Open AccessD-brane spectrum and K-theory constraints ofD= 4, Script N = 1 orientifolds
Author(s) -
John Maiden,
Gary Shiu,
Bogdan Stefański
Publication year - 2006
Publication title -
journal of high energy physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.998
H-Index - 261
eISSN - 1126-6708
pISSN - 1029-8479
DOI - 10.1088/1126-6708/2006/04/052
Subject(s) - orientifold , worldsheet , physics , orbifold , torsion (gastropod) , theoretical physics , conformal map , spectrum (functional analysis) , string theory , superpotential , conformal field theory , particle physics , string phenomenology , pure mathematics , string (physics) , string field theory , central charge , mathematical physics
We study the spectrum of stable BPS and non-BPS D-branes in Z_2 x Z_2orientifolds for all choices of discrete torsion between the orbifold andorientifold generators. We compute the torsion K-theory charges in these D=4,N=1 orientifold models directly from worldsheet conformal field theory, andcompare with the K-theory constraints obtained indirectly using D-brane probes.The K-theory torsion charges derived here provide non-trivial constraints onstring model building. We also discuss regions of stability for non-BPSD-branes in these examples.Comment: 40 pages, 5 table
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom