a0+(980)-resonance production in the reaction pp -> dpi+eta close to the K(bar(K)) threshold

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dc.creatorFedorets, P.
dc.creatorBuescher, M.
dc.creatorChernyshev, V. P.
dc.creatorDymov, S.
dc.creatorGrishina, V. Yu.
dc.creatorHanhart, C.
dc.creatorHartmann, M.
dc.creatorHejny, V.
dc.creatorKleber, V.
dc.creatorKoch, H. R.
dc.creatorKondratyuk, L. A.
dc.creatorKoptev, V.
dc.creatorKudryavtsev, A. E.
dc.creatorKulessa, P.
dc.creatorMerzliakov, S.
dc.creatorMikirtychiants, S.
dc.creatorNekipelov, M.
dc.creatorOhm, H.
dc.creatorSchleichert, R.
dc.creatorStroeher, H.
dc.creatorTarasov, V. E.
dc.creatorWatzlawik, K. -H.
dc.creatorZychor, I.
dc.date2005-01-28
dc.date.accessioned2026-07-07T11:44:17Z
dc.date.available2026-07-07T11:44:17Z
dc.descriptionThe reaction pp -> dpi+eta has been measured at a beam energy of T=2.65 GeV (p=3.46 GeV/c) using the ANKE spectrometer at COSY-Juelich. The missing mass distribution of the detected dpi+ pairs exhibits a peak around the eta mass on top of a strong background of multi-pion pp -> dpi+(n(pi)) events. The differential cross section d^4(sigma)/d(Omega_d)d(Omega_pi+)d(p_d)d(p_pi+) for the reaction pp -> dpi+eta has been determined model independently for two regions of phase space. Employing a dynamical model for the a0+ production allows one then to deduce a total cross section of sigma(pp -> da0+ -> dpi+eta)=(1.1 +/- 0.3_(stat) +/- 0.7_(syst)) microbarn for the production of pi+eta via the scalar a0+(980) resonance and sigma(pp -> dpi+eta) = (3.5 +/- 0.3_(stat) +/- 1.0_(syst)) microbarn for the non-resonant production. Using the same model as for the interpretation of recent results from ANKE for the reaction pp -> dK+(bar(K0)), the ratio of the total cross sections is sigma(pp -> d(K+(bar(K0)))_(L=0))/sigma(pp -> da0+ -> dpi+eta) = 0.029 +/- 0.008_(stat) +/- 0.009_(syst), which is in agreement with branching ratios in the literature.
dc.description5 pages, 8 figures, 1 table
dc.identifierhttps://arxiv.org/abs/nucl-ex/0501027
dc.identifierhttp://arxiv.org/abs/nucl-ex/0501027
dc.identifierPhys.Atom.Nucl.69:306-313,2006
dc.identifierdoi:10.1134/S1063778806020153
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201547
dc.subjectNuclear Experiment
dc.subjectHigh Energy Physics - Phenomenology
dc.titlea0+(980)-resonance production in the reaction pp -> dpi+eta close to the K(bar(K)) threshold
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