期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 8, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP08(2011)034
关键词
Hadron-Hadron Scattering
资金
- CAPES
- CNPq
- FAPERJ
- FINEP (Brazil)
- CERN
- NSFC (China)
- CNRS/IN2P3 (France)
- BMBF
- DFG
- HGF
- MPG (Germany)
- SFI (Ireland)
- INFN (Italy)
- FOM
- Rosatom (Russia)
- MICINN
- XUNGAL
- GENCAT (Spain)
- SNSF
- SER (Switzerland)
- NAS Ukraine (Ukraine)
- STFC (United Kingdom)
- NSF (USA)
- ERC
- Region Auvergne
- STFC [ST/H001085/2, ST/I002839/1, ST/F007094/1, ST/H006737/1, ST/I505572/1, LHCb, ST/H001093/2, ST/K00073X/1, ST/K004646/1, ST/H001026/1, ST/H001093/1, ST/G502412/1, PP/E002722/1, LHCb Upgrades, ST/H001026/2, ST/G005974/1, PP/E000347/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/E000347/1, ST/H001093/1, PP/E002722/1, LHCb Upgrades, ST/H006737/1, GRIDPP, ST/K00073X/1, LHCb, ST/G502412/1, ST/H001085/2, ST/F007094/1, ST/H001093/2, ST/I002839/1, ST/H001026/1, ST/H001026/2, ST/G005974/1, ST/I505572/1] Funding Source: researchfish
- ICREA Funding Source: Custom
The (Lambda) over bar/Lambda and (Lambda) over bar /K-S(0) production ratios are measured by the LHCb detector from 0.3 nb(-1) of pp collisions delivered by the LHC at root s = 0.9TeV and 1.8 nb-1 at root s = 7TeV. Both ratios are presented as a function of transverse momentum, p(T), and rapidity, y, in the ranges 0.15 < p(T) < 2.50GeV/c and 2.0 < y < 4.5. Results at the two energies are in good agreement as a function of rapidity loss, Delta y = y(beam) - y, and are consistent with previous measurements. The ratio (Lambda) over bar/Lambda, 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 (Lambda) over bar /K-S(0), measuring the baryon-to-meson suppression in strange quark hadronisation, is significantly larger than expected.
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