In order to study the structure of neutralino star and dark galaxy, we consider dynamical interactions due to boson-exchange in the neutralino matter. Taking into account interactions of neutralinos with bosons, we de...In order to study the structure of neutralino star and dark galaxy, we consider dynamical interactions due to boson-exchange in the neutralino matter. Taking into account interactions of neutralinos with bosons, we derive the equation of state （EOS） of neutralino stars in terms of the relativistic mean-field approach. Then we apply the resulting EOS to investigate properties of the neutralino star such as its density profile and mass limit. For example, if the neutralino mass is around 1 TeV, the Oppenheimer mass limit of the neutralino star is obtained as 6.06 ×10^-7 M⊙, and the corresponding radius is about 7.8 mm. Actually, due to an increasing annihilation rate as indicated by our calculation, this dense state can never be realized in practice. Our results also show that the low-density neutralino star may be a possible aggregation of the cold dark matter.展开更多
The dependence on the momentum transfer of the spin-dependent cross sec-tion of weakly interacting massive particles(WIMPs) is studied in a single particlemodel.Results are obtained for various candidate detector nuclei.
There exists an infinite number of quarks u(∞) and anti-quarks at an infinite sub-layer level. These particles are considered as the ultimate building blocks of the universe, since they are structure-less and a...There exists an infinite number of quarks u(∞) and anti-quarks at an infinite sub-layer level. These particles are considered as the ultimate building blocks of the universe, since they are structure-less and absolutely stable. These particles are also regarded as the non-baryonic dark matter, since the baryon number is zero and the R<sub>p</sub>-parity is -1. It is emphasized that supersymmetric particle, neutralino has also the R<sub>p</sub>-parity of -1 and well known good cold dark matter candidate. In modern particle physics, all ordinary particles have the R<sub>p</sub>-parity of +1, while both the ultimate quark u(∞) and neutralino have the R<sub>p</sub>-parity of -1. This means that these particles can only be created or annihilated in pairs in reactions of ordinary particles. From electron-positron annihilation experiments at high energies, it is shown that the prediction value from the ultimate quark u(∞) is in good agreement with many ring-storage collider experiments.展开更多
基金The project partly supported by National Natural Science Foundation of China
文摘In order to study the structure of neutralino star and dark galaxy, we consider dynamical interactions due to boson-exchange in the neutralino matter. Taking into account interactions of neutralinos with bosons, we derive the equation of state （EOS） of neutralino stars in terms of the relativistic mean-field approach. Then we apply the resulting EOS to investigate properties of the neutralino star such as its density profile and mass limit. For example, if the neutralino mass is around 1 TeV, the Oppenheimer mass limit of the neutralino star is obtained as 6.06 ×10^-7 M⊙, and the corresponding radius is about 7.8 mm. Actually, due to an increasing annihilation rate as indicated by our calculation, this dense state can never be realized in practice. Our results also show that the low-density neutralino star may be a possible aggregation of the cold dark matter.
基金The project supported by the National Natural Science Foundation of China and the State Education Commission.
文摘The dependence on the momentum transfer of the spin-dependent cross sec-tion of weakly interacting massive particles(WIMPs) is studied in a single particlemodel.Results are obtained for various candidate detector nuclei.
文摘There exists an infinite number of quarks u(∞) and anti-quarks at an infinite sub-layer level. These particles are considered as the ultimate building blocks of the universe, since they are structure-less and absolutely stable. These particles are also regarded as the non-baryonic dark matter, since the baryon number is zero and the R<sub>p</sub>-parity is -1. It is emphasized that supersymmetric particle, neutralino has also the R<sub>p</sub>-parity of -1 and well known good cold dark matter candidate. In modern particle physics, all ordinary particles have the R<sub>p</sub>-parity of +1, while both the ultimate quark u(∞) and neutralino have the R<sub>p</sub>-parity of -1. This means that these particles can only be created or annihilated in pairs in reactions of ordinary particles. From electron-positron annihilation experiments at high energies, it is shown that the prediction value from the ultimate quark u(∞) is in good agreement with many ring-storage collider experiments.
