16,223,471 research outputs found
The dimension of a variety
We invent the notion of a {\it dimension of a variety} as the cardinality
of all its proper {\it derived} subvarieties (of the same type). The dimensions
of varieties of lattices, varieties of regular bands and other general
algebraic structures are determined.Comment: The results of the paper were presented at the workshop AAA71 and
CYA21 at B\c{e}dlewo, Poland on February 11, 2006. the paper is submitted to
Discussiones Mathematicae Algebra and Stochastc Methods, special issu
On -Whittaker functions
The -Whittaker functions are eigenfunctions of the modular -deformed
open Toda system introduced by Kharchev, Lebedev, and
Semenov-Tian-Shansky. Using the quantum inverse scattering method, the named
authors obtained a Mellin-Barnes integral representation for these
eigenfunctions. In the present paper, we develop the analytic theory of the
-Whittaker functions from the perspective of quantum cluster algebras. We
obtain a formula for the modular open Toda system's Baxter operator as a
sequence of quantum cluster transformations, and thereby derive a new modular
-analog of Givental's integral formula for the undeformed Whittaker
function. We also show that the -Whittaker functions are eigenvectors of the
Dehn twist operator from quantum higher Teichm\"uller theory, and obtain
-analogs of various integral identities satisfied by the undeformed
Whittaker functions, including the continuous Cauchy-Littlewood identity of
Stade and Corwin-O'Connell-Sepp\"al\"ainen-Zygouras. Using these results, we
prove the unitarity of the -Whittaker transform, thereby completing the
analytic part of the proof of the conjecture of Frenkel and Ip on tensor
products of positive representations of , as well as the
main step in the modular functor conjecture of Fock and Goncharov. We conclude
by explaining how the theory of -Whittaker functions can be used to derive
certain hyperbolic hypergeometric integral evaluations found by Rains.Comment: 36 pages, minor changes, references adde
LHCb Results on Semileptonic B/B/ Decays
Studies of semileptonic decays of b hadrons with the LHCb experiment are
reported. In particular, measurements of the b hadron production fractions at
the LHC and Bs semileptonic decays in P-wave charmed mesons are presented. An
outlook of the LHCb potential in measuring the CKM matrix elements Vub and Vcb,
as well as decays involving taus, is given.Comment: Proceedings of CKM 2012, the 7th International Workshop on the CKM
Unitarity Triangle, University of Cincinnati, USA, 28 September - 2 October
201
CDF Results on Decays
We present recent CDF results on lifetimes, meson mass measurements,
ratios of branching ratios, and rare decays. In addition, we present the first
measurement of time-dependent mixing at CDF. Several results have been
updated and a few new ones included since the workshop.Comment: 13 pages, LaTex using world_sci.sty, 18 figures in uuencoded ps file.
Contribution to the proceedings of the LISHEP95 Workshop on Heavy Flavor
Physics, Rio de Janeiro, Brazil, February 20-22, 1995. Also available at:
http://www-cdf.fnal.gov/physics/conf95/cdf3152_rio95_b_decays.p
B decays on the lattice
I review recent developments in lattice calculations of B decay matrix
elements and other related quantities.Comment: LATTICE99(plenary), 12 pages, 7 postscript figures, uses espcrc2.sty,
references are update
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