Measurement of V0 production ratios in pp collisions at s√ = 0.9 and 7TeV

作者：Aaij R.; Adeva B.; Adinolfi M.; Adrover C.; Affolder A.; Ajaltouni Z.; Albrecht J.; Alessio F.; Alexander M.; Alkhazov G.; Cartelle P.A.; Alves Jr A.A.; Amato S.; Amhis Y.; Anderson J.; Appleby R.B.; Gutierrez O.A.; Arrabito L.; Artamonov A.; Artuso M.; Aslanides E.; Auriemma G.; Bachmann S.; Back J.J.; Bailey D.S.; Balagura V.; Baldini W.; Barlow R.J.; Barschel C.; Barsuk S.; Barter W.; Bates A.; Bauer C.; Bauer T.; Bay A.; Bediaga I.; Belous K.; Belyaev I.; Ben-Haim E.; Benayoun M.

来源：Journal of High Energy Physics, 2011, 2011(8).

• Hadron-hadron scattering

The Ā/A and Ā/K0 S production ratios are measured by the LHCb detector from 0.3 nb-1 of pp collisions delivered by the LHC at s√ = 0.9TeV and 1.8 nb-1 at s√ = 7TeV. Both ratios are presented as a function of transverse momentum, pT, and rapidity, y, in the ranges 0.15 < pT < 2.50GeV/c and 2.0 < y < 4.5. Results at the two energies are in good agreement as a function of rapidity loss, Δy = ybeam - y, and are consistent with previous measurements. The ratio Ā/A, 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 Ā/K0 S , measuring the baryon-to-meson suppression in strange quark hadronisation, is significantly larger than expected.

• 出版日期2011
• 单位清华大学