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Paper detail

Indication of a deeply bound compact K-pp state formed in the pp -> p Lambda K+ reaction at 2.85 GeV

We have analyzed data of the DISTO experiment on the exclusive pp -> p Lambda K+ reaction at 2.85 GeV to search for a strongly bound compact K-pp (= X) state to be formed in the pp -> K+ + X reaction. The observed spectra of the K+ missing-mass and the p Lambda invariant-mass with high transverse momenta of p and K+ revealed a broad distinct peak with a mass M_X = 2265 +- 2 (stat) +- 5 (syst) MeV/c2 and a width Gamma_X = 118 +- 8 (stat) +- 10 (syst) MeV.

preprint2010arXivOpen access
T. YamazakiM. MaggioraP. KienleK. SuzukiA. AmorosoM. AlexeevF. BalestraY. BedferR. BertiniL. C. BlandA. BrenschedeF. BrochardM. P. BussaSeonho ChoiM. L. ColantoniR. DresslerM. DzemidzicJ. -Cl. FaivreL. FerreroJ. ForyciarzI. FroehlichV. FrolovR. GarfagniniA. GrassoS. HeinzW. W. JacobsW. KuhnA. MaggioraD. PanzieriH. -W. PfaffG. PontecorvoA. PopovJ. RitmanP. SalaburaS. SosioV. TchalyshevS. E. Vigdor
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T. YamazakiM. MaggioraP. KienleK. SuzukiA. AmorosoM. AlexeevF. BalestraY. BedferR. BertiniL. C. BlandA. BrenschedeF. BrochardM. P. BussaSeonho ChoiM. L. ColantoniR. DresslerM. DzemidzicJ. -Cl. FaivreL. FerreroJ. ForyciarzI. FroehlichV. FrolovR. GarfagniniA. GrassoS. HeinzW. W. JacobsW. KuhnA. MaggioraD. PanzieriH. -W. PfaffG. PontecorvoA. PopovJ. RitmanP. SalaburaS. SosioV. TchalyshevS. E. Vigdor

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