119722876
Measurement of the dijet cross section in 400-GeV pp collisions
The invariant cross section for production of jet pairs in 400-GeV/c pp interactions has been measured as a function of p{tau} in the p{tau} range 4 to 9 GeV/c. The results are in good agreement with predictions of perturbative QCD models. 20 refs., 3 figs., 1 tab.
12119345
Event Selection Using Adaptive Gaussian Kernels
The invention relates to polymorphic markers (two tetranucleotide, one dinucleotide repeat polymorphisms, 27 markers characterized by primer pairs 1A-27A, and eleven markers characterized by primer pairs 1B-11B that are useful for human individualization. Applications are in forensic medicine and for paternity and prenatal screening as well as genetic mapping. These markers are characterized by sets of oligonucleotide primers according to the invention useful in PCR amplification and DNA segment resolution. The invention further relates to an assay for measuring the subtle differences in genetic material regarding an added or omitted set of dinucleotide or tetranucleotide repeat polymorphisms which comprises obtaining an amount of nucleotide segments effective for testing, amplifying the segments by the PCR procedure using at least one primer nucleotide sequence according to the present invention, resolving the amplified segments using gel electrophoresis, and comparing the resolved segments by autoradiography to observe the differences in migration patterns due to structural differences. The assay according to the invention is easy to perform and results can be obtained within 24 hours. It is not uncommon for results to be available within 3-4 hours. Accordingly, the invention also relates to an improved PCR procedure and a PCR assay kit which comprise nucleotides according to the invention.
117756001
New measurement of the total cross-section in proton proton scattering in pure spin states
122061850
Measurement of elastic proton proton scattering in pure initial-spin states
125525593
HADRON JETS IN 400-GeV p p COLLISIONS
44392950
Measurement of the dijet cross section in 400-GeV/c pp interactions.
The invariant cross section for production of jet pairs in 400-GeV/c pp interactions has been measured as a function of p/sub T/ in the p/sub T/ range 4 to 9 GeV/c. The results are in good agreement with predictions of a perturbative QCD model. Details of the experiment and the procedures used to extract the jet signal are given.
121339748
MOMENTUM TRANSFER DEPENDENCE IN DIFFRACTION DISSOCIATION.
Abstract The mechanism of kinematic coupling between momentum transfers in producing a low mass two particle system with double-peripheral dynamics is studied theoretically and model calculations. A method of data analysis which eliminates the effects of this kinematic reflection is presented. The data of the reaction pp → pnπ + at 19 GeV/ c have been analyzed using this method. It is seen that the high production slope of the low mass ηπ + system observed in this process is not a cosequences of double-peripheral dynamics plus kinematics but must be explicitly present in the invariant matrix element.
121161753
Simple structure of charged neutral correlations
Abstract All available high-energy data agree with the assumption that the charged versus neutral pion multiplicities are described by a binomial distribution. This distribution is obtained in a variety of models. One of these is the Mueller model, supplied with the assumption of the absence of exotic contributions. In contrast to this, a binomial distribution cannot be obtained in any neutral cluster model.
122801502
Quark Dynamics of Polarization in Inclusive Hadron Production
The parton-recombination model plus SU(6) symmetry is used to relate polarizations in inclusive baryon production to those of the underlying constituent subprocesses. A large number of predictions are given, none of which disagrees with experiment. It is suggested that the polarization arises via Thomas precession of the quarks' spins in the recombination process. This description accounts for all of the qualitative features of the baryon and antibaryon polarization data.
122328611
On the charge structure of high-energy multiple production
Correlations between neutral and charged particles produced in high-energy collisions are studied. The associated average multiplicity 〈n0〉n and the associated moment (f200) are expressed in terms of the Mueller moments. An isospin analysis of the pion - pion correlations is performed with the help of Mueller-Regge techniques. From this analysis, the slope of 〈n0〉n− is predicted to be asymptotically about 0.75. This asymptotic limit should be approached already at ISR energies. Finally, predictions are given for the associated moment (f200)n−, and the importance of the measurements of this quantity is emphasized.
121154418
Dual properties of strangeness annihilation processes
Abstract The dual properties of strangeness annihilation processes are studied. Experimental evidence is presented for such processes building up a low-lying Regge singularity. Quark-diagram arguments suggest that this singularity is the exchange degenerate f'- ϕ trajectory. The possibility of studying the factorization properties of strangeness annihilation processes using hyperon beams is pointed out.