Physics and Astronomy
Journal or Book Title
Physical Review C
We report a measurement of e+e− pairs from semileptonic heavy-flavor decays in p+p collisions at √sNN=200 GeV. The e+e− pair yield from b¯b and c¯c is separated by exploiting a double differential fit done simultaneously in dielectron invariant mass and pT. We used three different event generators, pythia, mc@nlo, and powheg, to simulate the e+e− spectra from c¯c and b¯b production. The data can be well described by all three generators within the detector acceptance. However, when using the generators to extrapolate to 4π, significant differences are observed for the total cross section. These difference are less pronounced for b¯b than for c¯c. The same model dependence was observed in already published d+A data. The p+p data are also directly compared with d+A data in mass and pT, and within the statistical accuracy no nuclear modification is seen.
American Physical Society
Adare, A.; Apadula, Nicole; Hill, John C.; Hotvedt, Nels J.; Kempel, Todd; Lajoie, John G.; Lebedev, Alexandre; Ogilvie, Craig; Patel, Milap R.; Pei, H.; Rinn, Timothy T.; Rosati, Marzia; Runchey, Jonathan C.; Semenov, Alexey Yu.; Sen, Abhisek; Shimomura, M.; Timilsina, Arbin; Vale, Carla; Wei, Feng; et. al; and PHENIX Collaboration, "Measurements of e+e− pairs from open heavy flavor in p + p and d + A collisions at √ sNN = 200 GeV" (2017). Physics and Astronomy Publications. 497.