Search results for "production [threshold]"

showing 10 items of 250 documents

On Line Tool Life Prediction for Tool Replacement Strategy in FMS Workstation

1993

In FMS environment a large variety of tools are shared resources being employed to process different part type varying the cutting parameters during their useful life. The paper suggests a new methodology to predict the tool life on line using the information deriving from the control station of the production system to gain information about the tool wear.

Part typeWorkstationlawComputer scienceProcess (engineering)Control (management)Tool wearLine (text file)Manufacturing engineeringlaw.inventionVariety (cybernetics)Reliability engineeringProduction system
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Measurement of inclusive K*(0)(892), phi(1020) and K-2*(0)(1430) production in hadronic Z decays

1996

The inclusive production of the neutral vector mesons K-*0(892) and phi(1020), and of the tensor meson K-2(*0)(1430), in hadronic decays of the Z has been mea sured by the DELPHI detector at LEP. The average production rates per hadronic Z decay have been determined to be 0.77 +/- 0.08 K-2(*0)(892), 0.104 +/- 0.008 phi(1020) and 0.079 +/- 0.040 K-2(*0)(1430). The ratio of the tensor-to-vector meson production yields, [K-2(*0)(1430)]/[K-*0(892)] = 0.10 +/- 0.05, is smaller than the [f(2)(1270)]/[rho(0)(770)] and [f'(2)(1525)]/[phi(1020)] ratios measured by DELPHI. The production rates and differential cross sections are compared with the predictions of JETSET 7.4 tuned to the DELPHI data and…

Particle physicsMeson productionPhysics and Astronomy (miscellaneous)MesonElectron–positron annihilationHadronVECTORproduction rate01 natural sciencesPartícules (Física nuclear)DELPHI; neutral vector meson; tensor meson; production rateNuclear physics0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]MESON; VECTOR; GEV/Cneutral vector mesonTensorNeutral vector010306 general physicsDetectors de radiacióDELPHIPhysics010308 nuclear & particles physicstensor mesonGEV/CMass spectrumProduction (computer science)MESON
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Search for theX(4140)state inB+→J/ψϕK+decays

2012

We investigate the decay B+ -> J/psi phi K+ in a search for the X(4140) state, a narrow threshold resonance in the J/psi phi system. The data sample corresponds to an integrated luminosity of 10.4 fb(-1) of p (p) over bar collisions at root s = 1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider. We observe a mass peak with a statistical significance of 3.1 standard deviations and measure its invariant mass to be M = 4159.0 +/- 4.3(stat) +/- 6.6(syst) MeV and its width to be Gamma = 19.9 +/- 12.6(stat)(-8.0)(+3.0)(syst) MeV.

Particle physicsNuclear and High Energy PhysicsTevatronAnalytical chemistryAstrophysics::Cosmology and Extragalactic Astrophysics7. Clean energy01 natural scienceslaw.inventionNuclear physicslaw0103 physical sciencesInvariant massB mesonFermilabNuclear ExperimentCollider010306 general physicsPhysicsLuminosity (scattering theory)Branching fraction010308 nuclear & particles physicsResonanceState (functional analysis)D0 experimentPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentAtomic physicsProduction ratePhysical Review D
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Measurement of the p(e,e′π+)n reaction close to threshold and at low Q2

2017

The cross section of the $p(e,e'\pi^+)n$ reaction has been measured for five kinematic settings at an invariant mass of $W = 1094$ MeV and for a four-momentum transfer of $Q^2 = 0.078$ (GeV/$c$)$^2$. The measurement has been performed at MAMI using a new short-orbit spectrometer (SOS) of the A1 collaboration, intended for detection of low-energy pions. The transverse and longitudinal cross section terms were separated using the Rosenbluth method and the transverse-longitudinal interference term has been determined from the left-right asymmetry. The experimental cross section terms are compared with the calculations of three models: DMT2001, MAID2007 and $\chi$MAID. The results show that we …

Particle physicsNuclear and High Energy Physicsmedia_common.quotation_subjectKinematicsInterference (wave propagation)01 natural sciencesAsymmetryNuclear physicsCross section (physics)Low-energy pionsPion0103 physical sciencesInvariant mass010306 general physicsNuclear ExperimentNuclear Experimentmedia_commonPhysicsSpectrometer010308 nuclear & particles physicslcsh:QC1-999NATURAL SCIENCES. Physics.PRIRODNE ZNANOSTI. Fizika.Electroproduction experimentsTransverse planeShort-orbit spectrometer ; Low-energy pions ; Electroproduction experimentsShort-orbit spectrometerlcsh:Physics
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Comportamento agronomico di quattro nuovi portinnesti ibridi pesco x mandorlo in un impianto ad alta densità in Sicilia

2009

The present study was aimed to evaluate the agronomic behavior of different rootstocks, recently licensed by the Dipartimento di Coltura e Difesa delle Specie Legnose of the University of Pisa, and tested in a high density planting system (2220 trees/ha). Trials were carried out in an experimental orchard established by the Dipartimento di Colture Arboree of the University of Palermo and located in Sicily (Sciacca – Agrigento – 150 m a.s.l.). The observations were carried out on clonal rootstocks: I.S. 5/8 (Polluce); I.S. 5/19 (Castore); I.S. 5/23; I.S. 5/29 and GF 677 grafted at dormant bud with the low chill requirement cultivar “Tropic Snow”. The orchard was established in 2004, trees we…

Peach x almond hybridPrunus persicaSettore AGR/03 - Arboricoltura Generale E Coltivazioni ArboreeFruit qualitypeach rootstock Prunus dulcis x P. persica hybrids production efficiency high density planting system quality fruitRootstock breedingHigh density plantingsYield efficiencyRootstock breeding; High density plantings; Peach x almond hybrid; Yield efficiency; Fruit quality; Prunus persica
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Direct production of χc1 at BESIII

2019

The production of resonances in electron-positron annihilation has only been observed for states with quantum numbers JPC = 1−−, while C = +1 resonances appear only among the decay products. The direct production of the 1++ states could happen through two-photon or neutral current. Due to the smallness of the production rate, this process has never been verified experimentally. With the high luminosity and good performance of the BESIII experiment, a search of the direct production of the 1++ state in charmonium region, χc1, is undergoing with dedicated data samples around the χc1 mass. An overview of the data analysis will be presented.

PhysicsAnnihilationNeutral current010308 nuclear & particles physicsPhysicsQC1-999Quantum number01 natural sciencesLuminosityNuclear physicsDirect production0103 physical sciencesHigh Energy Physics::Experiment010306 general physicsProduction rateEPJ Web of Conferences
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Observation and Properties of the Orbitally ExcitedBs2*Meson

2008

We report the direct observation of the excited L=1 state B_{s2}* in fully reconstructed decays to B+K-. The mass of the B_{s2}* meson is measured to be {5839.6 +- 1.1 (stat.) +- 0.7 (syst.) MeV/c^2, and its production rate relative to the B+ meson is measured to be [1.15 +- 0.23 (stat.) +- 0.13 (syst.)] %.

PhysicsMeson010308 nuclear & particles physicsDirect observationFOS: Physical sciencesGeneral Physics and Astronomy01 natural sciencesHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)Particle decayExcited state0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]High Energy Physics::ExperimentMolecular orbitalAtomic physicsNuclear Experiment010306 general physicsProduction ratePhysical Review Letters
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Deuteron and anti-deuteron production in e+e− collisions at the Z resonance

2006

Deuteron and anti-deuteron production in Z decays has been observed in the ALEPH experiment at LEP. The production rate of anti-deuterons is measured to be 5.9+-1.8+-0.5 10^-6 per hadronic Z decay in the anti-deuteron momentum range 0.62 to 1.03 GeV/c. The coalescence parameter B_2, which characterizes the likelihood of anti-deuteron production, is measured to be 0.0033+-0.0013 GeV^2 in Z dedays. These measurements indicate that the production of anti-deuterons is suppressed in e+e- collisions compared to pp and photoproduction collisions.

PhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsElectron–positron annihilationHadron01 natural sciences7. Clean energyNuclear physicsDeuterium0103 physical sciences010306 general physicsALEPH experimentProduction ratePhysics Letters B
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MEASUREMENT OF THE PRODUCTION-RATES OF ETA AND ETA' IN HADRONIC-Z DECAYS

1992

The decays eta --> gammagamma and eta' --> etapi+pi- have been observed in hadronic decays of the Z produced at LEP. The fragmentation functions of both the eta and eta' have been measured. The measured multiplicities for x > 0.1 are 0.298 +/- 0.023 +/- 0.021 and 0.068 +/- 0.018 +/- 0.016 for eta and eta' respectively. While the fragmentation function for the eta is fairly well described by the JETSET Monte Carlo, it is found that the production rate of the eta' is a factor of four less than the corresponding prediction.

PhysicsNuclear and High Energy PhysicsParticle physicsE+E ANNIHILATIONElectron–positron annihilationMonte Carlo methodHadronLEPNuclear physicsFragmentation (mass spectrometry)Fragmentation functionHigh Energy Physics::ExperimentAstrophysics::Earth and Planetary AstrophysicsNuclear ExperimentParticle Physics - ExperimentProduction rate
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Production of Ds** mesons in hadronic Z decays

2002

The production rates of the orbitally excited Ds** mesons, Ds1 and Ds2*, are measured with the 4.1 million hadronic Z decays recorded by the ALEPH detector during 1991--1995. The Ds** mesons are reconstructed in the decay modes Ds1+ -> D*+ K0, Ds1+ -> D*0 K+ and Ds2*+ -> D0 K+. The production rate of the Ds1 is measured to be n(Z->Ds1+-)=(0.52+-0.09+-0.06)%, under the assumption that the two considered decay modes of the Ds1 saturate the branching ratio. The production rate of the Ds2* is determined to be n(Z->Ds2*+-)=(0.83+-0.29+0.07-0.13)%, assuming that the branching fraction of the decay Ds2*+ -> D0 K+ is 45%. The production rates in Z->cc and Z->bbar decays are …

PhysicsNuclear and High Energy PhysicsParticle physicsMeson010308 nuclear & particles physicsBranching fractionElectron–positron annihilationHadronFOS: Physical sciences01 natural sciencesHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)Excited state0103 physical sciencesProduction (computer science)010306 general physicsProduction rate
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