Publication : t18/049

Z boson production in bottom-quark fusion: a study of b-mass effects beyond leading order

Forte S. (Dipartimento di Fisica, Università degli Studi di Milano and INFN via Celoria 16, I-20133 Milano, ITALY)
Napoletano D. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Ubiali M. (Department of Applied Mathematics and Theoretical Physics (DAMTP), Center for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, England UNITED KINGDOM (UK))
Abstract:
We compute the total cross-section for Z boson production in bottom-quark fusion, applying to this case the method we previously used for Higgs production in bottom fusion. Namely, we match, through the FONLL procedure, the next-to-next-to-leading-log five-flavor scheme result, in which the b quark is treated as a massless parton, with the next-to-leading-order O(alphas^3) four- flavor scheme computation in which bottom is treated as a massive final-state particle. Our computation provides a test-case for the discussion of issues of scale dependence and treatment of heavy quarks, which we discuss in light of our results.
Année de publication : 2018
Preprint : arXiv:1803.10248
Langue : Anglais

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