Search for TeV Strings and New Phenomena in Bhabha Scattering at LEP2

Details Search for TeV Strings and New Phenomena in Bhabha Scattering at LEP2 Search for TeV Strings and New Phenomena in Bhabha Scattering at LEP2

2000-02-16

arxiv.org/abs/hep-ph/0002172v1

Phys.Rev.D62:076005,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 table, 3 figures

Scientific paper

10.1103/PhysRevD.62.076005

A combined analysis of the data on Bhabha scattering at centre-of-mass energies 183 and 189 GeV from the LEP experiments ALEPH, L3 and OPAL is performed to search for effects of TeV strings in quantum gravity models with large extra dimensions. No statistically significant deviations from the Standard Model expectations are observed and lower limit on the string scale M_S = 0.631 TeV at 95 % confidence level is derived. The data are used to set lower limits on the scale of contact interactions ranging from 4.2 to 16.2 TeV depending on the model. In a complementary analysis we derive an upper limit on the electron size of 2.8 x 10^{-19} m at 95 % confidence level.

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