The Measurement of M(W) from the W+W- Threshold Cross Section at LEP2

Abstract

The rapid increase of the e+e- --> W+W- cross section in the threshold region provides a method for measuring M(W) at LEP2. The dependence of the theoretical cross section -- including the effects of the finite W width, Coulomb interactions and initial state radiation -- on the collider energy and on the mass and width of the W is investigated in order to deduce the optimal collider energy which maximizes the sensitivity to M(W). Statistical and systematic uncertainties are studied in detail. The background contribution from QCD four-jet production is estimated. It is shown that by running LEP2 at a collision energy of approximately 161 GeV and obtaining a luminosity of order 100 inverse picobarns per experiment, an uncertainty on the measured value of M(W) of +-70 MeV should be achievable.

23 pages, LATEX, 10 figures available as .uu file

References in corpus (8)

• EXCALIBUR -- a Monte Carlo program to evaluate all four fermion processes at LEP 200 and beyond
• All electroweak four fermion processes in electron-positron collisions
• On Colour Rearrangement in Hadronic W${}^{+}$W${}^{-}$ Events
• Unstable particles in One Loop Calculations
• Does the W Mass Reconstruction Survive QCD Effects?
• Initial-state QED corrections to four-fermion production in e+e- collisions at LEP200 and beyond
• COULOMB EFFECTS IN W+ W- PRODUCTION
• Oblique Corrections To The W Width

Cited by in corpus (8)

• Combined LHC/ILC analysis of a SUSY scenario with heavy sfermions
• Precision W-boson and top-quark mass determinations at a muon collider
• Precision Calculations for Future Colliders
• NLO QCD corrections to the production of off--shell WW pairs at $e^{+}{e}^{-}$ colliders
• Updated Study of a Precision Measurement of the W Mass from a Threshold Scan Using Polarized ${\mathrm{e}}^{-}$ and ${\mathrm{e}}^{+}$ at ILC
• Constraining a CP-violating WWV coupling from the W^+W^- threshold cross section at LEP2
• Bounds to strong gravity from electron-positron annihilations near threshold
• Angular Distribution of Decay Leptons from e^+e^- \to W^+W^- at Threshold