Exponentially small couplings and the hierarchy problem
نویسندگان
چکیده
منابع مشابه
Exponentially Small Couplings and the Hierarchy Problem
We propose a stringy mechanism whereby a large hierarchy between symmetry breaking scales is generated. This mechanism is based upon the existence of a fifth dimension compactified on a segment. We focus on a simple supersymmetric model with one massless Higgs field in the 3 of SU(3) and another one in the 3̄ on each four dimensional end point of the fifth dimension. Along supersymmetric flat di...
متن کاملSolving the Hierarchy Problem with Exponentially Large Dimensions
In theories with (sets of) two large extra dimensions and supersymmetry in the bulk, the presence of non-supersymmetric brane defects naturally induces a logarithmic potential for the volume of the transverse dimensions. Since the logarithm of the volume rather than the volume itself is the natural variable, parameters of O(10) in the potential can generate an exponentially large size for the e...
متن کاملExponentially Small Couplings between Twisted Fields of Orbifold String Theories
We investigate the natural occurrence of exponentially small couplings in effective field theories deduced from higher dimensional models. We calculate the coupling between twisted fields of the Z3 Abelian orbifold compactification of the heterotic string. Due to the propagation of massive Kaluza-Klein modes between the fixed points of the orbifold, the massless twisted fields located at these ...
متن کاملExponentially Small Splitting for the Pendulum: A Classical Problem Revisited
Abstract. In this paper, we study the classical problem of the exponentially small splitting of separatrices of the rapidly forced pendulum. Firstly, we give an asymptotic formula for the distance between the perturbed invariant manifolds in the so-called singular case and we compare it with the prediction of Melnikov Theory. Secondly, we give exponentially small upper bounds in some cases in w...
متن کاملExponentially Small Bounds on the Expected Optimum
In this paper we are interested in behavior of this problem when the xi are i.i.d. random variables. Under fairly general conditions, the median of the solution for the subset sum problem has been shown to be exponentially small when t is near E [∑n i=1 xi ] [Luek82]; this result has found application in the probabilistic analysis of approximation algorithms for the 0-1 Knapsack problem [Luek82...
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: 1997
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(97)01119-2