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arXiv · 1805.04075

Correlations of $\mu\mu$, $e\mu$, and $ee$ pairs in $p$+$p$ collisions at $\sqrt{s}=200$ GeV and implications for $c\bar{c}$ and $b\bar{b}$ production mechanisms

C. Aidala·Y. Akiba·M. Alfred·V. Andrieux·N. Apadula·H. Asano·B. Azmoun·V. Babintsev·A. Bagoly·N. S. Bandara·K. N. Barish·S. Bathe·A. Bazilevsky·M. Beaumier·R. Belmont·A. Berdnikov·Y. Berdnikov·D. S. Blau·M. Boer·J. S. Bok·M. L. Brooks·J. Bryslawskyj·V. Bumazhnov·S. Campbell·V. Canoa Roman·R. Cervantes·C. Y. Chi·M. Chiu·I. J. Choi·J. B. Choi·Z. Citron·M. Connors·N. Cronin·M. Csanád·T. Csörgő·T. W. Danley·M. S. Daugherity·G. David·K. DeBlasio·K. Dehmelt·A. Denisov·A. Deshpande·E. J. Desmond·A. Dion·D. Dixit·J. H. Do·A. Drees·K. A. Drees·J. M. Durham·A. Durum·A. Enokizono·H. En'yo·S. Esumi·B. Fadem·W. Fan·N. Feege·D. E. Fields·M. Finger·M. Finger, Jr.·S. L. Fokin·J. E. Frantz·A. Franz·A. D. Frawley·Y. Fukuda·C. Gal·P. Gallus·P. Garg·H. Ge·F. Giordano·Y. Goto·N. Grau·S. V. Greene·M. Grosse Perdekamp·T. Gunji·H. Guragain·T. Hachiya·J. S. Haggerty·K. I. Hahn·H. Hamagaki·H. F. Hamilton·S. Y. Han·J. Hanks·S. Hasegawa·T. O. S. Haseler·X. He·T. K. Hemmick·J. C. Hill·K. Hill·A. Hodges·R. S. Hollis·K. Homma·B. Hong·T. Hoshino·N. Hotvedt·J. Huang·S. Huang·K. Imai·M. Inaba·A. Iordanova·D. Isenhower
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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 $\sqrt{s}=200$ 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 $(76\%\pm^{14}_{19}\%)$ contribution for $b\bar{b}$ production, whereas the data favor the scenario in which next-to-leading-order processes dominate $c\bar{c}$ production. The small contribution of next-to-leading-order processes in $b\bar{b}$ 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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C. Aidala, Y. Akiba, M. Alfred, V. Andrieux, N. Apadula, H. Asano, B. Azmoun, V. Babintsev, A. Bagoly, N. S. Bandara, K. N. Barish, S. Bathe, A. Bazilevsky, M. Beaumier, R. Belmont, A. Berdnikov, Y. Berdnikov, D. S. Blau, M. Boer, J. S. Bok, M. L. Brooks, J. Bryslawskyj, V. Bumazhnov, S. Campbell, V. Canoa Roman, R. Cervantes, C. Y. Chi, M. Chiu, I. J. Choi, J. B. Choi, Z. Citron, M. Connors, N. Cronin, M. Csanád, T. Csörgő, T. W. Danley, M. S. Daugherity, G. David, K. DeBlasio, K. Dehmelt, A. Denisov, A. Deshpande, E. J. Desmond, A. Dion, D. Dixit, J. H. Do, A. Drees, K. A. Drees, J. M. Durham, A. Durum, A. Enokizono, H. En'yo, S. Esumi, B. Fadem, W. Fan, N. Feege, D. E. Fields, M. Finger, M. Finger, Jr., S. L. Fokin, J. E. Frantz, A. Franz, A. D. Frawley, Y. Fukuda, C. Gal, P. Gallus, P. Garg, H. Ge, F. Giordano, Y. Goto, N. Grau, S. V. Greene, M. Grosse Perdekamp, T. Gunji, H. Guragain, T. Hachiya, J. S. Haggerty, K. I. Hahn, H. Hamagaki, H. F. Hamilton, S. Y. Han, J. Hanks, S. Hasegawa, T. O. S. Haseler, X. He, T. K. Hemmick, J. C. Hill, K. Hill, A. Hodges, R. S. Hollis, K. Homma, B. Hong, T. Hoshino, N. Hotvedt, J. Huang, S. Huang, K. Imai, M. Inaba, A. Iordanova, D. Isenhower. 2018-05-10. Correlations of $\mu\mu$, $e\mu$, and $ee$ pairs in $p$+$p$ collisions at $\sqrt{s}=200$ GeV and implications for $c\bar{c}$ and $b\bar{b}$ production mechanisms. https://arxiv.org/abs/1805.04075

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