Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-04-27
Phys.Rev.Lett.98:041601,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 figures, LaTeX2e (revtex4); argument completely revisited, stronger and more pertinent bounds given
Scientific paper
10.1103/PhysRevLett.98.041601
We show that the coefficients of operators in the electroweak chiral Lagrangian can be bounded if the underlying theory obeys the usual assumptions of Lorentz invariance, analyticity, unitarity and crossing to arbitrarily short distances. Violations of these bounds can be explained by either the existence of new physics below the naive cut-off of the the effective theory, or by the breakdown of one of these assumptions in the short distance theory. As a corollary, if no light resonances are found, then a measured violation of the bound would falsify generic models of string theory.
Distler Jacques
Grinstein Benjamin
Porto Rafael A.
Rothstein Ira Z.
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