| Resumen |
We present a measurement of the effective weak mixing angle parameter sin2θl
eff in pp¯ → Z=γ → μþμ−
events at a center-of-mass energy of 1.96 TeV, collected by the D0 detector at the Fermilab Tevatron
Collider and corresponding to 8.6 fb−1 of integrated luminosity. The measured value of sin2θl
eff½μμ ¼
0.23016 0.00064 is further combined with the result from the D0 measurement in pp¯ → Z=γ → eþe−
events, resulting in sin2 θl
eff½comb ¼ 0.23095 0.00040. This combined result is the most precise
measurement from a single experiment at a hadron collider and is the most precise determination using
the coupling of the Z=γ to light quarks |
