FONLL Heavy Quark Production
Calculate total or single inclusive differential cross
sections for heavy quark production (charm or bottom) at
ppbar or pp colliders, with cuts on pT
and y or eta.
Non perturbative fragmentation into heavy hadrons and their subsequent
decays into other final states (leptons, quarkonia, ...) can also be
Use of the "back" button in the browser to come back to the form after
having produced a set of results can occasionally lead to unexpected behaviour,
and is deprecated. Reloading the form from scratch is safer and preferable,
until this bug is fixed.
- 05 Dec 2022 - Changed default PDF set to NNPDF30nlo_as0118, where available. Added 5.03 TeV with this PDF set.
- 03 Aug 2022 - Addition 13.6 TeV CM energy
- 11 Feb 2022 - Addition of new CM energies, 8.16 TeV and 68.6 GeV
- 11 Oct 2018 - Addition of double-differential output options ds/dpt/dy and ds/dpt/deta
- 09 Jan 2016 - Fixed bug (introduced on 23/12/2015) preventing correct selection of decay
to electrons option
- 23 Dec 2015 - New interface, with responsive framework for mobile devices and option to email results.
No change in physics results.
- 28 Sep 2015 - Modified smearing function used in integrations. Change in results
should be well below 1%
Be sure to check the older news
, as well as the list of
discovered so far.
Feedback to email@example.com
Preferred reference for FONLL:
Reference for these specific predictions:
Central values: mb = 4.75 GeV for bottom, mc = 1.5 GeV for charm,
μR = μF =
μ0 = sqrt(m2 + pT2)
Scales uncertainties: μ0/2 < μR, μF < 2μ0
with 1/2 < μR/μF < 2.
Mass uncertainties: mb = 4.5, 5.0 GeV for bottom, mc = 1.3, 1.7 GeV for charm, summed in quadrature to scales uncertainties.
PDFs uncertainties: calculated according to the individual PDF set recipe, and summed in quadrature to scales and mass uncertainties.
No fragmentation fractions (unless specified above)
are included for the heavy quark -> heavy hadron fragmentation.
This means that all heavy quarks are hadronised as if they fragmented
into the chosen heavy hadron.
To construct the proper mixing, the correct fragmentation fraction (FF) must be
provided and the results summed separately.
The D0 and D+ already include feedown from D*.
The correct branching ratios (BR) for weak decays into leptons and other hadrons are instead
© 2007-2022 Matteo Cacciari