Study of $W$ boson production in association with beauty and charm

Abstract

The associated production of a $W$ boson with a jet originating from either a light parton or heavy-flavor quark is studied in the forward region using proton-proton collisions. The analysis uses data corresponding to integrated luminosities of 1.0 and $2.0{\mathrm{fb}}^{-1}$ collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, respectively. The $W$ bosons are reconstructed using the $W\to \mu \nu$ decay and muons with a transverse momentum, $p_{\mathrm{T}}$, larger than 20 GeV in the pseudorapidity range $2.0<\eta <4.5$. The partons are reconstructed as jets with $p_{\mathrm{T}}>20$ GeV and $2.2<\eta <4.2$. The sum of the muon and jet momenta must satisfy $p_{\mathrm{T}}>20$ GeV. The fraction of $W+$jet events that originate from beauty and charm quarks is measured, along with the charge asymmetries of the $W+b$ and $W+c$ production cross-sections. The ratio of the $W+$jet to $Z+$jet production cross-sections is also measured using the $Z\to \mu \mu$ decay. All results are in agreement with Standard Model predictions.

References in corpus (14)

• PYTHIA 6.4 Physics and Manual
• New parton distributions for collider physics
• Performance of the LHCb Vertex Locator
• Measurement of the forward $Z$ boson production cross-section in $pp$ collisions at $\sqrt{s}$ = 7 TeV
• Measurements of the W production cross sections in association with jets with the ATLAS detector
• Measurement of the cross-section for Z->e+e- production in pp collisions at sqrt{s}=7TeV
• Differential cross section measurements for the production of a W boson in association with jets in proton-proton collisions at sqrt(s) = 7 TeV
• Identification of beauty and charm quark jets at LHCb
• Measurement of forward $\mathrm{Z}\to {\mathrm{e}}^{+}{\mathrm{e}}^{-}$ production at $\sqrt{s}=8$TeV
• First observation of top quark production in the forward region
• Measurement of the ratio of the $p\bar{p}\to W$+$c$-jet cross section to the inclusive $p\bar{p}\to W$+jets cross section
• A measurement of the ratio of the production cross sections for W and Z bosons in association with jets with the ATLAS detector
• Observation of the Production of a W Boson in Association with a Single Charm Quark
• Measurement of the Z+b-jet cross-section in pp collisions at $\sqrt{s}=7\mathrm{Te}\mathrm{V}$ in the forward region

Cited by in corpus (31)

• The Structure of the Proton in the LHC Precision Era
• The PDF4LHC report on PDFs and LHC data: Results from Run I and preparation for Run II
• Identification of beauty and charm quark jets at LHCb
• First observation of top quark production in the forward region
• Measurement of associated production of a W boson and a charm quark in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• A direct probe of the intrinsic charm content of the proton
• Disentangling Heavy Flavor at Colliders
• Measurements of the W boson rapidity, helicity, double-differential cross sections, and charge asymmetry in pp collisions at $\sqrt{s}=$ 13 TeV
• Search for heavy neutral leptons in $W^{+}\to {\mu }^{+}{\mu }^{\pm }\text{jet}$ decays
• Study of $Z$ bosons produced in association with charm in the forward region
• Measurement of forward $W$ and $Z$ boson production in association with jets in proton-proton collisions at $\sqrt{s}=8$ TeV
• Measurement of forward $t\overline{t}$, $W+b\overline{b}$ and $W+c\overline{c}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV
• W+charm production with massive c quarks in PowHel
• Production of electroweak bosons at hadron colliders: theoretical aspects
• Vector Bosons and Jets in Proton Collisions
• Measurement of the production cross section for a W boson in association with a charm quark in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• NLO + parton-shower generator for Wc production in the POWHEG BOX RES
• Measuring c-quark polarization in W+c samples at ATLAS and CMS
• Identification of charm jets at LHCb
• First observation of forward $Z\to b\bar{b}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV
• Probing the diffractive production of gauge bosons at forward rapidities
• Measurement of vector boson plus $D^{\ast }(2010{)}^{+}$ meson production in $\bar{p}p$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$
• Measurement of the production of a $W$ boson in association with a charmed hadron in $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$ with the ATLAS detector
• A brief review of measurements of electroweak bosons at the LHCb experiment in LHC Run 1
• Review of recent LHCb results and prospects for Run II
• Searches for Majorana Neutrinos and Direct Searches for Exotics at LHCb
• Observation of Top Quark Production in the Forward Region at LHCb
• Forward W + c, b-jet and Top Measurements with LHCb
• Measuring quark polarizations at ATLAS and CMS
• Measurement of the top-quark production cross-section and charge asymmetry at LHCb
• Forward EW Physics at the LHC