Study of ΛΛ dynamics and ground state structure of low and medium mass double Λ hypernuclei |
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Authors: | MD Abdul Khan Tapan Kumar Das |
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Institution: | (1) Department of Physics, University of Calcutta, 92, Acharya Prafulla Chandra Road, 700 009 Calcutta, India |
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Abstract: | We critically review the ΛΛ dynamics by examining Λ - Λ and Λ-nucleon phenomenological potentials in the study of the bound
state properties of double-Λ hypernuclei
ΛΛ
6
He,
ΛΛ
10
Be,
ΛΛ
14
C,
ΛΛ
18
O,
ΛΛ
22
Ne,
ΛΛ
26
Mg,
ΛΛ
30
Si,
ΛΛ
34
S,
ΛΛ
38
Ar,
ΛΛ
42
Ca,
ΛΛ
46
Ti,
ΛΛ
50
Cr,
ΛΛ
54
Fe,
ΛΛ
58
Ni,
ΛΛ
62
Zn,
ΛΛ
66
Ge,
ΛΛ
70
Se,
ΛΛ
74
Kr,
ΛΛ
78
Sr,
ΛΛ
82
Zr,
ΛΛ
86
Mo,
ΛΛ
90
Ru,
ΛΛ
94
Pd,
ΛΛ
98
Cd,
ΛΛ
102
Sn in the frame work of (core+Λ+Λ) three body model. An effective ΛN potential is obtained by folding the phenomenological ΛN potential into the density distribution of the core nuclei. The former two cases (i.e.
ΛΛ
6
He and
ΛΛ
10
Be) are revisited to justify the correctness of the present potential model. Assuming the same potential model we predicted
some of the structural properties of heavier doubly Λ-hypernuclei. The hyperspherical harmonics expansion method, which is
an essentially exact method has been employed for the three body system. A convergence in binding energy up to 0.15% for K
max=20 has been achieved. In our calculation we have made no approximation in restricting the allowed l-values of the interacting pairs. |
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Keywords: | Hypernuclei Raynal Revai coefficient hyperspherical harmonics expansion hyperspherical harmonics |
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