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

(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).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 sub( )cm sub( )c=1.335 plus or minus 0.043(exp) sub(-0.000) super(+0.019)(param) sub(-0.008) super(+0.011)(mod) sub(-0.008) super(+0.003)(th) GeV. We also perform an analogous determination in the fixed-flavor-number scheme at next-to-leading order, finding m sub( )cm sub( )c=1.318 plus or minus 0.054(exp) sub(-0.010) super(+0.011)(param) sub(-0.004) super(+0.015)(mod) sub(-0.004) super(+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.]