Modular Symmetries of Threshold Corrections for Abelian Orbifolds with Discrete Wilson Lines

نویسنده

  • S. Todd
چکیده

The modular symmetries of string loop threshold corrections for gauge coupling constants are studied in the presence of discrete Wilson lines for all examples of abelian orbifolds, where the point group is realised by the action of Coxeter elements or generalised Coxeter elements on the root lattices of the Lie groups.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Background Symmetries in Orbifolds with Discrete Wilson Lines

Target space symmetries are studied for orbifold compactified string theories containing Wilson line background fields. The symmetries determined are for those moduli which contribute to the string loop threshold corrections of the gauge coupling constants. The groups found are subgroups of the modular group P SL(2, Z) and depend on the choice of discrete Wilson lines and the shape of the under...

متن کامل

Duality Anomaly Cancellation, Minimal String Unification and the Effective Low-Energy Lagrangian of 4-D Strings

We present a systematic study of the constraints coming from targetspace duality and the associated duality anomaly cancellations on orbifoldlike 4-D strings. A prominent role is played by the modular weights of the massless fields. We present a general classification of all possible modular weights of massless fields in Abelian orbifolds. We show that the cancellation of modular anomalies stro...

متن کامل

Modular Symmetries in Z N Orbifold Compactified String Theories with Wilson Lines

Target space modular symmetries relevant to string loop threshold corrections are studied for Z N orbifold compactified string theories containing Wilson line background fields.

متن کامل

(Non-)Abelian discrete anomalies

We derive anomaly constraints for Abelian and non-Abelian discrete symmetries using the path integral approach. We survey anomalies of discrete symmetries in heterotic orbifolds and find a new relation between such anomalies and the socalled ‘anomalous’ U(1).

متن کامل

Breakdown of Duality in (0,2) Superstring Models

After pointing out the role of the compactification lattice for spectrum calculations in orbifold models, I discuss modular discrete symmetry groups for ZN orbifolds. I consider the Z7 orbifold as a nontrivial example of a (2,2) model and give the generators of the modular group for this case, which does not contain [SL(2,Z)]3 as had been speculated. I also discuss how to treat cases where quan...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1996