Time delays of strings in D-particle backgrounds and vacuum refractive indices
文献类型：期刊论文
| 作者 | Nanopoulos, Dimitri V.; Xie, Dan; Mavromatos, NE , Kings Coll London, Dept Phys, London WC2R 2LS, England; Li, Tianjun ; Mavromatos, Nick E.
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| 刊名 | PHYSICS LETTERS B
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| 出版日期 | 2009 |
| 卷号 | 679期号:4页码:407-413 |
| 关键词 | Gamma-ray Bursts Quantum-gravity Foam Violation Principle |
| ISSN号 | 0370-2693 |
| 英文摘要 | Using standard techniques in string/D-brane scattering amplitude computations, we evaluate the scattering of open strings off D-particles in brane world scenarios. The D-particles are viewed as D3 branes wrapped Lip around three cycles, and their embedding in brane worlds constitutes a case of intersecting branes, among which strings are stretched, representing various types of excitations of the Standard Model (SM) particles in the low-energy limit. Our analysis, reveals interesting and novel selection rules for the resulting causal time delays, proportional to the energy of the incident matter state. from the processes of splitting, capture and re-emission of the latter by the D-particles. There are relatively large time delays only for excitations that belong to the Cartan subalgebra of the SM gauge group, which notably includes photons. We discuss the possible relevance of these results to models of space time foarn with non-trivial vacuum refractive index for photons and demonstrate how current astrophysical observations can be used to discriminate low- from high-string-scale models in this context. (C) 2009 Elsevier B.V. All rights reserved. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000269989800022 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5255]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Mavromatos, NE , Kings Coll London, Dept Phys, London WC2R 2LS, England |
| 推荐引用方式 GB/T 7714 | Nanopoulos, Dimitri V.,Xie, Dan,Mavromatos, NE , Kings Coll London, Dept Phys, London WC2R 2LS, England,et al. Time delays of strings in D-particle backgrounds and vacuum refractive indices[J]. PHYSICS LETTERS B,2009,679(4):407-413. |
| APA | Nanopoulos, Dimitri V.,Xie, Dan,Mavromatos, NE , Kings Coll London, Dept Phys, London WC2R 2LS, England,Li, Tianjun,&Mavromatos, Nick E..(2009).Time delays of strings in D-particle backgrounds and vacuum refractive indices.PHYSICS LETTERS B,679(4),407-413. |
| MLA | Nanopoulos, Dimitri V.,et al."Time delays of strings in D-particle backgrounds and vacuum refractive indices".PHYSICS LETTERS B 679.4(2009):407-413. |
入库方式： OAI收割
来源：理论物理研究所
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