Generalized Green-Schwarz mechanism in F theory
نویسندگان
چکیده
منابع مشابه
Generalized Green-Schwarz mechanism in F theory
We derive the anomaly 8-form of 6-dimensional gauge theories arising in F theory compactifications on elliptic Calabi-Yau threefolds. The result allows to determine the matter content of certain such theories in terms of intersection numbers on the base of elliptic fibration. We also discuss gauge theories on 7-branes with double point singularities on the worldvolume. Applications to Type II c...
متن کاملThe Weak Mixing Angle in String Theory and the Green-Schwarz Mechanism
Four-dimensional strings with the standard model gauge group SU(3)×SU(2)×U(1) give model-dependent predictions for the tree level weak mixing-angle. In t he presence of an extra pseudo-anomalous gaugedU(1)X , the value of the weak angle may be computed purely in terms of the charges of the massless fermions of the theory, independently of the details of the massive string sector. I present the ...
متن کاملDynamical supersymmetry breaking in models with a Green–Schwarz mechanism
Ž . We consider supersymmetry breaking in theories with gaugino condensation in the presence of an anomalous U 1 symmetry with anomaly cancellation by the Green–Schwarz mechanism. In these models, a Fayet–Iliopoulos D-term can give important contributions to the soft supersymmetry-breaking scalar masses. Most discussions of this possibility have ignored the dilaton field. We argue that this is ...
متن کاملNonplanar Anomalies in Noncommutative Theories and the Green-Schwarz Mechanism
We discuss nonplanar anomalies in noncommutative gauge theories. In particular we show that a nonplanar anomaly exists when the external noncommutative momentum is zero and that it leads to a non-conservation of the associated axial charge. In the case of nonplanar local anomalies, a cancellation of the anomaly can be achieved by a Green-Schwarz mechanism. In an example of D3 branes placed on a...
متن کاملProbing the Green-Schwarz Mechanism at the Large Hadron Collider
We investigate the phenomenology of new abelian gauge bosons, which we denote as X bosons, that suffer a mixed anomaly with the Standard Model, but are made selfconsistent by the Green-Schwarz mechanism. A distinguishing aspect of the resulting effective theory is the decay of X bosons into Standard Model gauge bosons, X → ZZ,WW, γZ. We compute the production cross-section of the X boson from v...
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: Physics Letters B
سال: 1996
ISSN: 0370-2693
DOI: 10.1016/0370-2693(96)01134-3