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Measurement of the D-s+-D-s- production asymmetry in 7 TeV pp collisions
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LHCb Collaboration (Including: Back, J. J., Craik, Daniel, Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Whitehead, M. (Mark) and Williams, M. P.). (2012) Measurement of the D-s+-D-s- production asymmetry in 7 TeV pp collisions. Physics Letters B, Volume 713 (Number 3). pp. 186-195. doi:10.1016/j.physletb.2012.06.001 ISSN 0370-2693.
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WRAP_art%3A10.1007%2FJHEP07%282012%29133.pdf - Published Version Available under License Creative Commons Attribution. Download (919Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.physletb.2012.06.001
Abstract
Heavy quark production in 7 TeV centre-of-mass energy pp collisions at the LHC is not necessarily flavour symmetric. The production asymmetry, AP, between and mesons is studied using the ϕπ± decay mode in a data sample of 1.0 fb−1 collected with the LHCb detector. The difference between π+ and π− detection efficiencies is determined using the ratios of fully reconstructed to partially reconstructed D⁎± decays. The overall production asymmetry in the rapidity region 2.0 to 4.5 with transverse momentum larger than 2 GeV is measured to be AP=(−0.33±0.22±0.10)%. This result can constrain models of heavy flavour production.
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