Measurement of forward $W → eν$ production in $pp$ collisions at $$\sqrt{s}=8$$ TeV
A measurement of the cross-section for $W → eν$ production in $pp$ collisions is presented using data corresponding to an integrated luminosity of 2fb-1 collected by the LHCb experiment at a centre-of-mass energy of $$\sqrt{s}=8$$ TeV. The electrons are required to have more than 20 GeV of transverse momentum and to lie between 2.00 and 4.25 in pseudorapidity. The inclusive $$W$$ production cross-sections, where the $$W$$ decays to $eν$, are measured to be where the first uncertainties are statistical, the second are systematic, the third are due to the knowledge of the LHC beam energy and the fourth are due to the luminosity determination. Differential cross-sections as a function of the electron pseudorapidity are measured. The $W^+/W^-$ cross-section ratio and production charge asymmetry are also reported. Results are compared with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics. Finally, in a precise test of lepton universality, the ratio of $$W$$ boson branching fractions is determined to be where the first uncertainty is statistical and the second is systematic.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Contributing Organization:
- The LHCb collaboration
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1525174
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2016, Issue 10; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Review of lepton universality tests in B decays
|
journal | December 2018 |
Precision measurement and interpretation of inclusive $$W^+$$ W + , $$W^-$$ W - and $$Z/\gamma ^*$$ Z / γ ∗ production cross sections with the ATLAS detector
|
journal | June 2017 |
Review of Lepton Universality tests in B decays | text | January 2018 |
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