Consequences of strangeness content in the nucleon for φ - meson production in NN̄ annihilation

Gutsche, Thomas; Faessler, Amand; Yen, G.D.; Yang, Shin Nan

doi:10.1016/s0920-5632(97)00293-4

Cited by 12 publications

(11 citation statements)

References 9 publications

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“…It seems that approaches based on traditional ideas [13,14,58] are unable to reproduce all the features of φ production and related phenomena observed so far. On the other hand, the polarized intrinsic-strangeness model [15] not only provides a transparent physical explanation of the spin effects observed in the production of φ f ′ 2 (1525) η and K * mesons, as well as Λ baryons, but predicts some definite tests.…”

Section: Other Approachesmentioning

confidence: 97%

“…An attempt to calculate the φ yields in pp annihilation at rest in a nonrelativistic quark model with a ss admixture in the nucleon wave function was made in [58]. There it was assumed that the φ is produced by shake-out of the nucleon ss component, which implied that the quantum numbers of the ss pair in the nucleon had to be J P C = 1 −− , as opposed to our 3 P 0 proposal.…”

Section: Other Approachesmentioning

confidence: 99%

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Hadronic probes of the polarized intrinsic strangeness of the nucleon

et al. 2000

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We have previously interpreted the various large apparent violations of the naïve Okubo-Zweig-Iizuka (OZI) rule found in many channels inpp annihilation at LEAR as evidence for an intrinsic polarized ss component of the nucleon wave function. The model is further supported by new data from LEAR and elsewhere. Here we discuss in more detail the possible form of thess component of the nucleon wave function, interpret the new data and clarify the relative roles of strangeness shake-out and rearrangement, discuss whether alternative interpretations are still allowed by the new data, and propose more tests of the model.

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Section: Other Approachesmentioning

confidence: 97%

Section: Other Approachesmentioning

confidence: 99%

Hadronic probes of the polarized intrinsic strangeness of the nucleon

et al. 2000

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“…The investigation of φ-meson production in both hadronic [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] and electromagnetic [16,17] processes at low and intermediate energies has attracted much attention in recent years. A major motivation for those studies is the hope that one can obtain information about the amount of hidden strangeness in the nucleon.…”

Section: Introductionmentioning

confidence: 99%

φ-meson production in proton-proton collisions

et al. 1999

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The production of φ-mesons in proton-proton collisions is investigated within a relativistic meson-exchange model of hadronic interactions. The experimental prerequisites for extracting the N N φ coupling strength from this reaction are discussed. In the absence of a sufficient set of data, which would enable an accurate determination of the N N φ coupling strength, we perform a combined analysis, based on some reasonable assumptions, of the existing data for both ω-and φ-meson production. We find that the recent data from the DISTO collaboration on the angular distribution of the φ meson indicate that the N N φ coupling constant is small. The analysis yields values for g N N φ that are compatible with the OZI rule.

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“…Recent experiments on vector meson production through pp annihilation at rest [17][18][19] report a strong violation of the OZI rule. It can be accounted for by the presence of an intrinsic ss component in the nucleon wave function [8,20], which contributes to the process through the rearrangement and shake-out diagrams [21][22][23][24]. On the other hand, it was also claimed that this OZI violation could be explained through modified meson exchange models [25,26] without any strangeness content of the nucleon.…”

Section: Introductionmentioning

confidence: 99%

Photoproduction ofφmesons from the proton: Polarization observables and strangeness in the nucleon

Титов¹,

Yang

et al. 1998

Phys. Rev. C

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The polarization observables in φ meson photoproduction is studied to probe the strangeness content of the nucleon. In addition to the dominant diffractive production and the one-pion-exchange process, we take into account the direct knockout mechanism that arises from the possible hidden strangeness content of the nucleon. We find that some double polarization observables are very sensitive to the strangeness content of the proton because of the different spin structures of the amplitudes associated with different mechanisms. This suggests that such measurements could be very useful in probing the strangeness content in the proton. The orbitally excited quark-cluster configurations in the proton are included in the calculation and found to have little effect. PACS number(s): 13.88.+e, 24.70.+s, 25.20.Lj, 13.60.Le

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Consequences of strangeness content in the nucleon for φ - meson production in NN̄ annihilation

Cited by 12 publications

References 9 publications

Hadronic probes of the polarized intrinsic strangeness of the nucleon

Hadronic probes of the polarized intrinsic strangeness of the nucleon

φ-meson production in proton-proton collisions

Photoproduction ofφmesons from the proton: Polarization observables and strangeness in the nucleon

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