ϕ-meson production in pp collisions close to threshold

Hartmann, Michael; Maeda, Yoshikazu; Keshelashvilli, I.; Koch, H.; Mikirtichyants, S.; Barsov, S.; Borgs, W.; Büscher, M.; Hejny, V.; Kleber, V.; Koptev, V.; Kulessa, P.; Mersmann, T.; Mussgiller, A.; Ohm, H.; Pysz, K.; Schleichert, R.; Stein, H. J.; Ströher, H.; Watzlawik, K.-H.; Wüstner, P.

doi:10.1016/j.nuclphysa.2005.03.126

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…The DISTO measurement results in the ratio R φ/ω =(36±16)·10 −3 . The still preliminary ANKE data [25] are consistent with the DISTO result. Thus, the central value of the ratio is indeed a factor of 4 larger than what was found in the other analyses.…”

Section: Resultssupporting

confidence: 86%

“…The pp → ppφ reaction amplitude, |M φ |, as a function of the excess energy ǫ. The square is the result extracted from the DISTO data [24], the stars are those for the preliminary ANKE data [25], while the triangles are from Refs. [23,30].…”

Section: Resultsmentioning

confidence: 99%

“…Here we describe a procedure for the data evaluation that allows for an analysis of any 3-body final state. Following that procedure we extract the ratio R φ/ω from the DISTO results and from preliminary pp→ppφ cross section data reported recently by the ANKE Collaboration [25]. Note that the evaluation of the ratio R φ/ω requires data for pp→ppω as well.…”

Section: Introductionmentioning

confidence: 99%

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Aspects of φ-meson production in proton-proton collisions

2006

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Abstract. We analyze near-threshold cross section data for the reaction pp→ppφ published by the DISTO collaboration and recent, still preliminary results presented by the ANKE Collaboration. We formulate a procedure to evaluate the OZI ratio at low energies by taking into account corrections from the kinematics and the final-state interaction. Combining the new data with the few measurements available at higher energies we give a limit for the OZI rule violation and estimate the possible contribution from a five-quark baryonic resonance coupled to the φp system.

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Aspects of φ-meson production in proton-proton collisions

2006

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Role of theN*(1535)inpp→ppϕa

2008

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The NEAR-THRESHOLD PRODUCTION OF Φ-Mesons IN PROTON–NUCLEON COLLISIONS

Hartmann

Maeda

Keshelashvili

et al. 2007

Int. J. Mod. Phys. A

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The pp → ppϕ and quasi–free pn → dϕ reactions have been studied at the Cooler Synchrotron COSY–Jülich, using the internal beam and the ANKE facility. Total cross sections in the pp entrance channel have been determined at three excess energies ∊ in the range of 18.5–75.9 MeV. In case of the pn entrance channel the energy dependence of the cross section up to 80 MeV has been extracted by exploiting the intrinsic momentum of the neutron inside a deuterium target. Taken together with data for ω–production, a significant enhancement of the ϕ/ω ratio for both entrance channels of a factor 8 is found compared to predictions based on the Okubo–Zweig–Iizuka rule.

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ϕ-meson production in pp collisions close to threshold

Cited by 3 publications

References 18 publications

Aspects of φ-meson production in proton-proton collisions

Aspects of φ-meson production in proton-proton collisions

Role of theN*(1535)inpp→ppϕa

The NEAR-THRESHOLD PRODUCTION OF Φ-Mesons IN PROTON–NUCLEON COLLISIONS

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