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Title: Production of K⁺K⁻ pairs in proton-proton collisions below the Φ meson threshold

Abstract

The pp→ppK⁺K⁻ reaction was measured below the Φ threshold at a beam energy of 2.568 GeV using the COSY-ANKE magnetic spectrometer. By assuming that the four-body phase space is distorted only by the product of two-body final-state interactions, fits to a variety of one-dimensional distributions permit the evaluation of differential and total cross sections. The shapes of the distributions in the K p and K pp invariant masses are reproduced only if the K⁻ p interaction is even stronger than that found at higher energy. The cusp effect in the K⁺K⁻ distribution at the K⁰K¯¯¯⁰ threshold is much more clear and some evidence is also found for coupling between the K⁻ p and K¯¯¯⁰n channels. However, the energy dependence of the total cross section cannot be reproduced by considering only a simple product of such pairwise final-state interactions.

Authors:
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Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1102848
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear physics
Additional Journal Information:
Journal Name: Physical Review. C, Nuclear physics Journal Volume: 87 Journal Issue: 6; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Ye, Q. J., Hartmann, M., Chiladze, D., Dymov, S., Dzyuba, A., Gao, H., Gebel, R., Hejny, V., Kacharava, A., Lorentz, B., Mchedlishvili, D., Merzliakov, S., Mielke, M., Mikirtytchiants, S., Ohm, H., Papenbrock, M., Polyanskiy, A., Serdyuk, V., Stein, H. J., Ströher, H., Trusov, S., Valdau, Yu., Wilkin, C., and Wüstner, P. Production of K⁺K⁻ pairs in proton-proton collisions below the Φ meson threshold. United States: N. p., 2013. Web. doi:10.1103/PhysRevC.87.065203.
Ye, Q. J., Hartmann, M., Chiladze, D., Dymov, S., Dzyuba, A., Gao, H., Gebel, R., Hejny, V., Kacharava, A., Lorentz, B., Mchedlishvili, D., Merzliakov, S., Mielke, M., Mikirtytchiants, S., Ohm, H., Papenbrock, M., Polyanskiy, A., Serdyuk, V., Stein, H. J., Ströher, H., Trusov, S., Valdau, Yu., Wilkin, C., & Wüstner, P. Production of K⁺K⁻ pairs in proton-proton collisions below the Φ meson threshold. United States. doi:10.1103/PhysRevC.87.065203.
Ye, Q. J., Hartmann, M., Chiladze, D., Dymov, S., Dzyuba, A., Gao, H., Gebel, R., Hejny, V., Kacharava, A., Lorentz, B., Mchedlishvili, D., Merzliakov, S., Mielke, M., Mikirtytchiants, S., Ohm, H., Papenbrock, M., Polyanskiy, A., Serdyuk, V., Stein, H. J., Ströher, H., Trusov, S., Valdau, Yu., Wilkin, C., and Wüstner, P. Wed . "Production of K⁺K⁻ pairs in proton-proton collisions below the Φ meson threshold". United States. doi:10.1103/PhysRevC.87.065203.
@article{osti_1102848,
title = {Production of K⁺K⁻ pairs in proton-proton collisions below the Φ meson threshold},
author = {Ye, Q. J. and Hartmann, M. and Chiladze, D. and Dymov, S. and Dzyuba, A. and Gao, H. and Gebel, R. and Hejny, V. and Kacharava, A. and Lorentz, B. and Mchedlishvili, D. and Merzliakov, S. and Mielke, M. and Mikirtytchiants, S. and Ohm, H. and Papenbrock, M. and Polyanskiy, A. and Serdyuk, V. and Stein, H. J. and Ströher, H. and Trusov, S. and Valdau, Yu. and Wilkin, C. and Wüstner, P.},
abstractNote = {The pp→ppK⁺K⁻ reaction was measured below the Φ threshold at a beam energy of 2.568 GeV using the COSY-ANKE magnetic spectrometer. By assuming that the four-body phase space is distorted only by the product of two-body final-state interactions, fits to a variety of one-dimensional distributions permit the evaluation of differential and total cross sections. The shapes of the distributions in the Kp and Kpp invariant masses are reproduced only if the K⁻p interaction is even stronger than that found at higher energy. The cusp effect in the K⁺K⁻ distribution at the K⁰K¯¯¯⁰ threshold is much more clear and some evidence is also found for coupling between the K⁻p and K¯¯¯⁰n channels. However, the energy dependence of the total cross section cannot be reproduced by considering only a simple product of such pairwise final-state interactions.},
doi = {10.1103/PhysRevC.87.065203},
journal = {Physical Review. C, Nuclear physics},
number = 6,
volume = 87,
place = {United States},
year = {2013},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevC.87.065203

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Cited by: 12 works
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