Z Boson
Search for heavy resonances decaying to a W or Z boson and a Higgs boson in the qq¯⁽´⁾bb¯ final state in pp collisions at √s=13 TeV with the ATLAS detector
... After the event selection there are three classes of events, 1) those with prompt photons, 2) those with photons from hadron decays or hadrons misidentified as photons, called hadronic fakes, and 3) those from electrons ...
43
Search for Higgs and Z Boson Decays to ϕγ with the ATLAS Detector.
... distribution for background such that it exhibits a threshold structure near 100 GeV, and falls then smoothly towards higher mass values. Given the nontrivial shape of this background, these processes are modeled with a ...
19
Search for Higgs boson decays to a photon and a Z boson in pp collisions at sqrt(s)=7 and 8 TeV with the ATLAS detector
... the Z boson candidate decays to muons and to 10% for events in which the Z boson candidate decays to ...Higgs boson mass in the range 120–150 GeV is taken as an additional systematic ...
20
Measurement of Z boson production in Pb Pb collisions at √sNN=2 76 TeV with the ATLAS detector
... 1995 Z boson candidates in data corresponding to 0:15 nb 1 of integrated luminosity obtained in the 2011 LHC Pb þ Pb run at p ffiffiffiffiffiffiffiffi s NN ¼ 2:76 ...The Z bosons are reconstructed via dielectron and ...
19
Measurement of the forward Z boson production cross-section in pp collisions at root s=7 TeV
... where the combination minimises the sum of the statistical and systematic uncertaintes in quadrature. The integrated cross-section in the fiducial acceptance and the differential measurement as a function of the Z ...
35
Search for Higgs boson decays to a photon and a Z boson in pp collisions at s=7 and 8 TeV with the ATLAS detector
... the Z boson candidate decays to muons and to 10% for events in which the Z boson candidate decays to ...Higgs boson mass in the range 120–150 GeV is taken as an additional systematic ...
21
Measurement of forward W and Z boson production in association with jets in proton proton collisions at s=8 TeV
... comparing the number of events selected by the two approaches as in ref. [7]. The total contribution is estimated to be approximately 0.7%. The misidentification of hadrons as muons is evaluated as in ref. [7], by ...
23
Search for Higgs and Z Boson Decays to phi gamma with the ATLAS Detector
... Higgs boson [1, 2] H to a light meson and a photon γ have been suggested to present one viable probe of the Yukawa coupling of the Higgs boson to light (u, d, s) quarks ...Higgs boson being a ...
27
Search for heavy resonances decaying to a Z boson and a photon in pp collisions at √s=13 TeV with the ATLAS detector
... one Z boson candidate. In the leptonic analysis, the Z bo- son candidate is formed from a pair of opposite-sign, same-flavour electrons or ...analysis, Z bosons are required to recoil against a ...
20
Measurements of top quark pair to Z boson cross section ratios at s=13, 8, 7 TeV with the ATLAS detector
... a Z boson decaying to a lepton pair, Z → ` + ` − where ` = e, µ, τ , and events from the leptonic decay of W bosons are generated with the Powheg -Box v2 Monte Carlo program [51–55] interfaced to the ...
54
Measurements of differential production cross sections for a Z boson in association with jets in pp collisions at √s=8 TeV
... of the measurement uncertainties this discrepancy cannot be considered significant. The behaviour seen previously for d 2 σ/(dy(Z)dy(j 1 )) translates into global shifts of the ratio distributions depending on the ...
70
Measurement of forward W and Z boson production in association with jets in proton-proton collisions at √s=8 TeV
... and Z bosons in association with jets is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of ...
23
Search for Higgs and Z Boson Decays to ϕγ with the ATLAS Detector
... distribution for background such that it exhibits a threshold structure near 100 GeV, and falls then smoothly towards higher mass values. Given the nontrivial shape of this background, these processes are modeled with a ...
20
Measurement of the electroweak production of dijets in association with a Z boson and distributions sensitive to vector boson fusion in proton proton collisions at √s= 8 TeV using the ATLAS detector
... provides Z + n-parton predictions (n = 0, 1, 2 ...the Z -boson plus zero and one parton configurations are also produced (at LO accuracy) to allow contributions from double parton scattering to be ...
57
Search for Higgs and Z Boson Decays to J/ψγ and ϒ(nS)γ with the ATLAS Detector
... E. Kladiva, 145b M. H. Klein, 35 M. Klein, 74 U. Klein, 74 K. Kleinknecht, 83 P. Klimek, 147a,147b A. Klimentov, 25 R. Klingenberg, 43 J. A. Klinger, 84 T. Klioutchnikova, 30 P. F. Klok, 106 E.-E. Kluge, 58a P. Kluit, ...
19
Measurement of the forward $Z$ boson production cross-section in $pp$ collisions at $\sqrt{s}$ = 7 TeV
... and Z boson analyses and it is expected that the size of the efficiency correction is similar for W and Z ...W boson measurement [10] to be ...W boson cross-section results are updated ...
41
Observation of top quark pairs produced in association with a vector boson in pp collisions at √s=8 TeV
... or Z boson (ttW and ttZ), which have expected cross sections of σ(ttW) = 203 +20 −22 fb and σ(ttZ) = 206 +19 −24 fb in the SM in 8 TeV collisions ...
55
Measurement of W± and Z-boson production cross sections in pp collisions at √s = 13 TeV with the ATLAS detector
... The systematic uncertainties in the predictions are dominated by the imperfect knowledge of the proton parton distribution func- tions. These uncertainties are obtained from the sum in quadrature of the differences ...
21
Measurements of top-quark pair to Z-boson cross-section ratios at √s=13, 8, 7 TeV with the ATLAS detector
... a Z boson decaying to a lepton pair, Z → ` + ` − where ` = e, µ, τ , and events from the leptonic decay of W bosons are generated with the Powheg -Box v2 Monte Carlo program [51–55] interfaced to the ...
54
Observation and measurements of the production of prompt and non-prompt $$\varvec{\text {J}\uppsi }$$ J ψ mesons in association with a $$\varvec{Z}$$ Z boson in $$\varvec{pp}$$ p p collisions at $$\varvec{\sqrt{s}= 8\,\text {TeV}}$$ s = 8 TeV with the ATLAS detector
... R. Richter 101 , E. Richter-Was 38b , M. Ridel 80 , P. Rieck 16 , J. Rieger 54 , M. Rijssenbeek 149 , A. Rimoldi 121a,121b , L. Rinaldi 20a , E. Ritsch 62 , I. Riu 12 , F. Rizatdinova 114 , E. Rizvi 76 , S. H. Robertson ...
29