Inclusive pion production in 360 GeV/cpp interactions

In a study of proton-proton interactions at √s=26GeV, inclusive distributions of single pions and systems of pions of various charge combinations are presented, as well as the production ratio obtained in association with various trigger particles. The results are compared to current phenomenological models in an attempt to understand multiparticle productions in hadron collisions

Measurement of electroweak parameters from hadronic and leptonic decays of the Z 0

We have studied the reactions e + e − →hadrons, e + e − , μ + μ − and τ + τ − , in the energy range 88.2 GeV. A total luminosity of 5.5 pb −1 , corresponding to approximately 115000 hadronic and 10000 leptonic Z 0 decays, has been recorded with the L3 detector. From a simultaneous fit to all of our measured cross section data, we obtain assuming lepton universality:Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47890/1/10052_2005_Article_BF01475788.pd

Управление системой электрохимической защиты магистрального газопровода в условиях вечной мерзлоты

Объектом исследования подсистема коррозионного мониторинга электрохимической зашиты магистрального газопровода. Цель работы – проанализировать управление системой электрохимической зашиты магистрального газопровода в условиях вечной мерзлоты. В результате анализа установлено, что ПКМ-ТСТ-КонтКорр удовлетворяет требованиям системы управления техническим состоянием и целостностью площадных объектов организации.The object of study is the subsystem of corrosion monitoring of electrochemical protection of the main gas pipeline. The purpose of the work is to analyze the management of the system of electrochemical protection of the main gas pipeline in permafrost conditions. As a result of the analysis, it was established that PKM-TST-KontKorr satisfies the requirements of the system for managing the technical condition and integrity of the organization’s area facilities

Analysis of transverse momentum distributions for pp interactions at 360 GeV/c in the framework of a quark-diquark fragmentation model

Using a quark-diquark fragmentation model, in which either the Field-Feynman or the Lund model is coupled with a quark-diquark distribution function, we study transverse momentum distributions,pT, for the inclusive reactions pp→hadron +anything at 360 GeV/c. We find that a primordial mean transverse momentum <kT>0.4 GeV/c can well reproduce the pT 2 distributions of charged hadrons, π0,K s 0 , Λ0,K∗ and ∑∗ and the Feynman x-pT correlations. We confirm that a diquark in a proton plays an important role in reproducing the x-p T correlation of Λ0

InclusiveK's and Σ's production in 360 GeV/c ρρ interactions using the European hybrid spectrometer

We have studied the inclusive production of strange meson and baryon resonances in 360 GeV/c pp interactions. Cross sections for K+(892) and K–(892) are estimated to be 4.42±0.62 mb and 2.54±0.47 mb respectively and those for ∑+(1385) and ∑–(1385) are 0.67±0.11 mb and 0.26±0.07 mb respectively. Longitudinal and transverse momentum distributions for K (892) and ∑(1385) are presented, as well as for their decay products K0 and Λ. An estimation is given on the K(1430) and ∑ (1915) productions

Test of a quark-diquark fragmentation mechanism in proton-proton interactions at 360 GeV/c

Feynmanx distributions for the inclusive reactions P+P → hadron + anything at 360 GeV/c are analyzed in terms of a quark-diquark fragmentation model. The proton is assumed to be composed either of a quark and a diquark or of three independent quarks. The model tested includes a hadronization part for which we use the Field-Feynman and LUND fragmentation functions. The model with diquarks gives a better description of our experimental data; in particular forP+P → Λ0+anything, the model without diquarks fails to reproduce the data