2012/08/31 by ALICE Collaboration, B. Abelev, J. Adam +98
Physics and Astronomy · #Astrophysics #Baryon #Galaxy #High-Energy Particle Collisions Research #Large Hadron Collider #Luminosity #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Perturbative QCD #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Rapidity #Strangeness #hep-ex
paper · pdf · doi:10.1016/j.physletb.2012.10.049
published as Phys. Lett. B 718 (2012) 279-294 · 26 pages, 5 captioned figures, 4 tables, authors from page 21, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/3027
openalex publication_date 2012/10/24 · openalex created_date 2016/06/24 · arxiv created 2016/11/23 · arxiv updated 2016/11/24 · openalex updated_date 2026/08/06
The p T -differential inclusive production cross section of the prompt charm-strange meson D + s in the rapidity range |y| < 0.5 was measured in proton-proton collisions at s = 7 TeV at the LHC using the ALICE detector. The analysis was performed on a data sample of 2.98 10 8 events collected with a minimum-bias trigger. The corresponding integrated luminosity is L int = 4.8 nb -1 . Reconstructing the decay D + s + , with K -K + , and its charge conjugate, about 480 D s mesons were counted, after selection cuts, in the transverse momentum range 2 < p T < 12 GeV/c. The results are compared with predictions from models based on perturbative QCD. The ratios of the cross sections of four D meson species (namely D 0 , D + , D * + and D + s ) were determined both as a function of p T and integrated over p T after extrapolating to full p T range, together with the strangeness suppression factor in charm fragmentation. The obtained values are found to be compatible within uncertainties with those measured by other experiments in e + e -, ep and pp interactions at various centre-of-mass energies.