Meson + Hyperon Final States in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mi>p</mml:mi></mml:math>Interactions at 4.1 and 5.5 GeV/<i>c</i>

Mott, J.; Ammar, R.; Davis, R.; Kropac, W.; Schweingruber, F.; Derrick, M.; Fields, T.; Hyman, L.; Loken, J.; Simpson, J.

doi:10.1103/physrevlett.18.355

Cited by 26 publications

(2 citation statements)

References 7 publications

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“…Since AA = AC = 0 in this reaction, we must have a E = +1 from (9). Denote the helicities of the 1+ Then parity conservation at the baryon vertex gives (14) With the use of (10) and (11), the parity restrictions on the helicity amplitudes may be written (15 ) In obtaining the sum rule, one writes out the measurable density matrix elements in terms of the independent helicity amplitudes. For simplicity in notation, all amplitudes are normalized by dividing by .…”

Section: The Characteristic Energy Dependence Do/dt 2a(t)-2 S mentioning

confidence: 99%

Production Mechanisms and Relations between Spin Density Matrix Elements

Ringland

Thews

1968

Phys. Rev.

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Section: The Characteristic Energy Dependence Do/dt 2a(t)-2 S mentioning

confidence: 99%

Production Mechanisms and Relations between Spin Density Matrix Elements

Ringland

Thews

1968

Phys. Rev.

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“…Some information is now available. 3 The cross section for Kp production of cp mesons is 56 ± 15 (ib at 5.5 GeV/c. We expect this to vary as l/p 2 as do other AS=1 cross sections.…”

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confidence: 99%

Some Rare Decays in Interactions ofπandKMesons with Carbon and Iron

et al. 1968

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An experiment on the leptonic decay of vector mesons produced by K~-and ir~~-meson bombardment of carbon and iron has previously been reported. 1 ' 2 In this Letter we report some other interesting features of the data, namely, (1) a value for the cp branching ratio;(2) an upper limit for the process ?]-* JLL+JLL~";(3) upper limits for 77-77 0 JU, + JU~ and w-+ ir°ii + i±~; and (4) a comparison of the decays p°-~ JLL + JLL~ and p°-~e + e-. In Ref. 2 we reported a peak containing 12 events in the invariant-mass spectrum of muon pairs produced by K~~ mesons, which we attributed to leptonic decay of cp mesons. Unfortunately, we had, at that time, no information about cp production by K mesons. Some information is now available. 3 The cross section for Kp production of cp mesons is 56 ± 15 (ib at 5.5 GeV/c. We expect this to vary as l/p 2 as do other AS=1 cross sections. We then get 12 jUb for the production cross section of cp mesons. At 12 BeV, a cross section of 7 ±3 jub is found 4 for cp production in four-prong events by Kp interactions in a bubble chamber. Allowing for further events in the same ratio as at low energies, we also find 12 jub. In order to compare this with our cross section 2 of 33 nb for the production of lepton pairs from carbon, we need an optical model calculation. This may be done in the same way as was done for the absorption of p mesons. However, the cpN cross section is expected on the quark model 5 to be 10 jLtb which is smaller than the 30 748 jLib we used for the nucleon cross section. This is confirmed by cp photoproduction data. 6 Therefore, the absorption becomes quite small and we derive a branching ratio r -all 33X10 12~ -3

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Can Pedestrians Understand the New Particles?

Lipkin

1978

Understanding the Fundamental Constituents of Matter

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Meson + Hyperon Final States inK−pInteractions at 4.1 and 5.5 GeV/c

Cited by 26 publications

References 7 publications

Production Mechanisms and Relations between Spin Density Matrix Elements

Production Mechanisms and Relations between Spin Density Matrix Elements

Some Rare Decays in Interactions ofπandKMesons with Carbon and Iron

Can Pedestrians Understand the New Particles?

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