125525593
HADRON JETS IN 400-GeV p p COLLISIONS
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
122626036
Recent results from E-810
Abstract I discuss data from E-810 including K 0 and Λ production, the rise in production of negative particles at small m ⊥ , and the rapidity distributions. The data are compared to various models; in particular they do not agree with a model indicating large nuclear transparency.
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.
122061850
Measurement of elastic proton proton scattering in pure initial-spin states
119783273
Factorisation and inclusive photoproduction
Abstract Inclusive photoproduction cross sections for π ± and Λ in the fragmentation region of the proton are predicted via factorisation from hadron initiated reactions. Comparison with existing data is favourable.
121701561
Unitarity bounds for inelastic diffraction
Unitarity in the s-channel is invoked to derive an upper bound for the inelastic diffractive cross-section as a func- tion of impact parameter. The application of this bound to high-energy proton-proton scattering strongly suggests that inelastic diffraction should be peripheral in the impact parameter space. Introduction. Recent observation of a structure around t = -0.2 GeV 2 in the differential cross-section of the process pp ~ p(n,r +) at the CERN ISR (1 ) sup- ports the assumption that inelastic diffraction, unlike elastic diffraction, is peripheral in the impact param- eter space. This assumption has been made very plaus- ible in the past by many authors (2-6), partially on intuitive grounds, partially on the basis of phenome- nological analyses of experimental data. In this letter we suggest that the previous conclu- sion is in fact a very natural consequence of s-channel unitarity and of the assumption that inelastic, as well as elastic diffraction, is the shadow of non-diffractive particle production. Using these assumptions, Pumplin has recently derived the following bound (7) :
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.
91843025
Diffractive processes and the triple-pomeron
123478569
Coherent production on nuclei does not measure total cross sections for unstable particles
We calculate diffractive production in nucleon-nucleus collisions using a parton model. We fit the result by the standard optical-model formula, and obtain estimates of 12--30 mb for the cross section of the diffractively produced system on a nucleon. The actual value of that cross section in the model is 65 mb. Estimates for the total cross section of an unstable hadron which are based on the A dependence of coherent production should therefore not be trusted.