000030021 001__ 30021
000030021 005__ 20140130020608.0
000030021 037__ $$9arXiv$$aarXiv:0910.0995$$cnucl-ex
000030021 035__ $$9arXiv$$zoai:arXiv.org:0910.0995
000030021 035__ $$9DESY$$zD10-01515
000030021 035__ $$9SPIRESTeX$$zKren:2009hr
000030021 100__ $$aKren, F.
000030021 245__ $$aExclusive Measurements of pp ---> dpi+ pi0: Double-Pionic Fusion without ABC Effect
000030021 246__ $$9arXiv$$aExclusive Measurements of pp -> dpi+pi0: Double-Pionic Fusion without ABC Effect
000030021 269__ $$c2009-10
000030021 300__ $$a6
000030021 520__ $$9arXiv$$aExclusive measurements of the reaction pp -> dpi+pi0 have been carried out at T_p = 1.1 GeV at the CELSIUS storage ring using the WASA detector. The isovector pi+pi0 channel exhibits no enhancement at low invariant pipi masses, i. e. no ABC effect. The differential distributions are in agreement with the conventional t-channel Delta-Delta excitation process, which also accounts for the observed energy dependence of the total cross section.
000030021 65017 $$2INSPIRE$$aExperiment-Nucl
000030021 690C_ $$2INSPIRE$$aPublished
000030021 693__ $$eCELSIUS/WASA
000030021 695__ $$2INSPIRE$$ap p: exclusive reaction
000030021 695__ $$2INSPIRE$$api: pair production
000030021 695__ $$2INSPIRE$$achannel cross section: energy dependence
000030021 695__ $$2INSPIRE$$afusion
000030021 695__ $$2INSPIRE$$aUppsala CELSIUS Stor
000030021 695__ $$2INSPIRE$$aisovector
000030021 695__ $$2INSPIRE$$afour-pi-detector
000030021 695__ $$2INSPIRE$$aDelta(1232)
000030021 695__ $$2INSPIRE$$aDalitz plot
000030021 695__ $$2INSPIRE$$amass spectrum
000030021 695__ $$2INSPIRE$$ap p --> deuteron pi+ pi0
000030021 700__ $$aBashkanov, M.
000030021 700__ $$aBogoslawsky, D.
000030021 700__ $$aCalen, H.
000030021 700__ $$aClement, H.
000030021 700__ $$aDemiroers, L.
000030021 700__ $$aEkstrom, C.
000030021 700__ $$aFransson, K.
000030021 700__ $$aGreiff, J.
000030021 700__ $$aGustafsson, L.
000030021 700__ $$aHoistad, B.
000030021 700__ $$aIvanov, G.
000030021 700__ $$aJacewicz, M.
000030021 700__ $$aJiganov, E.
000030021 700__ $$aJohansson, T.
000030021 700__ $$aKhakimova, O.
000030021 700__ $$aKeleta, S.
000030021 700__ $$aKoch, I.
000030021 700__ $$aKullander, S.
000030021 700__ $$aKupsc, A.
000030021 700__ $$aMarciniewski, P.
000030021 700__ $$aMeier, R.
000030021 700__ $$aMorosov, B.
000030021 700__ $$aPauly, C.
000030021 700__ $$aPetren, H.
000030021 700__ $$aPetukhov, Y.
000030021 700__ $$aPovtorejko, A.
000030021 700__ $$aRuber, R.J.M.Y.
000030021 700__ $$aSchonning, K.
000030021 700__ $$aScobel, W.
000030021 700__ $$aSkorodko, T.
000030021 700__ $$aShwartz, B.
000030021 700__ $$aStepaniak, J.
000030021 700__ $$aThorngren-Engblom, P.
000030021 700__ $$aTikhomirov, V.
000030021 700__ $$aWagner, G.J.
000030021 700__ $$aWolke, M.
000030021 700__ $$aYamamoto, A.
000030021 700__ $$aZabierowski, J.
000030021 700__ $$aZlomanczuk, J.
000030021 710__ $$gCELSIUS/WASA Collaboration
000030021 773__ $$a10.1016/j.physletb.2009.12.061$$c110-113$$pPhys.Lett.$$vB684$$y2010
000030021 8564_ $$uhttp://durpdg.dur.ac.uk/cgi-hepdata/hepreac/8422966$$w8422966$$yDURHAM
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/DDel.png$$y00000 Graph of the double-pionic fusion process via $t$-channel $\Delta\Delta$ excitation in the intermediate state.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/MdpiMdpidata.png$$y00006 Dalitz plots of the invariant mass squares $M_{d\pi^0}^2$ versus $M_{\pi^+\pi^0}^2$ ({\bf top}) and $M_{d\pi^0}^2$ versus $M_{d\pi^+}^2$ ({\bf bottom}) for the $pp \to d\pi^+\pi^0 $ reaction at $T_p$ = 1.1 GeV. {\bf Left}: MC simulation, see text, {\bf right}: data.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/MdpiMdpiph.png$$y00005 Dalitz plots of the invariant mass squares $M_{d\pi^0}^2$ versus $M_{\pi^+\pi^0}^2$ ({\bf top}) and $M_{d\pi^0}^2$ versus $M_{d\pi^+}^2$ ({\bf bottom}) for the $pp \to d\pi^+\pi^0 $ reaction at $T_p$ = 1.1 GeV. {\bf Left}: MC simulation, see text, {\bf right}: data.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/MdpiMpipidata2.png$$y00004 Dalitz plots of the invariant mass squares $M_{d\pi^0}^2$ versus $M_{\pi^+\pi^0}^2$ ({\bf top}) and $M_{d\pi^0}^2$ versus $M_{d\pi^+}^2$ ({\bf bottom}) for the $pp \to d\pi^+\pi^0 $ reaction at $T_p$ = 1.1 GeV. {\bf Left}: MC simulation, see text, {\bf right}: data.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/MdpiMpipiph2.png$$y00003 Dalitz plots of the invariant mass squares $M_{d\pi^0}^2$ versus $M_{\pi^+\pi^0}^2$ ({\bf top}) and $M_{d\pi^0}^2$ versus $M_{d\pi^+}^2$ ({\bf bottom}) for the $pp \to d\pi^+\pi^0 $ reaction at $T_p$ = 1.1 GeV. {\bf Left}: MC simulation, see text, {\bf right}: data.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/dEFRH4vsdEFRH3MC.png$$y00001 Energy deposit in the fourth plane of the Forward Range Hodoscope versus that in the third plane after application of conventional $\Delta$E-E cuts and neural net. Left: Monte-Carlo simulation, right: data.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/dEFRH4vsdEFRH3data.png$$y00002 Energy deposit in the fourth plane of the Forward Range Hodoscope versus that in the third plane after application of conventional $\Delta$E-E cuts and neural net. Left: Monte-Carlo simulation, right: data.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/dpi0invmass_dpipi_1100.png$$y00008 Distributions of the invariant masses $M_{d\pi^+}$ ({\bf top left}), $M_{d\pi^0}$ ({\bf top right}) and $M_{\pi^+\pi^0}$ ({\bf bottom left}) as well as of the cm opening angle between the two pions $\delta_{\pi^+\pi^0}$ ({\bf bottom right}) for the $pp \to d\pi^+\pi^0 $ reaction at $T_p$ = 1.1 GeV. The solid dots represent the data of this work. The phase space distributions are indicated by the shaded areas. The t-channel $\Delta\Delta$ calculations according to Risser and Shuster \cite{ris} are shown by the dotted curves, whereas these calculations supplemented by $\vec{\sigma} * (\vec{k_1}~x~\vec{k_2})$ in the reaction amplitude are given by the solid lines. Dashed curves denote calculations for $\rho$ on-shell production.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/dpiplinvmass_dpipi_1100.png$$y00007 Distributions of the invariant masses $M_{d\pi^+}$ ({\bf top left}), $M_{d\pi^0}$ ({\bf top right}) and $M_{\pi^+\pi^0}$ ({\bf bottom left}) as well as of the cm opening angle between the two pions $\delta_{\pi^+\pi^0}$ ({\bf bottom right}) for the $pp \to d\pi^+\pi^0 $ reaction at $T_p$ = 1.1 GeV. The solid dots represent the data of this work. The phase space distributions are indicated by the shaded areas. The t-channel $\Delta\Delta$ calculations according to Risser and Shuster \cite{ris} are shown by the dotted curves, whereas these calculations supplemented by $\vec{\sigma} * (\vec{k_1}~x~\vec{k_2})$ in the reaction amplitude are given by the solid lines. Dashed curves denote calculations for $\rho$ on-shell production.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/dthetacm_dpipi_1100.png$$y00012 Angular distributions of $\pi^0$ and $d$ in the cm system for the $pp \to d\pi^+\pi^0 $ reaction at $T_p$ = 1.1 GeV. The solid dots represent the data of this work. The phase space distribution is indicated by the shaded area. For the meaning of the curves see caption of Fig. 4. Note that dashed, dotted and solid lines coincide here.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/papgruen.png$$y00013 Energy dependence of the total cross section for the $pp \to d\pi^+\pi^0 $ reaction. The open dots are from previous measurements \cite{bys,shim}, the solid dot represents the result of this work. For the meaning of the curves see caption of Fig. 4. Note that solid and dotted curves coincide here.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/pi0thetacm_dpipi_1100.png$$y00011 Angular distributions of $\pi^0$ and $d$ in the cm system for the $pp \to d\pi^+\pi^0 $ reaction at $T_p$ = 1.1 GeV. The solid dots represent the data of this work. The phase space distribution is indicated by the shaded area. For the meaning of the curves see caption of Fig. 4. Note that dashed, dotted and solid lines coincide here.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/pipiopening_dpipi_1100.png$$y00010 Distributions of the invariant masses $M_{d\pi^+}$ ({\bf top left}), $M_{d\pi^0}$ ({\bf top right}) and $M_{\pi^+\pi^0}$ ({\bf bottom left}) as well as of the cm opening angle between the two pions $\delta_{\pi^+\pi^0}$ ({\bf bottom right}) for the $pp \to d\pi^+\pi^0 $ reaction at $T_p$ = 1.1 GeV. The solid dots represent the data of this work. The phase space distributions are indicated by the shaded areas. The t-channel $\Delta\Delta$ calculations according to Risser and Shuster \cite{ris} are shown by the dotted curves, whereas these calculations supplemented by $\vec{\sigma} * (\vec{k_1}~x~\vec{k_2})$ in the reaction amplitude are given by the solid lines. Dashed curves denote calculations for $\rho$ on-shell production.
000030021 8564_ $$uhttp://inspirebeta.net/record/833116/files/piplpi0invmass_dpipi_1100.png$$y00009 Distributions of the invariant masses $M_{d\pi^+}$ ({\bf top left}), $M_{d\pi^0}$ ({\bf top right}) and $M_{\pi^+\pi^0}$ ({\bf bottom left}) as well as of the cm opening angle between the two pions $\delta_{\pi^+\pi^0}$ ({\bf bottom right}) for the $pp \to d\pi^+\pi^0 $ reaction at $T_p$ = 1.1 GeV. The solid dots represent the data of this work. The phase space distributions are indicated by the shaded areas. The t-channel $\Delta\Delta$ calculations according to Risser and Shuster \cite{ris} are shown by the dotted curves, whereas these calculations supplemented by $\vec{\sigma} * (\vec{k_1}~x~\vec{k_2})$ in the reaction amplitude are given by the solid lines. Dashed curves denote calculations for $\rho$ on-shell production.
000030021 902__ $$aTubingen U.
000030021 902__ $$aDubna, JINR
000030021 902__ $$aUppsala U.
000030021 902__ $$aHamburg U.
000030021 902__ $$aJulich, Forschungszentrum
000030021 902__ $$aNovosibirsk, IYF
000030021 902__ $$aWarsaw, Inst. Nucl. Studies
000030021 902__ $$aLodz, IPJ
000030021 902__ $$aKEK, Tsukuba
000030021 909CO $$ooai:jdsweb.jinr.ru:30021$$pglobal
000030021 961__ $$x2009-10-06
000030021 961__ $$c2010-05-05
000030021 970__ $$aSPIRES-8422966
000030021 980__ $$aPublished
000030021 980__ $$aarXiv
000030021 980__ $$aCiteable
000030021 980__ $$aCORE
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