Strings on eight-orbifolds
نویسندگان
چکیده
منابع مشابه
Strings on Orbifolds*
The most thoroughly understood example of superstring compactification is compactification on a fiat torus [1]. This example is exactly soluble and obeys all of the equations of string theory. It is also clearly a significant example since it is one way to understand the construction of the heterotic string theory [2]. For compact~ficatlon of physical dimensions from ten to four, the fiat torus...
متن کاملN = 2 Strings on Orbifolds
We study closed N = 2 strings on orbifolds of the form T /Z2 and C /Z2. We compute the torus partition function and prove its modular invariance. We analyse the BRST cohomology of the theory, construct the vertex operators, and compute three and four point amplitudes of twisted and untwisted states. We introduce a background of D-branes, and compute twist states correlators.
متن کاملTachyon-Free Non-Supersymmetric Strings on Orbifolds
We discuss tachyon-free examples of (Type IIB on) non-compact nonsupersymmetric orbifolds with tachyons projected out by non-trivial discrete torsion. We also consider D3-branes in these backgrounds. The resulting non-supersymmetric gauge theories (including a chiral example) have supersymmetric spectra, but non-supersymmetric interactions. In the large N limit these theories are conformal to a...
متن کامل(t) Twisted Strings and Orbifolds’
How can these symmetries be broken to SU(3) x SU(2) x U(1) in four dimensions? One powerful approach to string symmetry breaking was proposed in a beautiful paper by Candelas, Horowitz, Strominger and Witten [l]. This group advocated compactifying the heterotic string on M4 x K, where M4 is four-dimensional Minkowski space, and K is a compact six-dimensional manifdld of SU(31 holonomv. a so-cal...
متن کاملStrings in Time-Dependent Orbifolds
We continue and extend our earlier investigation " Strings in a Time-Dependent Orbifold " (hep-th/0204168). We formulate conditions for an orbifold to be amenable to perturba-tive string analysis and classify the low dimensional orbifolds satisfying these conditions. We analyze the tree and torus amplitudes of some of these orbifolds. The tree amplitudes exhibit a new kind of infrared divergenc...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2004
ISSN: 0550-3213
DOI: 10.1016/j.nuclphysb.2004.10.026