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Title: Up-, down-, strange-, charm-, and bottom-quark masses from four-flavor lattice QCD

Journal Article · · Physical Review D

Here, we calculate the up-, down-, strange-, charm-, and bottom-quark masses using the MILC highly improved staggered-quark ensembles with four flavors of dynamical quarks. We use ensembles at six lattice spacings ranging from a≈0.15 to 0.03 fm and with both physical and unphysical values of the two light and the strange sea-quark masses. We use a new method based on heavy-quark effective theory (HQET) to extract quark masses from heavy-light pseudoscalar meson masses. Combining our analysis with our separate determination of ratios of light-quark masses we present masses of the up, down, strange, charm, and bottom quarks. Our results for the $$ \overline{MS}\ $$-renormalized masses are mu(2 GeV)=2.130(41) MeV, md(2 GeV)=4.675(56) MeV, ms(2 GeV)=92.47(69) MeV, mc(3 GeV)=983.7(5.6) MeV, and mc(mc)=1273(10) MeV, with four active flavors; and mb(mb)=4195(14) MeV with five active flavors. We also obtain ratios of quark masses mc/ms=11.783(25), mb/ms=53.94(12), and mb/mc=4.578(8). The result for mc matches the precision of the most precise calculation to date, and the other masses and all quoted ratios are the most precise to date. Moreover, these results are the first with a perturbative accuracy of α 4 s . As byproducts of our method, we obtain the matrix elements of HQET operators with dimension 4 and 5: $$ \overline{Λ}\ $$MRS=555(31) MeV in the minimal renormalon-subtracted (MRS) scheme, μ 2 π =0.05(22) GeV2, and μ 2 G (mb)=0.38(2) GeV2. The MRS scheme is the key new aspect of our method.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
Fermilab Lattice, MILC, and TUMQCD Collaborations
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357; FG02-91ER40628; FC02-12ER41879; SC0010120; FG02-91ER40661; FG02-13ER42001; SC0015655; SC0010005; FG02-13ER41976; SC0012704; AC02-07CH11359
OSTI ID:
1474191
Alternate ID(s):
OSTI ID: 1422192
Report Number(s):
arXiv:1802.04248; FERMILAB-PUB-17-492-T; TUM-EFT-107-18; FERMILAB-PUB-17/492-T; TUM-EFT-107/18; PRVDAQ; 054517
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 98 Journal Issue: 5; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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Electric dipole moment of Hg 199 atom from P , C P -odd electron-nucleon interaction journal April 2019
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