Explore the vast range of titles available.

A partial wave analysis of antiproton-proton annihilation data in flight at 900 [Formula omitted] into [Formula omitted], [Formula omitted] and [Formula omitted] is presented. The data were taken at LEAR by the Crystal Barrel experiment in 1996. The three channels have been coupled together with [Formula omitted]-scattering isospin I = 0 S- and D-wave as well as I = 1 P-wave data utilizing the K-matrix approach. Analyticity is treated using Chew-Mandelstam functions. In the fit all ingredients of the K-matrix, including resonance masses and widths, were treated as free parameters. In spite of the large number of parameters, the fit results are in the ballpark of the values published by the Particle Data Group. In the channel [Formula omitted] a significant contribution of the spin exotic [Formula omitted] [Formula omitted] [Formula omitted]-wave with a coupling to [Formula omitted] is observed. Furthermore the contributions of [Formula omitted] and [Formula omitted] in the channel [Formula omitted] have been studied in detail. The differential production cross section for the two reactions and the spin-density-matrix elements for the [Formula omitted] and [Formula omitted] have been extracted. No spin-alignment is observed for both vector mesons. The spin density matrix elements have been also determined for the spin exotic wave.

A partial wave analysis of antiproton–proton annihilation data in flight at 900 MeV/c into π0π0η, π0ηη and K+K-π0 is presented. The data were taken at LEAR by the Crystal Barrel experiment in 1996. The three channels have been coupled together with ππ-scattering isospin I = 0 S- and D-wave as well as I = 1 P-wave data utilizing the K-matrix approach. Analyticity is treated using Chew–Mandelstam functions. In the fit all ingredients of the K-matrix, including resonance masses and widths, were treated as free parameters. In spite of the large number of parameters, the fit results are in the ballpark of the values published by the Particle Data Group. In the channel π0π0η a significant contribution of the spin exotic IG=1-JPC=1-+π1-wave with a coupling to π0η is observed. Furthermore the contributions of ϕ(1020)π0 and K∗(892)±K∓ in the channel K+K-π0 have been studied in detail. The differential production cross section for the two reactions and the spin-density-matrix elements for the ϕ(1020) and K∗(892)± have been extracted. No spin-alignment is observed for both vector mesons. The spin density matrix elements have been also determined for the spin exotic wave.

A partial wave analysis of antiproton–proton annihilation data in flight at 900$$\\mathrm {MeV/}c$$MeV / c into$${\\pi ^0\\pi ^0\\eta }$$π 0 π 0 η ,$${\\pi ^0\\eta \\eta }$$π 0 η η and$${K^+K^-\\pi ^0}$$K + K - π 0 is presented. The data were taken at LEAR by the Crystal Barrel experiment in 1996. The three channels have been coupled together with$$\\pi \\pi $$π π -scattering isospin I = 0 S- and D-wave as well as I = 1 P-wave data utilizing the K-matrix approach. Analyticity is treated using Chew–Mandelstam functions. In the fit all ingredients of the K-matrix, including resonance masses and widths, were treated as free parameters. In spite of the large number of parameters, the fit results are in the ballpark of the values published by the Particle Data Group. In the channel$${\\pi ^0\\pi ^0\\eta }$$π 0 π 0 η a significant contribution of the spin exotic$$I^G=1^-$$I G = 1 -$$J^{PC}=1^{-+}$$J PC = 1 - +$$\\pi _1$$π 1 -wave with a coupling to$$\\pi ^0 \\eta $$π 0 η is observed. Furthermore the contributions of$$\\phi (1020) \\pi ^0$$ϕ ( 1020 ) π 0 and$$K^*(892)^\\pm K^\\mp $$K ∗ ( 892 ) ± K ∓ in the channel$${K^+K^-\\pi ^0}$$K + K - π 0 have been studied in detail. The differential production cross section for the two reactions and the spin-density-matrix elements for the$$\\phi (1020)$$ϕ ( 1020 ) and$$K^*(892)^\\pm $$K ∗ ( 892 ) ± have been extracted. No spin-alignment is observed for both vector mesons. The spin density matrix elements have been also determined for the spin exotic wave.

A partial wave analysis of antiproton–proton annihilation data in flight at 900 MeV / c into π 0 π 0 η , π 0 η η and K + K - π 0 is presented. The data were taken at LEAR by the Crystal Barrel experiment in 1996. The three channels have been coupled together with π π -scattering isospin I = 0 S- and D-wave as well as I = 1 P-wave data utilizing the K-matrix approach. Analyticity is treated using Chew–Mandelstam functions. In the fit all ingredients of the K-matrix, including resonance masses and widths, were treated as free parameters. In spite of the large number of parameters, the fit results are in the ballpark of the values published by the Particle Data Group. In the channel π 0 π 0 η a significant contribution of the spin exotic I G = 1 - J PC = 1 - + π 1 -wave with a coupling to π 0 η is observed. Furthermore the contributions of ϕ ( 1020 ) π 0 and K ∗ ( 892 ) ± K ∓ in the channel K + K - π 0 have been studied in detail. The differential production cross section for the two reactions and the spin-density-matrix elements for the ϕ ( 1020 ) and K ∗ ( 892 ) ± have been extracted. No spin-alignment is observed for both vector mesons. The spin density matrix elements have been also determined for the spin exotic wave.

Abstract A partial wave analysis of antiproton–proton annihilation data in flight at 900\\mathrm MeV/cMeV/c intoπ ⁰π ⁰η π0π0η ,π ⁰η η π0ηη andK⁺K⁻π ⁰K+K-π0 is presented. The data were taken at LEAR by the Crystal Barrel experiment in 1996. The three channels have been coupled together withπ π ππ -scattering isospin I = 0 S- and D-wave as well as I = 1 P-wave data utilizing the K-matrix approach. Analyticity is treated using Chew–Mandelstam functions. In the fit all ingredients of the K-matrix, including resonance masses and widths, were treated as free parameters. In spite of the large number of parameters, the fit results are in the ballpark of the values published by the Particle Data Group. In the channelπ ⁰π ⁰η π0π0η a significant contribution of the spin exoticIᴳ=1⁻IG=1-J^(PC)=1⁻⁺JPC=1-+π ₁π1 -wave with a coupling toπ ⁰ η π0η is observed. Furthermore the contributions ofφ (1020) π ⁰ϕ(1020)π0 andK^(*)(892)^(±) K^(∓) K∗(892)±K∓ in the channelK⁺K⁻π ⁰K+K-π0 have been studied in detail. The differential production cross section for the two reactions and the spin-density-matrix elements for theφ (1020)ϕ(1020) andK^(*)(892)^(±) K∗(892)± have been extracted. No spin-alignment is observed for both vector mesons. The spin density matrix elements have been also determined for the spin exotic wave.

(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).Large samples of Lambda , capital sigma (1385) and Xi (1321) hyperons produced in the deep-inelastic muon scattering off a super(6)LiD target were collected with the COMPASS experimental setup at CERN. The relative yields of capital sigma (1385) super(+), capital sigma (1385) super(-), ..., ..., Xi (1321) super(-), and ... hyperons decaying into ... were measured. The ratios of heavy-hyperon to Lambda and heavy-antihyperon to ... were found to be in the range 3.8 % to 5.6 % with a relative uncertainty of about 10 %. They were used to tune the parameters relevant for strange particle production of the LEPTO Monte Carlo generator.

Data are presented on the reaction pbar-p -> omega-omega-pizero at rest from the Crystal Barrel detector. These data identify a strong signal due to f2(1565) -> omega-omega. The relative production from initial pbar-p states 3P2, 3P1 and 1S0 is well determined from omega-omega decay angular correlations; P-state annihilation dominates strongly. A combined fit is made with data on pbar-p -> 3pizero at rest, where f2(1565) -> pizero-pizero is observed.

Sedentary, group-living taxa, such as bivalves, respond to waterborne predator cues by enhancing tissues that increase anti-predation attributes such as muscle and shell mass. The ability of bivalves to differentiate among cues generated by the consumption of different prey species that vary in phylogenetic relatedness is unknown. We exposed mussels to cues generated by crabs feeding on mussels, cockles and periwinkles to test whether there was a relationship between the magnitude of the induced response and the level of relatedness to the cue source. Mussels exposed to either effluents of unfed crabs or seawater only served as controls. Exposure to cues from conspecifics and cockles caused significantly reduced growth in shell size of mussels compared to control mussels. Shell growth of mussels exposed to cues from crabs feeding on periwinkles did not differ significantly from mussels exposed to effluents from unfed crabs only. Tissue dry weight increased least in mussels exposed to cues of crabs fed conspecifics, followed by mussels exposed to crabs fed cockles. Cues of crabs that were fed mussels caused increased byssus thread production, whereas the other treatments did not. Exposure to cues from crabs fed mussels and crabs fed cockles resulted in significantly thicker and heavier shells compared to unexposed control mussels. The results of this study indicate that alarm cues of progressively more closely related molluscs cause a higher degree of induced morphological anti-predator responses in mussels. The physiological and behavioural responses of mussels to these cues may therefore have a phylogenetic basis.