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Results for “GeV”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Production of charm quarks in a parton cascade model for relativistic heavy ion collisions at s NN = 200 GeV
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Predictions for isobaric collisions at s N N = 200 GeV from a multiphase transport model
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Measurements of production and inelastic cross sections for p + C , p + Be , and p + Al at 60 GeV / c and p + C and p + Be at 120 GeV / c
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Measurements of e + e − → η c π + π − π 0 , η c π + π − , and η c π 0 γ at s from 4.18 to 4.60 GeV, and search for a Z c state close to the D D ¯ threshold decaying to η c π at s = 4.23 GeV
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Cross section measurement of e + e − → π + π − ψ ( 3686 ) from s = 4.0076 GeV to 4.6984 GeV
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Cross section measurement of e + e − → p p ¯ η and e + e − → p p ¯ ω at center-of-mass energies between 3.773 GeV and 4.6 GeV
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Cross-section measurements of e + e − → ϕ K + K − and e + e − → ϕ K S 0 K S 0 at center-of-mass energies between 3.7730 GeV and 4.7008 GeV
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125 GeV Higgs state in the context of four generations with two Higgs doublets
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Inclusive cross sections for pairs of identified light charged hadrons and for single protons in e + e - at s = 10.58 GeV
We report the first double differential cross sections of two charged pions and kaons (e + e - →hhX) in electron-positron annihilation as a function of the fractional energies of the two hadrons for any charge and hadron combination. The dependence of these di-hadron cross sections on the topology (same, opposite-hemisphere or anywhere) is also studied with the help of the event shape variable thrust and its axis. The ratios of these di-hadron cross sections for different charges and hadron combinations directly shed light on the contributing fragmentation functions. For example, we find that the ratio of same-sign pion pairs over opposite-sign pion pairs drops toward higher fractional energies where disfavored fragmentation is expected to be suppressed. These di-hadron results are obtained from a 655fb -1 data sample collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e + e - collider. Extending the previously published single-pion and single-kaon cross sections, single-proton (e + e - →pX) cross sections are extracted from a 159fb -1 data sub-sample.
Observation of e + e − → η h c at center-of-mass energies from 4.085 to 4.600 GeV
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Invariant-mass and fractional-energy dependence of inclusive production of dihadrons in e + e - annihilation at s = 10.58 GeV
The inclusive cross sections for dihadrons of charged pions and kaons ( e + e - → h h X ) in electron-positron annihilation are observed and reported on. They are obtained as a function of the total fractional energy and invariant mass for any di-hadron combination in the same hemisphere as defined by the thrust event-shape variable and its axis. Since same-hemisphere dihadrons can be assumed to originate predominantly from the same initial parton, di-hadron fragmentation functions are probed. Moreove, these di-hadron fragmentation functions are needed as an unpolarized baseline in order to quantitatively understand related spin-dependent measurements in other processes and to apply them to the extraction of quark transversity distribution functions in the nucleon. The di-hadron cross sections are obtained from a 655 fb - 1 data sample collected at or near the Υ ( 4 S ) resonance with the Belle detector at the KEKB asymmetric-energy e + e - collider.
Measurements of total production cross sections for π + + C , π + + Al , K + + C , and K + + Al at 60 GeV / c and π + + C and π + + Al at 31 GeV / c
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Measurement of ϕ -meson production at forward rapidity in p + p collisions at s = 510 GeV and its energy dependence from s = 200 GeV to 7 TeV
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