Production of ϱ0 and f in K−p interactions at 10 and 16 GeV/c: Estimation of the central and fragmentation parts of ϱ0 production and comparison with the quark model

Schmitz, P.; Sixel, P.; Kriegel, Uriah; Walter, Michael; Figiel, J.; Morrison, D. R. O.; Saarikko, H.; Schmid, Patrick; Triantis, F. A.; Barnham, K.W.J.; Eason, R.M.; Mandl, F.; Markytan, M.

doi:10.1016/0550-3213(78)90046-9

“…Two-particle densities fall exponentially at high masses and an extrapolation of this exponential down to below the low-mass resonances is generally used for a direct estimate of inclusive resonance production. Figure 2 ( a ) shows the T + T -mass spectrum for K-p + K'?T+T-+ anything and K-p + AT+T-+ anything obtained at 10 and 16 GeV/c by Schmitz et a1 (1978). In both cases, a small shoulder is visible in the or ( p ' ) / ( ~-) ratio of about 15% for meson-proton collisions and 10% for proton-proton collisions.…”

Section: Particle Yieldsmentioning

confidence: 99%

Parton models of low momentum transfer processes

Fialkowski

¹

,

Kittel

²

1983

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In the last five years ample evidence has been found supporting the idea that the quark-parton structure of hadrons is relevant for multiple production in soft hadronic collisions. Starting from the experimental foundations, we compare the most successful models applying this idea. Implications are discussed on special type reactions like diffraction dissociation and collisions on nuclei, and the models are confronted with recent data leading to new insight and modifications. Relative yields of particles in the central region may be understood as reflecting their valence quark structure in the framework of quark combinatorics, and the comparison of the valence structure of initial and final hadrons allows us to understand yields in the fragmentation regions. From the structure functions of initial hadrons and/or the fragmentation functions of (di)quarks into final hadrons as seen in deep inelastic lepton-hadron or e+ecollisions, one can deduce the shape of fragmentation spectra in soft hadronic collisions. However, hadronic collisions also prove a very rich independent source of information on parton structure. Work to be done on the theoretical side is on a solid foundation of the two successful pictures of quark fragmentation and quark recombination as well as on an explanation of their apparent complementarity. On the experimental side, apart from further results from the pp collider, high statistics is needed on hydrogen and on heavier nuclei at Plab > 200 GeV/c in particular from strange beams.

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“…Figure 2 ( a ) shows the T + T -mass spectrum for K-p + K'?T+T-+ anything and K-p + AT+T-+ anything obtained at 10 and 16 GeV/c by Schmitz et a1 (1978). In both cases, a small shoulder is visible in the p and f regions on a large combinatorial background falling like exp ( -k M ) with k = 3 GeV-'.…”

Section: Particle Yieldsmentioning

confidence: 99%

“…At both energies, the cross section for p production I . (Schmitz et al 1978). Top: A, k = 3.4, 0, k = 2.9.…”

Section: Particle Yieldsmentioning

confidence: 99%

“…The y distribution of p o produced from K-p at 16 GeV/c (Schmitz et a1 1978) is compared to that from K p and pp at 24 GeV/c in figure 9(a). Again, the three distributions agree at y 6 0.…”

Section: ' ) / (~+ )mentioning

confidence: 99%

“…( a ) Comparison of the CM rapidity distribution of po in 16 GeV/c K-p interactions (0) with the same in 16 GeV/c a -p (0) and 24 GeV/c pp (x) interactions(Schmitz et al 1978). ( b ) Comparison of the CM rapidity distributions of inclusive K* production in a'p (W) and K-p (0) interactions at 16 GeV/c and in 24 GeV/c pp (V) interactions(Bockmann et a1 1980).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Q-switched neodymium glass laser emitting polarized radiation

Vitrishchak¹,

Sidorenko²,

Soms³

1978

Sov. J. Quantum Electron.

0

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In the last five years ample evidence has been found supporting the idea that the quark-parton structure of hadrons is relevant for multiple production in soft hadronic collisions. Starting from the experimental foundations, we compare the most successful models applying this idea. Implications are discussed on special type reactions like diffraction dissociation and collisions on nuclei, and the models are confronted with recent data leading to new insight and modifications. Relative yields of particles in the central region may be understood as reflecting their valence quark structure in the framework of quark combinatorics, and the comparison of the valence structure of initial and final hadrons allows us to understand yields in the fragmentation regions. From the structure functions of initial hadrons and/or the fragmentation functions of (di)quarks into final hadrons as seen in deep inelastic lepton-hadron or e+ecollisions, one can deduce the shape of fragmentation spectra in soft hadronic collisions. However, hadronic collisions also prove a very rich independent source of information on parton structure. Work to be done on the theoretical side is on a solid foundation of the two successful pictures of quark fragmentation and quark recombination as well as on an explanation of their apparent complementarity. On the experimental side, apart from further results from the pp collider, high statistics is needed on hydrogen and on heavier nuclei at Plab > 200 GeV/c in particular from strange beams.

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Discussion of Vector Meson Production in Kp Interactions in Terms of a Simple Quark Fusion Model

Gensch

¹

,

Kriegel

²

1979

Annalen der Physik

Self Cite

1

0

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Abmtract. The inclusive production of ~"(773), K*(892) and tp(1020) mesons in K f p and K-p interactions a t 32 GeV/c is investigated in terms of a quark fusion model. Except for the ~'(773) production, the model fails to give a unique description of the vector m m n production in both K+ and K-induced reactions. IntroductionThe quark parton model, succeasfully applied to describe lepton induced reactions and large pl phenomena, nowadays is also being tried aa a, tool to interpret the production of hadrons of small pl.Several attempts are presently under discussion: a statistical approach [l], a quark recombination model [2] and a quark fusion model [3-51. The goal of these models -is to link features of the measured hadron spectra to the parton distribution inside the hadrons.In this work we compare data on vector meson production in K-p interactions with the predictions of a quark fusion model [3-51, with the aim of fin%

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Production of ϱ0 and f in K−p interactions at 10 and 16 GeV/c: Estimation of the central and fragmentation parts of ϱ0 production and comparison with the quark model

Cited by 10 publications

References 8 publications

Parton models of low momentum transfer processes

Parton models of low momentum transfer processes

Q-switched neodymium glass laser emitting polarized radiation

Discussion of Vector Meson Production in Kp Interactions in Terms of a Simple Quark Fusion Model

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