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Signatures of CP violation in the presence of multiple b-pair production at hadron colliders
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We calculate the production of two b-quark pairs in hadron collisions. Sources of multiple pairs are multiple interactions and higher order perturbative QCD mechanisms. We subsequently investigate the competing effects of multiple b-pair production on measurements of CP violation: (i) the increase in event rate with multiple b-pair cross sections which may reach values of the order of 1 b in the presence of multiple interactions and (ii) the dilution of b versus b tagging efficiency because of the presence of events with four B mesons. The impact of multiple B-meson production is small unless the cross section for producing a single pair exceeds 1 mb. We show that even for larger values of the cross section the competing effects (i) and (ii) roughly compensate so that there is no loss in the precision with which CP-violating CKM angles can be determined.
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HALZEN, Francis, GONZÁLEZ GARCÍA, Ma. concepción, STELZER, T., VÁZQUEZ, R. a.. Signatures of CP violation in the presence of multiple b-pair production at hadron colliders. _Physical Review D_. 1995. Vol. 51, núm. 9, pàgs. 4861-4866. [consulta: 9 de gener de 2026]. ISSN: 0556-2821. [Disponible a: https://hdl.handle.net/2445/12494]