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Double-strangeness five-body system

Technical Report:

Abstract

We perform theoretical analysis on the structure and decay of a double-strangeness five-body system which consists of {sub {Lambda}{Lambda}}{sup 5}H and {sub {identical_to}}{sup 5}H states. In this S=-2 five-body system the thresholds of the t{Lambda}{Lambda} channel and the {alpha}{identical_to}{sup -} channel come closer with only 8.51 MeV difference. We treat both bound and resonant states of the three-body channels t{Lambda}{Lambda} and tp{identical_to}{sup -} by applying a complex rotation method. It is found that there is a bound {sub {Lambda}{Lambda}}{sup 5}H state with 6.3 MeV below the threshold of t+{Lambda}+{Lambda}. In the {identical_to}{sup -} channel a resonant {sub {identical_to}}{sup 5}H state appears at 1.7 MeV below the threshold of {alpha}+{identical_to}{sup -}. Though the existence of this state is ensured by the Coulomb interaction, it is a `halo` nuclear state rather than an atomic state as judged from its size. The conversion width of this state is 0.2 MeV which is extremely narrow. It is also found that {identical_to} mixing into the {sub {Lambda}{Lambda}}{sup 5}H ground state is small with 1.0 %. For the {sub {Lambda}{Lambda}}{sup 5}H state, the weak decay to the {alpha}+{Sigma}{sup -} final state produces a high mono-energetic {Sigma}{sup -} with branching ratio of 5.5 %. Thus the {Sigma}{sup  More>>
Authors:
Myint, K S; [1]  Akaishi, Yoshinori
  1. Mandalay Univ. (Myanmar). Dept. of Physics
Publication Date:
Sep 01, 1994
Product Type:
Technical Report
Report Number:
INS-1055
Reference Number:
SCA: 662360; PA: JPN-94:012185; EDB-95:025860; SN: 95001319993
Resource Relation:
Other Information: PBD: Sep 1994
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; STRANGENESS; MANY-BODY PROBLEM; DECAY; LAMBDA PARTICLES; XI PARTICLES; NUCLEAR STRUCTURE; NUCLEAR MODELS; 662360; DECAYS OF BARYONS
OSTI ID:
10109344
Research Organizations:
Tokyo Univ., Tanashi (Japan). Inst. for Nuclear Study
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE95737277; TRN: JP9412185
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
25 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Myint, K S, and Akaishi, Yoshinori. Double-strangeness five-body system. Japan: N. p., 1994. Web.
Myint, K S, & Akaishi, Yoshinori. Double-strangeness five-body system. Japan.
Myint, K S, and Akaishi, Yoshinori. 1994. "Double-strangeness five-body system." Japan.
@misc{etde_10109344,
title = {Double-strangeness five-body system}
author = {Myint, K S, and Akaishi, Yoshinori}
abstractNote = {We perform theoretical analysis on the structure and decay of a double-strangeness five-body system which consists of {sub {Lambda}{Lambda}}{sup 5}H and {sub {identical_to}}{sup 5}H states. In this S=-2 five-body system the thresholds of the t{Lambda}{Lambda} channel and the {alpha}{identical_to}{sup -} channel come closer with only 8.51 MeV difference. We treat both bound and resonant states of the three-body channels t{Lambda}{Lambda} and tp{identical_to}{sup -} by applying a complex rotation method. It is found that there is a bound {sub {Lambda}{Lambda}}{sup 5}H state with 6.3 MeV below the threshold of t+{Lambda}+{Lambda}. In the {identical_to}{sup -} channel a resonant {sub {identical_to}}{sup 5}H state appears at 1.7 MeV below the threshold of {alpha}+{identical_to}{sup -}. Though the existence of this state is ensured by the Coulomb interaction, it is a `halo` nuclear state rather than an atomic state as judged from its size. The conversion width of this state is 0.2 MeV which is extremely narrow. It is also found that {identical_to} mixing into the {sub {Lambda}{Lambda}}{sup 5}H ground state is small with 1.0 %. For the {sub {Lambda}{Lambda}}{sup 5}H state, the weak decay to the {alpha}+{Sigma}{sup -} final state produces a high mono-energetic {Sigma}{sup -} with branching ratio of 5.5 %. Thus the {Sigma}{sup -} with discrete energy would become a clear signature of the forming of the {Lambda}{Lambda} hypernucleus. (author).}
place = {Japan}
year = {1994}
month = {Sep}
}