Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Determining the Uncertainty on the Total Heavy Flavor Cross Section

Conference ·
We assess the theoretical uncertainties on the total heavy quark cross section. We discuss the importance of the quark mass, the scale choice, the number of light flavors and the parton densities on the estimate of the uncertainty. At first glance, the uncertainty bands on the total charm cross sections obtained by integrating the FONLL inclusive cross section and by integrating the partonic total cross sections appear to be incompatible. We explain how this apparent difference arises and describe how the two results can be reconciled. The small charm quark mass amplifies the effect of varying the other parameters in the calculation, making the uncertainty on the total charm cross section difficult to quantify. On the other hand, the bottom quark total cross section is under much better theoretical control and differences between the two approaches are small.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
945504
Report Number(s):
LLNL-CONF-405682
Country of Publication:
United States
Language:
English

References (20)

Open Charm Yields in d + A u Collisions at s N N = 200     G e V journal February 2005
Large-p⊥ hadroproduction of heavy quarks journal June 1994
The p T spectrum in heavy-flavour photoproduction journal March 2001
Inclusive jet production, parton distributions, and the search for new physics journal October 2003
Open heavy-flavour production at RHIC journal July 2007
The total cross section for the production of heavy quarks in hadronic collisions journal July 1988
Sudakov resummation and finite order expansions of heavy quark hadroproduction cross sections journal October 2001
QCD Predictions for Charm and Bottom Quark Production at RHIC journal September 2005
The one particle inclusive differential cross section for heavy quark production in hadronic collisions journal November 1989
New Generation of Parton Distributions with Uncertainties from Global QCD Analysis journal July 2002
Measurement of High- p T Single Electrons from Heavy-Flavor Decays in p + p Collisions at s = 200     GeV journal December 2006
Measurement of single muons at forward rapidity in p + p collisions at s = 200     GeV and implications for charm production journal November 2007
Next-to-next-to-leading order soft-gluon corrections in top quark hadroproduction journal December 2003
The total charm cross section journal March 2008
Threshold corrections in bottom and charm quark hadroproduction at next-to-next-to-leading order journal August 2004
The p T spectrum in heavy-flavour hadroproduction journal May 1998
Threshold effects in charm hadroproduction journal April 2003
The A-Dependence of Open Charm and Bottom Production journal April 2003
QCD corrections to heavy quark production in hadron-hadron collisions journal March 1991
Dynamical parton distributions revisited journal September 1998

Similar Records

Understanding Heavy Flavor Production at RHIC
Conference · Wed Jan 07 23:00:00 EST 2009 · OSTI ID:945882
The total charm cross section
Journal Article · Fri Sep 14 00:00:00 EDT 2007 · European Physical Journal Special Topics , vol. 155, N/A, March 29, 2008, pp. 213-222 · OSTI ID:929184
Heavy flavor production
Conference · Fri Jun 10 00:00:00 EDT 1988 · OSTI ID:6396538

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
PROBES
QUARKS
TOTAL CROSS SECTIONS