TY  - JOUR
AU  - Bruno, Mattia
AU  - Finkenrath, Jacob
AU  - Knechtli, Francesco
AU  - Leder, Björn
AU  - Sommer, Rainer
TI  - Effects of Heavy Sea Quarks at Low Energies
JO  - Physical review letters
VL  - 114
IS  - 10
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - PUBDB-2016-00412
M1  - WUP-14-11
M1  - DESY 14-190
M1  - SFB-CPP-14-78
M1  - arXiv:1410.8374
SP  - 102001
PY  - 2015
AB  - We present a factorization formula for the dependence of light hadron masses and low energy hadronic scales on the mass M of a heavy quark: apart from an overall mass-independent factor Q, ratios such as r<sub>0</sub>(M)/r<sub>0</sub>(0) are computable in perturbation theory at large M. The perturbation theory part is stable concerning different loop orders. Our nonperturbative Monte Carlo results obtained in a model calculation, where a doublet of heavy quarks is decoupled, match quantitatively to the perturbative prediction. Upon taking ratios of different hadronic scales at the same mass, the perturbative function drops out and the ratios are given by the decoupled theory up to M<sup>−2</sup> corrections. We verify—in the continuum limit—that the sea quark effects of quarks with masses around the charm mass are very small in such ratios.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000352073400009
C6  - pmid:25815925
DO  - DOI:10.1103/PhysRevLett.114.102001
UR  - https://bib-pubdb1.desy.de/record/293257
ER  -