A determination of m c (m c ) from HERA data using a matched heavy-flavor scheme

(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image) Abstract The charm quark mass is one of the fundamental parameters of the Standard Model Lagrangian. In this work we present a determination of the ... charm mass from a fit to the inclusive and charm HERA deep-inelastic structure function data. The analysis is performed within the xFitter framework, with structure functions computed in the FONLL general-mass scheme as implemented in APFEL. In the case of the FONLL-C scheme, we obtain m c (m c )=1.335 ± 0.043(exp) -0.000 +0.019 (param) -0.008 +0.011 (mod) -0.008 +0.003 (th) GeV. We also perform an analogous determination in the fixed-flavor-number scheme at next-to-leading order, finding m c (m c )=1.318 ± 0.054(exp) -0.010 +0.011 (param) -0.004 +0.015 (mod) -0.004 +0.045 (th) GeV, compatible with the FONLL-C value. Our results are consistent with previous determinations from DIS data as well as with the PDG world average. [MediaObject not available: see fulltext.]