Abstract
This paper reports a measurement of D*+/- meson production in jets from proton-proton collisions at a center-of-mass energy of sqrt(s) = 7 TeV at the CERN Large Hadron Collider. The measurement is based on a data sample recorded with the ATLAS detector with an integrated luminosity of 0.30 pb^-1 for jets with transverse momentum between 25 and 70 GeV in the pseudorapidity range |eta| < 2.5. D*+/- mesons found in jets are fully reconstructed in the decay chain: D*+ -> D0pi+, D0 -> K-pi+, and its charge conjugate. The production rate is found to be N(D*+/-)/N(jet) = 0.025 +/- 0.001(stat.) +/- 0.004(syst.) for D*+/- mesons that carry a fraction z of the jet momentum in the range 0.3 < z < 1. Monte Carlo predictions fail to describe the data at small values of z, and this is most marked at low jet transverse momentum.
Highlights
Heavy flavor production in high-energy interactions has produced interesting tests of quantum chromodynamics (QCD) and valuable information on fragmentation and decay properties
One method to study the production of heavy quarks is to measure DÃÆ mesons produced inside jets [10,11,17,18] by fully reconstructing the decay chain: DÃþ ! D0þ, D0 ! KÀþ and its charge conjugate
The Monte Carlo (MC) simulated events used for the correction of the signal yield for detector effects are produced with the PYTHIA 6.421 event generator [23]
Summary
Heavy flavor production in high-energy interactions has produced interesting tests of quantum chromodynamics (QCD) and valuable information on fragmentation and decay properties. Measurements of b-hadron production cross sections in high-energy pp" collisions [1,2,3,4] were higher than the available theoretical calculations. New measurements of heavy flavor production will help in testing improved QCD-based models. One method to study the production of heavy quarks is to measure DÃÆ mesons produced inside jets [10,11,17,18] by fully reconstructing the decay chain: DÃþ ! This paper reports a measurement of DÃÆ meson production in jets from proton-proton collisions at a center-of-mass energy of. Where pkðDÃÆÞ is the momentum of the DÃÆ meson along the jet axis; EðjetÞ is the energy of the DÃÆ jet; NDÃÆðpT; zÞ is the number of jets that contain a DÃÆ meson, in the corresponding pT and z bin, and NjetðpTÞ is the number of inclusive jets in the pT bin
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