Correlations of μμ, eμ, and ee pairs in p+p collisions at s√=200 GeV and implications for cc¯ and bb¯ production mechanisms

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2019-01-01
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Aidala, C.
Ogilvie, Craig
Apadula, Nicole
Hill, John
Hotvedt, Nels
Lajoie, John
Lebedev, Alexandre
Lee, S. H.
Ogilvie, Craig
Patel, Milap
Perry, Joshua
Rinn, Timothy
Rosati, Marzia
Runchey, Jonathan
Sen, Abhisek
Shimomura, M.
Timilsina, Arbin
et al.
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Abstract

PHENIX has measured the azimuthal correlations of muon pairs from charm and bottom semi-leptonic decays in p+p collisions at s√=200 GeV, using a novel analysis technique utilizing both unlike- and like-sign muon pairs to separate charm, bottom and Drell-Yan contributions. The dimuon measurements combined with the previous electron-muon and dielectron measurements span a wide range in rapidity, and are well described by PYTHIA Tune A. Through a Bayesian analysis based on PYTHIA Tune A, we show that leading order pair creation is the dominant (76%±1419%) contribution for bb¯ production, whereas the data favor the scenario in which next-to-leading-order processes dominate cc¯ production. The small contribution of next-to-leading-order processes in bb¯ production at the collision energies of the Relativistic Heavy Ion Collider contrasts with the case at Large-Hadron-Collider energies, where next-to-leading-order processes are expected to dominate.

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<p>This is a pre-print of the article Aidala, C., Y. Akiba, M. Alfred, V. Andrieux, N. Apadula et al. "Correlations of μμ, eμ, and ee pairs in p+p collisions at s√=200 GeV and implications for cc¯ and bb¯ production mechanisms." <em>arXiv preprint arXiv:1805.04075v1</em> (2019). Posted with permission.</p>
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