Measurement of D*(+/-) meson production in jets from pp collisions at root s=7 TeV with the ATLAS detector
Popovic, D. S.
Vranješ Milosavljević, Marija
ATLAS Collaboration (ukupan broj autora: 3004)
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This paper reports a measurement of D*(+/-) meson production in jets from proton- proton collisions at a center- of- mass energy of root 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 vertical bar eta vertical bar LT 2.5. D*(+/-) mesons found in jets are fully reconstructed in the decay chain: D*(+/-)- GT D-0 pi(+), D-0 - GT 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 LT z LT 1. Monte Carlo predictions fail to describe the data at small values of z, and this is most marked at low jet transverse momentum.
Извор:Physical Review D, 2012, 85, 5
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