7,154 research outputs found
Reaching the minimum ideal in a finite semigroup
We introduce the depth parameters of a finite semigroup, which measure how
hard it is to produce an element in the minimum ideal when we consider
generating sets satisfying some minimality conditions. We estimate such
parameters for some families of finite semigroups, and we obtain an upper bound
for wreath products and direct products of two finite (transformation) monoids.
Keywords: semigroup, generating set, minimum ideal, A-depth of a semigroupComment: 29 page
Energy dependence of elliptic flow of -meson in STAR at RHIC
We present the measurement of elliptic flow () as a function of
transverse momentum () for the -meson in Au+Au collisions at
= 7.7, 11.5 and 39 GeV. At low -meson
decreases with decrease in beam energy. The number of constituent quark
() scaled for -meson vs ()/ follows similar trend as other hadrons for
= 39 GeV whereas the scaled for
-mesons follows a different trend compared to the other hadrons at
= 11.5 GeV.Comment: Conference proceedings for Strangeness in Quark Matter 2011, Cracow,
Poland, September 18-24, 201
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