Work

Probing strongly interacting electroweak dynamics through W+ W− /ZZratios at future e+ e− colliders

Year: 1995

Type: article

Abstract: We point out that the ratio of ${\mathit{W}}^{+}$${\mathit{W}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}${\mathit{W}}^{+}$${\mathit{W}}^{\mathrm{\ensuremath{-}}}$ and ${\mathit{W}}^{+}$${\mathit{W}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}ZZ cross sections is a sensitive probe of the dynamics of electroweak symmetry breaking, in the c.m. energy region \ensuremath{\surd}${\mathit{s}}_{\mathit{W}\mathit{W}}$ \ensuremath{\gtrsim}1 TeV where vector boson scattering may well become strong. We suggest ways in which this ratio can be extracted at a 1.5 TeV ${\mathit{e}}^{+}$${\mathit{e}}^{\mathrm{\ensuremath{-}}}$ linear collider, using ${\mathit{W}}^{\ifmmode\pm\else\textpm\fi{}}$,Z\ensuremath{\rightarrow}jj hadronic decays and relying on dijet mass resolution to provid statistical discrimination between ${\mathit{W}}^{\ifmmode\pm\else\textpm\fi{}}$ and Z. WW fusion processes studied here are unique for exploring scalar resonances of mass of about 1 TeV and are complementary to studies via the direct channel ${\mathit{e}}^{+}$${\mathit{e}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}${\mathit{W}}^{+}$${\mathit{W}}^{\mathrm{\ensuremath{-}}}$ for the vector and nonresonant cases. With an integrated luminosity of 200 ${\mathrm{fb}}^{\mathrm{\ensuremath{-}}1}$, the signals obtained are statistically significant. A comparision with a study of the ${\mathit{e}}^{\mathrm{\ensuremath{-}}}$${\mathit{e}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}\ensuremath{\nu}\ensuremath{\nu}${\mathit{W}}^{\mathrm{\ensuremath{-}}}$${\mathit{W}}^{\mathrm{\ensuremath{-}}}$ process is made. Enhancements of the signal rate from using a polarized electron beam, or at a 2 TeV ${\mathit{e}}^{+}$${\mathit{e}}^{\mathrm{\ensuremath{-}}}$ linear colider and possible higher energy ${\mathrm{\ensuremath{\mu}}}^{+}$${\mathrm{\ensuremath{\mu}}}^{\mathrm{\ensuremath{-}}}$ colliders, are also presented.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.52.3815

Authors: V. Barger, Kingman Cheung, T. Han, R. J. N. Phillips

Institutions: Rutherford Appleton Laboratory, University of Wisconsin–Madison, University of California, Davis, The University of Texas at Austin

Language: Latvian

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: U.S. Department of Energy

Awards: HIGH ENERGY PHYSICS RESEARCH: EXPERIMENTAL, THEORETICAL, PHENOMENOLOGY, MATHEMATICAL, G222768804, HIGH ENERGY PHYSICS RESEARCH EXPERIMENTAL, THEORETICAL, PHENOMENOLOGY, MATHEMATICAL, RESEARCH ON QUANTUM GRAVITY, NEW AWARD - RESEARCH PROGRAM IN PARTICLE PHYSICS PIS - DUANE A. DICUS, E.C.G. SUDARSHAN,JACK L. RITCHE, KAROL LANG