This title appears in the Scientific Report :
2006
Please use the identifier:
http://hdl.handle.net/2128/10637 in citations.
Please use the identifier: http://dx.doi.org/10.1134/S1063778806020153 in citations.
a0+(980)-resonance production in the reaction pp -> dpi+eta close to the K(bar(K)) threshold
a0+(980)-resonance production in the reaction pp -> dpi+eta close to the K(bar(K)) threshold
The reaction pp --> d pi(+) eta has been measured at a beam energry of T-p = 2.65 GeV (p(p) = 3.46 GeV/c) using the ANKE spectrometer at COSY-Julich. The missing-mass distribution of the detected d pi(+) pairs exhibits a peak around the eta mass on top of a strong background of multipion pp -->...
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Personal Name(s): | Fedorets, P. |
---|---|
Büscher, M. / Chernyshev, V. P. / Dymov, S. / Grishina, V. Yu. / Hanhart, C. / Hartmann, M. / Hejny, V. / Kleber, V. / Koch, H. R. / Kondratyuk, L. A. / Koptev, V. / Kudryavtsev, A. E. / Kulessa, P. / Merzliakov, S. / Mikirtychiants, S. / Nekipelov, M. / Ohm, H. / Schleichert, R. / Ströher, H. / Tarasov, V. E. / Watzlawik, K.-H. / Zychor, I. | |
Contributing Institute: |
Institut 2 (Experimentelle Kernphysik II); IKP-E-2 Jülich-Aachen Research Alliance - Simulation Sciences; JARA-SIM |
Published in: | Physics of atomic nuclei, 69 (2006) S. 306 - 313 |
Imprint: |
New York, NY
AIP
2006
|
Physical Description: |
306 - 313 |
DOI: |
10.1134/S1063778806020153 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
Physics of Atomic Nuclei
69 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1134/S1063778806020153 in citations.
The reaction pp --> d pi(+) eta has been measured at a beam energry of T-p = 2.65 GeV (p(p) = 3.46 GeV/c) using the ANKE spectrometer at COSY-Julich. The missing-mass distribution of the detected d pi(+) pairs exhibits a peak around the eta mass on top of a strong background of multipion pp --> d pi(+) (n pi) events. The differential cross section d(4) sigma/d Omega(d)d Omega(pi+)dp(d)dp(pi+) for the reaction pp --> d pi(+)eta has been determined model independently for two regions of phase space. Employing a dynamical model for the a(0)(+) production allows one then to deduce a total cross section of sigma(pp; --> da(0)(+) --> d pi(+) eta) = 1.1 +/- 0.3(stat) +/- 0.7(syst) mu b for the production of pi(+)eta via the scalar a(0)(+)(980) resonance and sigma(pp --> d pi(+)eta) = 3.5 +/- 0.3(stat) +/- 1.0(syst) mu b for the nonresonant production. Using the same model as for the interpretation of recent results from ANKE for the reaction pp --> dK(+)(K) over bar (0), the ratio of the total cross sections is sigma(pp --> d(K+(K) over bar (0))(L=0))/sigma(pp --> da(0)(+) --> d pi(+)eta) = 0.029 +/- 0.008(stat) +/- 0.009(syst), which is in agreement with branching ratios in the literature. |