Measurement of the effective weak mixing angle in pp¯→Z/γ.sup.∗./sup.→ℓ.sup.+./sup.ℓ.sup.−./sup. events

0501236 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš - Royon, C. … celkem 374 autorů
Measurement of the effective weak mixing angle in pp¯→Z/γ^∗→ℓ⁺ℓ⁻ events.
Physical Review Letters. Roč. 120, č. 24 (2018), s. 1-8, č. článku 241802. ISSN 0031-9007. E-ISSN 1079-7114
Grant CEP: GA MŠMT LM2015068
Institucionální podpora: RVO:68378271
Klíčová slova: Batavia TEVATRON Coll * DZERO * experimental results * anti-p p --> muon+ muon- anything * 1960 GeV-cms
Obor OECD: Particles and field physics
Impakt faktor: 9.227, rok: 2018

We present a measurement of the effective weak mixing angle parameter sin2θeffℓ in pp¯→Z/γ*→μ+μ- 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 sin2θeffℓ[μμ]=0.23016±0.00064 is further combined with the result from the D0 measurement in pp¯→Z/γ*→e+e- events, resulting in sin2θeffℓ[comb]=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.

Trvalý link: http://hdl.handle.net/11104/0293230