36 research outputs found
The impact of the LHCb production cross-section on parton distribution functions and determining the mass of heavy quarks
In this work, the impact of recent measurements of heavy-flavour production
in collisions on parton distribution functions (PDFs) and their
uncertainties is studied. In this regard, the absolute and normalised cross
sections of beauty hadron production measured by LHCb at center-of-mass energy
of 7 TeV and 13 TeV are separately included in the next-to-leading order (NLO)
global QCD analysis together with the measurements of the inclusive and
heavy-flavour production cross sections at HERA. It is illustrated that the
heavy-flavour data of the LHCb experiment impose additional constraints on the
PDFs, especially on the gluon distribution at low partonic fractions of the
proton momentum. One of the most important results of the present analysis is
the significant reduction of the gluon uncertainties in the region less than
that can play a crucial rule in many areas of high energy physics
investigations.Comment: 36 pages, 8 figures, has been accepted for publication in Nuclear
Physics