Measurement of the Tt, WW and Z -- [tau Tau] Production Cross Sections in Pp Collisions at [square Root of S]

Measurement of the Tt, WW and Z -- [tau Tau] Production Cross Sections in Pp Collisions at [square Root of S] PDF Author: Sebastian Carron Montero
Publisher:
ISBN:
Category : Cross sections (Nuclear physics)
Languages : en
Pages : 366

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Measurement of the Tt, WW and Z -- [tau Tau] Production Cross Sections in Pp Collisions at [square Root of S]

Measurement of the Tt, WW and Z -- [tau Tau] Production Cross Sections in Pp Collisions at [square Root of S] PDF Author: Sebastian Carron Montero
Publisher:
ISBN:
Category : Cross sections (Nuclear physics)
Languages : en
Pages : 366

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Measurement of the Tt, WW and Z -] Tautau Production Cross Sections in P Anti-p Collisions at S**(1/2)

Measurement of the Tt, WW and Z -] Tautau Production Cross Sections in P Anti-p Collisions at S**(1/2) PDF Author: Sebastian Carron Montero
Publisher:
ISBN:
Category :
Languages : en
Pages : 204

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In this thesis we present a new technique to analyze events containing two highly energetic leptons, as a probe of the Standard Model. The philosophy is to consider the data in a more global way, as opposed to the more traditional process dependent approach of extracting a given signal over the expected backgrounds by using various kinematical requirements. We use our global technique to simultaneously measure the cross sections of the main Standard Model processes; the t{bar t}, WW and Z → [tau][tau] production from p{bar p} collisions at √s = 1.96 TeV in the CDF detector at Fermilab. We select events by requiring they contain two highly energetic leptons (e[mu], ee, or [mu][mu]), and make no other kinematic requirements, except for the ee and [mu][mu] channels. We then use a likelihood fit of the data in the two-dimensional phase space defined by the missing transverse energy (E{sub T}) and the number of jets in the event (N{sub jet}), to the expected Standard Model distributions, to simultaneously extract the production cross-sections of the main process contributing to our dilepton sample.

Measurement of the $t\bar{t}$ Production Cross Section in Pp Collisions at $\sqrt{s}$

Measurement of the $t\bar{t}$ Production Cross Section in Pp Collisions at $\sqrt{s}$ PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 21

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The top-quark pair production cross section is measured in final states with one electron or muon and one hadronically decaying [tau] lepton from the process $t\bar{t}$ to (l[nu]l) ([tau][nu][tau]) $b\bar{b}$, where l = e, [mu]. The data sample corresponds to an integrated luminosity of 19.6 fb-1 collected with the CMS detector in proton-proton collisions at $\sqrt{s}$ =8 TeV. The measured cross section [sigma]$t\bar{t}$ = 257 ± 3 (stat) ± 24 (syst) ± 7 (lumi) pb, assuming a top-quark mass of 172.5 GeV, is consistent with the standard model prediction.

Measurement of W and Z Boson Production Cross Sections in Proton-proton Collisions at [square Root] S

Measurement of W and Z Boson Production Cross Sections in Proton-proton Collisions at [square Root] S PDF Author: Stephanie Akemi Brandt
Publisher:
ISBN:
Category :
Languages : en
Pages : 160

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Measurements of W and Z boson production cross sections in pp collisions at [square root] s = 5.02TeV and [square root] s = 13TeV are presented. Data was collected by the CMS experiment at the LHC during low-pileup data taking periods in 2017. The corresponding integrated luminosity for the data is 299.1 ± 5 pb−1 ( [square root] s = 5.02TeV) and 199.3 ± 4 pb−1 ( [square root] s = 13TeV), with an average number of pile-up interactions [[mu] = 3 ([mu] = 2). Cross sections and cross section ratios are reported, with final states in electron and muon channels.

Measurement of the W and Z Boson Production Cross Sections in P, P̄ Collisions at [square Root Sign]s

Measurement of the W and Z Boson Production Cross Sections in P, P̄ Collisions at [square Root Sign]s PDF Author: Peter Matthew Grudberg
Publisher:
ISBN:
Category :
Languages : en
Pages : 400

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Measurement of the Inclusive W and Z Production Cross Sections in Pp Collisions at $ \sqrt {s}

Measurement of the Inclusive W and Z Production Cross Sections in Pp Collisions at $ \sqrt {s} PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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A measurement of inclusive W and Z production cross sections in pp collisions at sqrt(s)=7 TeV is presented. The electron and muon decay channels are analyzed in a data sample collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 36 inverse picobarns. The measured inclusive cross sections are sigma(pp-> WX) B(W-> l nu) = 10.30 +/- 0.02 (stat.) +/- 0.10 (syst.) +/- 0.10 (th.) +/- 0.41 (lumi.) nb and sigma(pp -> ZX) B(Z-> l+̂l-̂) = 0.974 +/- 0.007 (stat.) +/- 0.007 (syst.) +/- 0.018 (th.) +/- 0.039 (lumi.) nb, limited to the dilepton invariant mass range 60 to 120 GeV. The luminosity-independent cross section ratios are [sigma(pp->WX) B(W-> l nu)]/[sigma(pp-> ZX) B(Z->l+̂l-̂)] = 10.54 +/- 0.07 (stat.) +/- 0.08 (syst.) +/- 0.16 (th.) and [sigma(pp->W+̂X) B(W+̂ -> l+̂nu)] / [sigma(pp->W-̂ X) B(W-̂ -> l-̂ nu)] = 1.421 +/- 0.006 (stat.) +/- 0.014 (syst.) +/- 0.029 (th.). The measured values agree with next-to-next-to-leading order QCD cross section calculations based on recent parton distribution functions.

Measurements of the Tt{u02C9} Production Cross Section at [square Root Symbol]s

Measurements of the Tt{u02C9} Production Cross Section at [square Root Symbol]s PDF Author: Joseph Francis Kozminski
Publisher:
ISBN:
Category : Cross sections (Nuclear physics)
Languages : en
Pages : 444

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Measurement of the Tt̄ Production Cross Section in Pp̄ Collisions at [square Root] S

Measurement of the Tt̄ Production Cross Section in Pp̄ Collisions at [square Root] S PDF Author: Heather L. Ray
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ISBN:
Category :
Languages : en
Pages : 354

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Measurement of the Tt− Production Cross Section at [square Root]s

Measurement of the Tt− Production Cross Section at [square Root]s PDF Author: DooKee Cho
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ISBN:
Category :
Languages : en
Pages : 198

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Measurement of the Ttbar Production Cross Section in Ppbar Collisions at [squareroot]s

Measurement of the Ttbar Production Cross Section in Ppbar Collisions at [squareroot]s PDF Author: Salvatore Rocco Rappoccio
Publisher:
ISBN:
Category : Particles (Nuclear physics)
Languages : en
Pages : 688

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