125281002
Photoproduction of $K \bar{K} \pi$ Final States in the Photon Energy Range From 20-{GeV} to 70-{GeV}
CERN-OMEGA PHOTON COLLABORATION. PHOTOPRODUCTION OF & lt;K AK PI& gt; FINAL STATES IN THE ENERGY RANGE 20 TO 70 GEV. NO EVIDENCE IS FOUND FOR THE PHOTOPRODUCTION OF PHIPRIME(1680).
121682572
Correlations between two identified charged hadrons at the CERN ISR
Abstract We have measured the value of the correlation R (h 1 , h 2 ) between two identified charged hadrons ( h = π ± , K ± , p or p ) produced in pp collisions at the CERN ISR. One hardon was produced in the forward direction and the other at a large angle. Quantum number dependent effects have been observed.
56182755
TRACK FINDING AND FITTING IN THE H1 FORWARD TRACK DETECTOR
Abstract The tracking environment in the H1 Forward Track Detector, where the hit multiplicity from proton fragments is high, is particularly hostile. The techniques and software which have been developed for pattern recognition and Kalman fitting of charged particle tracks in this region are described in detail.
122240842
Multiplicities associated with the production of pions, kaons or protons of high transverse momentum, at the ISR
Abstract In high-energy proton-proton collisions, the mean charged multiplicity M in the central region, associated with a high-PT hadron trigger at 90°, shows a linear dependence on both ln s and PT. M is measured to depend on the type (π ± , K ± , p or p ) of the idenfied high-PT trigger particle.
121816869
Associated photoproduction of a charmed meson and a charmed baryon
122300884
Forward electroproduction of single charged pions in the resonance region using a deuterium target
Abstract The rates for forward electroproduction of single charged pions from deutrium have been measured in the resonance region, at a virtual photon mass squared ≈−0.5( GeV/ c 2 ) 2 . Results are presented in the form of a π− to π + cross-section ratio.
121139428
Weak gravitational field of a superconducting domain wall
SummaryThe Newtonian gravitational field of a flat, infinite superconducting domain wall that can be endowed with charge and /or current is investigated using the linear approximation of general relativity. It is found that such a domain wall can possess a Newtonian gravitational field that is everywhererepulsive, everywhereattractive, orrepulsive at smaller distances andattractive at larger ones, depending upon the amount of charge and /or current supported by the wall.
119027742
Generalized dilaton-Maxwell cosmic string and wall solutions
Abstract The class of static solutions found by Gibbons and Wells for dilaton-electrodynamics in flat spacetime, which describe nontopological strings and walls that trap magnetic flux, is extended to a class of dynamical solutions supporting arbitrarily large, nondissipative traveling waves, using techniques previously applied to global and local topological defects. These solutions can then be used in conjunction with S-duality to obtain more general solitonic solutions for various axidilaton-Maxwell theories. As an example, a set of dynamical solutions is found for axion, dilaton, and Maxwell fields in low energy heterotic string theory using the SL ( 2 , R ) invariance of the equations of motion.
124068899
Structure equations for a monopole model with a coleman-weinberg potential
SummaryA model consisting of aSO3 gauge field interacting with an isovector Higgs field is investigated. When the Higgs mass parameter vanishes, no symmetry breakdown occurs at the tree level, but may be induced at the one-loop level. The one-loop effective potential is of the Coleman-Weinberg type, which is required of many new inflationary cosmological scenarios. Approximate equations determining the structure of a magnetic monopole are obtained at the one-loop level of this model.RiassuntoSi studia un modello ehe consiste in un campo di gauge SO3 che interagisce con un campo di Higgs isovettoriale. Quando il parametro di massa di Higgs si annulla non si verifica una rottura di simmetria a livello di albero, ma tale rottura si può indurre a livello di un loop. Il Potenziale efficace ad un loop è del tipo di Coleman-Weinberg, cui sono richiesti molti nuovi scenari di espansione cosmologica. Si ottengono equazioni approssimate che determinano la struttura di un monopolo magnetico al livello di un loop di questo modello.
118565299
Short note on the stabilty of a dilatonic wall
A nontopological soliton solution of dilaton–Maxwell theory describes a domain wall-like solution which confines magnetic flux in its core (Gibbons and Wells, Class Quant Grav 11:2499, 1994). Since the solution is not stabilized by a nontrivial topology of the vacuum manifold, it is interesting to see if the static solution is stable against small fluctuations. We consider the stability of the solution in response to small fluctuations in the scalar and magnetic fields. It is determined that the ansatz solution does indeed exhibits stability.
123068294
Sourceless Abelian gauge strings
SummaryAn Abelian gauge theory is investigated in the limit of vanishing Higgs fields. Exact, nonperturbative solutions are found which signal the presence of structureless gauge strings. These solutions may be static or time-dependent, but the time-dependent solution varies exponentially with field energy and momentum flowing radially inward toward the gauge string.