stimulating discussions, Prof. David S. Armstrong for carefully reading the manuscript and the National Science Foundation (United States) and the Natural Sciences and Engineering Research Council (Canada) for financial support.

Funders	Funder number
National Science Foundation
Natural Sciences and Engineering Research Council of Canada

Keywords

Dibaryon
Double-radiative capture
Pionic deuterium

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10.1016/S0370-2693(02)02932-5

Cite this

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title = "Search for d* dibaryon by double-radiative capture on pionic deuterium",

abstract = "We report a search for d* dibaryon production by double-radiative capture on pionic deuterium. The experiment was conducted at the TRIUMF cyclotron using the RMC cylindrical pair spectrometer, and detected γ-ray coincidences following pion stops in liquid deuterium. We found no evidence for narrow dibaryons, and obtained a branching ratio upper limit, BR < 6.7 × 10-6 (90% C.L.), for narrow d* production in the mass range from 1920 to 1980 MeV.",

keywords = "Dibaryon, Double-radiative capture, Pionic deuterium",

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T1 - Search for d* dibaryon by double-radiative capture on pionic deuterium

AU - Zołnierczuk, P. A.

AU - Gorringe, T. P.

AU - Hasinoff, M. D.

AU - Kovash, M. A.

AU - Tripathi, S.

AU - Wright, D. H.

PY - 2002/12/5

Y1 - 2002/12/5

N2 - We report a search for d* dibaryon production by double-radiative capture on pionic deuterium. The experiment was conducted at the TRIUMF cyclotron using the RMC cylindrical pair spectrometer, and detected γ-ray coincidences following pion stops in liquid deuterium. We found no evidence for narrow dibaryons, and obtained a branching ratio upper limit, BR < 6.7 × 10-6 (90% C.L.), for narrow d* production in the mass range from 1920 to 1980 MeV.

AB - We report a search for d* dibaryon production by double-radiative capture on pionic deuterium. The experiment was conducted at the TRIUMF cyclotron using the RMC cylindrical pair spectrometer, and detected γ-ray coincidences following pion stops in liquid deuterium. We found no evidence for narrow dibaryons, and obtained a branching ratio upper limit, BR < 6.7 × 10-6 (90% C.L.), for narrow d* production in the mass range from 1920 to 1980 MeV.

KW - Dibaryon

KW - Double-radiative capture

KW - Pionic deuterium

UR - http://www.scopus.com/inward/record.url?scp=0037027973&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(02)02932-5

DO - 10.1016/S0370-2693(02)02932-5

M3 - Article

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SN - 0370-2693

VL - 549

SP - 301

EP - 306

JO - Physics Letters B

JF - Physics Letters B

IS - 3-4

ER -

Search for d* dibaryon by double-radiative capture on pionic deuterium

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Keywords

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