Is a classical description of stable non-BPS D-branes possible?

被引:32
作者
Bertolini, M
Di Vecchia, P
Frau, M
Lerda, A
Marotta, R
Russo, R
机构
[1] Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy
[2] Univ Turin, Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy
[3] NORDITA, DK-2100 Copenhagen, Denmark
[4] Univ Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, I-15100 Alessandria, Italy
[5] Univ Neuchatel, Inst Phys, CH-2000 Neuchatel, Switzerland
关键词
string theory; D-branes; boundary states;
D O I
10.1016/S0550-3213(00)00558-7
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We study the classical geometry produced by a stack of stable (i.e., tachyon-free) non-BPS D-branes present in K3 compactifications of type IT string theory. This classical representation is derived by solving the equations of motion describing the low-energy dynamics of the supergravity fields which couple to the non-BPS state. Differently from what expected, this configuration displays a singular behaviour: the space-time geometry has a repulson-like singularity This fact suggests that the simplest setting, namely a set of coinciding non-interacting D-branes, is not acceptable. We finally discuss the possible existence of other acceptable configurations corresponding to more complicated bound states of these non-BPS branes. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:471 / 503
页数:33
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