45. Impact of heavy-flavour production cross sections measured by the LHCb experiment on parton distribution functions at low x.
Collaboration PROSA (.)
The impact of recent measurements of heavy-flavour production in deep inelastic electron-proton scattering and in proton-proton collisions on parton distribution functions is studied in a QCD analysis in the fixed-flavour number scheme at next-to-leading order. Differential cross sections of charm- and beauty-hadron production measured by LHCb are used together with inclusive and...
Collaboration H1 and ZEUS (DESY), Gerhard Immanuel Brandt (Berkeley Lab (US))
An extendend QCD analysis of the new combined inclusive HERA was performed at NLO, also including HERA data on jet and charm production. This enables the simultaneous measurement of parton distribution functions and the strong coupling using data from HERA alone. The strong coupling is measured to be alpha_s(M_Z0) = 0.1182 ±0.0008(exp) ±0.0005(model/param.) ±0.0012(hadronisation)...
Pedro Jimenez-Delgado (Jefferson Lab), Prof. Tim Londergan (Indiana University), Wally Melnitchouk (Jefferson Lab)
212. On the intrinsic heavy quark content of the nucleon and its impact on heavy new physics at the LHC
Florian Lyonnet (LPSC)
Heavy quark parton distribution functions (PDFs) play an important role in several Standard Model and New Physics processes. Most analyses rely on the assumption that the charm and bottom PDFs are generated perturbatively by gluon splitting and do not involve any non-perturbative degrees of freedom. On the other hand, non- perturbative, intrinsic heavy quark parton distributions have been...