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Title: Faddeev calculation of pentaquark Theta+ in the Nambu-Jona-Lasinio model-based diquark picture

Journal Article · · Physical Review C

A Bethe-Salpeter-Faddeev (BSF) calculation is performed for the pentaquark $$\Theta^+$$ in the diquark picture of Jaffe and Wilczek in which $$\Theta^+$$ is a diquark-diquark-$${\bar s}$$ three-body system. Nambu-Jona-Lasinio (NJL) model is used to calculate the lowest order diagrams in the two-body scatterings of $${\bar s}D$$ and $D D$. With the use of coupling constants determined from the meson sector, we find that $${\bar s}D$$ interaction is attractive in s-wave while $DD$ interaction is repulsive in p-wave. With only the lowest three-body channel considered, we do not find a bound $$ \frac 12^+$$ pentaquark state. Instead, a bound pentaquark $$\Theta^+$$ with $$ \frac 12^-$$ is obtained with a unphysically strong vector mesonic coupling constants.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-060R23177
OSTI ID:
955890
Report Number(s):
JLAB-THY-08-824; arXiv:0710.0196; DOE/OR/23177-0384; PRVCAN; TRN: US1004803
Journal Information:
Physical Review C, Vol. 77; ISSN 0556-2813
Country of Publication:
United States
Language:
English

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Search for the <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>Θ</mml:mi><mml:msup><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mn>1540</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mo>+</mml:mo></mml:msup></mml:math> pentaquark using kaon secondary interactions at Belle journal January 2006
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