Revealing the large extra dimension effective interaction at ane+e−collider with polarized beams
| Autor: | A. V. Tsytrinov, A. A. Pankov, N. Paver |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Physical Review D. 75 |
| ISSN: | 1550-2368 1550-7998 |
| DOI: | 10.1103/physrevd.75.095004 |
| Popis: | Several types of new physics scenarios are represented by contactlike effective interactions. An example is the exchange of nonstandard quanta of very large mass scales, beyond the kinematical limit for direct production set by the available collider energy. This kind of interactions can be revealed only 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. Here, we assess the expected ``identification 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\char21{}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, with arbitrary coupling constants. In this sense, the estimated identification reach on the ADD model can be considered as ``model independent.'' In the analysis, we give estimates also for the expected ``discovery reaches'' on the various scenarios. We emphasize the substantial role of beams polarization in enhancing the sensitivity to the contactlike interactions under consideration. |
| Databáze: | OpenAIRE |
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