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| Content Provider | Springer Nature Link |
|---|---|
| Author | Xu, Yan Liu, Guang Zhou Liu, Cheng Zhi Fan, Cun Bo Han, Xing Wei Zhang, Xiao Jun Wang, Hong Yan Zhu, Ming Feng Meng, Yu |
| Copyright Year | 2013 |
| Abstract | The presence of the isovector scalar interaction in neutron star matter is considered by exchanging δ meson; we study the effects of δ mesons on the direct Urca processes involving hyperons. The calculation is based on the framework of the relativistic mean field theory. By our analysis, the hyperon direct Urca processes under beta equilibrium are open at lower densities due to δ mesons, which create a larger energy gap between two baryons in the reactions. The δ meson leads to an obvious enhancement of the neutrino emissivity for the hyperon direct Urca processes. In particular, the relativistic neutrino emissivity is found to be substantially larger than predicted in the non-relativistic approach whether δ mesons appear in an neutron star or not. In our results, δ mesons not only change the baryons properties, but also result in more rapid cooling rate of neutron stars by hyperon direct Urca processes. |
| Starting Page | 273 |
| Ending Page | 278 |
| Page Count | 6 |
| File Format | |
| ISSN | 10016538 |
| Journal | Chinese Science Bulletin |
| Volume Number | 59 |
| Issue Number | 3 |
| e-ISSN | 18619541 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2013-12-31 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | Science Life Sciences Physics Chemistry/Food Science Earth Sciences Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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