Search results for "ASYMMETRY"
showing 10 items of 1109 documents
Electroweak baryogenesis from a dark sector
2017
Adding an extra singlet scalar $S$ to the Higgs sector can provide a barrier at tree level between a false vacuum with restored electroweak symmetry and the true one. This has been demonstrated to readily give a strong phase transition as required for electroweak baryogenesis. We show that with the addition of a fermionic dark matter particle $\chi$ coupling to $S$, a simple UV-complete model can realize successful electroweak baryogenesis. The dark matter gets a CP asymmetry that is transferred to the standard model through a $CP\ portal\ interaction$, which we take to be a coupling of $\chi$ to $\tau$ leptons and an inert Higgs doublet. The CP asymmetry induced in left-handed $\tau$ lepto…
"Table 9" of "Cross-sections and leptonic forward-backward asymmetries from the Z0 running of LEP."
2000
Cross section and forward-backward asymmetry in the MU+ MU- channel for the1995 data. The polar angle is 20 to 160 degrees. Additional systematic error for cross section of 0.28 PCT (efficiencies and backgrounds) and 0.14 PCT (absolute luminosity). Additional systematic error for the asymmetry of 0.0011.
"Table 1" of "Measurement of charge asymmetry in hadronic Z decays"
1991
No description provided.
"Table 14" of "Measurements of the line shape of the Z0 and determination of electroweak parameters from its hadronic and leptonic decays"
1994
MU+ MU- forward-backward asymmetries from the 1990 data set, derived by counting the number of muons in the forward-backward hemispheres, corrected to full solid angle but not for cuts on momenta and accollinearity. Additional systematic error 0.005.
"Table 16" of "Measurements of the line shape of the Z0 and determination of electroweak parameters from its hadronic and leptonic decays"
1994
MU+ MU- forward-backward asymmetries from the 1990 data set, derived from a maximum likelihood fit to the angular distributions, corrected to full solid angle but not for cuts on momenta and accollinearity. Additional systematic error 0.005.
"Table 5" of "Measurement of electroweak parameters from Z decays into Fermion pairs"
1990
No description provided.
"Table 7" of "Cross-sections and leptonic forward-backward asymmetries from the Z0 running of LEP."
2000
Cross section and forward-backward asymmetry in the MU+ MU- channel for the1993 data. The polar angle is 20 to 160 degrees. Additional systematic error for cross section of 0.28 PCT (efficiencies and backgrounds) and 0.29 PCT (absolute luminosity). Additional systematic error for the asymmetry of 0.0009.
"Table 8" of "Cross-sections and leptonic forward-backward asymmetries from the Z0 running of LEP."
2000
Cross section and forward-backward asymmetry in the MU+ MU- channel for the1994 data. The polar angle is 20 to 160 degrees. Additional systematic error for cross section of 0.26 PCT (efficiencies and backgrounds) and 0.14 PCT (absolute luminosity). Additional systematic error for the asymmetry of 0.0005.
"Table 24" of "Measurements of the line shape of the Z0 and determination of electroweak parameters from its hadronic and leptonic decays"
1994
LEPTON+ LEPTON- forward-backward asymmetries from the 1990 data set. Data are corrected for t-channel subtraction, and to full solid angle but not for momenta and accollinearity cuts. Additional systematic uncertainty, excluding luminosity, is 0.005.
"Table 7" of "Measurement of electroweak parameters from Z decays into Fermion pairs"
1990
No description provided.