Pionic decay of a possible d{sup {prime}} dibaryon and the short-range NN interaction

Journal Article · Mon Dec 01 00:00:00 EST 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.56.3295· OSTI ID:679090

Obukhovsky, I T ^[1]; Itonaga, K; Wagner, Georg; Buchmann, A J; Faessler, Amand ^[2]

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1. Institute of Nuclear Physics, Moscow State University, 119899 Moscow (Russia)
2. Institute for Theoretical Physics, University of Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)

We study the pionic decay of a possible dibaryon d{sup {prime}}{r_arrow}N+N+{pi} in the microscopic quark shell model. The initial d{sup {prime}} dibaryon wave function (J{sup P}=0{sup {minus}}, T=0) consists of one 1{h_bar}{omega} six-quark shell-model s{sup 5}p[51]{sub X} configuration. The most important final six-quark configurations s{sup 6}[6]{sub X}, s{sup 4}p{sup 2}[42]{sub X}, and (s{sup 4}p{sup 2}{minus}s{sup 5}2s)[6]{sub X} are properly projected onto the NN channel. The final state NN interaction is investigated by means of two phase-equivalent{emdash}but off-shell different{emdash}potential models. We demonstrate that the decay width {Gamma}{sub d{sup {prime}}} depends strongly on the short-range behavior of the NN wave function. In addition, the width {Gamma}{sub d{sup {prime}}} is very sensitive to the mass and size of the d{sup {prime}} dibaryon. For dibaryon masses slightly above the experimentally suggested value M{sub d{sup {prime}}}=2.065GeV, we obtain a pionic decay width of {Gamma}{sub d{sup {prime}}}{approx}0.18{endash}0.32MeV close to the experimental value {Gamma}{sub d{sup {prime}}}{approx}0.5MeV. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 679090
• Journal Information: Physical Review, C, Vol. 56, Issue 6; Other Information: PBD: Dec 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DIBARYONS
WEAK HADRONIC DECAY
QUARK MODEL
SHELL MODELS
WAVE FUNCTIONS
PIONS
MASS
NUCLEON-NUCLEON INTERACTIONS