The production cross sections for prompt charmed mesons D-0, D+, D*(+) and D-s(+) were measured at mid-rapidity in proton-proton collisions at a centre-of-mass energy root s = 7 TeV with the ALICE detector at the Large Hadron Collider (LHC). D mesons were reconstructed from their decays D-0 -> K-pi(+), D+ -> K- pi(+)pi(+), D*(+) -> D-0 pi(+), D-s(+) -> phi pi(+) -> K-K+pi(+), and their charge conjugates. With respect to previous measurements in the same rapidity region, the coverage in transverse momentum (p(T)) is extended and the uncertainties are reduced by a factor of about two. The accuracy on the estimated total c (c) over bar production cross section is likewise improved. The measured p(T)-differential cross sections are compared with the results of three perturbative QCD calculations.

Measurement of D-meson production at mid-rapidity in pp collisions at √s=7 TeV

BOCA, GIANLUIGI;COSTANZA, SUSANNA;ROTONDI, ALBERTO;
2017-01-01

Abstract

The production cross sections for prompt charmed mesons D-0, D+, D*(+) and D-s(+) were measured at mid-rapidity in proton-proton collisions at a centre-of-mass energy root s = 7 TeV with the ALICE detector at the Large Hadron Collider (LHC). D mesons were reconstructed from their decays D-0 -> K-pi(+), D+ -> K- pi(+)pi(+), D*(+) -> D-0 pi(+), D-s(+) -> phi pi(+) -> K-K+pi(+), and their charge conjugates. With respect to previous measurements in the same rapidity region, the coverage in transverse momentum (p(T)) is extended and the uncertainties are reduced by a factor of about two. The accuracy on the estimated total c (c) over bar production cross section is likewise improved. The measured p(T)-differential cross sections are compared with the results of three perturbative QCD calculations.
2017
Applied Physics/Condensed Matter/Materials Science encompasses the resources of three related disciplines: Applied Physics, Condensed Matter Physics, and Materials Science. The applied physics resources are concerned with the applications of topics in condensed matter as well as optics, vacuum science, lasers, electronics, cryogenics, magnets and magnetism, acoustical physics and mechanics. The condensed matter physics resources are concerned with the study of the structure and the thermal, mechanical, electrical, magnetic and optical properties of condensed matter. They include superconductivity, surfaces, interfaces, thin films, dielectrics, ferroelectrics and semiconductors. The materials science resources are concerned with the physics and chemistry of materials and include ceramics, composites, alloys, metals and metallurgy, nanotechnology, nuclear materials, adhesion and adhesives. Resources dealing with polymeric materials are listed in the Organic Chemistry/Polymer Science category.
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Engineering (miscellaneous); Physics and Astronomy (miscellaneous)
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Acharya, S.; Adamovã¡, D.; Aggarwal, M. M.; Aglieri Rinella, G.; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, N.; Ahn, S. U.; Aiola, S.; Akindinov, A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/1197540
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