3075702
New effective Feynman-like rules for the multi-Regge QCD asymptotics of inclusive multijet production.
New effective Feynman-like rules are defined for inclusive multijet cross sections in the multi-Regge regime. The solution of the Balitskii-Fadin-Kuraev-Lipatov (BFKL) equation is used as a starting point. The resulting rules involve conformal weight and rapidity as a momentum and a coordinate, respectively, and are translation invariant in the coordinates. We use the effective rules to calculate ultrahigh-energy asymptotics of inclusive multijet production. The dependence on the parton densities occurs only in the overall normalization of the asymptotic cross sections. {copyright} {ital 1996 The American Physical Society.}
14138268
Effective Regge QCD
A new framework for a high energy limit of quantum gauge field theories is introduced. Its potency is illustrated on a new derivation of the reggeization of the gluon.
41858666
Cosmological constraints on heavy unstable particles.
We present cosmological constraints for the heavy unstable particles. The main result is the lifetime versus mass plot of the heavy unstable particles M. These kinds of particles are predicted in many composite-fermion models. If the grand unification mass M/sub X/ is around 10/sup 15/ GeV, dimension-6 M-decaying operators are necessary to allow heavy composite particles above 10/sup 7.6/ GeV.
37465442
Fermion mass matrix and strong CP solution in SU(5).
A global U(1)/sub A/ symmetry is used to solve both the fermion-mass-hierarchy problem and the strong CP problem. A domain-wall-free invisible-axion model requires heavy fermions at the axion scale. The dominant contribution to the off-diagonal elements of the fermion mass matrix comes from the small vacuum expectation value of superheavy scalar doublets, which is guaranteed by the Peccei-Quinn symmetry.
16050754
Cosmological constant and soft terms in supergravity.
Some of the soft supersymmetry breaking parameters in the hidden sector supergravity model depend on the expectation value of the hidden sector scalar potential, [l angle][ital V][sub [ital h]][r angle], whose tree level value is equal to the tree level cosmological constant. The current practice of calculating soft parameters assumes that [l angle][ital V][sub [ital h]][r angle]=0. Quantum correction to the cosmological constant can differ from the correction to [l angle][ital V][sub [ital h]][r angle] by an amount of order [ital m][sub 3/2][sup 2][ital M][sub Pl][sup 2]/8[pi]. This implies that, for the vanishing cosmological constant, the [l angle][ital V][sub [ital h]][r angle]-dependent parts of soft terms can be sizable, and hence the supergravity phenomenology should be accordingly modified.
29225985
Fission of heavy nuclei induced by stopped antiprotons. I. Inclusive characteristics of fission fragments.
Antiproton-induced fission has been investigated with a novel double-arm fission fragment spectrometer. Inclusive distributions of total mass, individual mass, and total kinetic energy of the fragments, and of the momentum of the fissioning nucleus, were measured. A dynamical model which takes into account all stages of [ital [bar p]]-induced fission (atomic cascade, intranuclear cascade, evaporation cascade, fission of compound nucleus, evaporation from fission fragments) was formulated for the first time. In particular, the dynamics of the descent of fissioning nuclei from saddle point to scission point are described by the diffusion model. The data on [ital [bar p]]-induced fission were analyzed in the framework of this model and good agreement between experiment and theory was obtained.
46735209
Linear canonical transformations of coherent and squeezed states in the Wigner phase space. II. Quantitative analysis.
Il est possible de calculer les valeurs d'expectation et les probabilites de transition a partir de la fonction de distribution phase-espace de Wigner. Sur la base des proprietes de transformation canonique de la fonction de Wigner, n developpe un algorithme pour calculer ces quantites en optique quantique, pour des etats coherents et compresses