Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: \tau - \mu Flavor Violation as a Probe of the Scale of New Physics   Motivated by the recent strong experimental evidence of large \nu_mu-\nu_tau
neutrino mixing, we explore current bounds on the analogous mixing in the
charged lepton sector. We present a general formalism for dimension-6 fermionic
effective operators involving tau-mu mixing with typical Lorentz structure
(\bar{mu} \Gamma tau)(\bar{q}^a \Gamma {q}^b), and discuss their relationship
to the standard model gauge symmetry and the underlying flavor dynamics. We
derive the low-energy constraints on the new physics scale associated with each
operator, mostly from current experimental bounds on rare decay processes of
tau, hadrons or heavy quarks. For operators involving at least one light quark
(u,d,s), these constraints typically give a bound on the new physics scale of a
few TeV or higher. Those operators with two heavy quarks turn out to be more
weakly constrained at the present, giving bounds of a few hundred GeV. A few
scalar and pseudo-scalar operators are free from all current experimental
constraints.

37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc