Measurement of F_2^{c\bar{c}} and F_2^{b\bar{b}} at Low Q^2 and x using the H1 Vertex Detector at HERA

Abstract

Measurements are presented of inclusive charm and beauty cross sections in e^+p collisions at HERA for values of photon virtuality 12 \le Q^2 \le 60 GeV^2 and of the Bjorken scaling variable 0.0002 \le x \le 0.005. The fractions of events containing charm and beauty quarks are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. Values for the structure functions F_2^{c\bar{c}} and F_2^{b\bar{b}} are obtained. This is the first measurement of F_2^{b\bar{b}} in this kinematic range. The results are found to be compatible with the predictions of perturbative quantum chromodynamics and withprevious measurements of F_2^{c\bar{c}}.

24 pages, 9 figures, 2 tables

References in corpus (22)

• High-Energy-Physics Event Generation with PYTHIA 6.1
• Successive Combination Jet Algorithm For Hadron Collisions
• Deep-Inelastic Inclusive ep Scattering at Low x and a Determination of alpha_s
• Parton distributions incorporating QED contributions
• Parton Distributions of the Proton
• Hadronic photon-photon interactions at high energies
• An Ordered Analysis of Heavy Flavour Production in Deep Inelastic Scattering
• Hadronic final state predictions from CCFM: the hadron-level Monte Carlo generator CASCADE
• CTEQ6 Parton Distributions with Heavy Quark Mass Effects
• The H1 Silicon Vertex Detector
• Measurement of F_2^ccbar and F_2^bbbar at High Q^2 using the H1 Vertex Detector at HERA
• Measurement of D^(*+-) Meson Production and F_2^c in Deep-Inelastic Scattering at HERA
• Inclusive $D^0$ and $D^{\ast }\pm$ Production in Deep Inelastic $ep$ Collisions at HERA
• Measurement of D*+- production in deep inelastic ep scattering at HERA
• Charm quark and D^* cross sections in deeply inelastic scattering at DESY HERA
• On the Kinematic Reconstruction of Deep Inelastic Scattering at HERA: the $\Sigma$ Method
• Inclusive Production of D^+, D^0, D_s^+ and D^*+ Mesons in Deep Inelastic Scattering at HERA
• Measurement of Beauty Production at HERA Using Events with Muons and Jets
• Measurement of beauty production in deep inelastic scattering at HERA
• Comparison between the various descriptions for charm electroproduction and the HERA-data
• Status of CCFM - unintegrated gluon densities
• A Variable Flavour Number Scheme at NNLO

Cited by in corpus (72)

• Parton distributions for the LHC
• New parton distribution functions from a global analysis of quantum chromodynamics
• The CT10 NNLO Global Analysis of QCD
• Uncertainties on alpha_S in global PDF analyses and implications for predicted hadronic cross sections
• Parton distribution functions and benchmark cross sections at NNLO
• Heavy quarks in deep-inelastic scattering
• AAMQS: A non-linear QCD analysis of new HERA data at small-x including heavy quarks
• The 3-, 4-, and 5-flavor NNLO Parton from Deep-Inelastic-Scattering Data and at Hadron Colliders
• Dynamical NNLO parton distributions
• Update of Parton Distributions at NNLO
• A Variable-Flavour Number Scheme for NNLO
• Dynamical parton distributions of the nucleon and very small-x physics
• Impact parameter dependent colour glass condensate dipole model
• Heavy-quark mass dependence in global PDF analyses and 3- and 4-flavour parton distributions
• Heavy Quark Mass Effects in Deep Inelastic Scattering and Global QCD Analysis
• Saturation QCD predictions with heavy quarks at HERA
• Measurement of the Charm and Beauty Structure Functions using the H1 Vertex Detector at HERA
• Light-Cone Models for Intrinsic Charm and Bottom
• Phenomenology of nonperturbative charm in the nucleon
• Deep Inelastic Electron-Nucleon Scattering at the LHC
• Collider Physics at HERA
• Further success of the colour dipole model
• Variable Flavor Number Parton Distributions and Weak Gauge and Higgs Boson Production at Hadron Colliders at NNLO of QCD
• Measurement of charm and beauty production in deep inelastic ep scattering from decays into muons at HERA
• Measurement of beauty and charm production in deep inelastic scattering at HERA and measurement of the beauty-quark mass
• Measurement of D^{*\pm} Meson Production and Determination of F_2^{ccbar} at low Q2 in Deep-Inelastic Scattering at HERA
• Structure Functions
• HERA-data in the light of small x evolution with state of the art NLO input
• Diffractive Open Charm Production in Deep-Inelastic Scattering and Photoproduction at HERA
• The Quark and Gluon Structure of the Proton
• Mapping the sensitivity of hadronic experiments to nucleon structure
• Heavy-quark contributions to the ratio F_L/F_2 at low x
• Measurement of the D* Meson Production Cross Section and F_2^{ccbar}, at High Q^2, in ep Scattering at HERA
• Charting the coming synergy between lattice QCD and high-energy phenomenology
• Higher order QCD corrections to charged-lepton deep-inelastic scattering and global fits of parton distributions
• Improved formulation of global QCD analysis with zero-mass hard cross sections
• Production of D* Mesons with Dijets in Deep-Inelastic Scattering at HERA
• The Effect of LHC Jet Data on MSTW PDFs
• Measurement of Charm and Beauty Dijet Cross Sections in Photoproduction at HERA using the H1 Vertex Detector
• Higgs Boson Cross Section from CTEQ-TEA Global Analysis
• Measurement of beauty production in DIS and F_2^bbbar extraction at ZEUS
• Search for intrinsic charm in vector boson production accompanied by heavy flavor jets
• Measurement of Charm and Beauty Jets in Deep Inelastic Scattering at HERA
• On the Perturbative Stability of the QCD Predictions for the Ratio $R=F_L/F_T$ in Heavy-Quark Leptoproduction
• ${\gamma }^{\ast }p$ cross section from the dipole model in momentum space
• New parton distributions in fixed flavour factorization scheme from recent deep-inelastic-scattering data
• Beauty photoproduction using decays into electrons at HERA
• Measurement of the $b$ Jet Cross Section in Events with a $Z$ Boson in $p\bar{p}$ Collisions at $\sqrt{s}$=1.96 TeV
• Charm and longitudinal structure functions with the Kharzeev-Levin-Nardi model
• Measurement of open beauty production at HERA in the D* muon final state
• Experimental consistency in parton distribution fitting
• Measurement of beauty production from dimuon events at HERA
• What did HERA teach us about the structure of the proton?
• The BFKL-Regge factorization and $F_2^b$, $F_2^c$, $F_L$ at HERA: physics implications of nodal properties of the BFKL eigenfunctions
• Measurement of beauty production in deep inelastic scattering at HERA using decays into electrons
• Charm Production and QCD Analysis at HERA and LHC
• A Hybrid Scheme for Heavy Flavors: Merging the FFNS and VFNS
• Measurement of Beauty Photoproduction near Threshold using Di-electron Events with the H1 Detector at HERA
• The Physics of Heavy Quark Distributions in Hadrons: Collider Tests
• Beauty, charm and $F_L$ at HERA: new data vs. early predictions
• Top structure function at the LHeC
• Dipole model analysis of the newest diffractive deep inelastic scattering data
• The ratio of the beauty structure functions $R^b=F_L^b/F_2^b$ at low x
• Dynamical projections for the visualization of PDFSense data
• The predictions of the charm structure function exponents behaviour at low x in deep inelastic scattering
• NLO corrections to the hard pomeron behavior of the charm structure functions $F_k^c(k=2,L)$ at low x
• Geometrical scaling in charm structure function ratios
• Deep inelastic beauty production at HERA in the kt-factorization approach
• Heavy quarks structure functions $F_2^{q\bar{q}}(x,Q^2)$ and $F_L^{q\bar{q}}(x,Q^2)$ at the NLO approximation
• Proton structure at the LHC
• QCD Physics with ZEUS and H1 at HERA
• Nonlinear corrections to the nuclear heavy flavor structure functions