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Showing 1 to 20 of 23 for “"charged pions"”.
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Photoproduction of charged pions from deuterium near threshold
"An experiment has been performed in order to improve existing information on the behavior of the pi-photoproduction cross section near threshold. To do this an X=ray beam from the University of Illinois betatron was passed through a 14 inch liquid deuterium bubble chamber. Each X ·-ray pulse (E …
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Analysis of B Meson Decays to Three Charged Pions
… a study of direct CP violation in the decay of charged B to three charged pions.
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Production of Three Charged Pions in Negative Pion Proton Interactions At5 Bev/c
Made available in DSpace on 2015-05-12T21:41:52Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6915407.PDF: 3348853 bytes, checksum: 6d3740f53c0e6d8c4a4899733e01cc70 (MD5) Previous issue date: 1969
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Production of three charged pions in pi minus proton interactions at 5 Bev/c
… this experiment, the interactions producing four charged particles in the final states have been measured and the reaction pi-p -> ppi+pi-pi- has been studied, with the emphasis placed on the three pions system. The cross section for this reaction was found to be 1.80±0.45 mba For the final …
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Exclusive photoproduction of charged pions in hydrogen and deuterium from 1 to 6 GeV
The study of the transition region in the description of exclusive processes and hadron structure, from the nucleon-meson degrees of freedom in meson-exchange models at low energy to the quark-gluon degrees of freedom in pQCD at high energy, is essential for us to understand the strong interaction. …
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Search for the Decay of the Short-Lived Neutral Kaon Into Two Charged Pions and One Neutral Pion
Made available in DSpace on 2015-05-12T22:38:41Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7121148.PDF: 3725577 bytes, checksum: 3857ec61c245b1de7ae99730d18b6903 (MD5) Previous issue date: 1971
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Observation of quasi two-body production in pion plus proton goes to neutron plus four charged pions at 8 geV/c
This thesis reports the first observation of quasi 2-body production in the backward reaction pi- P -> npi+pi+pi-pi-. Data were obtained using an 8 GeV/a pion beam incident on a liquid hydrogen target inside the University of Illinois/Argonne National Laboratory streamer chamber. The chamber was …
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Two body rapidity correlations in pi-p interactions at 147 GeV/c
… may be taken as evidence of fairly massive charged bodies decaying into three charged pions, or doubly charged clusters decaying into two charged pions."
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THE PION DOUBLE DIFFERENTIAL CHARGE EXCHANGE CROSS SECTION IN PROTODUNE-SP
… are more complicated and produce more charged pions with sizable effects from final state interactions as they traverse the nucleus. The final state interactions, especially of charged pions, can lead to mis-identification of neutrino flavor and biases in the neutrino energy …
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Rho-Meson propagator at two-loop order in the Kroll-Lee-Zumino quantum field theory
… Abelian renormalizable quantum field theory of charged pions and a neutral ρ meson, provides a framework to compute corrections to the tree-level Vector-Meson-Dominance model. Despite a large ρππ coupling (gρππ ≈ 5), the loop suppresion factor of 1=(4π)² helps give reasonably small NLO …
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Double helicity asymmetry for charged pion + jet production in p+p collisions at [square root of] s=200 GeV at STAR
… to the x dependence of [Delta]g. By measuring charged pions opposite a jet, this particular measurement can be sensitive to the flavor of the struck parton. This measurement, which is dominated by the quark-gluon subprocess, can be divided into terms proportional to [Delta]u[Delta]g and …
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Two-loop corrections to the rho-propagator in the Kroll-Lee-Zumino theory
… is a renormalizable quantum field theory of charged pions and neutral rho-mesons. It provides the quantum field theory platform for the vector meson dominance model, allowing for a systematic computation of quantum corrections in perturbation theory (the ρ-π-π coupling is small enough for …
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Charge Symmetry Violation Quark Distributions via Precise Measurement of π+/π− Ratios in Semi-inclusive Deep Inelastic Scattering
… measurements of the cross section ratio of charged pion production in semi-inclusive deep inelastic scattering (SIDIS) from deuterium. Such measurements were proposed and carried in experiment E12-09-002 at Jefferson Lab. The experiment was conducted in Hall C from fall 2018 to spring 2019 …
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Photoproduction of ηc mesons in ultra-peripheral Pb+Pb collisions at √sNN= 5.02 TeV at the LHC
… All of the ηc decay channels containing only charged pions and kaons in the final state were analyzed. After background subtraction, a total of 28.3 ± 13.0 ± 7.5 ηc candidates, and 25.3 ± 6.8 ± 0.81 J/ψ candidates were observed. The first uncertainty is statistical and the second uncertainty …
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Measurement of the Ratio of Charged and Neutral 𝐵 Mesons in Υ (4𝑆) Events via Partial Reconstruction of the Semileptonic Decays 𝛣̅⁰⟶𝐷<sup>∗</sup>⁺ℓ⁻<sub>𝜈̅ℓ</sub> and 𝛣̅⁻⟶𝐷<sup>∗</sup>⁰ℓ<sub>𝜈̅ℓ</sub>
… relative efficiency for detecting neutral and charged pions. This ratio is equivalent to the ratio of the product of production fraction and lifetime for charged and neutral B mesons, <img width=31 height=29 align=center …
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Measurement of the analyzing power in inclusive, high-x(F) charged pion production with a 200 GeV/c polarized proton beam
… gluon exchange is the dominant interaction. The charged pions were identified and tracked with a large forward multi-particle spectrometer based upon a Helium gas threshold Cherenkov counter. A simple parton recombination model correctly predicts the signs of the spin parameters measured in this …
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On Extracting Hadron Multiplicities and Unpolarized Nucleon Structure Ratios From SIDIS Data at the HERMES Experiment
… scattering events is extracted for identified charged pions, kaons and protons from two different gaseous targets (H & D). For the hydrogen (deuterium) target 12.5 (16.68) million events were recorded. Using these hadron multiplicities an attempt is made to extract unpolarized information about …
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Photoproduction of p0 Mesons in Ultra-Peripheral D-AU Collisions at RHIC
… Sometimes these oppositely directed beams of charged nuclei (ions) interact head-on resulting in a central collision. But often these nuclei narrowly miss each other and interact through electromagnetic fields. This phenomenon, known as an ultra-peripheral collision, is of particular interest …
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Resolution Studies for the Micro Vertex Detector of the PANDA Experiment and the Reconstruction of Charmed Mesons for Specific Hadronic Channels
… for the channels antiproton-proton into two charged pions and into J/psi and photon. The expected hadronic background for physics observables requires a high selection power of the experimental setup, especially for the investigation of the charmonium system above the DD(bar) threshold. For …
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Photon asymmetry of the g p -> pi+ n reaction in the region of the D(1232) resonance
… the first use of the CB for the detection of charged pions. This has applications for future experiments at MAMI involving the measurement of polarisation observables relying on charged-meson final states. The output of the newly upgraded GEANT-4 simulation of the apparatus setup in A2 was …
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