Measurement of Ds ± production asymmetry in pp collisions at √s=7 and 8 TeV

Abstract: The inclusive D± s production asymmetry is measured in pp collisions collected by the LHCb experiment at centre-of-mass energies of √ s = 7 and 8 TeV. Promptly produced D± s mesons are used, which decay as D± s → φπ±, with φ → K+K−. The measurement is performed in bins of transverse momentum, pT, and rapidity, y, covering the range 2.5 < pT < 25.0 GeV/c and 2.0 < y < 4.5. No kinematic dependence is observed. Evidence of nonzero D± s production asymmetry is found with a significance of 3.3 standard deviations.

Document Type

Article

Published version

Language

English

Subjects and keywords

Hadrons; Gran Col·lisionador d'Hadrons; Física de partícules; Experiments; Hadrons; Large Hadron Collider (France and Switzerland); Particle physics; Experiments

Publisher

Springer Verlag

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Reproducció del document publicat a: https://doi.org/10.1007/JHEP08(2018)008

Journal of High Energy Physics, 2018, vol. 2018, num. 8, p. 1-21

https://doi.org/10.1007/JHEP08(2018)008

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cc-by (c) LHCb Collaboration (UB: Alfonso Albero, A. et al., 2018

https://creativecommons.org/licenses/by/4.0/

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Física Quàntica i Astrofísica [2993]

ISGlobal - Institut de Salut Global de Barcelona [61312]