Double-parton scattering effects in D0B+ and B+B+ meson-meson pair production in proton-proton collisions at the LHC

摘要

We extend our previous studies of double-parton scattering (DPS) to simultaneous production of c c ˉ and b b ˉ and production of two pairs of b b ˉ . The calculation is performed within a factorized ansatz. Each parton scattering is calculated within the k T -factorization approach. The hadronization is done with the help of fragmentation functions. Production of D mesons in our framework was tested in our previous works. Here, we present our predictions for B mesons. A good agreement is achieved with the LHCb data. We present our results for c c ˉ b b ˉ and b b ˉ b b ˉ final states. For completeness, we compare results for double- and single-parton scattering (SPS). As for the c c ˉ c c ˉ final state, the DPS dominates over the SPS, especially for small transverse momenta. We present several distributions and integrated cross sections with realistic cuts for simultaneous production of D 0 B + and B + B + , suggesting future experimental studies at the LHC.