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Li, Tianjun; Mavromatos, Nick E.; Nanopoulos, Dimitri V.; Xie, Dan; Mavromatos, NE , Kings Coll London, Dept Phys, London WC2R 2LS, England
Time delays of strings in D-particle backgrounds and vacuum refractive indices
Source PublicationPHYSICS LETTERS B
KeywordGamma-ray Bursts Quantum-gravity Foam Violation Principle
AbstractUsing 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.
2009
ISSN0370-2693
Volume679Issue:4Pages:407-413
Subject AreaPhysics
Indexed BySCI
Funding OrganizationCambridge-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] ; 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] ; 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] ; 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]
Citation statistics
Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5255
Collection理论物理所科研产出_SCI论文
Corresponding AuthorMavromatos, NE , Kings Coll London, Dept Phys, London WC2R 2LS, England
Recommended Citation
GB/T 7714
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.
APA Li, Tianjun,Mavromatos, Nick E.,Nanopoulos, Dimitri V.,Xie, Dan,&Mavromatos, NE , Kings Coll London, Dept Phys, London WC2R 2LS, England.(2009).Time delays of strings in D-particle backgrounds and vacuum refractive indices.PHYSICS LETTERS B,679(4),407-413.
MLA Li, Tianjun,et al."Time delays of strings in D-particle backgrounds and vacuum refractive indices".PHYSICS LETTERS B 679.4(2009):407-413.
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