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 sqrt(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 + → φ{symbol} π +, with φ{symbol} → 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

Ds+ meson production at central rapidity in proton-proton collisions at sqrt(s) = 7 TeV / Abelev, B., Adam, J., Adamova, D., Adare, A.M., Aggarwal, M.M., Rinella G., A., Agocs, A.G., Agostinelli, A., Salazar S., A., Ahammed, Z., Ahmad, N., Masoodi A., A., Ahn, S.A., Ahn, S.U., Akindinov, A., Aleksandrov, D., Alessandro, B., Molina R., A., Alici, A., Alkin, A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 718:2(2012), pp. 279-294. [10.1016/j.physletb.2012.10.049]

Ds+ meson production at central rapidity in proton-proton collisions at sqrt(s) = 7 TeV

BRUNO, Giuseppe Eugenio;
2012

Abstract

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 sqrt(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 + → φ{symbol} π +, with φ{symbol} → 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
2012
http://www.sciencedirect.com/science/article/pii/S0370269312011033
Ds+ meson production at central rapidity in proton-proton collisions at sqrt(s) = 7 TeV / Abelev, B., Adam, J., Adamova, D., Adare, A.M., Aggarwal, M.M., Rinella G., A., Agocs, A.G., Agostinelli, A., Salazar S., A., Ahammed, Z., Ahmad, N., Masoodi A., A., Ahn, S.A., Ahn, S.U., Akindinov, A., Aleksandrov, D., Alessandro, B., Molina R., A., Alici, A., Alkin, A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 718:2(2012), pp. 279-294. [10.1016/j.physletb.2012.10.049]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/967
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