Evidence for WW/WZ vector boson scattering in the decay channel ℓνqq produced in association with two jets in proton-proton collisions at <math altimg="si1.svg"><msqrt><mrow><mi>s</mi></mrow></msqrt><mo linebreak="goodbreak" linebreakstyle="after">=</mo><mn>13</mn></math> TeV - INSPIRE

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Evidence for WW/WZ vector boson scattering in the decay channel ℓνqq produced in association with two jets in proton-proton collisions at $\sqrt{s} = 13$ TeV

CMS

Collaboration

Dec 9, 2021

40 pages

Published in:

Phys.Lett.B 834 (2022) 137438

Published: Sep 9, 2022
and
Published: Nov 10, 2022

e-Print:

2112.05259 [hep-ex]

DOI:

10.1016/j.physletb.2022.137438 (publication)

Report number:

CMS-SMP-20-013,
CERN-EP-2021-225

Experiments:

CERN-LHC-CMS

View in:

reference search28 citations

Citations per year

Abstract: (Elsevier B.V.)

Evidence is reported for electroweak (EW) vector boson scattering in the decay channel

ℓ ν q q

of two weak vector bosons

W V

(

V = W

or Z), produced in association with two parton jets. The search uses a data set of proton-proton collisions at 13 TeV collected with the CMS detector during 2016–2018 with an integrated luminosity of 138

{fb}^{- 1}

. Events are selected requiring one lepton (electron or muon), moderate missing transverse momentum, two jets with a large pseudorapidity separation and a large dijet invariant mass, and a signature consistent with the hadronic decay of a

W / Z

boson. The cross section is computed in a fiducial phase space defined at parton level requiring all parton transverse momenta

p_{T} > 10 GeV

and at least one pair of outgoing partons with invariant mass

m_{q q} > 100 GeV

. The measured and expected EW

W V

production cross sections are

{1.90}_{- 0.46}^{+ 0.53}

pb and

{2.23}_{- 0.11}^{+ 0.08} (scale) \pm 0.05 (PDF)

pb, respectively, where PDF is the parton distribution function. The observed EW signal strength is

μ_{EW} = 0.85 \pm 0.12 {(stat)}_{- 0.17}^{+ 0.19} (syst)

, corresponding to a signal significance of 4.4 standard deviations with 5.1 expected, and it is measured keeping the quantum chromodynamics (QCD) associated diboson production fixed to the standard model prediction. This is the first evidence of vector boson scattering in the

ℓ ν q q

decay channel at LHC. The simultaneous measurement of the EW and QCD associated diboson production agrees with the standard model prediction.

Note:

Replaced with the published version. Added the journal reference. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-20-013 (CMS Public Pages)

CMS
Vector boson scattering
p p: colliding beams
vector boson: pair production
dijet: associated production
W: pair production
Z0: associated production
vector boson: scattering
parton: distribution function
p p: scattering

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