Speaker
Prof.
Ethan Neil
(University of Colorado, Boulder)
Description
I present updated spectroscopy results from the LSD collaboration on
SU(3) gauge theory with $N_f=8$ degenerate fermions in the fundamental
representation, using nHYP-smeared staggered fermions. The new results
include added statistics, a more sophisticated systematic error analysis,
and the use of joint fits to stabilize estimates of the $0^{++}$ scalar
meson mass. We find persistent evidence for a very light $0^{++}$ scalar,
roughly degenerate with the pions and far below the rest of the spectrum.
A detailed comparison with the $N_f=4$ theory using the same lattice action
is also presented.
Primary author
Prof.
Ethan Neil
(University of Colorado, Boulder)
Co-authors
Prof.
Anna Hasenfratz
(university of colorado boulder)
Claudio Rebbi
David Schaich
(University of Bern)
Dr
Enrico Rinaldi
(RIKEN BNL Research Center)
Dr
Evan Weinberg
(Boston University)
Prof.
George Fleming
(Yale University)
James Osborn
(ANL)
Oliver Witzel Witzel
(University of Colorado Boulder)
Prof.
Richard C. Brower
(Boston University)
Xiaoyong Jin
(ANL)