3 research outputs found
A Pure-Glue Hidden Valley I. States and Decays
It is possible that the standard model is coupled, through new massive
charged or colored particles, to a hidden sector whose low energy dynamics is
controlled by a pure Yang-Mills theory, with no light matter. Such a sector
would have numerous metastable "hidden glueballs" built from the hidden gluons.
These states would decay to particles of the standard model. We consider the
phenomenology of this scenario, and find formulas for the lifetimes and
branching ratios of the most important of these states. The dominant decays are
to two standard model gauge bosons, or by radiative decays with photon
emission, leading to jet- and photon-rich signals.Comment: 34 pages, 4 figure
I-odd sector of the Klebanov-Strassler theory
The Klebanov-Strassler background is invariant under the Z_2 symmetry I,
which acts by exchanging the bi-fundamental fields A and B, accompanied by the
charge conjugation. We study the background perturbations in the I-odd sector
and find an exhaustive list of bosonic states invariant under the global
SU(2)*SU(2) symmetry. In addition to the scalars identified in an earlier
publication arXiv:0712.4404 we find 7 families of massive states of spin 1.
Together with the spin 0 states they form 3 families of massive vector
multiplets and 2 families of massive gravitino multiplets, containing a vector,
a pseudovector and fermions of spin 3/2 and 1/2. In the conformal
Klebanov-Witten case these I-odd particles belong to the N=1 superconformal
Vector Multiplet I and Gravitino Multiplets II and IV. The operators dual to
the I-odd singlet sector include those without bi-fundamental fields making an
interesting connection with the pure N=1 SYM theory. We calculate the mass
spectrum of the corresponding glueballs numerically and discuss possible
applications of our results.Comment: 34 pages, 3 figures, 2 table