Is X(3872) a bound state?

Is the Upsilon a Bound State of Exotic Quarks?*

To explain the T-T' mass splitting of the recently discovered T resonances, we interpret them as bound states of a quark and an antiquark which are not members of the fundamental (2) representation of color SU(2). A quark in the 8 (or maybe 5) representation is consistent with the data. We discuss some of its properties and the phenomenological consequences that follow from our suggestion. (Sub...

Bound State Problem Solution

A bound for Feichtinger conjecture

In this paper‎, ‎using the discrete Fourier transform in the finite-dimensional Hilbert space C^n‎, ‎a class of nonRieszable equal norm tight frames is introduced ‎and‎ using this class, a bound for Fiechtinger Conjecture is presented. By the Fiechtinger Conjecture that has been proved recently, for given A,C>0 there exists a universal constant delta>0 independent of $n$ such that every C-equal...

Hierarchy Problem and a new Bound State ∗

Instead of solving fine-tuning problems by some automatic method or by cancelling the quadratic divergencies in the hierarchy problem by a symmetry (such as SUSY), we rather propose to look for a unification of the different fine-tuning problems. Our unified fine-tuning postulate is the so-called Multiple Point Principle, according to which there exist many vacuum states with approximately the ...

A narrow DNN quasi-bound state

M. Bayar, C. W. Xiao, T. Hyodo, A. Doté, M. Oka and E. Oset Departamento de F́ısica Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Aptdo. 22085, 46071 Valencia, Spain Department of Physics, Kocaeli University, 41380 Izmit, Turkey Department of Physics, Tokyo Institute of Technology, Meguro 152-8551, Japan High Energy Accelerator Research Orga...