literature

Constraints on electron quark contact interactions and implications to models of leptoquarks and extra ZZ bosons

Jun, 2001
10 pages
Published in:
  • Phys.Lett.B 517 (2001) 167-176
e-Print:
Report number:
  • NSC-NCTS-010622

Citations per year

2001200720132019202402468
Abstract: (arXiv)
We update the global constraint on four-fermion eeqqee q q contact interactions. In this update, we included the published data of H1 and ZEUS for the 94--96 run in the e+pe^+ p mode and the newly published data of H1 for the 1999 run in the epe^- p mode. Other major changes are the new LEPII data on hadronic cross sections above 189 GeV, and the atomic parity violation measurement on Cesium because of a new and improved atomic calculation, which drives the data within 1σ1\sigma of the standard model value. The global data do not show any evidence for contact interactions, and we obtain 95% C.L. limits on the compositeness scale. A limit of ΛLL+()eu>23(12.5)\Lambda^{eu}_{LL+(-)} > 23 (12.5) TeV is obtained. Implications to models of leptoquarks and extra Z bosons are examined.
  • electron p: deep inelastic scattering
  • positron p: deep inelastic scattering
  • electron quark: four-fermion interaction
  • electron positron: annihilation
  • hadron: electroproduction
  • parity: violation
  • atomic physics
  • anti-p p: inclusive reaction
  • Drell-Yan process
  • lepton: pair production