Arun kumar

University of Lucknow, Department of Physics, Undergraduate

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I am Bsc student from National post graduate college university of Lucknow
I want to aquire a knowledge in high energy physics so joined Academia and i read researcher's research paper.

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$Research paper thumbnail of Measurements of inclusiveWandZcross sections in p\overline{p} collisions at \sqrt{s} = 1\hbox{.}96\, {{\rm TeV}}$

Measurements of inclusiveWandZcross sections in p\overline{p} collisions at \sqrt{s} = 1\hbox{.}96\, {{\rm TeV}}

Journal of Physics G: Nuclear and Particle Physics, 2007

We report the first measurements of inclusive W and Z boson cross-sections times the correspondin... more We report the first measurements of inclusive W and Z boson cross-sections times the corresponding leptonic branching ratios for pp collisions at √ s = 1.96 TeV based on the decays of the W and Z bosons into electrons and muons. The data were recorded with the CDF II detector at the Fermilab Tevatron and correspond to an integrated luminosity of 72.0 ± 4.3 pb −1. We test e-µ lepton universality in W decays by measuring the ratio of the W → µν to W → eν cross sections and determine a value of 0.991 ± 0.004(stat.) ± 0.011(syst.) for the ratio of W − − ν couplings (g µ /g e). Since there is no sign of non-universality, we combine our cross-section measurements in the different lepton decay modes and obtain σ W × Br(pp → W → ν) = 2.749 ± 0.010(stat.) ± 0.053(syst.) ± 0.165(lum.) nb and σ γ * /Z × Br(pp → γ * /Z →) = 254.9 ± 3.3(stat.) ± 4.6(syst.) ± 15.2(lum.) pb for dilepton pairs in the mass range between 66 GeV/c 2 and 116 GeV/c 2. We compute the ratio R of the W → ν to Z → cross sections taking all correlations among channels into account and obtain R = 10.84 ± 0.15(stat.) ± 0.14(syst.) including a correction for the virtual photon exchange component in our measured γ * /Z → cross section. Based on the measured value of R, we extract values for the W leptonic branching ratio, Br(W → ν) = 0.1082 ± 0.0022; the total width of the W boson, (W) = 2092 ± 42 MeV; and the ratio of W and Z boson total widths, (W)/ (Z) = 0.838 ± 0.017. In addition, we use our extracted value of (W) whose value depends on various electroweak parameters and certain CKM matrix elements to constrain the V cs CKM matrix element, |V cs | = 0.976 ± 0.030.

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$Research paper thumbnail of Search for a Higgs boson in the decay channel H → ZZ(*) → q$ \overline {\text{q}} $ ℓ − ℓ + in pp collisions at $ \sqrt {s} = 7 $TeV$

Search for a Higgs boson in the decay channel H → ZZ(*) → q$ \overline {\text{q}} $ ℓ − ℓ + in pp collisions at $ \sqrt {s} = 7 $TeV

Journal of High Energy Physics, 2012

A search for the standard model Higgs boson decaying into two Z bosons with subsequent decay into... more A search for the standard model Higgs boson decaying into two Z bosons with subsequent decay into a final state containing two quark jets and two leptons, H → ZZ(*) → q $ \overline {\text{q}} $ ℓ − ℓ + is presented. Results are based on data corresponding to an integrated luminosity of 4.6 fb−1 of proton-proton collisions at $ \sqrt {s} = 7 $ TeV, collected with the CMS detector at the LHC. In order to discriminate between signal and background events, kinematic and topological quantities, including the angular spin correlations of the decay products, are employed. Events are further classified according to the probability of the jets to originate from quarks of light or heavy flavor or from gluons. No evidence for the Higgs boson is found, and upper limits on its production cross section are determined for a Higgs boson of mass between 130 and 600 GeV.

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Search for the Standard Model Higgs Boson Decaying to a bb[over ¯] Pair in Events with One Charged Lepton and Large Missing Transverse Energy Using the Full CDF Data Set

Physical Review Letters, 2012

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$Research paper thumbnail of Measurements of inclusiveWandZcross sections in p\overline{p} collisions at \sqrt{s} = 1\hbox{.}96\, {{\rm TeV}}$

Measurements of inclusiveWandZcross sections in p\overline{p} collisions at \sqrt{s} = 1\hbox{.}96\, {{\rm TeV}}

Journal of Physics G: Nuclear and Particle Physics, 2007

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$Research paper thumbnail of Search for a Higgs boson in the decay channel H → ZZ(*) → q$ \overline {\text{q}} $ ℓ − ℓ + in pp collisions at $ \sqrt {s} = 7 $TeV$

Search for a Higgs boson in the decay channel H → ZZ(*) → q$ \overline {\text{q}} $ ℓ − ℓ + in pp collisions at $ \sqrt {s} = 7 $TeV

Journal of High Energy Physics, 2012

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Search for the Standard Model Higgs Boson Decaying to a bb[over ¯] Pair in Events with One Charged Lepton and Large Missing Transverse Energy Using the Full CDF Data Set

Physical Review Letters, 2012

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