Global Study of Electron-Quark Contact Interactions

Details Global Study of Electron-Quark Contact Interactions Global Study of Electron-Quark Contact Interactions

1997-07-21

arxiv.org/abs/hep-ph/9707412v2

Phys.Rev.D57:391-404,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages (now single-spaced), Revtex, 2 eps figures, uses epsf.sty. Some clarifications, minor corrections, 2 new references,

Scientific paper

10.1103/PhysRevD.57.391

We perform a global fit of data relevant to $eeqq$ contact interactions, including deep inelastic scattering at high $Q^2$ from ZEUS and H1, atomic physics parity violation in Cesium from JILA, polarized $e^-$ on nuclei scattering experiments at SLAC, Mainz and Bates, Drell-Yan production at the Tevatron, the total hadronic cross section $\sigma_{had}$ at LEP, and neutrino-nucleon scattering from CCFR. With only the new HERA data, the presence of contact interactions improves the fit compared to the Standard Model. When other data sets are included, the size of the contact contributions is reduced and the overall fit represents no real improvement over the Standard Model.

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