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arXiv · 1102.3148

The like-sign dimuon charge asymmetry at the Tevatron: corrections from B meson fragmentation

Alexander Mitov
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Abstract

The existing predictions for the like-sign dimuon charge asymmetry at the Tevatron are expressed in terms of parameters related to B mesons' mixing and inclusive production fractions. We show that in the realistic case when phase-space cuts are applied, the asymmetry depends also on the details of the production mechanism for the B mesons. In particular, it is sensitive to the difference in the fragmentation functions of B^0_d and B^0_s mesons. We estimate these fragmentation effects and find that they shift the theory prediction for this observable by approximately 10%. We also point out the approximately 20% sensitivity of the asymmetry depending on which set of values for the B meson production fractions is used: as measured at the Z pole or at the Tevatron. The impact of these effects on the extraction of A^s_{SL} from the DØmeasurement is presented.

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Alexander Mitov. 2011-07-20. The like-sign dimuon charge asymmetry at the Tevatron: corrections from B meson fragmentation. https://doi.org/10.1103/physrevd.84.014035

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