The anti-Λ/Λ and anti-Λ/K0S production ratios are measured by the LHCb detector from 0.3 nb^-1 of pp collisions delivered by the LHC at sqrt(s) = 0.9 TeV and 1.8 nb^-1 at sqrt(s) = 7 TeV. Both ratios are presented as a function of transverse momentum, pT, andrapidity, y, in the ranges 0.15 < pT < 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 = ybeam − y, and are consistent with previous measurements. The ratio anti-Λ/Λ, measuring the transport of baryonnumber from the collision into the detector, is smaller in data than predicted in simulation, particularly at high rapidity. The ratio anti-Λ/K0S , measuring the baryon-to-meson suppressionin strange quark hadronisation, is significantly larger than expected.

Measurement of V0 production ratios in pp collisions at s√ = 0.9 and 7TeV / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., G., A., P., A.C., A. A., A., S., A., Y., A., J., A., R. B., A., O., A.G., L., A., A., A., M., A., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - STAMPA. - 2011:(2011), pp. 034-1-034-21. [10.1007/JHEP08(2011)034]

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

BIZZETI, Andrea;
2011

Abstract

The anti-Λ/Λ and anti-Λ/K0S production ratios are measured by the LHCb detector from 0.3 nb^-1 of pp collisions delivered by the LHC at sqrt(s) = 0.9 TeV and 1.8 nb^-1 at sqrt(s) = 7 TeV. Both ratios are presented as a function of transverse momentum, pT, andrapidity, y, in the ranges 0.15 < pT < 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 = ybeam − y, and are consistent with previous measurements. The ratio anti-Λ/Λ, measuring the transport of baryonnumber from the collision into the detector, is smaller in data than predicted in simulation, particularly at high rapidity. The ratio anti-Λ/K0S , measuring the baryon-to-meson suppressionin strange quark hadronisation, is significantly larger than expected.
2011
2011
034-1
034-21
Measurement of V0 production ratios in pp collisions at s√ = 0.9 and 7TeV / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., G., A., P., A.C., A. A., A., S., A., Y., A., J., A., R. B., A., O., A.G., L., A., A., A., M., A., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - STAMPA. - 2011:(2011), pp. 034-1-034-21. [10.1007/JHEP08(2011)034]
R., Aaij; B., Adeva; M., Adinolfi; C., Adrover; A., Affolder; Z., Ajaltouni; J., Albrecht; F., Alessio; M., Alexander; G., Alkhazov; P., Alvarez Carte...espandi
File in questo prodotto:
File Dimensione Formato  
Aaij2011_Article_MeasurementOfV0ProductionRatio.pdf

Open access

Tipologia: VOR - Versione pubblicata dall'editore
Dimensione 477.65 kB
Formato Adobe PDF
477.65 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/706136
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 30
  • ???jsp.display-item.citation.isi??? 28
social impact