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题名: Time delays of strings in D-particle backgrounds and vacuum refractive indices
作者: Li, Tianjun ;  Mavromatos, Nick E. ;  Nanopoulos, Dimitri V. ;  Xie, Dan
刊名: PHYSICS LETTERS B
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
学科分类: Physics
通讯作者: Mavromatos, NE , Kings Coll London, Dept Phys, London WC2R 2LS, England
部门归属: [Mavromatos, NE] Kings Coll London, Dept Phys, London WC2R 2LS, England; [Li, TJ; Nanopoulos, DV; Xie, D] Texas A&M Univ, George P & Cynthia W Mitchell Inst Fundamental Ph, College Stn, TX 77843 USA; [Li, TJ] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China; [Nanopoulos, DV] Houston Adv Res Ctr, Astroparticle Phys Grp, The Woodlands, TX 77381 USA; [Nanopoulos, DV] Acad Athens, Div Nat Sci, Athens 10679, Greece
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.
资助者: Cambridge-Mitchell Collaboration in Theoretical Cosmology; Natural Science Foundation of China[10821504]; Chinese Academy of Sciences[KJCX3-SYW-N2]; European Union through the Marie Curie Research and Training Network UniverseNet[MRTN-2006-035863]; DOE[DE-FG02-95ER40917]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000269989800022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5255
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Li, Tianjun,Mavromatos, Nick E.,Nanopoulos, Dimitri V.,et al. Time delays of strings in D-particle backgrounds and vacuum refractive indices[J]. PHYSICS LETTERS B,2009,679(4):407-413.
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