Pentaquark Theta+ in nuclear matter and Theta+ hypernuclei

Shen, H.; Toki, H.

doi:10.1103/PhysRevC.71.065208

Pentaquark Theta+ in nuclear matter and Theta+ hypernuclei

H. Shen
(
- Nankai U.
)
,
H. Toki
(
- Osaka U., Res. Ctr. Nucl. Phys.
)

Oct, 2004

15 pages

Published in:

Phys.Rev.C 71 (2005) 065208

e-Print:

nucl-th/0410072 [nucl-th]

DOI:

10.1103/PhysRevC.71.065208

View in:

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Abstract:

We study the properties of the

\Theta^+

in nuclear matter and

\Theta^+

hypernuclei within the quark mean-field (QMF) model, which has been successfully used for the description of ordinary nuclei and

\Lambda

hypernuclei. With the assumption that the non-strange mesons couple only to the

u

and

d

quarks inside baryons, a sizable attractive potential of the

\Theta^+

in nuclear matter is achieved as a consequence of the cancellation between the attractive scalar potential and the repulsive vector potential. We investigate the

\Theta^+

single-particle energies in light, medium, and heavy nuclei. More bound states are obtained in

\Theta^+

hypernuclei in comparison with those in

\Lambda

hypernuclei.

21.30.Fe
21.65.+f
21.60.-n
21.80.-a
Theta(1540): mass
Theta(1540): form factor
nuclear matter
Theta(1540): hypernucleus
energy levels
quark: mean field approximation

References(18)

Figures(0)

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