# name
Measurement of V 0   production ratios in pp  collisions at s  √   = 0.9 and 7 TeV

# metadata.dc.description.abstract[].value
The Λ¯/Λ and Λ¯/K0S production ratios are measured by the LHCb detector from 0.3 nb−1 of pp collisions delivered by the LHC at s√=0.9 TeV and 1.8 nb−1 at s√=7 TeV. Both ratios are presented as a function of transverse momentum, p T, and rapidity, y, in the ranges 0.15 < p T < 2.50 GeV/c and 2.0 < y < 4.5. Results at the two energies are in good agreement as a function of rapidity loss, ∆y = y beam − y, and are consistent with previous measurements. The ratio Λ¯/Λ , measuring the transport of baryon number from the collision into the detector, is smaller in data than predicted in simulation, particularly at high rapidity. The ratio Λ¯/K0S , measuring the baryon-to-meson suppression in strange quark hadronisation, is significantly larger than expected.

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Journal of High Energy Physics, 2011, vol. 8, num. 34, p. 1-22

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Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
Measurement of V 0   production ratios in pp  collisions at s  √   = 0.9 and 7 TeV