Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-12-09
Phys.Rev.D75:095004,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 2 figures
Scientific paper
10.1103/PhysRevD.75.095004
Contactlike nonstandard effective interactions can be revealed through deviations of observables from the Standard Model predictions. If such deviations were observed, the relevant source should be identified among the possible models that could explain them. We estimate the expected discrimination reach on the ADD model of gravity in large compactified extra dimensions, against the compositeness-inspired four-fermion contact interaction. As basic observables we take the differential cross sections for fermion-pair production at a 0.5-1 TeV electron-positron linear collider with both beams longitudinally polarized. For the four-fermion contact interaction, we assume a general linear combination of the individual models with definite chiralities, and arbitrary coupling constants. Accordingly, the estimated identification reach on the ADD scenario can be considered as `model-independent'. We emphasize the substantial role of beams polarization in enhancing the identification sensitivity.
Pankov A. A.
Paver Nello
Tsytrinov A. V.
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